# HG changeset patch
# User John W. Eaton <jwe@octave.org>
# Date 1354944193 18000
# Node ID f96faf028d90ffb6fb84f1145ffb6dc749456e0b
# Parent  72968fb32c82b3f093408220a09f8f9cdd9f70ad
make java functions part of core octave_value classes

* run-octave.in: Set OCTAVE_JAVA_DIR.
* octave-value/ov-java.cc: Rename from dldfcn/__java__.cc.
(get_module_path): Delete.
(initial_java_dir): Don't set architecture dependent directory.
Check environment or use Vfcn_file_dir to set default directory.
(initial_class_path): Don't search load path for octave.jar.
(initialize_jvm): Don't add -Doctave.java.path=DIR to vm_args.
Use DEFUN, not DEFUN_DLD.
(F__java__): Delete.
* octave-value/ov-java.h: Rename from dldfcn/__java__.h.
* dldfcn/module-files: Delete entry for __java__.cc.
* libinterp/Makefile.am (octinclude_HEADERS): Delete $(DLDFCN_INC)
from the list.
* octave-value/module.mk (OCTAVE_VALUE_INC): Add ov-java.h to the list.
(OCTAVE_VALUE_SRC) Add ov-java.cc to the list.
(octave_value_liboctave_value_la_LIBADD): New variable.
(octave_value_liboctave_value_la_CPPFLAGS): Add $(JAVA_CPPFLAGS) to
the list.
* dldfcn/config-module.awk: Don't print DLDFCN_INC variable.
* Octave.java, OctaveReference.java: Don't grab a reference to
__java__.oct.

diff -r 72968fb32c82 -r f96faf028d90 libinterp/Makefile.am
--- a/libinterp/Makefile.am	Fri Dec 07 19:34:19 2012 -0500
+++ b/libinterp/Makefile.am	Sat Dec 08 00:23:13 2012 -0500
@@ -107,8 +107,7 @@
   $(PARSE_TREE_INC) \
   $(OPERATORS_INC) \
   $(INTERP_CORE_INC) \
-  $(INTERPFCN_INC) \
-  $(DLDFCN_INC)
+  $(INTERPFCN_INC)
 
 nodist_octinclude_HEADERS = \
   interp-core/mxarray.h \
diff -r 72968fb32c82 -r f96faf028d90 libinterp/dldfcn/__java__.cc
--- a/libinterp/dldfcn/__java__.cc	Fri Dec 07 19:34:19 2012 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,2242 +0,0 @@
-/*
-
-Copyright (C) 2007 Michael Goffioul
-
-This file is part of Octave.
-
-Octave is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 3 of the License, or (at your
-option) any later version.
-
-Octave is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with Octave; see the file COPYING.  If not, see
-<http://www.gnu.org/licenses/>.
-
-*/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#if defined HAVE_JAVA
-
-#if defined (HAVE_WINDWOS_H)
-#include <windows.h>
-#endif
-
-#include <algorithm>
-#include <map>
-#include <iostream>
-#include <fstream>
-
-#include <clocale>
-
-#include "Cell.h"
-#include "__java__.h"
-#include "cmd-edit.h"
-#include "defun-dld.h"
-#include "file-ops.h"
-#include "file-stat.h"
-#include "load-path.h"
-#include "oct-env.h"
-#include "oct-shlib.h"
-#include "parse.h"
-#include "variables.h"
-
-typedef jint (JNICALL *JNI_CreateJavaVM_t) (JavaVM **pvm, JNIEnv **penv, void *args);
-typedef jint (JNICALL *JNI_GetCreatedJavaVMs_t) (JavaVM **pvm, jsize bufLen, jsize *nVMs);
-
-extern "C"
-{
-  JNIEXPORT jboolean JNICALL
-  Java_org_octave_Octave_call (JNIEnv *, jclass, jstring, jobjectArray,
-                               jobjectArray);
-  JNIEXPORT void JNICALL
-  Java_org_octave_OctaveReference_doFinalize (JNIEnv *, jclass, jint);
-
-  JNIEXPORT void JNICALL
-  Java_org_octave_Octave_doInvoke (JNIEnv *, jclass, jint, jobjectArray);
-
-  JNIEXPORT void JNICALL
-  Java_org_octave_Octave_doEvalString (JNIEnv *, jclass, jstring);
-
-  JNIEXPORT jboolean JNICALL
-  Java_org_octave_Octave_needThreadedInvokation (JNIEnv *, jclass);
-}
-
-static octave_value _java_new (const octave_value_list& args);
-static octave_value _java_invoke (const octave_value_list& args);
-
-static JavaVM *jvm = 0;
-static bool jvm_attached = false;
-
-// Need to keep hold of the shared library handle until exit.
-static octave_shlib jvm_lib;
-
-static std::map<int,octave_value> listener_map;
-static std::map<int,octave_value> octave_ref_map;
-static int octave_java_refcount = 0;
-static long octave_thread_ID = -1;
-
-bool Vjava_convert_matrix = false;
-bool Vjava_unsigned_conversion = true;
-bool Vjava_debug = false;
-
-class JVMArgs
-{
-public:
-
-  JVMArgs (void)
-  {
-    vm_args.version = JNI_VERSION_1_2;
-    vm_args.nOptions = 0;
-    vm_args.options = 0;
-    vm_args.ignoreUnrecognized = false;
-  }
-
-  ~JVMArgs (void)
-  {
-    clean ();
-  }
-
-  JavaVMInitArgs* to_args ()
-  {
-    update ();
-    return &vm_args;
-  }
-
-  void add (const std::string& opt)
-  {
-    java_opts.push_back (opt);
-  }
-
-  void read_java_opts (const std::string& filename)
-  {
-    std::ifstream js (filename.c_str ());
-
-    if (! js.bad () && ! js.fail ())
-      {
-        std::string line;
-
-        while (! js.eof () && ! js.fail ())
-          {
-            std::getline (js, line);
-            if (line.length () > 2
-                && (line.find ("-D") == 0 || line.find ("-X") == 0))
-              java_opts.push_back (line);
-            else if (line.length () > 0 && Vjava_debug)
-              std::cerr << "invalid JVM option, skipping: " << line << std::endl;
-          }
-      }
-  }
-
-private:
-
-  void clean (void)
-  {
-    if (vm_args.options != 0)
-      {
-        for (int i = 0; i < vm_args.nOptions; i++)
-          delete [] vm_args.options[i].optionString;
-        delete [] vm_args.options;
-
-        vm_args.options = 0;
-        vm_args.nOptions = 0;
-      }
-  }
-
-  void update (void)
-  {
-    clean ();
-
-    if (java_opts.size () > 0)
-      {
-        int index = 0;
-
-        vm_args.nOptions = java_opts.size ();
-        vm_args.options = new JavaVMOption [vm_args.nOptions];
-        for (std::list<std::string>::const_iterator it = java_opts.begin (); it != java_opts.end (); ++it)
-          {
-            if (Vjava_debug)
-              std::cout << *it << std::endl;
-            vm_args.options[index++].optionString = strsave ((*it).c_str ());
-          }
-        java_opts.clear ();
-      }
-  }
-
-private:
-
-  JavaVMInitArgs vm_args;
-
-  std::list<std::string> java_opts;
-};
-
-static dim_vector compute_array_dimensions (JNIEnv* jni_env, jobject obj);
-
-#ifdef __WIN32__
-static std::string
-read_registry_string (const std::string& key, const std::string& value)
-{
-  HKEY hkey;
-  DWORD len;
-
-  std::string retval;
-
-  if (! RegOpenKeyEx (HKEY_LOCAL_MACHINE, key.c_str (), 0, KEY_READ, &hkey))
-    {
-      if (! RegQueryValueEx (hkey, value.c_str (), 0, 0, 0, &len))
-        {
-          retval.resize (len);
-          if (RegQueryValueEx (hkey, value.c_str (), 0, 0, (LPBYTE)&retval[0], &len))
-            retval = "";
-          else if (retval[len-1] == '\0')
-            retval.resize (--len);
-        }
-      RegCloseKey (hkey);
-    }
-
-  return retval;
-}
-
-static std::string
-get_module_filename (HMODULE hMod)
-{
-  int n = 1024;
-  std::string retval (n, '\0');
-  bool found = false;
-
-  while (n < 65536)
-    {
-      int status = GetModuleFileName(hMod, &retval[0], n);
-
-      if (status < n)
-        {
-          retval.resize(n);
-          found = true;
-          break;
-        }
-      else
-        {
-          n *= 2;
-          retval.resize(n);
-        }
-    }
-  return (found ? retval : "");
-}
-
-static void
-set_dll_directory (const std::string& dir = "")
-{
-  typedef BOOL (WINAPI *dllfcn_t) (LPCTSTR path);
-
-  static dllfcn_t dllfcn = NULL;
-  static bool first = true;
-
-  if (! dllfcn && first)
-    {
-      HINSTANCE hKernel32 = GetModuleHandle ("kernel32");
-      dllfcn = reinterpret_cast<dllfcn_t> (GetProcAddress (hKernel32, "SetDllDirectoryA"));
-      first = false;
-    }
-
-  if (dllfcn)
-    dllfcn (dir.empty () ? NULL : dir.c_str ());
-}
-#endif
-
-static std::string
-get_module_path (const std::string& name, bool strip_name = true)
-{
-  std::string retval;
-
-  retval = octave_env::make_absolute (load_path::find_file (name),
-                                      octave_env::get_current_directory ());
-
-  if (! retval.empty ())
-    {
-      if (strip_name)
-      {
-        size_t pos = retval.rfind (file_ops::dir_sep_str () + name);
-
-        if (pos != std::string::npos)
-          retval.resize (pos);
-        else
-          throw std::string ("No module path in ") + retval;
-      }
-    }
-  else
-    throw std::string ("Could not find file ") + name;
-
-  return retval;
-}
-
-static std::string
-initial_java_dir (bool arch_dependent = false)
-{
-  static std::string path1;
-  static std::string path2;
-
-  if (arch_dependent)
-    {
-      if (path1.empty ())
-        path1 = get_module_path ("__java__.oct", true);
-
-      return path1;
-    }
-  else
-    {
-      if (path2.empty ())
-        path2 = get_module_path ("javaclasspath.m", true);
-
-      return path2;
-    }
-}
-
-// Read the content of a file filename (usually "classpath.txt")
-//
-// Returns a string with all lines concatenated and separated
-// by the path separator character.
-// The return string also starts with a path separator so that
-// it can be appended easily to a base classpath.
-//
-// The file "classpath.txt" must contain single lines, each
-// with a classpath.
-// Comment lines starting with a '#' or a '%' in column 1 are allowed.
-
-static std::string
-read_classpath_txt (const std::string& filepath)
-{
-  std::string classpath;
-
-  std::ifstream fs (filepath.c_str ());
-
-  if (! fs.bad () && ! fs.fail ())
-    {
-      std::string line;
-
-      while (! fs.eof () && ! fs.fail ())
-        {
-          std::getline (fs, line);
-
-          if (line.length () > 1)
-            {
-              if (line.at(0) == '#' || line.at(0) == '%')
-                ; // skip comments
-              else
-                {
-                  // prepend separator character
-                  classpath.append (dir_path::path_sep_str ());
-
-                  // append content of line without trailing blanks
-                  int iLast = line.find_last_not_of (' ');
-
-                  classpath.append (file_ops::tilde_expand (line.substr (0, iLast+1)));
-                }
-            }
-        }
-    }
-
-  return (classpath);
-}
-
-
-static std::string
-initial_class_path (void)
-{
-  std::string retval = initial_java_dir ();
-
-  // find octave.jar file
-  if (! retval.empty ())
-    {
-      std::string jar_file = get_module_path ("octave.jar", false);
-      file_stat jar_exists (jar_file);
-
-      if (jar_exists)
-        {
-          // initialize static classpath to octave.jar
-          retval = jar_file;
-
-
-          // The base classpath has been set.  Try to find the optional
-          // file "classpath.txt" in two places.  The users classes will
-          // take precedence over the settings defined in the package
-          // directory
-
-          std::string str_filename = "classpath.txt";
-          std::string cp_file;
-          file_stat   cp_exists;
-
-          // Try to read the file "classpath.txt" in the user's home
-          // directory.
-
-          cp_file = file_ops::tilde_expand ("~" + file_ops::dir_sep_str () + str_filename);
-          cp_exists = file_stat (cp_file);
-          if (cp_exists)
-            {
-              // The file "classpath.txt" has been found: add its
-              // contents to the static classpath.
-
-              std::string theClassPath = read_classpath_txt (cp_file);
-              retval.append (theClassPath);
-            }
-
-          // Try to read a file "classpath.txt" in the package directory.
-
-          cp_file = initial_java_dir () + file_ops::dir_sep_str () + str_filename;
-          cp_exists = file_stat (cp_file);
-          if (cp_exists)
-            {
-              // The file "classpath.txt" has been found: add its
-              // contents to the static classpath.
-
-              std::string theClassPath = read_classpath_txt (cp_file);
-              retval.append (theClassPath);
-            }
-        }
-      else
-        throw std::string ("octave jar does not exist: ") + jar_file;
-    }
-  else
-    throw std::string ("initial java dir is empty");
-
-  return retval;
-}
-
-static void
-initialize_jvm (void)
-{
-  JNIEnv *current_env;
-
-  if (jvm)
-    return;
-
-  const char *static_locale = setlocale (LC_ALL, NULL);
-  const std::string locale (static_locale);
-
-#if defined (__WIN32__)
-
-  HMODULE hMod = GetModuleHandle ("jvm.dll");
-  std::string jvm_lib_path;
-  std::string old_cwd;
-
-  if (hMod == NULL)
-    {
-      // In windows, find the location of the JRE from the registry
-      // and load the symbol from the dll.
-      std::string key, value;
-
-      key = "software\\javasoft\\java runtime environment";
-
-      value = octave_env::getenv ("JAVA_VERSION");
-      if (value.empty ())
-        {
-          value = "Currentversion";
-          std::string regval = read_registry_string (key,value);
-
-          if (regval.empty ())
-            throw std::string ("unable to find Java Runtime Environment: ") + key + "::" + value;
-          value = regval;
-        }
-
-      key = key + "\\" + value;
-      value = "RuntimeLib";
-      jvm_lib_path = read_registry_string (key, value);
-      if (jvm_lib_path.empty ())
-        throw std::string ("unable to find Java Runtime Environment: ") + key + "::" + value;
-
-      std::string jvm_bin_path;
-
-      value = "JavaHome";
-      jvm_bin_path = read_registry_string (key, value);
-      if (! jvm_bin_path.empty ())
-        {
-          jvm_bin_path = (jvm_bin_path + std::string ("\\bin"));
-
-          old_cwd = octave_env::get_current_directory ();
-
-          set_dll_directory (jvm_bin_path);
-          octave_env::chdir (jvm_bin_path);
-        }
-    }
-  else
-    {
-      // JVM seems to be already loaded, better to use that DLL instead
-      // of looking in the registry, to avoid opening a different JVM.
-      jvm_lib_path = get_module_filename (hMod);
-
-      if (jvm_lib_path.empty ())
-        throw std::string ("unable to find Java Runtime Environment");
-    }
-
-#else
-
-  std::string jvm_lib_path = JAVA_HOME + std::string ("/jre/lib/") + JAVA_ARCH + "/server/libjvm.so";
-
-#endif
-
-  jsize nVMs = 0;
-
-# if !defined (__APPLE__) && !defined (__MACH__)
-
-  octave_shlib lib (jvm_lib_path);
-
-  if (!lib)
-    throw std::string ("unable to load Java Runtime Environment from ") + jvm_lib_path;
-
-#if defined (__WIN32__)
-
-  set_dll_directory ();
-
-  if (! old_cwd.empty ())
-    octave_env::chdir (old_cwd);
-
-#endif
-
-  JNI_CreateJavaVM_t create_vm = reinterpret_cast<JNI_CreateJavaVM_t> (lib.search ("JNI_CreateJavaVM"));
-  JNI_GetCreatedJavaVMs_t get_vm = reinterpret_cast<JNI_GetCreatedJavaVMs_t> (lib.search ("JNI_GetCreatedJavaVMs"));
-
-  if (!create_vm)
-    throw std::string ("unable to find JNI_CreateJavaVM in ") + jvm_lib_path;
-
-  if (!get_vm)
-    throw std::string ("unable to find JNI_GetCreatedJavaVMs in ") + jvm_lib_path;
-
-  if (get_vm (&jvm, 1, &nVMs) == 0 && nVMs > 0)
-
-#else
-
-  // FIXME: There exists a problem on the Mac platform that
-  //   octave_shlib lib (jvm_lib_path)
-  // doesn't work with 'not-bundled' *.oct files.
