/*
 * 
 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * The contents of this file are subject to the Sun Community Source
 * License v3.0/Jini Technology Specific Attachment v 1.0 (the
 * "License"). You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * http://wwws.sun.com/software/jini/licensing/SCSL3_JiniTSA1.html.
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Reference Code is Jini Technology Core Platform code, v2.0. The
 * Developer of the Reference Code is Sun Microsystems, Inc.
 * 
 * Contributor(s): Sun Microsystems, Inc.
 * 
 * The contents of this file comply with the Jini Technology Core
 * Platform Compatibility Kit, v2.0A.
 * 
 * Tester(s): Sun Microsystems, Inc.
 * 
 * Test Platform(s):
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Solaris(TM)SPARC/x86
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Linux (Intel x86)
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Windows (Intel Platform)
 * 
 */
package net.jini.id;

/**
 * Convenience methods for working with proxies that implement
 * <code>ReferentUuid</code>.
 * @author Sun Microsystems, Inc.
 * @see ReferentUuid
 * @since 2.0
 */
public class ReferentUuids {
    /**
     * Returns <code>true</code> if the two passed objects are
     * non-<code>null</code>, implement <code>ReferentUuid</code> and
     * their <code>getReferentUuid</code> methods return equivalent
     * <code>Uuid</code>s, or if they are both <code>null</code>.
     * Otherwise returns <code>false</code>.
     * @param o1 The first object to compare.
     * @param o2 The second object to compare.
     * @return <code>true</code> if <code>o1</code> and <code>o2</code>
     *         implement <code>ReferentUuid</code> and their
     *         <code>getReferentUuid</code> methods return equivalent 
     *         <code>Uuid</code>s, or if <code>o1</code> and <code>o2</code>
     *         are both <code>null</code>.
     */
    public static boolean compare(Object o1, Object o2) {
	if (o1 == null || o2 == null)
	    return o1 == o2; // return true if both null

	if (!(o1 instanceof ReferentUuid))
	    return false;

	if (!(o2 instanceof ReferentUuid))
	    return false;

	return ((ReferentUuid)o1).getReferentUuid().equals(
	    ((ReferentUuid)o2).getReferentUuid());
    }
}
