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/**
* Copyright 2012 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.common.util.awt;
import java.awt.EventQueue;
import java.lang.reflect.InvocationTargetException;
import com.jogamp.common.util.RunnableExecutor;
/**
* AWT EDT implementation of RunnableExecutor
*/
public class AWTEDTExecutor implements RunnableExecutor {
/** {@link RunnableExecutor} implementation invoking {@link Runnable#run()}
* on the AWT EDT.
*/
public static final AWTEDTExecutor singleton = new AWTEDTExecutor();
private AWTEDTExecutor() {}
@Override
public void invoke(boolean wait, Runnable r) {
if(EventQueue.isDispatchThread()) {
r.run();
} else {
try {
if(wait) {
EventQueue.invokeAndWait(r);
} else {
EventQueue.invokeLater(r);
}
} catch (InvocationTargetException e) {
throw new RuntimeException(e.getTargetException());
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
/**
* Executes the given runnable on the AWT-EDT and return <code>true</code>, if
* <ul>
* <li>current-thread is the AWT-EDT, <i>or</i></li>
* <li>the given tree-lock is not hold by current-thread (-> invoke on AWT-EDT)</li>
* </ul>
* <p>
* Otherwise execute the given runnable on the current-thread and return <code>true</code>, if
* <code>allowOnNonEDT</code> is <code>true</code>.<br/>
* This implies that the given tree-lock is being hold by the current-thread.
* </p>
* <p>
* Otherwise the runnable is not executed and <code>false</code> is returned.
* </p>
*
* @param treeLock representing the AWT-tree-lock, i.e. {@link java.awt.Component#getTreeLock()}
* @param allowOnNonEDT allow execution on non AWT-EDT in case current thread is not AWT-EDT and the tree-lock is being hold
* @param wait if true method waits until {@link Runnable#run()} is completed, otherwise don't wait.
* @param r the {@link Runnable} to be executed.
* @return <code>true</code> if the {@link Runnable} has been issued for execution, otherwise <code>false</code>
*/
public boolean invoke(Object treeLock, boolean allowOnNonEDT, boolean wait, Runnable r) {
if( EventQueue.isDispatchThread() ) {
r.run();
return true;
} else if ( !Thread.holdsLock(treeLock) ) {
try {
if(wait) {
EventQueue.invokeAndWait(r);
} else {
EventQueue.invokeLater(r);
}
} catch (InvocationTargetException e) {
throw new RuntimeException(e.getTargetException());
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
return true;
} else if ( allowOnNonEDT ) {
r.run();
return true;
} else {
return false;
}
}
}
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