-
-  if (JNI_GetCreatedJavaVMs (&jvm, 1, &nVMs) == 0 && nVMs > 0)
-
-#endif
-
-    {
-      // At least one JVM exists, try to attach to it
-
-      switch (jvm->GetEnv (reinterpret_cast<void **> (&current_env), JNI_VERSION_1_2))
-        {
-        case JNI_EDETACHED:
-          // Attach the current thread
-          JavaVMAttachArgs vm_args;
-          vm_args.version = JNI_VERSION_1_2;
-          vm_args.name = const_cast<char *> ("octave");
-          vm_args.group = NULL;
-          if (jvm->AttachCurrentThread (reinterpret_cast<void **> (&current_env), &vm_args) < 0)
-            throw std::string ("JVM internal error, unable to attach octave to existing JVM");
-          break;
-
-        case JNI_EVERSION:
-          throw std::string ("JVM internal error, the required JNI version is not supported");
-          break;
-
-        case JNI_OK:
-          // Don't do anything, the current thread is already attached to JVM
-          break;
-        }
-
-      jvm_attached = true;
-      //printf ("JVM attached\n");
-    }
-  else
-    {
-      // No JVM exists, create one
-
-      JVMArgs vm_args;
-
-      vm_args.add ("-Djava.class.path=" + initial_class_path ());
-      vm_args.add ("-Doctave.java.path=" + initial_java_dir (true));
-      vm_args.add ("-Xrs");
-      vm_args.add ("-Djava.system.class.loader=org.octave.OctClassLoader");
-      vm_args.read_java_opts (initial_java_dir (false) + file_ops::dir_sep_str () + "java.opts");
-
-# if !defined (__APPLE__) && !defined (__MACH__)
-
-      if (create_vm (&jvm, &current_env, vm_args.to_args ()) != JNI_OK)
-        throw std::string ("unable to start Java VM in ")+jvm_lib_path;
-      //printf ("JVM created\n");
-    }
-
-  jvm_lib = lib;
-
-#else
-
-      if (JNI_CreateJavaVM (&jvm, reinterpret_cast<void **> (&current_env),
-                        vm_args.to_args ()) != JNI_OK)
-        throw std::string ("unable to start Java VM in ")+jvm_lib_path;
-
-    }
-
-#endif
-
-  setlocale (LC_ALL, locale.c_str ());
-}
-
-static void
-terminate_jvm (void)
-{
-  if (jvm)
-    {
-      if (jvm_attached)
-        jvm->DetachCurrentThread ();
-      else
-        jvm->DestroyJavaVM ();
-
-      jvm = 0;
-      jvm_attached = false;
-
-      if (jvm_lib)
-        jvm_lib.close ();
-    }
-}
-
-std::string
-jstring_to_string (JNIEnv* jni_env, jstring s)
-{
-  std::string retval;
-
-  if (jni_env)
-    {
-      const char *cstr = jni_env->GetStringUTFChars (s, 0);
-      retval = cstr;
-      jni_env->ReleaseStringUTFChars (s, cstr);
-    }
-
-  return retval;
-}
-
-std::string
-jstring_to_string (JNIEnv* jni_env, jobject obj)
-{
-  std::string retval;
-
-  if (jni_env && obj)
-    {
-      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/String"));
-      if (cls)
-        {
-          if (jni_env->IsInstanceOf (obj, cls))
-            retval = jstring_to_string (jni_env, reinterpret_cast<jstring> (obj));
-        }
-    }
-
-  return retval;
-}
-
-static octave_value
-check_exception (JNIEnv* jni_env)
-{
-  octave_value retval;
-
-  jthrowable_ref ex (jni_env, jni_env->ExceptionOccurred ());
-
-  if (ex)
-    {
-      if (Vjava_debug)
-        jni_env->ExceptionDescribe ();
-
-      jni_env->ExceptionClear ();
-
-      jclass_ref jcls (jni_env, jni_env->GetObjectClass (ex));
-      jmethodID mID = jni_env->GetMethodID (jcls, "toString", "()Ljava/lang/String;");
-      jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (ex, mID)));
-      std::string msg = jstring_to_string (jni_env, js);
-
-      error ("[java] %s", msg.c_str ());
-    }
-  else
-    retval = Matrix ();
-
-  return retval;
-}
-
-static jclass
-find_octave_class (JNIEnv *jni_env, const char *name)
-{
-  static std::string class_loader;
-  static jclass uiClass = 0;
-
-  jclass jcls = jni_env->FindClass (name);
-
-  if (jcls == 0)
-    {
-      jni_env->ExceptionClear ();
-
-      if (! uiClass)
-        {
-          if (class_loader.empty ())
-            {
-              jclass_ref syscls (jni_env, jni_env->FindClass ("java/lang/System"));
-              jmethodID mID = jni_env->GetStaticMethodID (syscls, "getProperty", "(Ljava/lang/String;)Ljava/lang/String;");
-              jstring_ref js (jni_env, jni_env->NewStringUTF ("octave.class.loader"));
-              js = reinterpret_cast<jstring> (jni_env->CallStaticObjectMethod (syscls, mID, jstring (js)));
-              class_loader = jstring_to_string (jni_env, jstring (js));
-              std::replace (class_loader.begin (), class_loader.end (), '.', '/');
-            }
-
-          jclass_ref uicls (jni_env, jni_env->FindClass (class_loader.c_str ()));
-
-          if (! uicls)
-            {
-              jni_env->ExceptionClear ();
-
-              /* Try the netbeans way */
-              std::replace (class_loader.begin (), class_loader.end (), '/', '.');
-              jclass_ref jcls2 (jni_env, jni_env->FindClass ("org/openide/util/Lookup"));
-              jmethodID mID = jni_env->GetStaticMethodID (jcls2, "getDefault", "()Lorg/openide/util/Lookup;");
-              jobject_ref lObj (jni_env, jni_env->CallStaticObjectMethod (jcls2, mID));
-              mID = jni_env->GetMethodID (jcls2, "lookup", "(Ljava/lang/Class;)Ljava/lang/Object;");
-              jclass_ref cLoaderCls (jni_env, jni_env->FindClass ("java/lang/ClassLoader"));
-              jobject_ref cLoader (jni_env, jni_env->CallObjectMethod (lObj, mID, jclass (cLoaderCls)));
-              mID = jni_env->GetMethodID (cLoaderCls, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
-              jstring_ref js (jni_env, jni_env->NewStringUTF (class_loader.c_str ()));
-              uicls = reinterpret_cast<jclass> (jni_env->CallObjectMethod (cLoader, mID, jstring (js)));
-            }
-
-          if (uicls)
-            uiClass = reinterpret_cast<jclass> (jni_env->NewGlobalRef (jclass (uicls)));
-        }
-
-      if (uiClass)
-        {
-          jmethodID mID = jni_env->GetStaticMethodID (uiClass, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
-          jstring_ref js (jni_env, jni_env->NewStringUTF (name));
-          jcls = reinterpret_cast<jclass> (jni_env->CallStaticObjectMethod (uiClass, mID, jstring (js)));
-        }
-    }
-
-  return jcls;
-}
-
-static dim_vector
-compute_array_dimensions (JNIEnv* jni_env, jobject obj)
-{
-  jobjectArray_ref jobj (jni_env, reinterpret_cast<jobjectArray> (obj));
-  jclass_ref jcls (jni_env, jni_env->GetObjectClass (obj));
-  jclass_ref ccls (jni_env, jni_env->GetObjectClass (jcls));
-  jmethodID isArray_ID = jni_env->GetMethodID (ccls, "isArray", "()Z"),
-            getComponentType_ID = jni_env->GetMethodID (ccls, "getComponentType", "()Ljava/lang/Class;");
-
-  dim_vector dv (1, 1);
-  int idx = 0;
-
-  jobj.detach ();
-  while (jcls && jni_env->CallBooleanMethod (jcls, isArray_ID))
-    {
-      int len = (jobj ? jni_env->GetArrayLength (jobj) : 0);
-      if (idx >= dv.length ())
-        dv.resize (idx+1);
-      dv(idx) = len;
-      jcls = reinterpret_cast<jclass> (jni_env->CallObjectMethod (jcls, getComponentType_ID));
-      jobj = (len > 0 ? reinterpret_cast<jobjectArray> (jni_env->GetObjectArrayElement (jobj, 0)) : 0);
-      idx++;
-    }
-
-  return dv;
-}
-
-static jobject
-make_java_index (JNIEnv* jni_env, const octave_value_list& idx)
-{
-  jclass_ref ocls (jni_env, jni_env->FindClass ("[I"));
-  jobjectArray retval = jni_env->NewObjectArray (idx.length (), ocls, 0);
-
-  for (int i = 0; i < idx.length (); i++)
-    {
-      idx_vector v = idx(i).index_vector ();
-
-      if (! error_state)
-        {
-          jintArray_ref i_array (jni_env, jni_env->NewIntArray (v.length ()));
-          jint *buf = jni_env->GetIntArrayElements (i_array, 0);
-
-          for (int k = 0; k < v.length (); k++)
-            buf[k] = v(k);
-
-          jni_env->ReleaseIntArrayElements (i_array, buf, 0);
-          jni_env->SetObjectArrayElement (retval, i, i_array);
-
-          check_exception (jni_env);
-
-          if (error_state)
-            break;
-        }
-      else
-        break;
-    }
-
-  return retval;
-}
-
-static octave_value
-get_array_elements (JNIEnv* jni_env, jobject jobj,
-                    const octave_value_list& idx)
-{
-  octave_value retval;
-  jobject_ref resObj (jni_env);
-  jobject_ref java_idx (jni_env, make_java_index (jni_env, idx));
-
-  if (! error_state)
-    {
-      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "arraySubsref", "(Ljava/lang/Object;[[I)Ljava/lang/Object;");
-      resObj = jni_env->CallStaticObjectMethod (helperClass, mID, jobj, jobject (java_idx));
-    }
-
-  if (resObj)
-    retval = box (jni_env, resObj);
-  else
-    retval = check_exception (jni_env);
-
-  return retval;
-}
-
-static octave_value
-set_array_elements (JNIEnv* jni_env, jobject jobj,
-                    const octave_value_list& idx, const octave_value& rhs)
-{
-  octave_value retval;
-
-  jclass_ref rhsCls (jni_env);
-  jobject_ref resObj (jni_env), rhsObj (jni_env);
-  jobject_ref java_idx (jni_env, make_java_index (jni_env, idx));
-
-  if (! error_state && unbox (jni_env, rhs, rhsObj, rhsCls))
-    {
-      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "arraySubsasgn",
-          "(Ljava/lang/Object;[[ILjava/lang/Object;)Ljava/lang/Object;");
-      resObj = jni_env->CallStaticObjectMethod (helperClass, mID,
-          jobj, jobject (java_idx), jobject (rhsObj));
-    }
-
-  if (resObj)
-    retval = box (jni_env, resObj);
-  else
-    retval = check_exception (jni_env);
-
-  return retval;
-}
-
-static string_vector
-get_invoke_list (JNIEnv* jni_env, jobject jobj)
-{
-  std::list<std::string> name_list;
-
-  if (jni_env)
-    {
-      jclass_ref cls (jni_env, jni_env->GetObjectClass (jobj));
-      jclass_ref ccls (jni_env, jni_env->GetObjectClass (cls));
-      jmethodID getMethods_ID = jni_env->GetMethodID (ccls, "getMethods", "()[Ljava/lang/reflect/Method;"),
-        getFields_ID = jni_env->GetMethodID (ccls, "getFields", "()[Ljava/lang/reflect/Field;");
-      jobjectArray_ref mList (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallObjectMethod (cls, getMethods_ID))),
-        fList (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallObjectMethod (cls, getFields_ID)));
-      int mLen = jni_env->GetArrayLength (mList), fLen = jni_env->GetArrayLength (fList);
-      jclass_ref mCls (jni_env, jni_env->FindClass ("java/lang/reflect/Method")),
-        fCls (jni_env, jni_env->FindClass ("java/lang/reflect/Field"));
-      jmethodID m_getName_ID = jni_env->GetMethodID (mCls, "getName", "()Ljava/lang/String;"),
-        f_getName_ID = jni_env->GetMethodID (fCls, "getName", "()Ljava/lang/String;");
-
-      for (int i = 0; i < mLen; i++)
-        {
-          jobject_ref meth (jni_env, jni_env->GetObjectArrayElement (mList, i));
-          jstring_ref methName (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (meth, m_getName_ID)));
-          name_list.push_back (jstring_to_string (jni_env, methName));
-        }
-
-      for (int i = 0; i < fLen; i++)
-        {
-          jobject_ref field (jni_env, jni_env->GetObjectArrayElement (fList, i));
-          jstring_ref fieldName (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (field, f_getName_ID)));
-          name_list.push_back (jstring_to_string (jni_env, fieldName));
-        }
-    }
-
-  string_vector v (name_list);
-
-  return v.sort (true);
-}
-
-static octave_value
-convert_to_string (JNIEnv *jni_env, jobject java_object, bool force, char type)
-{
-  octave_value retval;
-
-  if (jni_env && java_object)
-    {
-      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/String"));
-
-      if (jni_env->IsInstanceOf (java_object, cls))
-        retval = octave_value (jstring_to_string (jni_env, java_object), type);
-      else if (force)
-        {
-          cls = jni_env->FindClass ("[Ljava/lang/String;");
-
-          if (jni_env->IsInstanceOf (java_object, cls))
-            {
-              jobjectArray array = reinterpret_cast<jobjectArray> (java_object);
-              int len = jni_env->GetArrayLength (array);
-              Cell c (len, 1);
-
-              for (int i = 0; i < len; i++)
-                {
-                  jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->GetObjectArrayElement (array, i)));
-
-                  if (js)
-                    c(i) = octave_value (jstring_to_string (jni_env, js), type);
-                  else
-                    {
-                      c(i) = check_exception (jni_env);
-
-                      if (error_state)
-                        break;
-                    }
-                }
-
-              retval = octave_value (c);
-            }
-          else
-            {
-              cls = jni_env->FindClass ("java/lang/Object");
-              jmethodID mID = jni_env->GetMethodID (cls, "toString", "()Ljava/lang/String;");
-              jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (java_object, mID)));
-
-              if (js)
-                retval = octave_value (jstring_to_string (jni_env, js), type);
-              else
-                retval = check_exception (jni_env);
-            }
-        }
-      else
-        error ("unable to convert Java object to string");
-    }
-
-  return retval;
-}
-
-#define TO_JAVA(obj) dynamic_cast<octave_java*> ((obj).internal_rep ())
-
-octave_value
-box (JNIEnv* jni_env, jobject jobj, jclass jcls)
-{
-  octave_value retval;
-  jclass_ref cls (jni_env);
-
-  if (! jobj)
-    retval = Matrix ();
-
-  if (retval.is_undefined ())
-    {
-      cls = jni_env->FindClass ("java/lang/Integer");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          jmethodID m = jni_env->GetMethodID (cls, "intValue", "()I");
-          retval = jni_env->CallIntMethod (jobj, m);
-        }
-    }
-
-  if (retval.is_undefined ())
-    {
-      cls = jni_env->FindClass ("java/lang/Double");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          jmethodID m = jni_env->GetMethodID (cls, "doubleValue", "()D");
-          retval = jni_env->CallDoubleMethod (jobj, m);
-        }
-    }
-
-  if (retval.is_undefined ())
-    {
-      cls = jni_env->FindClass ("java/lang/Boolean");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          jmethodID m = jni_env->GetMethodID (cls, "booleanValue", "()Z");
-          // MH retval = jni_env->CallBooleanMethod (jobj, m);
-          retval = (jni_env->CallBooleanMethod (jobj, m) ? true : false);
-        }
-    }
-
-  if (retval.is_undefined ())
-    {
-      cls = jni_env->FindClass ("java/lang/String");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          retval = jstring_to_string (jni_env, jobj);
-        }
-    }
-
-  if (retval.is_undefined () && Vjava_convert_matrix)
-    {
-      cls = find_octave_class (jni_env, "org/octave/Matrix");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          jmethodID mID = jni_env->GetMethodID (cls, "getDims", "()[I");
-          jintArray_ref iv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
-          jint *iv_data = jni_env->GetIntArrayElements (jintArray (iv), 0);
-          dim_vector dims;
-          dims.resize (jni_env->GetArrayLength (jintArray (iv)));
-
-          for (int i = 0; i < dims.length (); i++)
-            dims(i) = iv_data[i];
-
-          jni_env->ReleaseIntArrayElements (jintArray (iv), iv_data, 0);
-          mID = jni_env->GetMethodID (cls, "getClassName", "()Ljava/lang/String;");
-          jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (jobj, mID)));
-
-          std::string s = jstring_to_string (jni_env, js);
-
-          if (s == "double")
-            {
-              NDArray m (dims);
-              mID = jni_env->GetMethodID (cls, "toDouble", "()[D");
-              jdoubleArray_ref dv (jni_env, reinterpret_cast<jdoubleArray> (jni_env->CallObjectMethod (jobj, mID)));
-              jni_env->GetDoubleArrayRegion (dv, 0, m.length (), m.fortran_vec ());
-              retval = m;
-            }
-          else if (s == "byte")
-            {
-              if (Vjava_unsigned_conversion)
-                {
-                  uint8NDArray m (dims);
-                  mID = jni_env->GetMethodID (cls, "toByte", "()[B");
-                  jbyteArray_ref dv (jni_env, reinterpret_cast<jbyteArray> (jni_env->CallObjectMethod (jobj, mID)));
-                  jni_env->GetByteArrayRegion (dv, 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
-                  retval = m;
-                }
-              else
-                {
-                  int8NDArray m (dims);
-                  mID = jni_env->GetMethodID (cls, "toByte", "()[B");
-                  jbyteArray_ref dv (jni_env, reinterpret_cast<jbyteArray> (jni_env->CallObjectMethod (jobj, mID)));
-                  jni_env->GetByteArrayRegion (dv, 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
-                  retval = m;
-                }
-            }
-          else if (s == "integer")
-            {
-              if (Vjava_unsigned_conversion)
-                {
-                  uint32NDArray m (dims);
-                  mID = jni_env->GetMethodID (cls, "toInt", "()[I");
-                  jintArray_ref dv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
-                  jni_env->GetIntArrayRegion (dv, 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
-                  retval = m;
-                }
-              else
-                {
-                  int32NDArray m (dims);
-                  mID = jni_env->GetMethodID (cls, "toInt", "()[I");
-                  jintArray_ref dv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
-                  jni_env->GetIntArrayRegion (dv, 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
-                  retval = m;
-                }
-            }
-        }
-    }
-
-  if (retval.is_undefined ())
-    {
-      cls = find_octave_class (jni_env, "org/octave/OctaveReference");
-
-      if (jni_env->IsInstanceOf (jobj, cls))
-        {
-          jmethodID mID = jni_env->GetMethodID (cls, "getID", "()I");
-          int ID = jni_env->CallIntMethod (jobj, mID);
-          std::map<int,octave_value>::iterator it = octave_ref_map.find (ID);
-
-          if (it != octave_ref_map.end ())
-            retval = it->second;
-        }
-    }
-
-  if (retval.is_undefined ())
-    retval = octave_value (new octave_java (jobj, jcls));
-
-  return retval;
-}
-
-octave_value
-box_more (JNIEnv* jni_env, jobject jobj, jclass jcls)
-{
-  octave_value retval = box (jni_env, jobj, jcls);
-
-  if (retval.class_name () == "octave_java")
-    {
-      retval = octave_value ();
-
-      jclass_ref cls (jni_env);
-
-      if (retval.is_undefined ())
-        {
-          cls = jni_env->FindClass ("[D");
-
-          if (jni_env->IsInstanceOf (jobj, cls))
-            {
-              jdoubleArray jarr = reinterpret_cast<jdoubleArray> (jobj);
-              int len = jni_env->GetArrayLength (jarr);
-
-              if (len > 0)
-                {
-                  Matrix m (1, len);
-                  jni_env->GetDoubleArrayRegion (jarr, 0, len, m.fortran_vec ());
-                  retval = m;
-                }
-              else
-                retval = Matrix ();
-            }
-        }
-
-      if (retval.is_undefined ())
-        {
-          cls = jni_env->FindClass ("[[D");
-
-          if (jni_env->IsInstanceOf (jobj, cls))
-            {
-              jobjectArray jarr = reinterpret_cast<jobjectArray> (jobj);
-              int rows = jni_env->GetArrayLength (jarr), cols = 0;
-
-              if (rows > 0)
-                {
-                  Matrix m;
-
-                  for (int r = 0; r < rows; r++)
-                    {
-                      jdoubleArray_ref row (jni_env, reinterpret_cast<jdoubleArray> (jni_env->GetObjectArrayElement (jarr, r)));
-
-                      if (m.length () == 0)
-                        {
-                          cols = jni_env->GetArrayLength (row);
-                          m.resize (cols, rows);
-                        }
-                      jni_env->GetDoubleArrayRegion (row, 0, cols, m.fortran_vec () + r * cols);
-                    }
-                  retval = m.transpose ();
-                }
-              else
-                retval = Matrix ();
-            }
-        }
-
-      if (retval.is_undefined ())
-        {
-          cls = jni_env->FindClass ("[Ljava/lang/String;");
-
-          if (jni_env->IsInstanceOf (jobj, cls))
-            {
-              jobjectArray jarr = reinterpret_cast<jobjectArray> (jobj);
-              int len = jni_env->GetArrayLength (jarr);
-              Cell m (len, 1);
-
-              for (int i = 0; i < len; i++)
-                {
-                  jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->GetObjectArrayElement (jarr, i)));
-                  m(i) = jstring_to_string (jni_env, js);
-                }
-
-              retval = m;
-            }
-        }
-    }
-
-  if (retval.is_undefined ())
-    retval = octave_value (new octave_java (jobj, jcls));
-
-  return retval;
-}
-
-int
-unbox (JNIEnv* jni_env, const octave_value& val, jobject_ref& jobj,
-       jclass_ref& jcls)
-{
-  int found = 1;
-
-  if (val.class_name () == "octave_java")
-    {
-      octave_java *ovj = TO_JAVA (val);
-      jobj = ovj->to_java ();
-      jobj.detach ();
-      jcls = jni_env->GetObjectClass (jobj);
-    }
-  else if (val.is_string ())
-    {
-      std::string s = val.string_value ();
-
-      jobj = jni_env->NewStringUTF (s.c_str ());
-      jcls = jni_env->GetObjectClass (jobj);
-    }
-  else if (val.is_bool_scalar ())
-   {
-      bool bval = val.bool_value ();
-      jclass_ref bcls (jni_env, jni_env->FindClass ("java/lang/Boolean"));
-      jfieldID fid = jni_env->GetStaticFieldID (bcls, "TYPE", "Ljava/lang/Class;");
-      jmethodID mid = jni_env->GetMethodID (bcls, "<init>", "(Z)V");
-      jcls = reinterpret_cast<jclass> (jni_env->GetStaticObjectField (bcls, fid));
-      jobj = jni_env->NewObject (bcls, mid, bval);
-   }
-  else if (val.is_real_scalar ())
-    {
-      double dval = val.double_value ();
-      jclass_ref dcls (jni_env, jni_env->FindClass ("java/lang/Double"));
-      jfieldID fid = jni_env->GetStaticFieldID (dcls, "TYPE", "Ljava/lang/Class;");
-      jmethodID mid = jni_env->GetMethodID (dcls, "<init>", "(D)V");
-      jcls = reinterpret_cast<jclass> (jni_env->GetStaticObjectField (dcls, fid));
-      jobj = jni_env->NewObject (dcls, mid, dval);
-    }
-  else if (val.is_empty ())
-    {
-      jobj = 0;
-      //jcls = jni_env->FindClass ("java/lang/Object");
-      jcls = 0;
-    }
-  else if (!Vjava_convert_matrix
-           && ((val.is_real_matrix ()
-                && (val.rows () == 1 || val.columns () == 1))
-               || val.is_range ()))
-    {
-      Matrix m = val.matrix_value ();
-      jdoubleArray dv = jni_env->NewDoubleArray (m.length ());
-      //for (int i = 0; i < m.length (); i++)
-        jni_env->SetDoubleArrayRegion (dv, 0, m.length (), m.fortran_vec ());
-      jobj = dv;
-      jcls = jni_env->GetObjectClass (jobj);
-    }
-  else if (Vjava_convert_matrix
