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Java > Open Source Codes > org > netbeans > modules > javacore > jmiimpl > javamodel > AssociationLinkImpl


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.javacore.jmiimpl.javamodel;
21
22 import javax.jmi.reflect.RefAssociationLink;
23 import javax.jmi.reflect.RefObject;
24
25 import org.netbeans.jmi.javamodel.Element;
26
27 /** RefAssociationLink implementation.
28  *
29  * @author Vladimir Hudec
30  */
31 public class AssociationLinkImpl implements RefAssociationLink {
32
33     private final Element end1;
34     private final Element end2;
35
36     AssociationLinkImpl(Element end1, Element end2) {
37         if (end1 == null || end2 == null)
38             throw new NullPointerException JavaDoc();
39         this.end1 = end1;
40         this.end2 = end2;
41     }
42     
43     public RefObject refFirstEnd() {
44         return end1;
45     }
46     
47     public RefObject refSecondEnd() {
48         return end2;
49     }
50     
51     public boolean equals(Object JavaDoc other) {
52         if (other instanceof AssociationLinkImpl) {
53             return this == other;
54         } else {
55             return (other instanceof RefAssociationLink) &&
56                 ((RefAssociationLink) other).refFirstEnd().equals(refFirstEnd()) &&
57                 ((RefAssociationLink) other).refSecondEnd().equals(refSecondEnd());
58         }
59     }
60     
61     public int hashCode() {
62         return (refFirstEnd().refMofId() + refSecondEnd().refMofId()).hashCode();
63     }
64 }
65
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