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/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.internal.ui.sourcelookup;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IStatusHandler;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.swt.widgets.Display;
/**
* Prompts the user in the UI (asynchronously), on behalf of a non-UI client,
* blocking the calling thread until a response is received.
* <p>
* This status handler is registered for for the debug UI plug-in,
* with a status code of <code>STATUS_HANDLER_PROMPT</code>.
* </p>
* @since 3.0
*/
public class Prompter implements IStatusHandler {
/**
* Prompts the user for input based on the given status and source
* object, blocking the calling thread until the status is resolved.
*
* @param status client status code for which a status handler must
* be registered
* @param source object requesting the status to be resolved
* @return result of resolving the given status
* @see org.eclipse.debug.core.IStatusHandler#handleStatus(org.eclipse.core.runtime.IStatus, java.lang.Object)
*/
@Override
public Object handleStatus(final IStatus status, final Object source) throws CoreException {
DebugPlugin dp = DebugPlugin.getDefault();
// on shutdown the debug plug-in can be null
if (dp == null) {
throw new CoreException(new Status(IStatus.INFO,
IDebugUIConstants.PLUGIN_ID,
IStatus.OK,
SourceLookupUIMessages.Prompter_0,
null));
}
final IStatusHandler handler = dp.getStatusHandler(status);
if (handler == null) {
throw new CoreException(new Status(IStatus.ERROR,
IDebugUIConstants.PLUGIN_ID,
IStatus.OK,
SourceLookupUIMessages.Prompter_0,
null));
}
Display display = DebugUIPlugin.getStandardDisplay();
if (display.getThread().equals(Thread.currentThread())) {
return handler.handleStatus(status, source);
}
final Object[] result = new Object[1];
final CoreException[] exception = new CoreException[1];
final Object lock = this;
Runnable r = new Runnable() {
@Override
public void run() {
try {
result[0] = handler.handleStatus(status, source);
} catch (CoreException e) {
exception[0] = e;
}
synchronized (lock) {
lock.notifyAll();
}
}
};
DebugUIPlugin.getStandardDisplay().syncExec(r);
if (exception[0] != null ) {
throw exception[0];
}
return result[0];
}
}
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