-           && (val.is_matrix_type () || val.is_range ()) && val.is_real_type ())
-    {
-      jclass_ref mcls (jni_env, find_octave_class (jni_env, "org/octave/Matrix"));
-      dim_vector dims = val.dims ();
-      jintArray_ref iv (jni_env, jni_env->NewIntArray (dims.length ()));
-      jint *iv_data = jni_env->GetIntArrayElements (jintArray (iv), 0);
-
-      for (int i = 0; i < dims.length (); i++)
-        iv_data[i] = dims(i);
-
-      jni_env->ReleaseIntArrayElements (jintArray (iv), iv_data, 0);
-
-      if (val.is_double_type ())
-        {
-          NDArray m = val.array_value ();
-          jdoubleArray_ref dv (jni_env, jni_env->NewDoubleArray (m.length ()));
-          jni_env->SetDoubleArrayRegion (jdoubleArray (dv), 0, m.length (), m.fortran_vec ());
-          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([D[I)V");
-          jobj = jni_env->NewObject (jclass (mcls), mID, jdoubleArray (dv), jintArray (iv));
-          jcls = jni_env->GetObjectClass (jobj);
-        }
-      else if (val.is_int8_type ())
-        {
-          int8NDArray m = val.int8_array_value ();
-          jbyteArray_ref bv (jni_env, jni_env->NewByteArray (m.length ()));
-          jni_env->SetByteArrayRegion (jbyteArray (bv), 0, m.length (), reinterpret_cast <jbyte *> (m.fortran_vec ()));
-          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([B[I)V");
-          jobj = jni_env->NewObject (jclass (mcls), mID, jbyteArray (bv), jintArray (iv));
-          jcls = jni_env->GetObjectClass (jobj);
-        }
-      else if (val.is_uint8_type ())
-        {
-          uint8NDArray m = val.uint8_array_value ();
-          jbyteArray_ref bv (jni_env, jni_env->NewByteArray (m.length ()));
-          jni_env->SetByteArrayRegion (jbyteArray (bv), 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
-          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([B[I)V");
-          jobj = jni_env->NewObject (jclass (mcls), mID, jbyteArray (bv), jintArray (iv));
-          jcls = jni_env->GetObjectClass (jobj);
-        }
-      else if (val.is_int32_type ())
-        {
-          int32NDArray m = val.int32_array_value ();
-          jintArray_ref v (jni_env, jni_env->NewIntArray (m.length ()));
-          jni_env->SetIntArrayRegion (jintArray (v), 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
-          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([I[I)V");
-          jobj = jni_env->NewObject (jclass (mcls), mID, jintArray (v), jintArray (iv));
-          jcls = jni_env->GetObjectClass (jobj);
-        }
-      else
-        {
-          found = 0;
-          error ("cannot convert matrix of type `%s'", val.class_name ().c_str ());
-        }
-    }
-  else if (val.is_cellstr ())
-    {
-      Cell cellStr = val.cell_value ();
-      jclass_ref scls (jni_env, jni_env->FindClass ("java/lang/String"));
-      jobjectArray array = jni_env->NewObjectArray (cellStr.length (), scls, 0);
-      for (int i = 0; i < cellStr.length (); i++)
-        {
-          jstring_ref jstr (jni_env, jni_env->NewStringUTF (cellStr(i).string_value().c_str ()));
-          jni_env->SetObjectArrayElement (array, i, jstr);
-        }
-      jobj = array;
-      jcls = jni_env->GetObjectClass (jobj);
-    }
-  else
-    {
-      jclass rcls = find_octave_class (jni_env, "org/octave/OctaveReference");
-      jmethodID mID = jni_env->GetMethodID (rcls, "<init>", "(I)V");
-      int ID = octave_java_refcount++;
-
-      jobj = jni_env->NewObject (rcls, mID, ID);
-      jcls = rcls;
-      octave_ref_map[ID] = val;
-    }
-
-  return found;
-}
-
-int
-unbox (JNIEnv* jni_env, const octave_value_list& args,
-       jobjectArray_ref& jobjs, jobjectArray_ref& jclss)
-{
-  int found = 1;
-
-  jclass_ref ocls (jni_env, jni_env->FindClass ("java/lang/Object"));
-  jclass_ref ccls (jni_env, jni_env->FindClass ("java/lang/Class"));
-
-  if (! jobjs)
-    jobjs = jni_env->NewObjectArray (args.length (), ocls, 0);
-
-  if (! jclss)
-    jclss = jni_env->NewObjectArray (args.length (), ccls, 0);
-
-  for (int i = 0; i < args.length (); i++)
-    {
-      jobject_ref jobj (jni_env);
-      jclass_ref jcls (jni_env);
-
-      if (! unbox (jni_env, args(i), jobj, jcls))
-        {
-          found = 0;
-          break;
-        }
-
-      jni_env->SetObjectArrayElement (jobjs, i, jobj);
-      jni_env->SetObjectArrayElement (jclss, i, jcls);
-    }
-
-  return found;
-}
-
-
-static long
-get_current_thread_ID (JNIEnv *jni_env)
-{
-  if (jni_env)
-    {
-      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/Thread"));
-      jmethodID mID = jni_env->GetStaticMethodID (cls, "currentThread", "()Ljava/lang/Thread;");
-      jobject_ref jthread (jni_env, jni_env->CallStaticObjectMethod (cls, mID));
-
-      if (jthread)
-        {
-          jclass_ref jth_cls (jni_env, jni_env->GetObjectClass (jthread));
-          mID = jni_env->GetMethodID (jth_cls, "getId", "()J");
-          long result = jni_env->CallLongMethod (jthread, mID);
-          //printf ("current java thread ID = %ld\n", result);
-          return result;
-        }
-    }
-
-  return -1;
-}
-
-static int
-java_event_hook (void)
-{
-  JNIEnv *current_env = octave_java::thread_jni_env ();
-
-  if (current_env)
-    {
-      jclass_ref cls (current_env, find_octave_class (current_env, "org/octave/Octave"));
-      jmethodID mID = current_env->GetStaticMethodID (cls, "checkPendingAction", "()V");
-      current_env->CallStaticVoidMethod (cls, mID);
-    }
-
-  return 0;
-}
-
-static void
-initialize_java (void)
-{
-  if (! jvm)
-    {
-      try
-        {
-          initialize_jvm ();
-
-          JNIEnv *current_env = octave_java::thread_jni_env ();
-
-          octave_java::register_type ();
-          command_editor::add_event_hook (java_event_hook);
-          octave_thread_ID = get_current_thread_ID (current_env);
-          //printf ("octave thread ID=%ld\n", octave_thread_ID);
-        }
-      catch (std::string msg)
-        {
-          error (msg.c_str ());
-        }
-    }
-}
-
-DEFUN_DLD (java_init, , ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Loadable Function} {} java_init ()\n\
-Undocumented internal function.\n\
-@end deftypefn")
-{
-  octave_value retval;
-
-  retval = 0;
-  initialize_java ();
-  if (! error_state)
-    retval = 1;
-
-  return retval;
-}
-
-DEFUN_DLD (java_exit, , ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Loadable Function} {} java_exit ()\n\
-Undocumented internal function.\n\
-@end deftypefn")
-{
-  octave_value retval;
-
-  terminate_jvm ();
-
-  return retval;
-}
-
-DEFUN_DLD (java_new, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{obj} =} java_new (@var{name}, @var{arg1}, ...)\n\
-Create a Java object of class @var{name}, by calling the class constructor with the\n\
-arguments @var{arg1}, ...\n\
-\n\
-@example\n\
-  x = java_new (\"java.lang.StringBuffer\", \"Initial string\")\n\
-@end example\n\
-\n\
-@seealso{java_invoke, java_get, java_set}\n\
-@end deftypefn")
-{
-  return _java_new (args);
-}
-
-DEFUN_DLD (javaObject, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{obj} =} javaObject (@var{name}, @var{arg1}, ...)\n\
-Create a Java object of class @var{name}, by calling the class constructor with the\n\
-arguments @var{arg1}, ...\n\
-The first example creates an unitialized object, \
-while the second example supplies an initializer argument.\n\
-\n\
-@example\n\
-  x = javaObject (\"java.lang.StringBuffer\")\n\
-  x = javaObject (\"java.lang.StringBuffer\", \"Initial string\")\n\
-@end example\n\
-\n\
-@seealso{java_invoke, java_new, java_get, java_set}\n\
-@end deftypefn")
-{
-  return _java_new (args);
-}
-
-// internally called from java_new and javaObject for backward compatibility
-static octave_value _java_new (const octave_value_list& args)
-{
-  octave_value retval;
-
-  initialize_java ();
-  if (! error_state)
-    {
-      JNIEnv *current_env = octave_java::thread_jni_env ();
-
-      if (args.length () > 0)
-        {
-          std::string name = args(0).string_value ();
-          if (! error_state)
-            {
-              octave_value_list tmp;
-              for (int i=1; i<args.length (); i++)
-                tmp(i-1) = args(i);
-              retval = octave_java::do_java_create (current_env, name, tmp);
-            }
-          else
-            error ("java_new: first argument must be a string");
-        }
-      else
-        print_usage ();
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (java_invoke, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{ret} =} java_invoke (@var{obj}, @var{name}, @var{arg1}, ...)\n\
-Invoke the method @var{name} on the Java object @var{obj} with the arguments\n\
-@var{arg1}, ... For static methods, @var{obj} can be a string representing the\n\
-fully qualified name of the corresponding class. The function returns the result\n\
-of the method invocation.\n\
-\n\
-When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
-as a shortcut syntax. For instance, the two following statements are equivalent\n\
-\n\
-@example\n\
-  ret = java_invoke (x, \"method1\", 1.0, \"a string\")\n\
-  ret = x.method1 (1.0, \"a string\")\n\
-@end example\n\
-\n\
-@seealso{java_get, java_set, java_new}\n\
-@end deftypefn")
-{
-  return _java_invoke (args);
-}
-
-DEFUN_DLD (javaMethod, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{ret} =} javaMethod (@var{name}, @var{obj}, @var{arg1}, ...)\n\
-Invoke the method @var{name} on the Java object @var{obj} with the arguments\n\
-@var{arg1}, ... For static methods, @var{obj} can be a string representing the\n\
-fully qualified name of the corresponding class. The function returns the result\n\
-of the method invocation.\n\
-\n\
-When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
-as a shortcut syntax. For instance, the two following statements are equivalent\n\
-\n\
-@example\n\
-  ret = javaMethod (\"method1\", x, 1.0, \"a string\")\n\
-  ret = x.method1 (1.0, \"a string\")\n\
-@end example\n\
-\n\
-@seealso{java_get, java_set, java_new}\n\
-@end deftypefn")
-{
-  octave_value retval;
-
-  if (args.length () > 1)
-    {
-      // swap first two arguments
-      octave_value_list tmp;
-      tmp(0) = args(1);
-      tmp(1) = args(0);
-
-      // copy remaining arguments
-      for (int i=2; i<args.length (); i++)
-        tmp(i) = args(i);
-
-      retval = _java_invoke (tmp);
-    }
-  else
-    {
-      print_usage ();
-    }
-
-  return retval;
-}
-
-// internally called from java_invoke and javaMethod for backward
-// compatibility.
-
-static octave_value
-_java_invoke (const octave_value_list& args)
-{
-  octave_value retval;
-
-  initialize_java ();
-
-  if (! error_state)
-    {
-      JNIEnv *current_env = octave_java::thread_jni_env ();
-
-      if (args.length () > 1)
-        {
-          std::string name = args(1).string_value ();
-          if (! error_state)
-            {
-              octave_value_list tmp;
-              for (int i=2; i<args.length (); i++)
-                tmp(i-2) = args(i);
-
-              if (args(0).class_name () == "octave_java")
-                {
-                  octave_java *jobj = TO_JAVA (args(0));
-                  retval = jobj->do_java_invoke (current_env, name, tmp);
-                }
-              else if (args(0).is_string ())
-                {
-                  std::string cls = args(0).string_value ();
-                  retval = octave_java::do_java_invoke (current_env, cls, name, tmp);
-                }
-              else
-                error ("java_invoke: first argument must be a Java object or a string");
-            }
-          else
-            error ("java_invoke: second argument must be a string");
-        }
-      else
-        print_usage ();
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (java_get, args, ,
-    "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{val} =} java_get (@var{obj}, @var{name})\n\
-Get the value of the field @var{name} of the Java object @var{obj}. For\n\
-static fields, @var{obj} can be a string representing the fully qualified\n\
-name of the corresponding class.\n\
-\n\
-When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
-as a shortcut syntax. For instance, the two following statements are equivalent\n\
-\n\
-@example\n\
-  java_get (x, \"field1\")\n\
-  x.field1\n\
-@end example\n\
-\n\
-@seealso{java_set, java_invoke, java_new}\n\
-@end deftypefn")
-{
-  octave_value retval;
-
-  initialize_java ();
-
-  if (! error_state)
-    {
-      JNIEnv *current_env = octave_java::thread_jni_env ();
-
-      if (args.length () == 2)
-        {
-          std::string name = args(1).string_value ();
-          if (! error_state)
-            {
-              if (args(0).class_name () == "octave_java")
-                {
-                  octave_java *jobj = TO_JAVA (args(0));
-                  retval = jobj->do_java_get (current_env, name);
-                }
-              else if (args(0).is_string ())
-                {
-                  std::string cls = args(0).string_value ();
-                  retval = octave_java::do_java_get (current_env, cls, name);
-                }
-              else
-                error ("java_get: first argument must be a Java object or a string");
-            }
-          else
-            error ("java_get: second argument must be a string");
-        }
-      else
-        print_usage ();
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (java_set, args, ,
-    "-*- texinfo -*-\n\
-@deftypefn {Loadable Function} {@var{obj} =} java_set (@var{obj}, @var{name}, @var{val})\n\
-Set the value of the field @var{name} of the Java object @var{obj} to @var{val}.\n\
-For static fields, @var{obj} can be a string representing the fully qualified named\n\
-of the corresponding Java class.\n\
-\n\
-When @var{obj} is a regular Java object, the structure-like indexing can be used as\n\
-a shortcut syntax. For instance, the two following statements are equivalent\n\
-\n\
-@example\n\
-  java_set (x, \"field1\", val)\n\
-  x.field1 = val\n\
-@end example\n\
-\n\
-@seealso{java_get, java_invoke, java_new}\n\
-@end deftypefn")
-{
-  octave_value retval;
-
-  initialize_java ();
-
-  if (! error_state)
-    {
-      JNIEnv *current_env = octave_java::thread_jni_env ();
-
-      if (args.length () == 3)
-        {
-          std::string name = args(1).string_value ();
-          if (! error_state)
-            {
-              if (args(0).class_name () == "octave_java")
-                {
-                  octave_java *jobj = TO_JAVA (args(0));
-                  retval = jobj->do_java_set (current_env, name, args(2));
-                }
-              else if (args(0).is_string ())
-                {
-                  std::string cls = args(0).string_value ();
-                  retval = octave_java::do_java_set (current_env, cls, name, args(2));
-                }
-              else
-                error ("java_set: first argument must be a Java object or a string");
-            }
-          else
-            error ("java_set: second argument must be a string");
-        }
-      else
-        print_usage ();
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (java2mat, args, ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Loadable Function} {} java2mat (@var{obj})\n\
-Undocumented internal function.\n\
-@end deftypefn")
-{
-  octave_value_list retval;
-
-  initialize_java ();
-
-  if (! error_state)
-    {
-      JNIEnv *current_env = octave_java::thread_jni_env ();
-
-      if (args.length () == 1)
-        {
-          if (args(0).class_name () == "octave_java")
-            {
-              octave_java *jobj = TO_JAVA (args(0));
-              retval(0) = box_more (current_env, jobj->to_java (), 0);
-            }
-          else
-            retval(0) = args(0);
-        }
-      else
-        print_usage ();
-    }
-
-  return retval;
-}
-
-DEFUN_DLD (__java__, , ,
-  "-*- texinfo -*-\n\
-@deftypefn  {Loadable Function} {} __java__ ()\n\
-Undocumented internal function.\n\
-@end deftypefn")
-{
-  return octave_value ();
-}
-
-DEFUN_DLD (java_convert_matrix, args, nargout,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} java_convert_matrix ()\n\
-Query or set the internal variable that determines FIXME.\n\
-@end deftypefn")
-{
-  return SET_INTERNAL_VARIABLE (java_convert_matrix);
-}
-
-DEFUN_DLD (java_unsigned_conversion, args, nargout,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} java_unsigned_conversion ()\n\
-Query or set the internal variable that determines FIXME.\n\
-@end deftypefn")
-{
-  return SET_INTERNAL_VARIABLE (java_unsigned_conversion);
-}
-
-DEFUN_DLD (java_debug, args, nargout,
-  "-*- texinfo -*-\n\
-@deftypefn {Built-in Function} {} java_debug ()\n\
-Query or set the internal variable that determines FIXME.\n\
-@end deftypefn")
-{
-  return SET_INTERNAL_VARIABLE (java_debug);
-}
-
-JNIEXPORT jboolean JNICALL
-Java_org_octave_Octave_call (JNIEnv *env, jclass, jstring funcName,
-                             jobjectArray argin, jobjectArray argout)
-{
-  std::string fname = jstring_to_string (env, funcName);
-
-  int nargout = env->GetArrayLength (argout);
-  int nargin = env->GetArrayLength (argin);
-
-  octave_value_list varargin, varargout;
-
-  for (int i = 0; i < nargin; i++)
-    varargin(i) = box (env, env->GetObjectArrayElement (argin, i), 0);
-
-  varargout = feval (fname, varargin, nargout);
-
-  if (! error_state)
-    {
-      jobjectArray_ref out_objs (env, argout), out_clss (env);
-
-      out_objs.detach ();
-
-      if (unbox (env, varargout, out_objs, out_clss))
-        return true;
-    }
-
-  return false;
-}
-
-JNIEXPORT void JNICALL
-Java_org_octave_OctaveReference_doFinalize (JNIEnv *, jclass, jint ID)
-{
-  octave_ref_map.erase (ID);
-}
-
-JNIEXPORT void JNICALL
-Java_org_octave_Octave_doInvoke (JNIEnv *env, jclass, jint ID,
-                                 jobjectArray args)
-{
-  std::map<int,octave_value>::iterator it = octave_ref_map.find (ID);
-
-  if (it != octave_ref_map.end ())
-    {
-      octave_value val = it->second;
-      int len = env->GetArrayLength (args);
-      octave_value_list oct_args;
-
-      for (int i = 0; i < len; i++)
-        {
-          jobject_ref jobj (env, env->GetObjectArrayElement (args, i));
-          oct_args(i) = box (env, jobj, 0);
-
-          if (error_state)
-            break;
-        }
-
-      if (! error_state)
-        {
-          BEGIN_INTERRUPT_WITH_EXCEPTIONS;
-
-          if (val.is_function_handle ())
-            {
-              octave_function *fcn = val.function_value ();
-              feval (fcn, oct_args);
-            }
-          else if (val.is_cell () && val.length () > 0
-                   && (val.rows () == 1 || val.columns () == 1)
-                   && val.cell_value()(0).is_function_handle ())
-            {
-              Cell c = val.cell_value ();
-              octave_function *fcn = c(0).function_value ();
-
-              for (int i=1; i<c.length (); i++)
-                oct_args(len+i-1) = c(i);
-
-              if (! error_state)
-                feval (fcn, oct_args);
-            }
-          else
-            error ("trying to invoke non-invocable object");
-
-          END_INTERRUPT_WITH_EXCEPTIONS;
-        }
-    }
-}
-
-JNIEXPORT void JNICALL
-Java_org_octave_Octave_doEvalString (JNIEnv *env, jclass, jstring cmd)
-{
-  std::string s = jstring_to_string (env, cmd);
-  int pstatus;
-  eval_string (s, false, pstatus, 0);
-}
-
-JNIEXPORT jboolean JNICALL
-Java_org_octave_Octave_needThreadedInvokation (JNIEnv *env, jclass)
-{
-  return (get_current_thread_ID (env) != octave_thread_ID);
-}
-
-// octave_java class definition
-
-DEFINE_OCTAVE_ALLOCATOR (octave_java);
-
-DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_java, "octave_java", "octave_java");
-
-dim_vector
-octave_java::dims (void) const
-{
-  JNIEnv *current_env = thread_jni_env ();
-
-  if (current_env && java_object)
-    return compute_array_dimensions (current_env, java_object);
-  else
-    return dim_vector (1, 1);
-}
-
-JNIEnv *
-octave_java::thread_jni_env (void)
-{
-  JNIEnv *env = NULL;
-
-  if (jvm)
-    jvm->GetEnv (reinterpret_cast<void **> (&env), JNI_VERSION_1_2);
-
-  return env;
-}
-
-octave_value_list
-octave_java::subsref (const std::string& type,
-                      const std::list<octave_value_list>& idx, int nargout)
-{
-  octave_value_list retval;
-  int skip = 1;
-
-  JNIEnv *current_env = thread_jni_env ();
-
-  switch (type[0])
-    {
-    case '.':
-      if (type.length () > 1 && type[1] == '(')
-        {
-          octave_value_list ovl;
-          count++;
-          ovl(0) = octave_value (this);
-          ovl(1) = (idx.front ())(0);
-          std::list<octave_value_list>::const_iterator it = idx.begin ();
-          ovl.append (*++it);
-          retval = feval (std::string ("java_invoke"), ovl, 1);
-          skip++;
-        }
-      else
-        {
-          octave_value_list ovl;
-          count++;
-          ovl(0) = octave_value (this);
-          ovl(1) = (idx.front ())(0);
-          retval = feval (std::string ("java_get"), ovl, 1);
-        }
-      break;
-
-    case '(':
-      if (current_env)
-        retval = get_array_elements (current_env, to_java (), idx.front ());
-      break;
-
-    default:
-      error ("subsref: Java object cannot be indexed with %c", type[0]);
-      break;
-    }
-
-  if (idx.size () > 1 && type.length () > 1)
-    retval = retval(0).next_subsref (nargout, type, idx, skip);
-
-  return retval;
-}
-
-octave_value
-octave_java::subsasgn (const std::string& type,
-                       const std::list<octave_value_list>&idx,
-                       const octave_value &rhs)
-{
-  octave_value retval;
-
-  JNIEnv *current_env = thread_jni_env ();
-
-  switch (type[0])
-    {
-      case '.':
-        if (type.length () == 1)
-          {
-            // field assignment
-            octave_value_list ovl;
-            count++;
-            ovl(0) = octave_value (this);
-            ovl(1) = (idx.front ())(0);
-            ovl(2) = rhs;
-            feval ("java_set", ovl, 0);
-            if (! error_state)
-              {
-                count++;
-                retval = octave_value (this);
-              }
-          }
-        else if (type.length () > 2 && type[1] == '(')
-          {
-            std::list<octave_value_list> new_idx;
-            std::list<octave_value_list>::const_iterator it = idx.begin ();
-            new_idx.push_back (*it++);
-            new_idx.push_back (*it++);
-            octave_value_list u = subsref (type.substr (0, 2), new_idx, 1);
-            if (! error_state)
-              {
-                std::list<octave_value_list> next_idx (idx);
-                next_idx.erase (next_idx.begin ());
-                next_idx.erase (next_idx.begin ());
-                u(0).subsasgn (type.substr (2), next_idx, rhs);
-                if (! error_state)
-                  {
-                    count++;
-                    retval = octave_value (this);
-                  }
-              }
-          }
-        else if (type[1] == '.')
