QueueEnqueueImpl.java

/****************************************************************************
 * Copyright (c) 2004 Composent, Inc. 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:
 *    Composent, Inc. - initial API and implementation
 *****************************************************************************/

package org.eclipse.ecf.core.sharedobject.util;

import org.eclipse.ecf.core.util.Event;

public class QueueEnqueueImpl implements IQueueEnqueue {
	SimpleFIFOQueue queue = null;

	public QueueEnqueueImpl(SimpleFIFOQueue impl) {
		super();
		this.queue = impl;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue(org.eclipse.ecf.core.util.Event)
	 */
	/**
	 * @param element
	 * @throws QueueException not thrown by this implementation.
	 */
	public void enqueue(Event element) throws QueueException {
		queue.enqueue(element);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue(org.eclipse.ecf.core.util.Event[])
	 */
	public void enqueue(Event[] elements) throws QueueException {
		if (elements != null) {
			for (int i = 0; i < elements.length; i++) {
				enqueue(elements[i]);
			}
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue_prepare(org.eclipse.ecf.core.util.Event[])
	 */
	/**
	 * @param elements
	 * @return Object
	 * @throws QueueException not thrown by this implementation.
	 */
	public Object enqueue_prepare(Event[] elements) throws QueueException {
		return elements;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue_commit(java.lang.Object)
	 */
	public void enqueue_commit(Object enqueue_key) {
		if (enqueue_key instanceof Event[]) {
			Event[] events = (Event[]) enqueue_key;
			try {
				enqueue(events);
			} catch (QueueException e) {
				// this should not happen
				e.printStackTrace(System.err);
			}
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue_abort(java.lang.Object)
	 */
	public void enqueue_abort(Object enqueue_key) {
		// Do nothing
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#enqueue_lossy(org.eclipse.ecf.core.util.Event)
	 */
	public boolean enqueue_lossy(Event element) {
		queue.enqueue(element);
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#setEnqueuePredicate(org.eclipse.ecf.core.util.IEnqueuePredicate)
	 */
	public void setEnqueueProcessor(IEnqueueProcessor pred) {
		// This queue does not support enqueue predicate
		// So we do nothing
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#getEnqueuePredicate()
	 */
	public IEnqueueProcessor getEnqueueProcessor() {
		// We don't support enqueue predicate, so return null;
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ecf.core.util.IQueueEnqueue#size()
	 */
	public int size() {
		return queue.size();
	}
}