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Java > Open Source Codes > org > jvyamlb > nodes > Node


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2007 Ola Bini <ola@ologix.com>
15  *
16  * Alternatively, the contents of this file may be used under the terms of
17  * either of the GNU General Public License Version 2 or later (the "GPL"),
18  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
19  * in which case the provisions of the GPL or the LGPL are applicable instead
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25  * the provisions above, a recipient may use your version of this file under
26  * the terms of any one of the CPL, the GPL or the LGPL.
27  ***** END LICENSE BLOCK *****/
28 package org.jvyamlb.nodes;
29
30 /**
31  * @author <a HREF="mailto:ola.bini@ki.se">Ola Bini</a>
32  */
33 public abstract class Node {
34     private String JavaDoc tag;
35     private Object JavaDoc value;
36     private int hash = -1;
37
38     public Node(final String JavaDoc tag, final Object JavaDoc value) {
39         this.tag = tag;
40         this.value = value;
41     }
42
43     public String JavaDoc getTag() {
44         return this.tag;
45     }
46
47     public Object JavaDoc getValue() {
48         return this.value;
49     }
50
51     public int hashCode() {
52         if(hash == -1) {
53             hash = 3;
54             hash += (null == tag) ? 0 : 3*tag.hashCode();
55             hash += (null == value) ? 0 : 3*value.hashCode();
56         }
57         return hash;
58     }
59
60     public boolean equals(final Object JavaDoc oth) {
61         if(oth instanceof Node) {
62             final Node nod = (Node)oth;
63             return ((this.tag != null) ? this.tag.equals(nod.tag) : nod.tag == null) &&
64                 ((this.value != null) ? this.value.equals(nod.value) : nod.value == null);
65         }
66         return false;
67     }
68
69     public String JavaDoc toString() {
70         return "#<" + this.getClass().getName() + " (tag=" + getTag() + ", value=" + getValue()+")>";
71     }
72 }// Node
73
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