-          {
-            octave_value_list u = subsref (type.substr (0, 1), idx, 1);
-            if (! error_state)
-              {
-                std::list<octave_value_list> next_idx (idx);
-                next_idx.erase (next_idx.begin ());
-                u(0).subsasgn (type.substr (1), next_idx, rhs);
-                if (! error_state)
-                  {
-                    count++;
-                    retval = octave_value (this);
-                  }
-              }
-          }
-        else
-          error ("invalid indexing/assignment on Java object");
-        break;
-
-      case '(':
-        if (current_env)
-          {
-            set_array_elements (current_env, to_java (), idx.front (), rhs);
-            if (! error_state)
-              {
-                count++;
-                retval = octave_value (this);
-              }
-          }
-        break;
-
-      default:
-        error ("Java object cannot be indexed with %c", type[0]);
-        break;
-    }
-
-  return retval;
-}
-
-string_vector
-octave_java::map_keys (void) const
-{
-  JNIEnv *current_env = thread_jni_env ();
-
-  if (current_env)
-    return get_invoke_list (current_env, to_java ());
-  else
-    return string_vector ();
-}
-
-octave_value
-octave_java::convert_to_str_internal (bool, bool force, char type) const
-{
-  JNIEnv *current_env = thread_jni_env ();
-
-  if (current_env)
-    return convert_to_string (current_env, to_java (), force, type);
-  else
-    return octave_value ("");
-}
-
-octave_value
-octave_java::do_java_invoke (JNIEnv* jni_env, const std::string& name,
-                             const octave_value_list& args)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
-      if (unbox (jni_env, args, arg_objs, arg_types))
-        {
-          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeMethod",
-                                                      "(Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
-          jstring_ref methName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-          jobjectArray_ref resObj (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallStaticObjectMethod (helperClass, mID,
-                                                                                                             to_java (), jstring (methName), jobjectArray (arg_objs), jobjectArray (arg_types))));
-          if (resObj)
-            retval = box (jni_env, resObj);
-          else
-            retval = check_exception (jni_env);
-        }
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java:: do_java_invoke (JNIEnv* jni_env,
-                              const std::string& class_name,
-                              const std::string& name,
-                              const octave_value_list& args)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
-      if (unbox (jni_env, args, arg_objs, arg_types))
-        {
-          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeStaticMethod",
-                                                      "(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
-          jstring_ref methName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-          jstring_ref clsName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
-          jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
-                                                                        jstring (clsName), jstring (methName), jobjectArray (arg_objs), jobjectArray (arg_types)));
-          if (resObj)
-            retval = box (jni_env, resObj);
-          else
-            retval = check_exception (jni_env);
-        }
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java::do_java_create (JNIEnv* jni_env, const std::string& name,
-                             const octave_value_list& args)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
-
-      if (unbox (jni_env, args, arg_objs, arg_types))
-        {
-          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeConstructor",
-                                                      "(Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
-          jstring_ref clsName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-          jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
-                                                                        jstring (clsName), jobjectArray (arg_objs), jobjectArray (arg_types)));
-
-          if (resObj)
-            retval = box (jni_env, resObj);
-          else
-            check_exception (jni_env);
-        }
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java::do_java_get (JNIEnv* jni_env, const std::string& name)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "getField",
-          "(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;");
-      jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-      jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
-          to_java (), jstring (fName)));
-
-      if (resObj)
-        retval = box (jni_env, resObj);
-      else
-        retval = check_exception (jni_env);
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java::do_java_get (JNIEnv* jni_env, const std::string& class_name,
-                          const std::string& name)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "getStaticField",
-          "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;");
-      jstring_ref cName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
-      jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-      jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
-          jstring (cName), jstring (fName)));
-      if (resObj)
-        retval = box (jni_env, resObj);
-      else
-        retval = check_exception (jni_env);
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java::do_java_set (JNIEnv* jni_env, const std::string& name,
-                          const octave_value& val)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jobject_ref jobj (jni_env);
-      jclass_ref jcls (jni_env);
-
-      if (unbox (jni_env, val, jobj, jcls))
-        {
-          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "setField",
-                                                      "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V");
-          jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-          jni_env->CallStaticObjectMethod (helperClass, mID, to_java (), jstring (fName), jobject (jobj));
-          check_exception (jni_env);
-        }
-    }
-
-  return retval;
-}
-
-octave_value
-octave_java::do_java_set (JNIEnv* jni_env, const std::string& class_name,
-                          const std::string& name, const octave_value& val)
-{
-  octave_value retval;
-
-  if (jni_env)
-    {
-      jobject_ref jobj (jni_env);
-      jclass_ref jcls (jni_env);
-
-      if (unbox (jni_env, val, jobj, jcls))
-        {
-          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
-          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "setStaticField",
-                                                      "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;)V");
-          jstring_ref cName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
-          jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
-          jni_env->CallStaticObjectMethod (helperClass, mID, jstring (cName), jstring (fName), jobject (jobj));
-          check_exception (jni_env);
-        }
-    }
-
-  return retval;
-}
-
-#endif
-
diff -r 72968fb32c82 -r f96faf028d90 libinterp/dldfcn/__java__.h
--- a/libinterp/dldfcn/__java__.h	Fri Dec 07 19:34:19 2012 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,324 +0,0 @@
-/*
-
-Copyright (C) 2007 Michael Goffioul
-
-This file is part of Octave.
-
-Octave is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 3 of the License, or (at your
-option) any later version.
-
-Octave is distributed in the hope that it will be useful, but WITHOUT
-ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with Octave; see the file COPYING.  If not, see
-<http://www.gnu.org/licenses/>.
-
-*/
-
-#if !defined (octave___java__h)
-#define octave___java__h 1
-
-#include <jni.h>
-
-#include <oct-obj.h>
-#include <ov.h>
-
-#ifdef JAVAPKG_BUILD
-# define JAVAPKG_API OCTAVE_EXPORT
-#else
-# define JAVAPKG_API OCTAVE_IMPORT
-#endif
-
-template <class T>
-class java_local_ref
-{
-public:
-
-  java_local_ref (JNIEnv *_env)
-    : jobj (0), detached (false), env (_env) { }
-
-  java_local_ref (JNIEnv *_env, T obj)
-    : jobj (obj), detached (false), env (_env) { }
-
-  ~java_local_ref (void) { release (); }
-
-  T& operator= (T obj)
-  {
-    release ();
-    jobj = obj;
-    detached = false;
-    return jobj;
-  }
-
-  operator bool () const { return (jobj != 0); }
-  operator T () { return jobj; }
-
-  void detach (void) { detached = true; }
-
-private:
-
-  void release (void)
-  {
-    if (env && jobj && ! detached)
-      env->DeleteLocalRef (jobj);
-
-    jobj = 0;
-  }
-
-  java_local_ref (void)
-    : jobj (0), detached (false), env (0)
-  { }
-
-protected:
-  T jobj;
-  bool detached;
-  JNIEnv *env;
-};
-
-typedef java_local_ref<jobject> jobject_ref;
-typedef java_local_ref<jclass> jclass_ref;
-typedef java_local_ref<jstring> jstring_ref;
-typedef java_local_ref<jobjectArray> jobjectArray_ref;
-typedef java_local_ref<jintArray> jintArray_ref;
-typedef java_local_ref<jbyteArray> jbyteArray_ref;
-typedef java_local_ref<jdoubleArray> jdoubleArray_ref;
-typedef java_local_ref<jthrowable> jthrowable_ref;
-
-extern JAVAPKG_API std::string
-jstring_to_string (JNIEnv* jni_env, jstring s);
-
-extern JAVAPKG_API std::string
-jstring_to_string (JNIEnv* jni_env, jobject obj);
-
-extern JAVAPKG_API octave_value
-box (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
-
-extern JAVAPKG_API octave_value
-box_more (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
-
-extern JAVAPKG_API int
-unbox (JNIEnv* jni_env, const octave_value& val, jobject_ref& jobj,
-       jclass_ref& jcls);
-
-extern JAVAPKG_API int
-unbox (JNIEnv* jni_env, const octave_value_list& args,
-       jobjectArray_ref& jobjs, jobjectArray_ref& jclss);
-
-extern JAVAPKG_API bool Vjava_convert_matrix;
-
-extern JAVAPKG_API bool Vjava_unsigned_conversion;
-
-extern JAVAPKG_API bool Vjava_debug;
-
-class JAVAPKG_API octave_java : public octave_base_value
-{
-public:
-
-  octave_java (void)
-    : octave_base_value (), java_object (0), java_class (0)
-  { }
-
-  octave_java (const octave_java& jobj)
-    : octave_base_value (jobj), java_object (0), java_class (0)
-  {
-    init (jobj.java_object, jobj.java_class);
-  }
-
-  octave_java (const jobject& obj, jclass cls = 0)
-    : octave_base_value (), java_object (0)
-  {
-    init (obj, cls);
-  }
-
-  ~octave_java (void) { release (); }
-
-  jobject to_java (void) const { return java_object; }
-  jclass to_class (void) const { return java_class; }
-
-  std::string java_class_name (void) const { return java_type; }
-
-  octave_base_value* clone (void) const { return new octave_java (*this); }
-  octave_base_value* empty_clone (void) const { return new octave_java (); }
-
-  bool is_defined (void) const { return true; }
-
-  bool is_map (void) const { return true; }
-
-  string_vector map_keys (void) const;
-
-  dim_vector dims (void) const;
-
-  void print (std::ostream& os, bool pr_as_read_syntax = false) const
-  {
-    os << "<Java object: " << java_type << ">";
-    newline(os);
-  }
-
-  void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const
-  {
-    print(os, pr_as_read_syntax);
-  }
-
-  octave_value_list
-  subsref (const std::string& type,
-           const std::list<octave_value_list>& idx, int nargout);
-
-  octave_value
-  subsref (const std::string& type, const std::list<octave_value_list>& idx)
-  {
-    octave_value_list retval = subsref (type, idx, 1);
-    return (retval.length () > 0 ? retval(0) : octave_value ());
-  }
-
-  octave_value subsasgn (const std::string& type,
-                         const std::list<octave_value_list>& idx,
-                         const octave_value& rhs);
-
-  octave_value convert_to_str_internal (bool pad, bool force, char type) const;
-
-  bool is_string (void) const
-  {
-    JNIEnv *current_env = thread_jni_env ();
-
-    if (current_env && java_object)
-      {
-        jclass_ref cls (current_env, current_env->FindClass ("java/lang/String"));
-        return current_env->IsInstanceOf (java_object, cls);
-      }
-
-    return false;
-  }
-
-  static JNIEnv* thread_jni_env (void);
-
-  octave_value do_java_invoke (JNIEnv* jni_env, const std::string& name,
-                               const octave_value_list& args);
-
-  octave_value
-  do_java_invoke (const std::string& name, const octave_value_list& args)
-  {
-    return do_java_invoke(thread_jni_env (), name, args);
-  }
-
-  static octave_value
-  do_java_invoke (JNIEnv* jni_env, const std::string& class_name,
-                  const std::string& name, const octave_value_list& args);
-
-  static octave_value
-  do_java_invoke (const std::string& class_name, const std::string& name,
-                  const octave_value_list& args)
-  {
-    return do_java_invoke(thread_jni_env (), class_name, name, args);
-  }
-
-  static octave_value
-  do_java_create (JNIEnv* jni_env, const std::string& name,
-                  const octave_value_list& args);
-
-  static octave_value
-  do_java_create (const std::string& name, const octave_value_list& args)
-  {
-    return do_java_create (thread_jni_env (), name, args);
-  }
-
-  octave_value do_java_get (JNIEnv* jni_env, const std::string& name);
-
-  octave_value do_java_get (const std::string& name)
-  {
-    return do_java_get (thread_jni_env (), name);
-  }
-
-  static octave_value
-  do_java_get (JNIEnv* jni_env, const std::string& class_name,
-               const std::string& name);
-
-  static octave_value
-  do_java_get (const std::string& class_name, const std::string& name)
-  {
-    return do_java_get (thread_jni_env (), class_name, name);
-  }
-
-  octave_value do_java_set (JNIEnv* jni_env, const std::string& name,
-                            const octave_value& val);
-
-  octave_value do_java_set (const std::string& name, const octave_value& val)
-  {
-    return do_java_set (thread_jni_env (), name, val);
-  }
-
-  static octave_value
-  do_java_set (JNIEnv* jni_env, const std::string& class_name,
-               const std::string& name, const octave_value& val);
-
-  static octave_value
-  do_java_set (const std::string& class_name, const std::string& name,
-               const octave_value& val)
-  {
-    return do_java_set (thread_jni_env (), class_name, name, val);
-  }
-
-private:
-
-  void init (jobject jobj, jclass jcls)
-  {
-    JNIEnv *current_env = thread_jni_env ();
-
-    if (current_env)
-      {
-        if (jobj)
-          java_object = current_env->NewGlobalRef (jobj);
-
-        if (jcls)
-          java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jcls));
-        else if (java_object)
-          {
-            jclass_ref ocls (current_env, current_env->GetObjectClass (java_object));
-            java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jclass (ocls)));
-          }
-
-        if (java_class)
-          {
-            jclass_ref clsCls (current_env, current_env->GetObjectClass (java_class));
-            jmethodID mID = current_env->GetMethodID (clsCls, "getCanonicalName", "()Ljava/lang/String;");
-            jobject_ref resObj (current_env, current_env->CallObjectMethod (java_class, mID));
-            java_type = jstring_to_string (current_env, resObj);
-          }
-      }
-  }
-
-  void release (void)
-  {
-    JNIEnv *current_env = thread_jni_env ();
-
-    if (current_env)
-      {
-        if (java_object)
-          current_env->DeleteGlobalRef (java_object);
-
-        if (java_class)
-          current_env->DeleteGlobalRef (java_class);
-
-        java_object = 0;
-        java_class = 0;
-      }
-  }
-
-private:
-
-  DECLARE_OCTAVE_ALLOCATOR
-
-  DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
-
-  jobject java_object;
-
-  jclass java_class;
-
-  std::string java_type;
-};
-
-#endif /* __JAVA__H__ */
diff -r 72968fb32c82 -r f96faf028d90 libinterp/dldfcn/config-module.awk
--- a/libinterp/dldfcn/config-module.awk	Fri Dec 07 19:34:19 2012 -0500
+++ b/libinterp/dldfcn/config-module.awk	Sat Dec 08 00:23:13 2012 -0500
@@ -10,10 +10,6 @@
   print "  dldfcn/module-files \\"
   print "  dldfcn/oct-qhull.h"
   print ""
-## Kluge...
