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/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.internal.util.factory;
import org.eclipse.net4j.internal.util.bundle.OM;
import org.eclipse.net4j.internal.util.registry.HashMapRegistry;
import org.eclipse.net4j.util.factory.IFactory;
import org.eclipse.net4j.util.factory.IFactoryKey;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionDelta;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.IRegistryChangeEvent;
import org.eclipse.core.runtime.IRegistryChangeListener;
import org.eclipse.core.runtime.Platform;
/**
* @author Eike Stepper
*/
public class PluginFactoryRegistry extends HashMapRegistry<IFactoryKey, IFactory>
{
public static final String NAMESPACE = OM.BUNDLE_ID;
public static final String EXT_POINT = "factories";
private IRegistryChangeListener extensionRegistryListener = new IRegistryChangeListener()
{
public void registryChanged(IRegistryChangeEvent event)
{
IExtensionDelta[] deltas = event.getExtensionDeltas(NAMESPACE, EXT_POINT);
for (IExtensionDelta delta : deltas)
{
// TODO Handle ExtensionDelta
OM.LOG.warn("ExtensionDelta not handled: " + delta);
}
}
};
public PluginFactoryRegistry()
{
}
@Override
public IFactory get(Object key)
{
IFactory factory = super.get(key);
if (factory instanceof FactoryDescriptor)
{
FactoryDescriptor descriptor = (FactoryDescriptor)factory;
factory = descriptor.createFactory();
}
return factory;
}
public void registerFactory(FactoryDescriptor factory)
{
put(factory.getKey(), factory);
}
@Override
protected void doActivate() throws Exception
{
super.doActivate();
IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
IConfigurationElement[] elements = extensionRegistry.getConfigurationElementsFor(NAMESPACE, EXT_POINT);
for (IConfigurationElement element : elements)
{
registerFactory(new FactoryDescriptor(element));
}
extensionRegistry.addRegistryChangeListener(extensionRegistryListener, NAMESPACE);
}
@Override
protected void doDeactivate() throws Exception
{
IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
extensionRegistry.removeRegistryChangeListener(extensionRegistryListener);
clear();
super.doDeactivate();
}
}
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