/*
 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//collections/src/java/org/apache/commons/collections/Attic/PriorityQueueUtils.java,v 1.3 2003/11/16 00:05:44 scolebourne Exp $
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowledgement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgement may appear in the software itself,
 *    if and wherever such third-party acknowledgements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package org.apache.commons.collections;

import org.apache.commons.collections.buffer.SynchronizedPriorityQueue;
import org.apache.commons.collections.buffer.UnmodifiablePriorityQueue;

/**
 * Provides static utility methods and decorators for {@link PriorityQueue}.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 1.3 $ $Date: 2003/11/16 00:05:44 $
 * 
 * @author Stephen Colebourne
 */
public class PriorityQueueUtils {

    /**
     * An empty unmodifiable priority queue.
     */
    public static final PriorityQueue EMPTY_PRIORITY_QUEUE = UnmodifiablePriorityQueue.decorate(new BinaryHeap());

    /**
     * <code>PriorityQueueUtils</code> should not normally be instantiated.
     */
    public PriorityQueueUtils() {
    }

    //-----------------------------------------------------------------------
    /**
     * Returns a synchronized priority queue backed by the given priority queue.
     * 
     * @param priorityQueue  the priority queue to synchronize, must not be null
     * @return a synchronized priority queue backed by the given priority queue
     * @throws IllegalArgumentException  if the priority queue is null
     */
    public static PriorityQueue synchronizedPriorityQueue(PriorityQueue priorityQueue) {
        return SynchronizedPriorityQueue.decorate(priorityQueue);
    }

    /**
     * Returns an unmodifiable priority queue backed by the given priority queue.
     *
     * @param priorityQueue  the priority queue to make unmodifiable, must not be null
     * @return an unmodifiable priority queue backed by the given priority queue
     * @throws IllegalArgumentException  if the priority queue is null
     */
    public static PriorityQueue unmodifiablePriorityQueue(PriorityQueue priorityQueue) {
        return UnmodifiablePriorityQueue.decorate(priorityQueue);
    }

}

@@ -174,29 +174,29 @@
 v 1.
-3
+4
  2003/1
-1/16 00:05:44
+2/03 14:39:42
  sco
@@ -2917,16 +2917,73 @@
 tions;%0A%0A
+import org.apache.commons.collections.buffer.BinaryHeap;%0A
 import o
@@ -3262,17 +3262,17 @@
 sion: 1.
-3
+4
  $ $Date
@@ -3283,21 +3283,21 @@
 03/1
-1/16 00:05:44
+2/03 14:39:42
  $%0A 

Fix deprecation by referencing the correct BinaryHeap