-  print "DLDFCN_INC = \\"
-  print "  dldfcn/__java__.h"
-  print ""
 }
 /^#.*/ { next; }
 {
diff -r 72968fb32c82 -r f96faf028d90 libinterp/dldfcn/module-files
--- a/libinterp/dldfcn/module-files	Fri Dec 07 19:34:19 2012 -0500
+++ b/libinterp/dldfcn/module-files	Sat Dec 08 00:23:13 2012 -0500
@@ -5,7 +5,6 @@
 __glpk__.cc|$(GLPK_CPPFLAGS)|$(GLPK_LDFLAGS)|$(GLPK_LIBS)
 __init_fltk__.cc|$(GRAPHICS_CFLAGS) $(FT2_CPPFLAGS)|$(GRAPHICS_LDFLAGS) $(FT2_LDFLAGS)|$(GRAPHICS_LIBS) $(FT2_LIBS)
 __init_gnuplot__.cc
-__java__.cc|$(JAVA_CPPFLAGS)||$(JAVA_LIBS)
 __magick_read__.cc|$(MAGICK_CPPFLAGS)|$(MAGICK_LDFLAGS)|$(MAGICK_LIBS)
 __voronoi__.cc|$(QHULL_CPPFLAGS)|$(QHULL_LDFLAGS)|$(QHULL_LIBS)
 amd.cc|$(SPARSE_XCPPFLAGS)|$(SPARSE_XLDFLAGS)|$(SPARSE_XLIBS)
diff -r 72968fb32c82 -r f96faf028d90 libinterp/octave-value/module.mk
--- a/libinterp/octave-value/module.mk	Fri Dec 07 19:34:19 2012 -0500
+++ b/libinterp/octave-value/module.mk	Sat Dec 08 00:23:13 2012 -0500
@@ -51,6 +51,7 @@
   octave-value/ov-flt-cx-mat.h \
   octave-value/ov-flt-re-diag.h \
   octave-value/ov-flt-re-mat.h \
+  octave-value/ov-java.h \
   octave-value/ov-lazy-idx.h \
   octave-value/ov-mex-fcn.h \
   octave-value/ov-null-mat.h \
@@ -108,6 +109,7 @@
   octave-value/ov-flt-cx-mat.cc \
   octave-value/ov-flt-re-diag.cc \
   octave-value/ov-flt-re-mat.cc \
+  octave-value/ov-java.cc \
   octave-value/ov-lazy-idx.cc \
   octave-value/ov-mex-fcn.cc \
   octave-value/ov-null-mat.cc \
@@ -128,4 +130,14 @@
 noinst_LTLIBRARIES += octave-value/liboctave-value.la
 
 octave_value_liboctave_value_la_SOURCES = $(OCTAVE_VALUE_SRC)
-octave_value_liboctave_value_la_CPPFLAGS = $(liboctinterp_la_CPPFLAGS)
+
+## FIXME -- maybe it would be better to limit the JAVA flags to
+## the compile commands for ov-java.cc?  Does JAVA_LIBS need to be
+## added to LIBOCTINTERP_LINK_DEPS (see libinterp/link-deps.mk)?
+## Should we have a separate set of JAVA_LDFLAGS?
+
+octave_value_liboctave_value_la_CPPFLAGS = \
+  $(liboctinterp_la_CPPFLAGS) \
+  $(JAVA_CPPFLAGS)
+
+octave_value_liboctave_value_la_LIBADD = $(JAVA_LIBS)
diff -r 72968fb32c82 -r f96faf028d90 libinterp/octave-value/ov-java.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/octave-value/ov-java.cc	Sat Dec 08 00:23:13 2012 -0500
@@ -0,0 +1,2206 @@
+/*
+
+Copyright (C) 2007 Michael Goffioul
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if defined HAVE_JAVA
+
+#if defined (HAVE_WINDWOS_H)
+#include <windows.h>
+#endif
+
+#include <algorithm>
+#include <map>
+#include <iostream>
+#include <fstream>
+
+#include <clocale>
+
+#include "Cell.h"
+#include "cmd-edit.h"
+#include "defaults.h"
+#include "defun.h"
+#include "file-ops.h"
+#include "file-stat.h"
+#include "load-path.h"
+#include "oct-env.h"
+#include "oct-shlib.h"
+#include "ov-java.h"
+#include "parse.h"
+#include "variables.h"
+
+typedef jint (JNICALL *JNI_CreateJavaVM_t) (JavaVM **pvm, JNIEnv **penv, void *args);
+typedef jint (JNICALL *JNI_GetCreatedJavaVMs_t) (JavaVM **pvm, jsize bufLen, jsize *nVMs);
+
+extern "C"
+{
+  JNIEXPORT jboolean JNICALL
+  Java_org_octave_Octave_call (JNIEnv *, jclass, jstring, jobjectArray,
+                               jobjectArray);
+  JNIEXPORT void JNICALL
+  Java_org_octave_OctaveReference_doFinalize (JNIEnv *, jclass, jint);
+
+  JNIEXPORT void JNICALL
+  Java_org_octave_Octave_doInvoke (JNIEnv *, jclass, jint, jobjectArray);
+
+  JNIEXPORT void JNICALL
+  Java_org_octave_Octave_doEvalString (JNIEnv *, jclass, jstring);
+
+  JNIEXPORT jboolean JNICALL
+  Java_org_octave_Octave_needThreadedInvokation (JNIEnv *, jclass);
+}
+
+static octave_value _java_new (const octave_value_list& args);
+static octave_value _java_invoke (const octave_value_list& args);
+
+static JavaVM *jvm = 0;
+static bool jvm_attached = false;
+
+// Need to keep hold of the shared library handle until exit.
+static octave_shlib jvm_lib;
+
+static std::map<int,octave_value> listener_map;
+static std::map<int,octave_value> octave_ref_map;
+static int octave_java_refcount = 0;
+static long octave_thread_ID = -1;
+
+bool Vjava_convert_matrix = false;
+bool Vjava_unsigned_conversion = true;
+bool Vjava_debug = false;
+
+class JVMArgs
+{
+public:
+
+  JVMArgs (void)
+  {
+    vm_args.version = JNI_VERSION_1_2;
+    vm_args.nOptions = 0;
+    vm_args.options = 0;
+    vm_args.ignoreUnrecognized = false;
+  }
+
+  ~JVMArgs (void)
+  {
+    clean ();
+  }
+
+  JavaVMInitArgs* to_args ()
+  {
+    update ();
+    return &vm_args;
+  }
+
+  void add (const std::string& opt)
+  {
+    java_opts.push_back (opt);
+  }
+
+  void read_java_opts (const std::string& filename)
+  {
+    std::ifstream js (filename.c_str ());
+
+    if (! js.bad () && ! js.fail ())
+      {
+        std::string line;
+
+        while (! js.eof () && ! js.fail ())
+          {
+            std::getline (js, line);
+            if (line.length () > 2
+                && (line.find ("-D") == 0 || line.find ("-X") == 0))
+              java_opts.push_back (line);
+            else if (line.length () > 0 && Vjava_debug)
+              std::cerr << "invalid JVM option, skipping: " << line << std::endl;
+          }
+      }
+  }
+
+private:
+
+  void clean (void)
+  {
+    if (vm_args.options != 0)
+      {
+        for (int i = 0; i < vm_args.nOptions; i++)
+          delete [] vm_args.options[i].optionString;
+        delete [] vm_args.options;
+
+        vm_args.options = 0;
+        vm_args.nOptions = 0;
+      }
+  }
+
+  void update (void)
+  {
+    clean ();
+
+    if (java_opts.size () > 0)
+      {
+        int index = 0;
+
+        vm_args.nOptions = java_opts.size ();
+        vm_args.options = new JavaVMOption [vm_args.nOptions];
+        for (std::list<std::string>::const_iterator it = java_opts.begin (); it != java_opts.end (); ++it)
+          {
+            if (Vjava_debug)
+              std::cout << *it << std::endl;
+            vm_args.options[index++].optionString = strsave ((*it).c_str ());
+          }
+        java_opts.clear ();
+      }
+  }
+
+private:
+
+  JavaVMInitArgs vm_args;
+
+  std::list<std::string> java_opts;
+};
+
+static dim_vector compute_array_dimensions (JNIEnv* jni_env, jobject obj);
+
+#ifdef __WIN32__
+static std::string
+read_registry_string (const std::string& key, const std::string& value)
+{
+  HKEY hkey;
+  DWORD len;
+
+  std::string retval;
+
+  if (! RegOpenKeyEx (HKEY_LOCAL_MACHINE, key.c_str (), 0, KEY_READ, &hkey))
+    {
+      if (! RegQueryValueEx (hkey, value.c_str (), 0, 0, 0, &len))
+        {
+          retval.resize (len);
+          if (RegQueryValueEx (hkey, value.c_str (), 0, 0, (LPBYTE)&retval[0], &len))
+            retval = "";
+          else if (retval[len-1] == '\0')
+            retval.resize (--len);
+        }
+      RegCloseKey (hkey);
+    }
+
+  return retval;
+}
+
+static std::string
+get_module_filename (HMODULE hMod)
+{
+  int n = 1024;
+  std::string retval (n, '\0');
+  bool found = false;
+
+  while (n < 65536)
+    {
+      int status = GetModuleFileName(hMod, &retval[0], n);
+
+      if (status < n)
+        {
+          retval.resize(n);
+          found = true;
+          break;
+        }
+      else
+        {
+          n *= 2;
+          retval.resize(n);
+        }
+    }
+  return (found ? retval : "");
+}
+
+static void
+set_dll_directory (const std::string& dir = "")
+{
+  typedef BOOL (WINAPI *dllfcn_t) (LPCTSTR path);
+
+  static dllfcn_t dllfcn = NULL;
+  static bool first = true;
+
+  if (! dllfcn && first)
+    {
+      HINSTANCE hKernel32 = GetModuleHandle ("kernel32");
+      dllfcn = reinterpret_cast<dllfcn_t> (GetProcAddress (hKernel32, "SetDllDirectoryA"));
+      first = false;
+    }
+
+  if (dllfcn)
+    dllfcn (dir.empty () ? NULL : dir.c_str ());
+}
+#endif
+
+static std::string
+initial_java_dir (void)
+{
+  static std::string java_dir;
+
+  if (java_dir.empty ())
+    {
+      java_dir = octave_env::getenv ("OCTAVE_JAVA_DIR");
+
+      if (java_dir.empty ())
+        java_dir = Vfcn_file_dir + file_ops::dir_sep_str () + "java";
+    }
+
+  return java_dir;
+}
+
+// Read the content of a file filename (usually "classpath.txt")
+//
+// Returns a string with all lines concatenated and separated
+// by the path separator character.
+// The return string also starts with a path separator so that
+// it can be appended easily to a base classpath.
+//
+// The file "classpath.txt" must contain single lines, each
+// with a classpath.
+// Comment lines starting with a '#' or a '%' in column 1 are allowed.
+
+static std::string
+read_classpath_txt (const std::string& filepath)
+{
+  std::string classpath;
+
+  std::ifstream fs (filepath.c_str ());
+
+  if (! fs.bad () && ! fs.fail ())
+    {
+      std::string line;
+
+      while (! fs.eof () && ! fs.fail ())
+        {
+          std::getline (fs, line);
+
+          if (line.length () > 1)
+            {
+              if (line.at(0) == '#' || line.at(0) == '%')
+                ; // skip comments
+              else
+                {
+                  // prepend separator character
+                  classpath.append (dir_path::path_sep_str ());
+
+                  // append content of line without trailing blanks
+                  int iLast = line.find_last_not_of (' ');
+
+                  classpath.append (file_ops::tilde_expand (line.substr (0, iLast+1)));
+                }
+            }
+        }
+    }
+
+  return (classpath);
+}
+
+
+static std::string
+initial_class_path (void)
+{
+  std::string java_dir = initial_java_dir ();
+
+  std::string retval = java_dir;
+
+  // find octave.jar file
+  if (! retval.empty ())
+    {
+      std::string sep = file_ops::dir_sep_str ();
+
+      std::string jar_file = java_dir + sep + "octave.jar";
+
+      file_stat jar_exists (jar_file);
+
+      if (jar_exists)
+        {
+          // initialize static classpath to octave.jar
+          retval = jar_file;
+
+          // The base classpath has been set.  Try to find the optional
+          // file "classpath.txt" in two places.  The users classes will
+          // take precedence over the settings defined in the package
+          // directory
+
+          std::string str_filename = "classpath.txt";
+          std::string cp_file;
+          file_stat   cp_exists;
+
+          // Try to read the file "classpath.txt" in the user's home
+          // directory.
+
+          std::string home_dir = "~" + sep + str_filename;
+          cp_file = file_ops::tilde_expand (home_dir);
+          cp_exists = file_stat (cp_file);
+          if (cp_exists)
+            {
+              // The file "classpath.txt" has been found: add its
+              // contents to the static classpath.
+
+              std::string theClassPath = read_classpath_txt (cp_file);
+              retval.append (theClassPath);
+            }
+
+          // Try to read a file "classpath.txt" in the package directory.
+
+          cp_file = java_dir + sep + str_filename;
+          cp_exists = file_stat (cp_file);
+          if (cp_exists)
+            {
+              // The file "classpath.txt" has been found: add its
+              // contents to the static classpath.
+
+              std::string theClassPath = read_classpath_txt (cp_file);
+              retval.append (theClassPath);
+            }
+        }
+      else
+        throw std::string ("octave jar does not exist: ") + jar_file;
+    }
+  else
+    throw std::string ("initial java dir is empty");
+
+  return retval;
+}
+
+static void
+initialize_jvm (void)
+{
+  JNIEnv *current_env;
+
+  if (jvm)
+    return;
+
+  const char *static_locale = setlocale (LC_ALL, NULL);
+  const std::string locale (static_locale);
+
+#if defined (__WIN32__)
+
+  HMODULE hMod = GetModuleHandle ("jvm.dll");
+  std::string jvm_lib_path;
+  std::string old_cwd;
+
+  if (hMod == NULL)
+    {
+      // In windows, find the location of the JRE from the registry
+      // and load the symbol from the dll.
+      std::string key, value;
+
+      key = "software\\javasoft\\java runtime environment";
+
+      value = octave_env::getenv ("JAVA_VERSION");
+      if (value.empty ())
+        {
+          value = "Currentversion";
+          std::string regval = read_registry_string (key,value);
+
+          if (regval.empty ())
+            throw std::string ("unable to find Java Runtime Environment: ") + key + "::" + value;
+          value = regval;
+        }
+
+      key = key + "\\" + value;
+      value = "RuntimeLib";
+      jvm_lib_path = read_registry_string (key, value);
+      if (jvm_lib_path.empty ())
+        throw std::string ("unable to find Java Runtime Environment: ") + key + "::" + value;
+
+      std::string jvm_bin_path;
+
+      value = "JavaHome";
+      jvm_bin_path = read_registry_string (key, value);
+      if (! jvm_bin_path.empty ())
+        {
+          jvm_bin_path = (jvm_bin_path + std::string ("\\bin"));
+
+          old_cwd = octave_env::get_current_directory ();
+
+          set_dll_directory (jvm_bin_path);
+          octave_env::chdir (jvm_bin_path);
+        }
+    }
+  else
+    {
+      // JVM seems to be already loaded, better to use that DLL instead
+      // of looking in the registry, to avoid opening a different JVM.
+      jvm_lib_path = get_module_filename (hMod);
+
+      if (jvm_lib_path.empty ())
+        throw std::string ("unable to find Java Runtime Environment");
+    }
+
+#else
+
+  std::string jvm_lib_path = JAVA_HOME + std::string ("/jre/lib/") + JAVA_ARCH + "/server/libjvm.so";
+
+#endif
+
+  jsize nVMs = 0;
+
+# if !defined (__APPLE__) && !defined (__MACH__)
+
+  octave_shlib lib (jvm_lib_path);
+
+  if (!lib)
+    throw std::string ("unable to load Java Runtime Environment from ") + jvm_lib_path;
+
+#if defined (__WIN32__)
+
+  set_dll_directory ();
+
+  if (! old_cwd.empty ())
+    octave_env::chdir (old_cwd);
+
+#endif
+
+  JNI_CreateJavaVM_t create_vm = reinterpret_cast<JNI_CreateJavaVM_t> (lib.search ("JNI_CreateJavaVM"));
+  JNI_GetCreatedJavaVMs_t get_vm = reinterpret_cast<JNI_GetCreatedJavaVMs_t> (lib.search ("JNI_GetCreatedJavaVMs"));
+
+  if (!create_vm)
+    throw std::string ("unable to find JNI_CreateJavaVM in ") + jvm_lib_path;
+
+  if (!get_vm)
+    throw std::string ("unable to find JNI_GetCreatedJavaVMs in ") + jvm_lib_path;
+
+  if (get_vm (&jvm, 1, &nVMs) == 0 && nVMs > 0)
+
+#else
+
+  // FIXME: There exists a problem on the Mac platform that
+  //   octave_shlib lib (jvm_lib_path)
+  // doesn't work with 'not-bundled' *.oct files.
