/*
* Copyright 2003-2004 The Apache Software 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.apache.commons.collections.buffer;
import org.apache.commons.collections.Buffer;
import org.apache.commons.collections.collection.SynchronizedCollection;
/**
* Decorates another <code>Buffer</code> to synchronize its behaviour
* for a multi-threaded environment.
* <p>
* Methods are synchronized, then forwarded to the decorated buffer.
* <p>
* This class is Serializable from Commons Collections 3.1.
*
* @since Commons Collections 3.0
* @version $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
*
* @author Stephen Colebourne
*/
public class SynchronizedBuffer extends SynchronizedCollection implements Buffer {
/** Serialization version */
private static final long serialVersionUID = -6859936183953626253L;
/**
* Factory method to create a synchronized buffer.
*
* @param buffer the buffer to decorate, must not be null
* @return a new synchronized Buffer
* @throws IllegalArgumentException if buffer is null
*/
public static Buffer decorate(Buffer buffer) {
return new SynchronizedBuffer(buffer);
}
//-----------------------------------------------------------------------
/**
* Constructor that wraps (not copies).
*
* @param buffer the buffer to decorate, must not be null
* @throws IllegalArgumentException if the buffer is null
*/
protected SynchronizedBuffer(Buffer buffer) {
super(buffer);
}
/**
* Constructor that wraps (not copies).
*
* @param buffer the buffer to decorate, must not be null
* @param lock the lock object to use, must not be null
* @throws IllegalArgumentException if the buffer is null
*/
protected SynchronizedBuffer(Buffer buffer, Object lock) {
super(buffer, lock);
}
/**
* Gets the buffer being decorated.
*
* @return the decorated buffer
*/
protected Buffer getBuffer() {
return (Buffer) collection;
}
//-----------------------------------------------------------------------
public Object get() {
synchronized (lock) {
return getBuffer().get();
}
}
public Object remove() {
synchronized (lock) {
return getBuffer().remove();
}
}
}