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function AddPsychJavaPath
% Add Psychtoolbox directories containing Java classes to the path
% which MATLAB searches for Java classes. The MATLAB Java path is separate
% from the path searched for .m and mex functions.
%
% PsychtJavaPaths updates the MATLAB Java path lazily, detecting first
% whether the MATLAB paths have already been changed before making changes.
%
% AddPsychJavaPath is called by Psychtoolbox functions which depend on
% Psychtoolbox Java classes; It should be unnecessary to use it within your
% own programs.
%
% see also: PsychJava, IsPsychJavaPathSet
% HISTORY
% 6/20/2006 awi Wrote it. Uses function javaaddpath as suggested by Mario.
% We use IsPsychJavaPathSet to retain state between invocations because use
% of javaaddpath erases global and persistent state within the function
% from which it is called. This is presumably bug in MATLAB (version
% 7.0.4.352 (R14) Service Pack 2).
if ~IsPsychJavaPathSet
path_PsychtoolboxVersion= which('PsychtoolboxVersion');
path_PsychBasic= fileparts(path_PsychtoolboxVersion);
path_PsychtoolboxRoot= fileparts(path_PsychBasic);
path_PsychJava= fullfile(path_PsychtoolboxRoot, 'PsychJava');
%check to see if it is the static path before adding it to the dynamic
%path
staticPath=javaclasspath('-static');
if ~any(strcmp(staticPath, path_PsychJava))
javaaddpath(path_PsychJava)
end
IsPsychJavaPathSet(1);
end
% persistent PSYCH_ARE_JAVA_DIRECTORIES_IN_MATLAB_JAVA_PATH;
%
%
% if isempty(PSYCH_ARE_JAVA_DIRECTORIES_IN_MATLAB_JAVA_PATH)
% path_PsychtoolboxVersion= which('PsychtoolboxVersion');
% path_PsychBasic= fileparts(path_PsychtoolboxVersion);
% path_PsychtoolboxRoot= fileparts(path_PsychBasic);
% path_PsychJava= fullfile(path_PsychtoolboxRoot, 'PsychJava');
% javaaddpath(path_PsychJava);
% PSYCH_ARE_JAVA_DIRECTORIES_IN_MATLAB_JAVA_PATH=1;
% end
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