+
+  if (JNI_GetCreatedJavaVMs (&jvm, 1, &nVMs) == 0 && nVMs > 0)
+
+#endif
+
+    {
+      // At least one JVM exists, try to attach to it
+
+      switch (jvm->GetEnv (reinterpret_cast<void **> (&current_env), JNI_VERSION_1_2))
+        {
+        case JNI_EDETACHED:
+          // Attach the current thread
+          JavaVMAttachArgs vm_args;
+          vm_args.version = JNI_VERSION_1_2;
+          vm_args.name = const_cast<char *> ("octave");
+          vm_args.group = NULL;
+          if (jvm->AttachCurrentThread (reinterpret_cast<void **> (&current_env), &vm_args) < 0)
+            throw std::string ("JVM internal error, unable to attach octave to existing JVM");
+          break;
+
+        case JNI_EVERSION:
+          throw std::string ("JVM internal error, the required JNI version is not supported");
+          break;
+
+        case JNI_OK:
+          // Don't do anything, the current thread is already attached to JVM
+          break;
+        }
+
+      jvm_attached = true;
+      //printf ("JVM attached\n");
+    }
+  else
+    {
+      // No JVM exists, create one
+
+      JVMArgs vm_args;
+
+      vm_args.add ("-Djava.class.path=" + initial_class_path ());
+      vm_args.add ("-Xrs");
+      vm_args.add ("-Djava.system.class.loader=org.octave.OctClassLoader");
+      vm_args.read_java_opts (initial_java_dir () + file_ops::dir_sep_str () + "java.opts");
+
+# if !defined (__APPLE__) && !defined (__MACH__)
+
+      if (create_vm (&jvm, &current_env, vm_args.to_args ()) != JNI_OK)
+        throw std::string ("unable to start Java VM in ")+jvm_lib_path;
+      //printf ("JVM created\n");
+    }
+
+  jvm_lib = lib;
+
+#else
+
+      if (JNI_CreateJavaVM (&jvm, reinterpret_cast<void **> (&current_env),
+                            vm_args.to_args ()) != JNI_OK)
+        throw std::string ("unable to start Java VM in ")+jvm_lib_path;
+
+    }
+
+#endif
+
+  setlocale (LC_ALL, locale.c_str ());
+}
+
+static void
+terminate_jvm (void)
+{
+  if (jvm)
+    {
+      if (jvm_attached)
+        jvm->DetachCurrentThread ();
+      else
+        jvm->DestroyJavaVM ();
+
+      jvm = 0;
+      jvm_attached = false;
+
+      if (jvm_lib)
+        jvm_lib.close ();
+    }
+}
+
+std::string
+jstring_to_string (JNIEnv* jni_env, jstring s)
+{
+  std::string retval;
+
+  if (jni_env)
+    {
+      const char *cstr = jni_env->GetStringUTFChars (s, 0);
+      retval = cstr;
+      jni_env->ReleaseStringUTFChars (s, cstr);
+    }
+
+  return retval;
+}
+
+std::string
+jstring_to_string (JNIEnv* jni_env, jobject obj)
+{
+  std::string retval;
+
+  if (jni_env && obj)
+    {
+      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/String"));
+      if (cls)
+        {
+          if (jni_env->IsInstanceOf (obj, cls))
+            retval = jstring_to_string (jni_env, reinterpret_cast<jstring> (obj));
+        }
+    }
+
+  return retval;
+}
+
+static octave_value
+check_exception (JNIEnv* jni_env)
+{
+  octave_value retval;
+
+  jthrowable_ref ex (jni_env, jni_env->ExceptionOccurred ());
+
+  if (ex)
+    {
+      if (Vjava_debug)
+        jni_env->ExceptionDescribe ();
+
+      jni_env->ExceptionClear ();
+
+      jclass_ref jcls (jni_env, jni_env->GetObjectClass (ex));
+      jmethodID mID = jni_env->GetMethodID (jcls, "toString", "()Ljava/lang/String;");
+      jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (ex, mID)));
+      std::string msg = jstring_to_string (jni_env, js);
+
+      error ("[java] %s", msg.c_str ());
+    }
+  else
+    retval = Matrix ();
+
+  return retval;
+}
+
+static jclass
+find_octave_class (JNIEnv *jni_env, const char *name)
+{
+  static std::string class_loader;
+  static jclass uiClass = 0;
+
+  jclass jcls = jni_env->FindClass (name);
+
+  if (jcls == 0)
+    {
+      jni_env->ExceptionClear ();
+
+      if (! uiClass)
+        {
+          if (class_loader.empty ())
+            {
+              jclass_ref syscls (jni_env, jni_env->FindClass ("java/lang/System"));
+              jmethodID mID = jni_env->GetStaticMethodID (syscls, "getProperty", "(Ljava/lang/String;)Ljava/lang/String;");
+              jstring_ref js (jni_env, jni_env->NewStringUTF ("octave.class.loader"));
+              js = reinterpret_cast<jstring> (jni_env->CallStaticObjectMethod (syscls, mID, jstring (js)));
+              class_loader = jstring_to_string (jni_env, jstring (js));
+              std::replace (class_loader.begin (), class_loader.end (), '.', '/');
+            }
+
+          jclass_ref uicls (jni_env, jni_env->FindClass (class_loader.c_str ()));
+
+          if (! uicls)
+            {
+              jni_env->ExceptionClear ();
+
+              /* Try the netbeans way */
+              std::replace (class_loader.begin (), class_loader.end (), '/', '.');
+              jclass_ref jcls2 (jni_env, jni_env->FindClass ("org/openide/util/Lookup"));
+              jmethodID mID = jni_env->GetStaticMethodID (jcls2, "getDefault", "()Lorg/openide/util/Lookup;");
+              jobject_ref lObj (jni_env, jni_env->CallStaticObjectMethod (jcls2, mID));
+              mID = jni_env->GetMethodID (jcls2, "lookup", "(Ljava/lang/Class;)Ljava/lang/Object;");
+              jclass_ref cLoaderCls (jni_env, jni_env->FindClass ("java/lang/ClassLoader"));
+              jobject_ref cLoader (jni_env, jni_env->CallObjectMethod (lObj, mID, jclass (cLoaderCls)));
+              mID = jni_env->GetMethodID (cLoaderCls, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
+              jstring_ref js (jni_env, jni_env->NewStringUTF (class_loader.c_str ()));
+              uicls = reinterpret_cast<jclass> (jni_env->CallObjectMethod (cLoader, mID, jstring (js)));
+            }
+
+          if (uicls)
+            uiClass = reinterpret_cast<jclass> (jni_env->NewGlobalRef (jclass (uicls)));
+        }
+
+      if (uiClass)
+        {
+          jmethodID mID = jni_env->GetStaticMethodID (uiClass, "findClass", "(Ljava/lang/String;)Ljava/lang/Class;");
+          jstring_ref js (jni_env, jni_env->NewStringUTF (name));
+          jcls = reinterpret_cast<jclass> (jni_env->CallStaticObjectMethod (uiClass, mID, jstring (js)));
+        }
+    }
+
+  return jcls;
+}
+
+static dim_vector
+compute_array_dimensions (JNIEnv* jni_env, jobject obj)
+{
+  jobjectArray_ref jobj (jni_env, reinterpret_cast<jobjectArray> (obj));
+  jclass_ref jcls (jni_env, jni_env->GetObjectClass (obj));
+  jclass_ref ccls (jni_env, jni_env->GetObjectClass (jcls));
+  jmethodID isArray_ID = jni_env->GetMethodID (ccls, "isArray", "()Z"),
+            getComponentType_ID = jni_env->GetMethodID (ccls, "getComponentType", "()Ljava/lang/Class;");
+
+  dim_vector dv (1, 1);
+  int idx = 0;
+
+  jobj.detach ();
+  while (jcls && jni_env->CallBooleanMethod (jcls, isArray_ID))
+    {
+      int len = (jobj ? jni_env->GetArrayLength (jobj) : 0);
+      if (idx >= dv.length ())
+        dv.resize (idx+1);
+      dv(idx) = len;
+      jcls = reinterpret_cast<jclass> (jni_env->CallObjectMethod (jcls, getComponentType_ID));
+      jobj = (len > 0 ? reinterpret_cast<jobjectArray> (jni_env->GetObjectArrayElement (jobj, 0)) : 0);
+      idx++;
+    }
+
+  return dv;
+}
+
+static jobject
+make_java_index (JNIEnv* jni_env, const octave_value_list& idx)
+{
+  jclass_ref ocls (jni_env, jni_env->FindClass ("[I"));
+  jobjectArray retval = jni_env->NewObjectArray (idx.length (), ocls, 0);
+
+  for (int i = 0; i < idx.length (); i++)
+    {
+      idx_vector v = idx(i).index_vector ();
+
+      if (! error_state)
+        {
+          jintArray_ref i_array (jni_env, jni_env->NewIntArray (v.length ()));
+          jint *buf = jni_env->GetIntArrayElements (i_array, 0);
+
+          for (int k = 0; k < v.length (); k++)
+            buf[k] = v(k);
+
+          jni_env->ReleaseIntArrayElements (i_array, buf, 0);
+          jni_env->SetObjectArrayElement (retval, i, i_array);
+
+          check_exception (jni_env);
+
+          if (error_state)
+            break;
+        }
+      else
+        break;
+    }
+
+  return retval;
+}
+
+static octave_value
+get_array_elements (JNIEnv* jni_env, jobject jobj,
+                    const octave_value_list& idx)
+{
+  octave_value retval;
+  jobject_ref resObj (jni_env);
+  jobject_ref java_idx (jni_env, make_java_index (jni_env, idx));
+
+  if (! error_state)
+    {
+      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "arraySubsref", "(Ljava/lang/Object;[[I)Ljava/lang/Object;");
+      resObj = jni_env->CallStaticObjectMethod (helperClass, mID, jobj, jobject (java_idx));
+    }
+
+  if (resObj)
+    retval = box (jni_env, resObj);
+  else
+    retval = check_exception (jni_env);
+
+  return retval;
+}
+
+static octave_value
+set_array_elements (JNIEnv* jni_env, jobject jobj,
+                    const octave_value_list& idx, const octave_value& rhs)
+{
+  octave_value retval;
+
+  jclass_ref rhsCls (jni_env);
+  jobject_ref resObj (jni_env), rhsObj (jni_env);
+  jobject_ref java_idx (jni_env, make_java_index (jni_env, idx));
+
+  if (! error_state && unbox (jni_env, rhs, rhsObj, rhsCls))
+    {
+      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "arraySubsasgn",
+          "(Ljava/lang/Object;[[ILjava/lang/Object;)Ljava/lang/Object;");
+      resObj = jni_env->CallStaticObjectMethod (helperClass, mID,
+          jobj, jobject (java_idx), jobject (rhsObj));
+    }
+
+  if (resObj)
+    retval = box (jni_env, resObj);
+  else
+    retval = check_exception (jni_env);
+
+  return retval;
+}
+
+static string_vector
+get_invoke_list (JNIEnv* jni_env, jobject jobj)
+{
+  std::list<std::string> name_list;
+
+  if (jni_env)
+    {
+      jclass_ref cls (jni_env, jni_env->GetObjectClass (jobj));
+      jclass_ref ccls (jni_env, jni_env->GetObjectClass (cls));
+      jmethodID getMethods_ID = jni_env->GetMethodID (ccls, "getMethods", "()[Ljava/lang/reflect/Method;"),
+        getFields_ID = jni_env->GetMethodID (ccls, "getFields", "()[Ljava/lang/reflect/Field;");
+      jobjectArray_ref mList (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallObjectMethod (cls, getMethods_ID))),
+        fList (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallObjectMethod (cls, getFields_ID)));
+      int mLen = jni_env->GetArrayLength (mList), fLen = jni_env->GetArrayLength (fList);
+      jclass_ref mCls (jni_env, jni_env->FindClass ("java/lang/reflect/Method")),
+        fCls (jni_env, jni_env->FindClass ("java/lang/reflect/Field"));
+      jmethodID m_getName_ID = jni_env->GetMethodID (mCls, "getName", "()Ljava/lang/String;"),
+        f_getName_ID = jni_env->GetMethodID (fCls, "getName", "()Ljava/lang/String;");
+
+      for (int i = 0; i < mLen; i++)
+        {
+          jobject_ref meth (jni_env, jni_env->GetObjectArrayElement (mList, i));
+          jstring_ref methName (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (meth, m_getName_ID)));
+          name_list.push_back (jstring_to_string (jni_env, methName));
+        }
+
+      for (int i = 0; i < fLen; i++)
+        {
+          jobject_ref field (jni_env, jni_env->GetObjectArrayElement (fList, i));
+          jstring_ref fieldName (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (field, f_getName_ID)));
+          name_list.push_back (jstring_to_string (jni_env, fieldName));
+        }
+    }
+
+  string_vector v (name_list);
+
+  return v.sort (true);
+}
+
+static octave_value
+convert_to_string (JNIEnv *jni_env, jobject java_object, bool force, char type)
+{
+  octave_value retval;
+
+  if (jni_env && java_object)
+    {
+      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/String"));
+
+      if (jni_env->IsInstanceOf (java_object, cls))
+        retval = octave_value (jstring_to_string (jni_env, java_object), type);
+      else if (force)
+        {
+          cls = jni_env->FindClass ("[Ljava/lang/String;");
+
+          if (jni_env->IsInstanceOf (java_object, cls))
+            {
+              jobjectArray array = reinterpret_cast<jobjectArray> (java_object);
+              int len = jni_env->GetArrayLength (array);
+              Cell c (len, 1);
+
+              for (int i = 0; i < len; i++)
+                {
+                  jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->GetObjectArrayElement (array, i)));
+
+                  if (js)
+                    c(i) = octave_value (jstring_to_string (jni_env, js), type);
+                  else
+                    {
+                      c(i) = check_exception (jni_env);
+
+                      if (error_state)
+                        break;
+                    }
+                }
+
+              retval = octave_value (c);
+            }
+          else
+            {
+              cls = jni_env->FindClass ("java/lang/Object");
+              jmethodID mID = jni_env->GetMethodID (cls, "toString", "()Ljava/lang/String;");
+              jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (java_object, mID)));
+
+              if (js)
+                retval = octave_value (jstring_to_string (jni_env, js), type);
+              else
+                retval = check_exception (jni_env);
+            }
+        }
+      else
+        error ("unable to convert Java object to string");
+    }
+
+  return retval;
+}
+
+#define TO_JAVA(obj) dynamic_cast<octave_java*> ((obj).internal_rep ())
+
+octave_value
+box (JNIEnv* jni_env, jobject jobj, jclass jcls)
+{
+  octave_value retval;
+  jclass_ref cls (jni_env);
+
+  if (! jobj)
+    retval = Matrix ();
+
+  if (retval.is_undefined ())
+    {
+      cls = jni_env->FindClass ("java/lang/Integer");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          jmethodID m = jni_env->GetMethodID (cls, "intValue", "()I");
+          retval = jni_env->CallIntMethod (jobj, m);
+        }
+    }
+
+  if (retval.is_undefined ())
+    {
+      cls = jni_env->FindClass ("java/lang/Double");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          jmethodID m = jni_env->GetMethodID (cls, "doubleValue", "()D");
+          retval = jni_env->CallDoubleMethod (jobj, m);
+        }
+    }
+
+  if (retval.is_undefined ())
+    {
+      cls = jni_env->FindClass ("java/lang/Boolean");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          jmethodID m = jni_env->GetMethodID (cls, "booleanValue", "()Z");
+          // MH retval = jni_env->CallBooleanMethod (jobj, m);
+          retval = (jni_env->CallBooleanMethod (jobj, m) ? true : false);
+        }
+    }
+
+  if (retval.is_undefined ())
+    {
+      cls = jni_env->FindClass ("java/lang/String");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          retval = jstring_to_string (jni_env, jobj);
+        }
+    }
+
+  if (retval.is_undefined () && Vjava_convert_matrix)
+    {
+      cls = find_octave_class (jni_env, "org/octave/Matrix");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          jmethodID mID = jni_env->GetMethodID (cls, "getDims", "()[I");
+          jintArray_ref iv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
+          jint *iv_data = jni_env->GetIntArrayElements (jintArray (iv), 0);
+          dim_vector dims;
+          dims.resize (jni_env->GetArrayLength (jintArray (iv)));
+
+          for (int i = 0; i < dims.length (); i++)
+            dims(i) = iv_data[i];
+
+          jni_env->ReleaseIntArrayElements (jintArray (iv), iv_data, 0);
+          mID = jni_env->GetMethodID (cls, "getClassName", "()Ljava/lang/String;");
+          jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->CallObjectMethod (jobj, mID)));
+
+          std::string s = jstring_to_string (jni_env, js);
+
+          if (s == "double")
+            {
+              NDArray m (dims);
+              mID = jni_env->GetMethodID (cls, "toDouble", "()[D");
+              jdoubleArray_ref dv (jni_env, reinterpret_cast<jdoubleArray> (jni_env->CallObjectMethod (jobj, mID)));
+              jni_env->GetDoubleArrayRegion (dv, 0, m.length (), m.fortran_vec ());
+              retval = m;
+            }
+          else if (s == "byte")
+            {
+              if (Vjava_unsigned_conversion)
+                {
+                  uint8NDArray m (dims);
+                  mID = jni_env->GetMethodID (cls, "toByte", "()[B");
+                  jbyteArray_ref dv (jni_env, reinterpret_cast<jbyteArray> (jni_env->CallObjectMethod (jobj, mID)));
+                  jni_env->GetByteArrayRegion (dv, 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
+                  retval = m;
+                }
+              else
+                {
+                  int8NDArray m (dims);
+                  mID = jni_env->GetMethodID (cls, "toByte", "()[B");
+                  jbyteArray_ref dv (jni_env, reinterpret_cast<jbyteArray> (jni_env->CallObjectMethod (jobj, mID)));
+                  jni_env->GetByteArrayRegion (dv, 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
+                  retval = m;
+                }
+            }
+          else if (s == "integer")
+            {
+              if (Vjava_unsigned_conversion)
+                {
+                  uint32NDArray m (dims);
+                  mID = jni_env->GetMethodID (cls, "toInt", "()[I");
+                  jintArray_ref dv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
+                  jni_env->GetIntArrayRegion (dv, 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
+                  retval = m;
+                }
+              else
+                {
+                  int32NDArray m (dims);
+                  mID = jni_env->GetMethodID (cls, "toInt", "()[I");
+                  jintArray_ref dv (jni_env, reinterpret_cast<jintArray> (jni_env->CallObjectMethod (jobj, mID)));
+                  jni_env->GetIntArrayRegion (dv, 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
+                  retval = m;
+                }
+            }
+        }
+    }
+
+  if (retval.is_undefined ())
+    {
+      cls = find_octave_class (jni_env, "org/octave/OctaveReference");
+
+      if (jni_env->IsInstanceOf (jobj, cls))
+        {
+          jmethodID mID = jni_env->GetMethodID (cls, "getID", "()I");
+          int ID = jni_env->CallIntMethod (jobj, mID);
+          std::map<int,octave_value>::iterator it = octave_ref_map.find (ID);
+
+          if (it != octave_ref_map.end ())
+            retval = it->second;
+        }
+    }
+
+  if (retval.is_undefined ())
+    retval = octave_value (new octave_java (jobj, jcls));
+
+  return retval;
+}
+
+octave_value
+box_more (JNIEnv* jni_env, jobject jobj, jclass jcls)
+{
+  octave_value retval = box (jni_env, jobj, jcls);
+
+  if (retval.class_name () == "octave_java")
+    {
+      retval = octave_value ();
+
+      jclass_ref cls (jni_env);
+
+      if (retval.is_undefined ())
+        {
+          cls = jni_env->FindClass ("[D");
+
+          if (jni_env->IsInstanceOf (jobj, cls))
+            {
+              jdoubleArray jarr = reinterpret_cast<jdoubleArray> (jobj);
+              int len = jni_env->GetArrayLength (jarr);
+
+              if (len > 0)
+                {
+                  Matrix m (1, len);
+                  jni_env->GetDoubleArrayRegion (jarr, 0, len, m.fortran_vec ());
+                  retval = m;
+                }
+              else
+                retval = Matrix ();
+            }
+        }
+
+      if (retval.is_undefined ())
+        {
+          cls = jni_env->FindClass ("[[D");
+
+          if (jni_env->IsInstanceOf (jobj, cls))
+            {
+              jobjectArray jarr = reinterpret_cast<jobjectArray> (jobj);
+              int rows = jni_env->GetArrayLength (jarr), cols = 0;
+
+              if (rows > 0)
+                {
+                  Matrix m;
+
+                  for (int r = 0; r < rows; r++)
+                    {
+                      jdoubleArray_ref row (jni_env, reinterpret_cast<jdoubleArray> (jni_env->GetObjectArrayElement (jarr, r)));
+
+                      if (m.length () == 0)
+                        {
+                          cols = jni_env->GetArrayLength (row);
+                          m.resize (cols, rows);
+                        }
+                      jni_env->GetDoubleArrayRegion (row, 0, cols, m.fortran_vec () + r * cols);
+                    }
+                  retval = m.transpose ();
+                }
+              else
+                retval = Matrix ();
+            }
+        }
+
+      if (retval.is_undefined ())
+        {
+          cls = jni_env->FindClass ("[Ljava/lang/String;");
+
+          if (jni_env->IsInstanceOf (jobj, cls))
+            {
+              jobjectArray jarr = reinterpret_cast<jobjectArray> (jobj);
+              int len = jni_env->GetArrayLength (jarr);
+              Cell m (len, 1);
+
+              for (int i = 0; i < len; i++)
+                {
+                  jstring_ref js (jni_env, reinterpret_cast<jstring> (jni_env->GetObjectArrayElement (jarr, i)));
+                  m(i) = jstring_to_string (jni_env, js);
+                }
+
+              retval = m;
+            }
+        }
+    }
+
+  if (retval.is_undefined ())
+    retval = octave_value (new octave_java (jobj, jcls));
+
+  return retval;
+}
+
+int
+unbox (JNIEnv* jni_env, const octave_value& val, jobject_ref& jobj,
+       jclass_ref& jcls)
+{
+  int found = 1;
+
+  if (val.class_name () == "octave_java")
+    {
+      octave_java *ovj = TO_JAVA (val);
+      jobj = ovj->to_java ();
+      jobj.detach ();
+      jcls = jni_env->GetObjectClass (jobj);
+    }
+  else if (val.is_string ())
+    {
+      std::string s = val.string_value ();
+
+      jobj = jni_env->NewStringUTF (s.c_str ());
+      jcls = jni_env->GetObjectClass (jobj);
+    }
+  else if (val.is_bool_scalar ())
+   {
+      bool bval = val.bool_value ();
+      jclass_ref bcls (jni_env, jni_env->FindClass ("java/lang/Boolean"));
+      jfieldID fid = jni_env->GetStaticFieldID (bcls, "TYPE", "Ljava/lang/Class;");
+      jmethodID mid = jni_env->GetMethodID (bcls, "<init>", "(Z)V");
+      jcls = reinterpret_cast<jclass> (jni_env->GetStaticObjectField (bcls, fid));
+      jobj = jni_env->NewObject (bcls, mid, bval);
+   }
+  else if (val.is_real_scalar ())
+    {
+      double dval = val.double_value ();
+      jclass_ref dcls (jni_env, jni_env->FindClass ("java/lang/Double"));
+      jfieldID fid = jni_env->GetStaticFieldID (dcls, "TYPE", "Ljava/lang/Class;");
+      jmethodID mid = jni_env->GetMethodID (dcls, "<init>", "(D)V");
+      jcls = reinterpret_cast<jclass> (jni_env->GetStaticObjectField (dcls, fid));
+      jobj = jni_env->NewObject (dcls, mid, dval);
+    }
+  else if (val.is_empty ())
+    {
+      jobj = 0;
+      //jcls = jni_env->FindClass ("java/lang/Object");
+      jcls = 0;
+    }
+  else if (!Vjava_convert_matrix
+           && ((val.is_real_matrix ()
+                && (val.rows () == 1 || val.columns () == 1))
+               || val.is_range ()))
+    {
+      Matrix m = val.matrix_value ();
+      jdoubleArray dv = jni_env->NewDoubleArray (m.length ());
+      //for (int i = 0; i < m.length (); i++)
+        jni_env->SetDoubleArrayRegion (dv, 0, m.length (), m.fortran_vec ());
+      jobj = dv;
