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1 /*
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24  * Alternately, this acknowledgment may appear in the software itself,
25  * if and wherever such third-party acknowledgments normally appear.
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50  * This software consists of voluntary contributions made by many
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52  * originally based on software copyright (c) 1999, International
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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  * DeferredAttrImpl.java at the same time.
62  */
63
64 /* $Id: DeferredAttrNSImpl.java,v 1.1.1.1 2003/03/10 16:34:29 taweili Exp $ */
65
66
67 package org.enhydra.apache.xerces.dom;
68
69 import org.enhydra.apache.xerces.utils.StringPool;
70
71 /**
72  * DeferredAttrNSImpl is to AttrNSImpl, what DeferredAttrImpl is to
73  * AttrImpl.
74  * @author Andy Clark, IBM
75  * @author Arnaud Le Hors, IBM
76  * @see DeferredAttrImpl
77  */
78 public final class DeferredAttrNSImpl
79     extends AttrNSImpl
80     implements DeferredNode {
81
82     //
83 // Constants
84 //
85
86     /** Serialization version. */
87     static final long serialVersionUID = 6074924934945957154L;
88
89     //
90 // Data
91 //
92
93     /** Node index. */
94     protected transient int fNodeIndex;
95
96     //
97 // Constructors
98 //
99
100     /**
101      * This is the deferred constructor. Only the fNodeIndex is given here.
102      * All other data, can be requested from the ownerDocument via the index.
103      */
104     DeferredAttrNSImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
105         super(ownerDocument, null);
106
107         fNodeIndex = nodeIndex;
108         needsSyncData(true);
109         needsSyncChildren(true);
110
111     } // <init>(DeferredDocumentImpl,int)
112
113     //
114 // DeferredNode methods
115 //
116
117     /** Returns the node index. */
118     public int getNodeIndex() {
119         return fNodeIndex;
120     }
121
122     //
123 // Protected methods
124 //
125
126     /** Synchronizes the data (name and value) for fast nodes. */
127     protected void synchronizeData() {
128
129         // no need to sync in the future
130 needsSyncData(false);
131
132         // fluff data
133 DeferredDocumentImpl ownerDocument =
134         (DeferredDocumentImpl) ownerDocument();
135         int attrQName = ownerDocument.getNodeName(fNodeIndex);
136         StringPool pool = ownerDocument.getStringPool();
137         name = pool.toString(attrQName);
138
139         // extract prefix and local part from QName
140 int index = name.indexOf(':');
141         String JavaDoc prefix;
142         if (index < 0) {
143             prefix = null;
144             localName = name;
145         }
146         else {
147             prefix = name.substring(0, index);
148             localName = name.substring(index + 1);
149         }
150
151         isSpecified(ownerDocument.getNodeValue(fNodeIndex) == 1);
152     //namespaceURI = pool.toString(ownerDocument.getNodeURI(attrQName));
153 namespaceURI = pool.toString(ownerDocument.getNodeURI(fNodeIndex));
154         // hide the fact that our parser uses an empty string for null
155 if (namespaceURI.length() == 0) {
156             namespaceURI = null;
157         }
158     // DOM Level 2 wants all namespace declaration attributes
159 // to be bound to "http://www.w3.org/2000/xmlns/"
160 // So as long as the XML parser doesn't do it, it needs to
161 // done here.
162 if (namespaceURI == null) {
163         if (prefix != null) {
164         if (prefix.equals("xmlns")) {
165             namespaceURI = "http://www.w3.org/2000/xmlns/";
166         }
167         } else if (name.equals("xmlns")) {
168         namespaceURI = "http://www.w3.org/2000/xmlns/";
169         }
170     }
171
172     } // synchronizeData()
173
174     /**
175      * Synchronizes the node's children with the internal structure.
176      * Fluffing the children at once solves a lot of work to keep
177      * the two structures in sync. The problem gets worse when
178      * editing the tree -- this makes it a lot easier.
179      */
180     protected void synchronizeChildren() {
181         DeferredDocumentImpl ownerDocument =
182             (DeferredDocumentImpl) ownerDocument();
183         ownerDocument.synchronizeChildren(this, fNodeIndex);
184     } // synchronizeChildren()
185
186 } // class DeferredAttrImpl
187
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