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/*******************************************************************************
* Copyright (c) 2005, 2006 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.equinox.internal.app;
import org.eclipse.equinox.app.*;
public class SingletonContainerMgr implements IContainer {
private EclipseAppHandle singletonHandle;
private String type;
private IContainer singletonContainer;
private ContainerManager containerManager;
public SingletonContainerMgr(IContainer singletonContainer, String type, ContainerManager containerManager) {
this.singletonContainer = singletonContainer;
this.type = type;
this.containerManager = containerManager;
}
public synchronized IApplication launch(IAppContext context) throws Exception {
if (context != singletonHandle)
throw new IllegalStateException("Only one application of type \"" + type + "\" is allowed to run at a time");
return singletonContainer.launch(context);
}
public boolean isSingletonContainer() {
return true;
}
synchronized boolean isLocked() {
return singletonHandle != null;
}
synchronized void lock(EclipseAppHandle appHandle) {
if (singletonHandle != null)
throw new IllegalStateException("Only one application of type \"" + type + "\" is allowed to run at a time");
singletonHandle = appHandle;
refreshAppDescriptors();
}
synchronized void unlock() {
singletonHandle = null;
refreshAppDescriptors();
}
private void refreshAppDescriptors() {
EclipseAppDescriptor[] singletonApps = containerManager.getAppDescriptorsByType(type);
for (int i = 0; i < singletonApps.length; i++) {
singletonApps[i].setSingletonMgr(this);
singletonApps[i].refreshProperties();
}
}
}
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