+      jcls = jni_env->GetObjectClass (jobj);
+    }
+  else if (Vjava_convert_matrix
+           && (val.is_matrix_type () || val.is_range ()) && val.is_real_type ())
+    {
+      jclass_ref mcls (jni_env, find_octave_class (jni_env, "org/octave/Matrix"));
+      dim_vector dims = val.dims ();
+      jintArray_ref iv (jni_env, jni_env->NewIntArray (dims.length ()));
+      jint *iv_data = jni_env->GetIntArrayElements (jintArray (iv), 0);
+
+      for (int i = 0; i < dims.length (); i++)
+        iv_data[i] = dims(i);
+
+      jni_env->ReleaseIntArrayElements (jintArray (iv), iv_data, 0);
+
+      if (val.is_double_type ())
+        {
+          NDArray m = val.array_value ();
+          jdoubleArray_ref dv (jni_env, jni_env->NewDoubleArray (m.length ()));
+          jni_env->SetDoubleArrayRegion (jdoubleArray (dv), 0, m.length (), m.fortran_vec ());
+          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([D[I)V");
+          jobj = jni_env->NewObject (jclass (mcls), mID, jdoubleArray (dv), jintArray (iv));
+          jcls = jni_env->GetObjectClass (jobj);
+        }
+      else if (val.is_int8_type ())
+        {
+          int8NDArray m = val.int8_array_value ();
+          jbyteArray_ref bv (jni_env, jni_env->NewByteArray (m.length ()));
+          jni_env->SetByteArrayRegion (jbyteArray (bv), 0, m.length (), reinterpret_cast <jbyte *> (m.fortran_vec ()));
+          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([B[I)V");
+          jobj = jni_env->NewObject (jclass (mcls), mID, jbyteArray (bv), jintArray (iv));
+          jcls = jni_env->GetObjectClass (jobj);
+        }
+      else if (val.is_uint8_type ())
+        {
+          uint8NDArray m = val.uint8_array_value ();
+          jbyteArray_ref bv (jni_env, jni_env->NewByteArray (m.length ()));
+          jni_env->SetByteArrayRegion (jbyteArray (bv), 0, m.length (), reinterpret_cast<jbyte *> (m.fortran_vec ()));
+          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([B[I)V");
+          jobj = jni_env->NewObject (jclass (mcls), mID, jbyteArray (bv), jintArray (iv));
+          jcls = jni_env->GetObjectClass (jobj);
+        }
+      else if (val.is_int32_type ())
+        {
+          int32NDArray m = val.int32_array_value ();
+          jintArray_ref v (jni_env, jni_env->NewIntArray (m.length ()));
+          jni_env->SetIntArrayRegion (jintArray (v), 0, m.length (), reinterpret_cast<jint *> (m.fortran_vec ()));
+          jmethodID mID = jni_env->GetMethodID (mcls, "<init>", "([I[I)V");
+          jobj = jni_env->NewObject (jclass (mcls), mID, jintArray (v), jintArray (iv));
+          jcls = jni_env->GetObjectClass (jobj);
+        }
+      else
+        {
+          found = 0;
+          error ("cannot convert matrix of type `%s'", val.class_name ().c_str ());
+        }
+    }
+  else if (val.is_cellstr ())
+    {
+      Cell cellStr = val.cell_value ();
+      jclass_ref scls (jni_env, jni_env->FindClass ("java/lang/String"));
+      jobjectArray array = jni_env->NewObjectArray (cellStr.length (), scls, 0);
+      for (int i = 0; i < cellStr.length (); i++)
+        {
+          jstring_ref jstr (jni_env, jni_env->NewStringUTF (cellStr(i).string_value().c_str ()));
+          jni_env->SetObjectArrayElement (array, i, jstr);
+        }
+      jobj = array;
+      jcls = jni_env->GetObjectClass (jobj);
+    }
+  else
+    {
+      jclass rcls = find_octave_class (jni_env, "org/octave/OctaveReference");
+      jmethodID mID = jni_env->GetMethodID (rcls, "<init>", "(I)V");
+      int ID = octave_java_refcount++;
+
+      jobj = jni_env->NewObject (rcls, mID, ID);
+      jcls = rcls;
+      octave_ref_map[ID] = val;
+    }
+
+  return found;
+}
+
+int
+unbox (JNIEnv* jni_env, const octave_value_list& args,
+       jobjectArray_ref& jobjs, jobjectArray_ref& jclss)
+{
+  int found = 1;
+
+  jclass_ref ocls (jni_env, jni_env->FindClass ("java/lang/Object"));
+  jclass_ref ccls (jni_env, jni_env->FindClass ("java/lang/Class"));
+
+  if (! jobjs)
+    jobjs = jni_env->NewObjectArray (args.length (), ocls, 0);
+
+  if (! jclss)
+    jclss = jni_env->NewObjectArray (args.length (), ccls, 0);
+
+  for (int i = 0; i < args.length (); i++)
+    {
+      jobject_ref jobj (jni_env);
+      jclass_ref jcls (jni_env);
+
+      if (! unbox (jni_env, args(i), jobj, jcls))
+        {
+          found = 0;
+          break;
+        }
+
+      jni_env->SetObjectArrayElement (jobjs, i, jobj);
+      jni_env->SetObjectArrayElement (jclss, i, jcls);
+    }
+
+  return found;
+}
+
+
+static long
+get_current_thread_ID (JNIEnv *jni_env)
+{
+  if (jni_env)
+    {
+      jclass_ref cls (jni_env, jni_env->FindClass ("java/lang/Thread"));
+      jmethodID mID = jni_env->GetStaticMethodID (cls, "currentThread", "()Ljava/lang/Thread;");
+      jobject_ref jthread (jni_env, jni_env->CallStaticObjectMethod (cls, mID));
+
+      if (jthread)
+        {
+          jclass_ref jth_cls (jni_env, jni_env->GetObjectClass (jthread));
+          mID = jni_env->GetMethodID (jth_cls, "getId", "()J");
+          long result = jni_env->CallLongMethod (jthread, mID);
+          //printf ("current java thread ID = %ld\n", result);
+          return result;
+        }
+    }
+
+  return -1;
+}
+
+static int
+java_event_hook (void)
+{
+  JNIEnv *current_env = octave_java::thread_jni_env ();
+
+  if (current_env)
+    {
+      jclass_ref cls (current_env, find_octave_class (current_env, "org/octave/Octave"));
+      jmethodID mID = current_env->GetStaticMethodID (cls, "checkPendingAction", "()V");
+      current_env->CallStaticVoidMethod (cls, mID);
+    }
+
+  return 0;
+}
+
+static void
+initialize_java (void)
+{
+  if (! jvm)
+    {
+      try
+        {
+          initialize_jvm ();
+
+          JNIEnv *current_env = octave_java::thread_jni_env ();
+
+          octave_java::register_type ();
+          command_editor::add_event_hook (java_event_hook);
+          octave_thread_ID = get_current_thread_ID (current_env);
+          //printf ("octave thread ID=%ld\n", octave_thread_ID);
+        }
+      catch (std::string msg)
+        {
+          error (msg.c_str ());
+        }
+    }
+}
+
+DEFUN (java_init, , ,
+  "-*- texinfo -*-\n\
+@deftypefn  {Loadable Function} {} java_init ()\n\
+Undocumented internal function.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  retval = 0;
+  initialize_java ();
+  if (! error_state)
+    retval = 1;
+
+  return retval;
+}
+
+DEFUN (java_exit, , ,
+  "-*- texinfo -*-\n\
+@deftypefn  {Loadable Function} {} java_exit ()\n\
+Undocumented internal function.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  terminate_jvm ();
+
+  return retval;
+}
+
+DEFUN (java_new, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{obj} =} java_new (@var{name}, @var{arg1}, ...)\n\
+Create a Java object of class @var{name}, by calling the class constructor with the\n\
+arguments @var{arg1}, ...\n\
+\n\
+@example\n\
+  x = java_new (\"java.lang.StringBuffer\", \"Initial string\")\n\
+@end example\n\
+\n\
+@seealso{java_invoke, java_get, java_set}\n\
+@end deftypefn")
+{
+  return _java_new (args);
+}
+
+DEFUN (javaObject, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{obj} =} javaObject (@var{name}, @var{arg1}, ...)\n\
+Create a Java object of class @var{name}, by calling the class constructor with the\n\
+arguments @var{arg1}, ...\n\
+The first example creates an unitialized object, \
+while the second example supplies an initializer argument.\n\
+\n\
+@example\n\
+  x = javaObject (\"java.lang.StringBuffer\")\n\
+  x = javaObject (\"java.lang.StringBuffer\", \"Initial string\")\n\
+@end example\n\
+\n\
+@seealso{java_invoke, java_new, java_get, java_set}\n\
+@end deftypefn")
+{
+  return _java_new (args);
+}
+
+// internally called from java_new and javaObject for backward compatibility
+static octave_value _java_new (const octave_value_list& args)
+{
+  octave_value retval;
+
+  initialize_java ();
+  if (! error_state)
+    {
+      JNIEnv *current_env = octave_java::thread_jni_env ();
+
+      if (args.length () > 0)
+        {
+          std::string name = args(0).string_value ();
+          if (! error_state)
+            {
+              octave_value_list tmp;
+              for (int i=1; i<args.length (); i++)
+                tmp(i-1) = args(i);
+              retval = octave_java::do_java_create (current_env, name, tmp);
+            }
+          else
+            error ("java_new: first argument must be a string");
+        }
+      else
+        print_usage ();
+    }
+
+  return retval;
+}
+
+DEFUN (java_invoke, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{ret} =} java_invoke (@var{obj}, @var{name}, @var{arg1}, ...)\n\
+Invoke the method @var{name} on the Java object @var{obj} with the arguments\n\
+@var{arg1}, ... For static methods, @var{obj} can be a string representing the\n\
+fully qualified name of the corresponding class. The function returns the result\n\
+of the method invocation.\n\
+\n\
+When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
+as a shortcut syntax. For instance, the two following statements are equivalent\n\
+\n\
+@example\n\
+  ret = java_invoke (x, \"method1\", 1.0, \"a string\")\n\
+  ret = x.method1 (1.0, \"a string\")\n\
+@end example\n\
+\n\
+@seealso{java_get, java_set, java_new}\n\
+@end deftypefn")
+{
+  return _java_invoke (args);
+}
+
+DEFUN (javaMethod, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{ret} =} javaMethod (@var{name}, @var{obj}, @var{arg1}, ...)\n\
+Invoke the method @var{name} on the Java object @var{obj} with the arguments\n\
+@var{arg1}, ... For static methods, @var{obj} can be a string representing the\n\
+fully qualified name of the corresponding class. The function returns the result\n\
+of the method invocation.\n\
+\n\
+When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
+as a shortcut syntax. For instance, the two following statements are equivalent\n\
+\n\
+@example\n\
+  ret = javaMethod (\"method1\", x, 1.0, \"a string\")\n\
+  ret = x.method1 (1.0, \"a string\")\n\
+@end example\n\
+\n\
+@seealso{java_get, java_set, java_new}\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  if (args.length () > 1)
+    {
+      // swap first two arguments
+      octave_value_list tmp;
+      tmp(0) = args(1);
+      tmp(1) = args(0);
+
+      // copy remaining arguments
+      for (int i=2; i<args.length (); i++)
+        tmp(i) = args(i);
+
+      retval = _java_invoke (tmp);
+    }
+  else
+    {
+      print_usage ();
+    }
+
+  return retval;
+}
+
+// internally called from java_invoke and javaMethod for backward
+// compatibility.
+
+static octave_value
+_java_invoke (const octave_value_list& args)
+{
+  octave_value retval;
+
+  initialize_java ();
+
+  if (! error_state)
+    {
+      JNIEnv *current_env = octave_java::thread_jni_env ();
+
+      if (args.length () > 1)
+        {
+          std::string name = args(1).string_value ();
+          if (! error_state)
+            {
+              octave_value_list tmp;
+              for (int i=2; i<args.length (); i++)
+                tmp(i-2) = args(i);
+
+              if (args(0).class_name () == "octave_java")
+                {
+                  octave_java *jobj = TO_JAVA (args(0));
+                  retval = jobj->do_java_invoke (current_env, name, tmp);
+                }
+              else if (args(0).is_string ())
+                {
+                  std::string cls = args(0).string_value ();
+                  retval = octave_java::do_java_invoke (current_env, cls, name, tmp);
+                }
+              else
+                error ("java_invoke: first argument must be a Java object or a string");
+            }
+          else
+            error ("java_invoke: second argument must be a string");
+        }
+      else
+        print_usage ();
+    }
+
+  return retval;
+}
+
+DEFUN (java_get, args, ,
+    "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{val} =} java_get (@var{obj}, @var{name})\n\
+Get the value of the field @var{name} of the Java object @var{obj}. For\n\
+static fields, @var{obj} can be a string representing the fully qualified\n\
+name of the corresponding class.\n\
+\n\
+When @var{obj} is a regular Java object, the structure-like indexing can be used\n\
+as a shortcut syntax. For instance, the two following statements are equivalent\n\
+\n\
+@example\n\
+  java_get (x, \"field1\")\n\
+  x.field1\n\
+@end example\n\
+\n\
+@seealso{java_set, java_invoke, java_new}\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  initialize_java ();
+
+  if (! error_state)
+    {
+      JNIEnv *current_env = octave_java::thread_jni_env ();
+
+      if (args.length () == 2)
+        {
+          std::string name = args(1).string_value ();
+          if (! error_state)
+            {
+              if (args(0).class_name () == "octave_java")
+                {
+                  octave_java *jobj = TO_JAVA (args(0));
+                  retval = jobj->do_java_get (current_env, name);
+                }
+              else if (args(0).is_string ())
+                {
+                  std::string cls = args(0).string_value ();
+                  retval = octave_java::do_java_get (current_env, cls, name);
+                }
+              else
+                error ("java_get: first argument must be a Java object or a string");
+            }
+          else
+            error ("java_get: second argument must be a string");
+        }
+      else
+        print_usage ();
+    }
+
+  return retval;
+}
+
+DEFUN (java_set, args, ,
+    "-*- texinfo -*-\n\
+@deftypefn {Loadable Function} {@var{obj} =} java_set (@var{obj}, @var{name}, @var{val})\n\
+Set the value of the field @var{name} of the Java object @var{obj} to @var{val}.\n\
+For static fields, @var{obj} can be a string representing the fully qualified named\n\
+of the corresponding Java class.\n\
+\n\
+When @var{obj} is a regular Java object, the structure-like indexing can be used as\n\
+a shortcut syntax. For instance, the two following statements are equivalent\n\
+\n\
+@example\n\
+  java_set (x, \"field1\", val)\n\
+  x.field1 = val\n\
+@end example\n\
+\n\
+@seealso{java_get, java_invoke, java_new}\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  initialize_java ();
+
+  if (! error_state)
+    {
+      JNIEnv *current_env = octave_java::thread_jni_env ();
+
+      if (args.length () == 3)
+        {
+          std::string name = args(1).string_value ();
+          if (! error_state)
+            {
+              if (args(0).class_name () == "octave_java")
+                {
+                  octave_java *jobj = TO_JAVA (args(0));
+                  retval = jobj->do_java_set (current_env, name, args(2));
+                }
+              else if (args(0).is_string ())
+                {
+                  std::string cls = args(0).string_value ();
+                  retval = octave_java::do_java_set (current_env, cls, name, args(2));
+                }
+              else
+                error ("java_set: first argument must be a Java object or a string");
+            }
+          else
+            error ("java_set: second argument must be a string");
+        }
+      else
+        print_usage ();
+    }
+
+  return retval;
+}
+
+DEFUN (java2mat, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn  {Loadable Function} {} java2mat (@var{obj})\n\
+Undocumented internal function.\n\
+@end deftypefn")
+{
+  octave_value_list retval;
+
+  initialize_java ();
+
+  if (! error_state)
+    {
+      JNIEnv *current_env = octave_java::thread_jni_env ();
+
+      if (args.length () == 1)
+        {
+          if (args(0).class_name () == "octave_java")
+            {
+              octave_java *jobj = TO_JAVA (args(0));
+              retval(0) = box_more (current_env, jobj->to_java (), 0);
+            }
+          else
+            retval(0) = args(0);
+        }
+      else
+        print_usage ();
+    }
+
+  return retval;
+}
+
+DEFUN (java_convert_matrix, args, nargout,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} java_convert_matrix ()\n\
+Query or set the internal variable that determines FIXME.\n\
+@end deftypefn")
+{
+  return SET_INTERNAL_VARIABLE (java_convert_matrix);
+}
+
+DEFUN (java_unsigned_conversion, args, nargout,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} java_unsigned_conversion ()\n\
+Query or set the internal variable that determines FIXME.\n\
+@end deftypefn")
+{
+  return SET_INTERNAL_VARIABLE (java_unsigned_conversion);
+}
+
+DEFUN (java_debug, args, nargout,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} java_debug ()\n\
+Query or set the internal variable that determines FIXME.\n\
+@end deftypefn")
+{
+  return SET_INTERNAL_VARIABLE (java_debug);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_org_octave_Octave_call (JNIEnv *env, jclass, jstring funcName,
+                             jobjectArray argin, jobjectArray argout)
+{
+  std::string fname = jstring_to_string (env, funcName);
+
+  int nargout = env->GetArrayLength (argout);
+  int nargin = env->GetArrayLength (argin);
+
+  octave_value_list varargin, varargout;
+
+  for (int i = 0; i < nargin; i++)
+    varargin(i) = box (env, env->GetObjectArrayElement (argin, i), 0);
+
+  varargout = feval (fname, varargin, nargout);
+
+  if (! error_state)
+    {
+      jobjectArray_ref out_objs (env, argout), out_clss (env);
+
+      out_objs.detach ();
+
+      if (unbox (env, varargout, out_objs, out_clss))
+        return true;
+    }
+
+  return false;
+}
+
+JNIEXPORT void JNICALL
+Java_org_octave_OctaveReference_doFinalize (JNIEnv *, jclass, jint ID)
+{
+  octave_ref_map.erase (ID);
+}
+
+JNIEXPORT void JNICALL
+Java_org_octave_Octave_doInvoke (JNIEnv *env, jclass, jint ID,
+                                 jobjectArray args)
+{
+  std::map<int,octave_value>::iterator it = octave_ref_map.find (ID);
+
+  if (it != octave_ref_map.end ())
+    {
+      octave_value val = it->second;
+      int len = env->GetArrayLength (args);
+      octave_value_list oct_args;
+
+      for (int i = 0; i < len; i++)
+        {
+          jobject_ref jobj (env, env->GetObjectArrayElement (args, i));
+          oct_args(i) = box (env, jobj, 0);
+
+          if (error_state)
+            break;
+        }
+
+      if (! error_state)
+        {
+          BEGIN_INTERRUPT_WITH_EXCEPTIONS;
+
+          if (val.is_function_handle ())
+            {
+              octave_function *fcn = val.function_value ();
+              feval (fcn, oct_args);
+            }
+          else if (val.is_cell () && val.length () > 0
+                   && (val.rows () == 1 || val.columns () == 1)
+                   && val.cell_value()(0).is_function_handle ())
+            {
+              Cell c = val.cell_value ();
+              octave_function *fcn = c(0).function_value ();
+
+              for (int i=1; i<c.length (); i++)
+                oct_args(len+i-1) = c(i);
+
+              if (! error_state)
+                feval (fcn, oct_args);
+            }
+          else
+            error ("trying to invoke non-invocable object");
+
+          END_INTERRUPT_WITH_EXCEPTIONS;
+        }
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_org_octave_Octave_doEvalString (JNIEnv *env, jclass, jstring cmd)
+{
+  std::string s = jstring_to_string (env, cmd);
+  int pstatus;
+  eval_string (s, false, pstatus, 0);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_org_octave_Octave_needThreadedInvokation (JNIEnv *env, jclass)
+{
+  return (get_current_thread_ID (env) != octave_thread_ID);
+}
+
+// octave_java class definition
+
+DEFINE_OCTAVE_ALLOCATOR (octave_java);
+
+DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_java, "octave_java", "octave_java");
+
+dim_vector
+octave_java::dims (void) const
+{
+  JNIEnv *current_env = thread_jni_env ();
+
+  if (current_env && java_object)
+    return compute_array_dimensions (current_env, java_object);
+  else
+    return dim_vector (1, 1);
+}
+
+JNIEnv *
+octave_java::thread_jni_env (void)
+{
+  JNIEnv *env = NULL;
+
+  if (jvm)
+    jvm->GetEnv (reinterpret_cast<void **> (&env), JNI_VERSION_1_2);
+
+  return env;
+}
+
+octave_value_list
+octave_java::subsref (const std::string& type,
+                      const std::list<octave_value_list>& idx, int nargout)
+{
+  octave_value_list retval;
+  int skip = 1;
+
+  JNIEnv *current_env = thread_jni_env ();
+
+  switch (type[0])
+    {
+    case '.':
+      if (type.length () > 1 && type[1] == '(')
+        {
+          octave_value_list ovl;
+          count++;
+          ovl(0) = octave_value (this);
+          ovl(1) = (idx.front ())(0);
+          std::list<octave_value_list>::const_iterator it = idx.begin ();
+          ovl.append (*++it);
+          retval = feval (std::string ("java_invoke"), ovl, 1);
+          skip++;
+        }
+      else
+        {
+          octave_value_list ovl;
+          count++;
+          ovl(0) = octave_value (this);
+          ovl(1) = (idx.front ())(0);
+          retval = feval (std::string ("java_get"), ovl, 1);
+        }
+      break;
+
+    case '(':
+      if (current_env)
+        retval = get_array_elements (current_env, to_java (), idx.front ());
+      break;
+
+    default:
+      error ("subsref: Java object cannot be indexed with %c", type[0]);
+      break;
+    }
+
+  if (idx.size () > 1 && type.length () > 1)
+    retval = retval(0).next_subsref (nargout, type, idx, skip);
+
+  return retval;
+}
+
+octave_value
+octave_java::subsasgn (const std::string& type,
+                       const std::list<octave_value_list>&idx,
+                       const octave_value &rhs)
+{
+  octave_value retval;
+
+  JNIEnv *current_env = thread_jni_env ();
+
+  switch (type[0])
+    {
+      case '.':
+        if (type.length () == 1)
+          {
+            // field assignment
+            octave_value_list ovl;
+            count++;
+            ovl(0) = octave_value (this);
+            ovl(1) = (idx.front ())(0);
+            ovl(2) = rhs;
+            feval ("java_set", ovl, 0);
+            if (! error_state)
+              {
+                count++;
+                retval = octave_value (this);
+              }
+          }
+        else if (type.length () > 2 && type[1] == '(')
+          {
+            std::list<octave_value_list> new_idx;
+            std::list<octave_value_list>::const_iterator it = idx.begin ();
+            new_idx.push_back (*it++);
+            new_idx.push_back (*it++);
+            octave_value_list u = subsref (type.substr (0, 2), new_idx, 1);
+            if (! error_state)
+              {
+                std::list<octave_value_list> next_idx (idx);
+                next_idx.erase (next_idx.begin ());
+                next_idx.erase (next_idx.begin ());
+                u(0).subsasgn (type.substr (2), next_idx, rhs);
+                if (! error_state)
+                  {
+                    count++;
+                    retval = octave_value (this);
+                  }
+              }
+          }
+        else if (type[1] == '.')
