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/*
* Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) 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:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.net4j.signal.wrapping;
import org.eclipse.net4j.signal.SignalProtocol;
import org.eclipse.net4j.util.ObjectUtil;
import org.eclipse.net4j.util.container.IElementProcessor;
import org.eclipse.net4j.util.container.IManagedContainer;
import org.eclipse.net4j.util.io.IStreamWrapper;
/**
* An {@link IElementProcessor element post processor} that injects a {@link #getStreamWrapper() stream wrapper}
* into {@link SignalProtocol signal protocol} instances.
*
* @author Eike Stepper
*/
public class StreamWrapperInjector implements IElementProcessor
{
private String protocolID;
private IStreamWrapper streamWrapper;
public StreamWrapperInjector(String protocolID, IStreamWrapper streamWrapper)
{
this.protocolID = protocolID;
this.streamWrapper = streamWrapper;
}
public String getProtocolID()
{
return protocolID;
}
public IStreamWrapper getStreamWrapper()
{
return streamWrapper;
}
public Object process(IManagedContainer container, String productGroup, String factoryType, String description,
Object element)
{
if (element instanceof SignalProtocol<?>)
{
SignalProtocol<?> signalProtocol = (SignalProtocol<?>)element;
if (shouldInject(container, productGroup, factoryType, description, signalProtocol))
{
element = inject(container, productGroup, factoryType, description, signalProtocol);
}
}
return element;
}
protected boolean shouldInject(IManagedContainer container, String productGroup, String factoryType,
String description, SignalProtocol<?> signalProtocol)
{
if (signalProtocol.getStreamWrapper() == streamWrapper)
{
return false;
}
return ObjectUtil.equals(signalProtocol.getType(), protocolID);
}
protected Object inject(IManagedContainer container, String productGroup, String factoryType, String description,
SignalProtocol<?> signalProtocol)
{
signalProtocol.addStreamWrapper(streamWrapper);
return signalProtocol;
}
}
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