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annotate scripts/miscellaneous/usejava.m @ 14200:64d9f33313cc stable rc-3-6-0-1

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3.6.0-rc1 release candidate * configure.ac (AC_INIT): Version is now 3.6.0-rc1. (OCTAVE_RELEASE_DATE): Now 2012-01-12.
author John W. Eaton <jwe@octave.org>
date Thu, 12 Jan 2012 14:31:50 -0500
parents 72c96de7a403
children 937035390ec0
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72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2012 Rik Wehbring
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} usejava (@var{feature})
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21 ## Return true if the specific Sun Java element @var{feature} is available.
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22 ##
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23 ## Possible features are:
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24 ##
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25 ## @table @asis
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26 ## @item "awt"
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27 ## Abstract Window Toolkit for GUIs.
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28 ##
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29 ## @item "desktop"
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30 ## Interactive desktop is running.
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31 ##
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32 ## @item "jvm"
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33 ## Java Virtual Machine.
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34 ##
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35 ## @item "swing"
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36 ## Swing components for lightweight GUIs.
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37 ## @end table
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38 ##
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39 ## This function is provided for compatibility with @sc{matlab} scripts which
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40 ## may alter their behavior based on the availability of Java. Octave does
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41 ## not implement an interface to Java and this function always returns
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42 ## @code{false}.
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43 ## @end deftypefn
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44
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45 function retval = usejava (feature)
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46
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47 if (nargin != 1 || ! ischar (feature))
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48 print_usage ();
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49 endif
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50
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51 if (! any (strcmp (feature, {"awt", "desktop", "jvm", "swing"})))
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52 error ("usejava: unrecognized feature '%s'", feature);
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53 endif
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54
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55 retval = false;
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56
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57 endfunction
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58
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59
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60 %!assert (usejava ("awt"), false)
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61
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62 %% Test input validation
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63 %!error usejava ()
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64 %!error usejava (1, 2)
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65 %!error usejava (1)
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66 %!error <unrecognized feature> usejava ("abc")
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67