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Java > Open Source Codes > org > jdom > contrib > ids > IdAttribute


1 /*--
2
3  $Id: IdAttribute.java,v 1.1 2004/12/11 00:01:54 jhunter Exp $
4
5  Copyright (C) 2001-2004 Jason Hunter & Brett McLaughlin.
6  All rights reserved.
7
8  Redistribution and use in source and binary forms, with or without
9  modification, are permitted provided that the following conditions
10  are met:
11
12  1. Redistributions of source code must retain the above copyright
13     notice, this list of conditions, and the following disclaimer.
14
15  2. Redistributions in binary form must reproduce the above copyright
16     notice, this list of conditions, and the disclaimer that follows
17     these conditions in the documentation and/or other materials
18     provided with the distribution.
19
20  3. The name "JDOM" must not be used to endorse or promote products
21     derived from this software without prior written permission. For
22     written permission, please contact <request_AT_jdom_DOT_org>.
23
24  4. Products derived from this software may not be called "JDOM", nor
25     may "JDOM" appear in their name, without prior written permission
26     from the JDOM Project Management <request_AT_jdom_DOT_org>.
27
28  In addition, we request (but do not require) that you include in the
29  end-user documentation provided with the redistribution and/or in the
30  software itself an acknowledgement equivalent to the following:
31      "This product includes software developed by the
32       JDOM Project (http://www.jdom.org/)."
33  Alternatively, the acknowledgment may be graphical using the logos
34  available at http://www.jdom.org/images/logos.
35
36  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39  DISCLAIMED. IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
40  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47  SUCH DAMAGE.
48
49  This software consists of voluntary contributions made by many
50  individuals on behalf of the JDOM Project and was originally
51  created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
52  Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
53  on the JDOM Project, please see <http://www.jdom.org/>.
54
55  */
56
57 package org.jdom.contrib.ids;
58
59 import org.jdom.Attribute;
60 import org.jdom.Document;
61 import org.jdom.Element;
62 import org.jdom.Namespace;
63 import org.jdom.Parent;
64
65
66 /**
67  * A sub-class of the default JDOM <code>Attribute</code> to help
68  * keeping up-to-date the element lookup table maintained by
69  * <code>IdDocument</code>.
70  *
71  * @author Laurent Bihanic
72  */
73 public class IdAttribute extends Attribute {
74
75     public IdAttribute(String JavaDoc name, String JavaDoc value, Namespace namespace) {
76         super(name, value, namespace);
77     }
78
79     public IdAttribute(String JavaDoc name, String JavaDoc value,
80                                         int type, Namespace namespace) {
81         super(name, value, type, namespace);
82     }
83
84     public IdAttribute(String JavaDoc name, String JavaDoc value) {
85         this(name, value, UNDECLARED_TYPE, Namespace.NO_NAMESPACE);
86     }
87
88     public IdAttribute(String JavaDoc name, String JavaDoc value, int type) {
89         this(name, value, type, Namespace.NO_NAMESPACE);
90     }
91
92     protected Attribute setParent(Element parent) {
93         Parent oldParent = this.getParent();
94
95         super.setParent(parent);
96
97         if (this.getAttributeType() == Attribute.ID_TYPE) {
98             Document doc;
99
100             // Udpate the owning document's lookup table.
101 if (oldParent != null) {
102                 doc = oldParent.getDocument();
103                 if (doc instanceof IdDocument) {
104                     ((IdDocument)doc).removeId(this.getValue());
105                 }
106             }
107             doc = this.getDocument();
108             if (doc instanceof IdDocument) {
109                 ((IdDocument)doc).addId(this.getValue(), this.getParent());
110             }
111         }
112         return this;
113     }
114
115     public Attribute setValue(String JavaDoc value) {
116         String JavaDoc oldValue = this.getValue();
117
118         super.setValue(value);
119
120         if (this.getAttributeType() == Attribute.ID_TYPE) {
121             // Udpate the owning document's lookup table.
122 Document doc = this.getDocument();
123             if (doc instanceof IdDocument) {
124                 ((IdDocument)doc).removeId(oldValue);
125                 ((IdDocument)doc).addId(this.getValue(), this.getParent());
126             }
127         }
128         return this;
129     }
130
131     public Attribute setAttributeType(int type) {
132         int oldType = this.getAttributeType();
133
134         if (type != oldType) {
135             super.setAttributeType(type);
136
137             // Udpate the owning document's lookup table.
138 Document doc = this.getDocument();
139             if (doc instanceof IdDocument) {
140                 if (oldType == Attribute.ID_TYPE) {
141                     ((IdDocument)doc).removeId(this.getValue());
142                 }
143                 if (type == Attribute.ID_TYPE) {
144                     ((IdDocument)doc).addId(this.getValue(), this.getParent());
145                 }
146             }
147         }
148         return this;
149     }
150 }
151
152
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