+          {
+            octave_value_list u = subsref (type.substr (0, 1), idx, 1);
+            if (! error_state)
+              {
+                std::list<octave_value_list> next_idx (idx);
+                next_idx.erase (next_idx.begin ());
+                u(0).subsasgn (type.substr (1), next_idx, rhs);
+                if (! error_state)
+                  {
+                    count++;
+                    retval = octave_value (this);
+                  }
+              }
+          }
+        else
+          error ("invalid indexing/assignment on Java object");
+        break;
+
+      case '(':
+        if (current_env)
+          {
+            set_array_elements (current_env, to_java (), idx.front (), rhs);
+            if (! error_state)
+              {
+                count++;
+                retval = octave_value (this);
+              }
+          }
+        break;
+
+      default:
+        error ("Java object cannot be indexed with %c", type[0]);
+        break;
+    }
+
+  return retval;
+}
+
+string_vector
+octave_java::map_keys (void) const
+{
+  JNIEnv *current_env = thread_jni_env ();
+
+  if (current_env)
+    return get_invoke_list (current_env, to_java ());
+  else
+    return string_vector ();
+}
+
+octave_value
+octave_java::convert_to_str_internal (bool, bool force, char type) const
+{
+  JNIEnv *current_env = thread_jni_env ();
+
+  if (current_env)
+    return convert_to_string (current_env, to_java (), force, type);
+  else
+    return octave_value ("");
+}
+
+octave_value
+octave_java::do_java_invoke (JNIEnv* jni_env, const std::string& name,
+                             const octave_value_list& args)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
+      if (unbox (jni_env, args, arg_objs, arg_types))
+        {
+          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeMethod",
+                                                      "(Ljava/lang/Object;Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
+          jstring_ref methName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+          jobjectArray_ref resObj (jni_env, reinterpret_cast<jobjectArray> (jni_env->CallStaticObjectMethod (helperClass, mID,
+                                                                                                             to_java (), jstring (methName), jobjectArray (arg_objs), jobjectArray (arg_types))));
+          if (resObj)
+            retval = box (jni_env, resObj);
+          else
+            retval = check_exception (jni_env);
+        }
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java:: do_java_invoke (JNIEnv* jni_env,
+                              const std::string& class_name,
+                              const std::string& name,
+                              const octave_value_list& args)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
+      if (unbox (jni_env, args, arg_objs, arg_types))
+        {
+          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeStaticMethod",
+                                                      "(Ljava/lang/String;Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
+          jstring_ref methName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+          jstring_ref clsName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
+          jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
+                                                                        jstring (clsName), jstring (methName), jobjectArray (arg_objs), jobjectArray (arg_types)));
+          if (resObj)
+            retval = box (jni_env, resObj);
+          else
+            retval = check_exception (jni_env);
+        }
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java::do_java_create (JNIEnv* jni_env, const std::string& name,
+                             const octave_value_list& args)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jobjectArray_ref arg_objs (jni_env), arg_types (jni_env);
+
+      if (unbox (jni_env, args, arg_objs, arg_types))
+        {
+          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "invokeConstructor",
+                                                      "(Ljava/lang/String;[Ljava/lang/Object;[Ljava/lang/Class;)Ljava/lang/Object;");
+          jstring_ref clsName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+          jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
+                                                                        jstring (clsName), jobjectArray (arg_objs), jobjectArray (arg_types)));
+
+          if (resObj)
+            retval = box (jni_env, resObj);
+          else
+            check_exception (jni_env);
+        }
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java::do_java_get (JNIEnv* jni_env, const std::string& name)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "getField",
+          "(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;");
+      jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+      jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
+          to_java (), jstring (fName)));
+
+      if (resObj)
+        retval = box (jni_env, resObj);
+      else
+        retval = check_exception (jni_env);
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java::do_java_get (JNIEnv* jni_env, const std::string& class_name,
+                          const std::string& name)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+      jmethodID mID = jni_env->GetStaticMethodID (helperClass, "getStaticField",
+          "(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;");
+      jstring_ref cName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
+      jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+      jobject_ref resObj (jni_env, jni_env->CallStaticObjectMethod (helperClass, mID,
+          jstring (cName), jstring (fName)));
+      if (resObj)
+        retval = box (jni_env, resObj);
+      else
+        retval = check_exception (jni_env);
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java::do_java_set (JNIEnv* jni_env, const std::string& name,
+                          const octave_value& val)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jobject_ref jobj (jni_env);
+      jclass_ref jcls (jni_env);
+
+      if (unbox (jni_env, val, jobj, jcls))
+        {
+          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "setField",
+                                                      "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V");
+          jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+          jni_env->CallStaticObjectMethod (helperClass, mID, to_java (), jstring (fName), jobject (jobj));
+          check_exception (jni_env);
+        }
+    }
+
+  return retval;
+}
+
+octave_value
+octave_java::do_java_set (JNIEnv* jni_env, const std::string& class_name,
+                          const std::string& name, const octave_value& val)
+{
+  octave_value retval;
+
+  if (jni_env)
+    {
+      jobject_ref jobj (jni_env);
+      jclass_ref jcls (jni_env);
+
+      if (unbox (jni_env, val, jobj, jcls))
+        {
+          jclass_ref helperClass (jni_env, find_octave_class (jni_env, "org/octave/ClassHelper"));
+          jmethodID mID = jni_env->GetStaticMethodID (helperClass, "setStaticField",
+                                                      "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;)V");
+          jstring_ref cName (jni_env, jni_env->NewStringUTF (class_name.c_str ()));
+          jstring_ref fName (jni_env, jni_env->NewStringUTF (name.c_str ()));
+          jni_env->CallStaticObjectMethod (helperClass, mID, jstring (cName), jstring (fName), jobject (jobj));
+          check_exception (jni_env);
+        }
+    }
+
+  return retval;
+}
+
+#endif
+
diff -r 72968fb32c82 -r f96faf028d90 libinterp/octave-value/ov-java.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/octave-value/ov-java.h	Sat Dec 08 00:23:13 2012 -0500
@@ -0,0 +1,324 @@
+/*
+
+Copyright (C) 2007 Michael Goffioul
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#if !defined (octave_java_h)
+#define octave_java_h 1
+
+#include <jni.h>
+
+#include <oct-obj.h>
+#include <ov.h>
+
+#ifdef JAVAPKG_BUILD
+# define JAVAPKG_API OCTAVE_EXPORT
+#else
+# define JAVAPKG_API OCTAVE_IMPORT
+#endif
+
+template <class T>
+class java_local_ref
+{
+public:
+
+  java_local_ref (JNIEnv *_env)
+    : jobj (0), detached (false), env (_env) { }
+
+  java_local_ref (JNIEnv *_env, T obj)
+    : jobj (obj), detached (false), env (_env) { }
+
+  ~java_local_ref (void) { release (); }
+
+  T& operator= (T obj)
+  {
+    release ();
+    jobj = obj;
+    detached = false;
+    return jobj;
+  }
+
+  operator bool () const { return (jobj != 0); }
+  operator T () { return jobj; }
+
+  void detach (void) { detached = true; }
+
+private:
+
+  void release (void)
+  {
+    if (env && jobj && ! detached)
+      env->DeleteLocalRef (jobj);
+
+    jobj = 0;
+  }
+
+  java_local_ref (void)
+    : jobj (0), detached (false), env (0)
+  { }
+
+protected:
+  T jobj;
+  bool detached;
+  JNIEnv *env;
+};
+
+typedef java_local_ref<jobject> jobject_ref;
+typedef java_local_ref<jclass> jclass_ref;
+typedef java_local_ref<jstring> jstring_ref;
+typedef java_local_ref<jobjectArray> jobjectArray_ref;
+typedef java_local_ref<jintArray> jintArray_ref;
+typedef java_local_ref<jbyteArray> jbyteArray_ref;
+typedef java_local_ref<jdoubleArray> jdoubleArray_ref;
+typedef java_local_ref<jthrowable> jthrowable_ref;
+
+extern JAVAPKG_API std::string
+jstring_to_string (JNIEnv* jni_env, jstring s);
+
+extern JAVAPKG_API std::string
+jstring_to_string (JNIEnv* jni_env, jobject obj);
+
+extern JAVAPKG_API octave_value
+box (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
+
+extern JAVAPKG_API octave_value
+box_more (JNIEnv* jni_env, jobject jobj, jclass jcls = 0);
+
+extern JAVAPKG_API int
+unbox (JNIEnv* jni_env, const octave_value& val, jobject_ref& jobj,
+       jclass_ref& jcls);
+
+extern JAVAPKG_API int
+unbox (JNIEnv* jni_env, const octave_value_list& args,
+       jobjectArray_ref& jobjs, jobjectArray_ref& jclss);
+
+extern JAVAPKG_API bool Vjava_convert_matrix;
+
+extern JAVAPKG_API bool Vjava_unsigned_conversion;
+
+extern JAVAPKG_API bool Vjava_debug;
+
+class JAVAPKG_API octave_java : public octave_base_value
+{
+public:
+
+  octave_java (void)
+    : octave_base_value (), java_object (0), java_class (0)
+  { }
+
+  octave_java (const octave_java& jobj)
+    : octave_base_value (jobj), java_object (0), java_class (0)
+  {
+    init (jobj.java_object, jobj.java_class);
+  }
+
+  octave_java (const jobject& obj, jclass cls = 0)
+    : octave_base_value (), java_object (0)
+  {
+    init (obj, cls);
+  }
+
+  ~octave_java (void) { release (); }
+
+  jobject to_java (void) const { return java_object; }
+  jclass to_class (void) const { return java_class; }
+
+  std::string java_class_name (void) const { return java_type; }
+
+  octave_base_value* clone (void) const { return new octave_java (*this); }
+  octave_base_value* empty_clone (void) const { return new octave_java (); }
+
+  bool is_defined (void) const { return true; }
+
+  bool is_map (void) const { return true; }
+
+  string_vector map_keys (void) const;
+
+  dim_vector dims (void) const;
+
+  void print (std::ostream& os, bool pr_as_read_syntax = false) const
+  {
+    os << "<Java object: " << java_type << ">";
+    newline(os);
+  }
+
+  void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const
+  {
+    print(os, pr_as_read_syntax);
+  }
+
+  octave_value_list
+  subsref (const std::string& type,
+           const std::list<octave_value_list>& idx, int nargout);
+
+  octave_value
+  subsref (const std::string& type, const std::list<octave_value_list>& idx)
+  {
+    octave_value_list retval = subsref (type, idx, 1);
+    return (retval.length () > 0 ? retval(0) : octave_value ());
+  }
+
+  octave_value subsasgn (const std::string& type,
+                         const std::list<octave_value_list>& idx,
+                         const octave_value& rhs);
+
+  octave_value convert_to_str_internal (bool pad, bool force, char type) const;
+
+  bool is_string (void) const
+  {
+    JNIEnv *current_env = thread_jni_env ();
+
+    if (current_env && java_object)
+      {
+        jclass_ref cls (current_env, current_env->FindClass ("java/lang/String"));
+        return current_env->IsInstanceOf (java_object, cls);
+      }
+
+    return false;
+  }
+
+  static JNIEnv* thread_jni_env (void);
+
+  octave_value do_java_invoke (JNIEnv* jni_env, const std::string& name,
+                               const octave_value_list& args);
+
+  octave_value
+  do_java_invoke (const std::string& name, const octave_value_list& args)
+  {
+    return do_java_invoke(thread_jni_env (), name, args);
+  }
+
+  static octave_value
+  do_java_invoke (JNIEnv* jni_env, const std::string& class_name,
+                  const std::string& name, const octave_value_list& args);
+
+  static octave_value
+  do_java_invoke (const std::string& class_name, const std::string& name,
+                  const octave_value_list& args)
+  {
+    return do_java_invoke(thread_jni_env (), class_name, name, args);
+  }
+
+  static octave_value
+  do_java_create (JNIEnv* jni_env, const std::string& name,
+                  const octave_value_list& args);
+
+  static octave_value
+  do_java_create (const std::string& name, const octave_value_list& args)
+  {
+    return do_java_create (thread_jni_env (), name, args);
+  }
+
+  octave_value do_java_get (JNIEnv* jni_env, const std::string& name);
+
+  octave_value do_java_get (const std::string& name)
+  {
+    return do_java_get (thread_jni_env (), name);
+  }
+
+  static octave_value
+  do_java_get (JNIEnv* jni_env, const std::string& class_name,
+               const std::string& name);
+
+  static octave_value
+  do_java_get (const std::string& class_name, const std::string& name)
+  {
+    return do_java_get (thread_jni_env (), class_name, name);
+  }
+
+  octave_value do_java_set (JNIEnv* jni_env, const std::string& name,
+                            const octave_value& val);
+
+  octave_value do_java_set (const std::string& name, const octave_value& val)
+  {
+    return do_java_set (thread_jni_env (), name, val);
+  }
+
+  static octave_value
+  do_java_set (JNIEnv* jni_env, const std::string& class_name,
+               const std::string& name, const octave_value& val);
+
+  static octave_value
+  do_java_set (const std::string& class_name, const std::string& name,
+               const octave_value& val)
+  {
+    return do_java_set (thread_jni_env (), class_name, name, val);
+  }
+
+private:
+
+  void init (jobject jobj, jclass jcls)
+  {
+    JNIEnv *current_env = thread_jni_env ();
+
+    if (current_env)
+      {
+        if (jobj)
+          java_object = current_env->NewGlobalRef (jobj);
+
+        if (jcls)
+          java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jcls));
+        else if (java_object)
+          {
+            jclass_ref ocls (current_env, current_env->GetObjectClass (java_object));
+            java_class = reinterpret_cast<jclass> (current_env->NewGlobalRef (jclass (ocls)));
+          }
+
+        if (java_class)
+          {
+            jclass_ref clsCls (current_env, current_env->GetObjectClass (java_class));
+            jmethodID mID = current_env->GetMethodID (clsCls, "getCanonicalName", "()Ljava/lang/String;");
+            jobject_ref resObj (current_env, current_env->CallObjectMethod (java_class, mID));
+            java_type = jstring_to_string (current_env, resObj);
+          }
+      }
+  }
+
+  void release (void)
+  {
+    JNIEnv *current_env = thread_jni_env ();
+
+    if (current_env)
+      {
+        if (java_object)
+          current_env->DeleteGlobalRef (java_object);
+
+        if (java_class)
+          current_env->DeleteGlobalRef (java_class);
+
+        java_object = 0;
+        java_class = 0;
+      }
+  }
+
+private:
+
+  DECLARE_OCTAVE_ALLOCATOR
+
+  DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
+
+  jobject java_object;
+
+  jclass java_class;
+
+  std::string java_type;
+};
+
+#endif
diff -r 72968fb32c82 -r f96faf028d90 run-octave.in
--- a/run-octave.in	Fri Dec 07 19:34:19 2012 -0500
+++ b/run-octave.in	Sat Dec 08 00:23:13 2012 -0500
@@ -80,6 +80,7 @@
 
 OCTAVE_SITE_INITFILE="$top_srcdir/scripts/startup/main-rcfile" \
 OCTAVE_DEFAULT_QT_SETTINGS="$top_srcdir/libgui/default-qt-settings" \
+OCTAVE_JAVA_DIR="$builddir/scripts/java" \
   exec $builddir/libtool --mode=execute $driver \
     "$octave_executable" --no-init-path --path="$LOADPATH" \
     --image-path="$IMAGEPATH" --doc-cache-file="$DOCFILE" \
diff -r 72968fb32c82 -r f96faf028d90 scripts/java/org/octave/Octave.java
--- a/scripts/java/org/octave/Octave.java	Fri Dec 07 19:34:19 2012 -0500
+++ b/scripts/java/org/octave/Octave.java	Sat Dec 08 00:23:13 2012 -0500
@@ -20,11 +20,6 @@
 
 public class Octave
 {
-  static
-  {
-    System.load (System.getProperty ("octave.java.path") + java.io.File.separator + "__java__.oct");
-  }
-
   private static Object notifyObject = null;
   private static Object[] args = null;
   private static LinkedList invokeList = new LinkedList();
diff -r 72968fb32c82 -r f96faf028d90 scripts/java/org/octave/OctaveReference.java
--- a/scripts/java/org/octave/OctaveReference.java	Fri Dec 07 19:34:19 2012 -0500
+++ b/scripts/java/org/octave/OctaveReference.java	Sat Dec 08 00:23:13 2012 -0500
@@ -18,11 +18,6 @@
 
 public class OctaveReference
 {
-	static
-	{
-		System.load (System.getProperty ("octave.java.path") + java.io.File.separator + "__java__.oct");
-	}
-  
 	private int ID;
 
 	public OctaveReference(int ID)