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Java > Open Source Codes > com > sun > enterprise > util > collection > SynchronizedDListNode


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23
24 //NOTE: Tabs are used instead of spaces for indentation.
25 // Make sure that your editor does not replace tabs with spaces.
26 // Set the tab length using your favourite editor to your
27 // visual preference.
28
29 /*
30  * Filename: DListNode.java
31  *
32  * Copyright 2000-2001 by iPlanet/Sun Microsystems, Inc.,
33  * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
34  * All rights reserved.
35  *
36  * This software is the confidential and proprietary information
37  * of iPlanet/Sun Microsystems, Inc. ("Confidential Information").
38  * You shall not disclose such Confidential Information and shall
39  * use it only in accordance with the terms of the license
40  * agreement you entered into with iPlanet/Sun Microsystems.
41  */
42  
43 /**
44  * <BR> <I>$Source: /cvs/glassfish/appserv-commons/src/java/com/sun/enterprise/util/collection/SynchronizedDListNode.java,v $</I>
45  * @author $Author: tcfujii $
46  * @version $Revision: 1.3 $ $Date: 2005/12/25 04:12:13 $
47  */
48  
49 package com.sun.enterprise.util.collection;
50
51 public class SynchronizedDListNode
52     extends DListNode
53 {
54     public SynchronizedDListNode() {
55     }
56             
57     public SynchronizedDListNode(Object JavaDoc obj) {
58         this.object = obj;
59     }
60             
61     public void delink() {
62         synchronized (prev) {
63             synchronized (this) {
64                 prev.next = next;
65                 next.prev = prev;
66                 prev = next = null;
67             }
68         }
69     }
70                     
71     public void insertBefore(DListNode node) {
72         synchronized (prev) {
73             synchronized (this) {
74                 node.prev = prev;
75                 node.next = this;
76                 prev.next = node;
77                 prev = node;
78             }
79         }
80     }
81                     
82     public void insertAfter(DListNode node) {
83         next.insertBefore(node);
84     }
85                     
86 }
87
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