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Java > Open Source Codes > org > enhydra > apache > xerces > dom > DeferredElementImpl


1 /*
2  * The Apache Software License, Version 1.1
3  *
4  *
5  * Copyright (c) 1999 The Apache Software Foundation. All rights
6  * 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 following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. The end-user documentation included with the redistribution,
21  * if any, must include the following acknowledgment:
22  * "This product includes software developed by the
23  * Apache Software Foundation (http://www.apache.org/)."
24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
26  *
27  * 4. The names "Xerces" and "Apache Software Foundation" must
28  * not be used to endorse or promote products derived from this
29  * software without prior written permission. For written
30  * permission, please contact apache@apache.org.
31  *
32  * 5. Products derived from this software may not be called "Apache",
33  * nor may "Apache" appear in their name, without prior written
34  * permission of the Apache Software Foundation.
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 APACHE SOFTWARE FOUNDATION OR
40  * ITS 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  *
50  * This software consists of voluntary contributions made by many
51  * individuals on behalf of the Apache Software Foundation and was
52  * originally based on software copyright (c) 1999, International
53  * Business Machines, Inc., http://www.apache.org. For more
54  * information on the Apache Software Foundation, please see
55  * <http://www.apache.org/>.
56  */
57
58 /*
59  * WARNING: because java doesn't support multi-inheritance some code is
60  * duplicated. If you're changing this file you probably want to change
61  * DeferredElementNSImpl.java at the same time.
62  */
63
64 package org.enhydra.apache.xerces.dom;
65
66 import org.enhydra.apache.xerces.utils.StringPool;
67 import org.w3c.dom.NamedNodeMap JavaDoc;
68
69 /**
70  * Elements represent most of the "markup" and structure of the
71  * document. They contain both the data for the element itself
72  * (element name and attributes), and any contained nodes, including
73  * document text (as children).
74  * <P>
75  * Elements may have Attributes associated with them; the API for this is
76  * defined in Node, but the function is implemented here. In general, XML
77  * applications should retrive Attributes as Nodes, since they may contain
78  * entity references and hence be a fairly complex sub-tree. HTML users will
79  * be dealing with simple string values, and convenience methods are provided
80  * to work in terms of Strings.
81  * <P>
82  * DeferredElementImpl inherits from ElementImpl which does not support
83  * Namespaces. DeferredElementNSImpl, which inherits from ElementNSImpl, does.
84  * @see DeferredElementNSImpl
85  *
86  * @version
87  * @since PR-DOM-Level-1-19980818.
88  */
89 public class DeferredElementImpl
90     extends ElementImpl
91     implements DeferredNode {
92
93     //
94 // Constants
95 //
96
97     /** Serialization version. */
98     static final long serialVersionUID = -7670981133940934842L;
99
100     //
101 // Data
102 //
103
104     /** Node index. */
105     protected transient int fNodeIndex;
106
107     //
108 // Constructors
109 //
110
111     /**
112      * This is the deferred constructor. Only the fNodeIndex is given here. All
113      * other data, can be requested from the ownerDocument via the index.
114      */
115     DeferredElementImpl(DeferredDocumentImpl ownerDoc, int nodeIndex) {
116         super(ownerDoc, null);
117
118         fNodeIndex = nodeIndex;
119         needsSyncChildren(true);
120
121     } // <init>(DocumentImpl,int)
122
123     //
124 // DeferredNode methods
125 //
126
127     /** Returns the node index. */
128     public final int getNodeIndex() {
129         return fNodeIndex;
130     }
131
132     //
133 // Protected methods
134 //
135
136     /** Synchronizes the data (name and value) for fast nodes. */
137     protected final void synchronizeData() {
138
139         // no need to sync in the future
140 needsSyncData(false);
141
142         // fluff data
143 DeferredDocumentImpl ownerDocument =
144             (DeferredDocumentImpl)this.ownerDocument;
145
146         // we don't want to generate any event for this so turn them off
147 boolean orig = ownerDocument.mutationEvents;
148         ownerDocument.mutationEvents = false;
149
150         int elementTypeName = ownerDocument.getNodeName(fNodeIndex);
151         StringPool pool = ownerDocument.getStringPool();
152         name = pool.toString(elementTypeName);
153
154         // attributes
155 setupDefaultAttributes();
156         int index = ownerDocument.getNodeValue(fNodeIndex);
157         if (index != -1) {
158             NamedNodeMap JavaDoc attrs = getAttributes();
159             do {
160                 NodeImpl attr = (NodeImpl)ownerDocument.getNodeObject(index);
161                 attrs.setNamedItem(attr);
162                 index = ownerDocument.getPrevSibling(index);
163             } while (index != -1);
164         }
165
166         // set mutation events flag back to its original value
167 ownerDocument.mutationEvents = orig;
168
169     } // synchronizeData()
170
171     protected final void synchronizeChildren() {
172         DeferredDocumentImpl ownerDocument =
173             (DeferredDocumentImpl) ownerDocument();
174         ownerDocument.synchronizeChildren(this, fNodeIndex);
175     } // synchronizeChildren()
176
177 } // class DeferredElementImpl
178
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