DelegatingSocketImplFactory.java

/*
 * Copyright 2011 Open Source Applications Foundation
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.osaf.caldav4j.support;

import java.net.SocketImpl;
import java.net.SocketImplFactory;

/**
 * {@code SocketImplFactory} that delegates to another implementation.
 * 
 * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
 * @version $Id$
 */
class DelegatingSocketImplFactory implements SocketImplFactory
{
	// fields -----------------------------------------------------------------
	
	private SocketImplFactory delegate;
	
	// constructors -----------------------------------------------------------
	
	public DelegatingSocketImplFactory(SocketImplFactory delegate)
	{
		setDelegate(delegate);
	}
	
	// SocketImplFactory methods ----------------------------------------------
	
	/**
	 * {@inheritDoc}
	 */
	public SocketImpl createSocketImpl()
	{
		return delegate.createSocketImpl();
	}
	
	// public methods ---------------------------------------------------------
	
	public SocketImplFactory getDelegate()
	{
		return delegate;
	}
	
	public void setDelegate(SocketImplFactory delegate)
	{
		if (delegate == null)
		{
			throw new NullPointerException("delegate cannot be null");
		}
		
		this.delegate = delegate;
	}
}