Mercurial > octave-nkf
view scripts/java/usejava.m @ 20651:e54ecb33727e
lo-array-gripes.cc: Remove FIXME's related to buffer size.
* lo-array-gripes.cc: Remove FIXME's related to buffer size. Shorten sprintf
buffers from 100 to 64 characters (still well more than 19 required).
Use 'const' decorator on constant value for clarity. Remove extra space
between variable and array bracket.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 12 Oct 2015 21:13:47 -0700 |
parents | 9fc020886ae9 |
children |
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## Copyright (C) 2012-2015 Rik Wehbring ## Parts Copyright (C) 2012-2015 Philip Nienhuis ## ## 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/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} usejava (@var{feature}) ## Return true if the Java element @var{feature} is available. ## ## Possible features are: ## ## @table @asis ## @item @qcode{"awt"} ## Abstract Window Toolkit for GUIs. ## ## @item @qcode{"desktop"} ## Interactive desktop is running. ## ## @item @qcode{"jvm"} ## Java Virtual Machine. ## ## @item @qcode{"swing"} ## Swing components for lightweight GUIs. ## @end table ## ## @code{usejava} determines if specific Java features are available in an ## Octave session. This function is provided for scripts which may alter ## their behavior based on the availability of Java. The feature ## @qcode{"desktop"} always returns @code{false} as Octave has no Java-based ## desktop. Other features may be available if Octave was compiled with the ## Java Interface and Java is installed. ## @seealso{javachk} ## @end deftypefn ## Author: Rik Wehbring ## Author: Philip Nienhuis <prnienhuis@users.sf.net> function retval = usejava (feature) if (nargin != 1 || ! ischar (feature)) print_usage (); endif retval = false; switch (feature) ## For each feature, try methods() on a Java class of a feature case "awt" try dum = methods ("java.awt.Frame"); retval = true; end_try_catch case "desktop" ## Octave has no Java based GUI/desktop, leave retval = false case "jvm" try dum = methods ("java.lang.Runtime"); retval = true; end_try_catch case "swing" try dum = methods ("javax.swing.Popup"); retval = true; end_try_catch otherwise error ("usejava: unrecognized feature '%s'", feature); endswitch endfunction %!assert (usejava ("desktop"), false) %!testif HAVE_JAVA %! assert (usejava ("jvm"), true); ## Test input validation %!error usejava () %!error usejava (1, 2) %!error usejava (1) %!error <unrecognized feature> usejava ("abc")