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1
31 package org.objectweb.proactive.core.xml.io;
32
33 import org.w3c.dom.Node  ;
34 import org.w3c.dom.Element ;
35 import org.w3c.dom.NamedNodeMap ;
36
37
38
46 public class DOMAdaptor {
47
48 private XMLHandler targetHandler;
49
50 public DOMAdaptor(XMLHandler targetHandler) {
51 this.targetHandler = targetHandler;
52 }
53
54
55
59 public void read(Element rootElement) throws java.io.IOException {
60 try {
61 domWalker(rootElement);
62 } catch (org.xml.sax.SAXException e) {
63 throw new java.io.IOException (e.getMessage());
64 }
65 }
66
67
68
72 private void domWalker(Node node) throws org.xml.sax.SAXException {
73 String localName = node.getNodeName();
74 NamedNodeMap nodeMap = node.getAttributes();
75 java.util.Vector prefixes = null;
76 if (nodeMap == null)
77 targetHandler.startElement(localName, new EmptyAttributesImpl());
78 else {
79 prefixes = notifyStartPrefixMapping(nodeMap);
80 targetHandler.startElement(localName, new AttributesImpl(nodeMap));
81 }
82 processChilds(node);
83 targetHandler.endElement(localName);
84 if (prefixes != null) notifyEndPrefixMapping(prefixes);
85 }
86
87
88 private void processChilds(Node node) throws org.xml.sax.SAXException {
89 StringBuffer sb = null;
90 Node child = node.getFirstChild();
91 while (child != null) {
92 switch (child.getNodeType()) {
93 case Node.TEXT_NODE :
94 case Node.CDATA_SECTION_NODE:
95 if (sb==null) sb = new StringBuffer ();
96 sb.append(((org.w3c.dom.CharacterData )child).getData());
97 break;
98
99 default:
100 domWalker(child);
101 break;
102 }
103 child = child.getNextSibling();
104 }
105 if (sb != null) targetHandler.readValue(sb.toString());
106 }
107
108
109 private java.util.Vector notifyStartPrefixMapping(NamedNodeMap nodeMap) throws org.xml.sax.SAXException {
110 java.util.Vector prefixes = null;
111 int n = nodeMap.getLength();
112 for (int i=0; i<n; i++) {
113 Node attributeNode = nodeMap.item(i);
114 String attributeName = attributeNode.getNodeName();
115 if (attributeName.startsWith("xmlns:")) {
116 if (prefixes == null) prefixes = new java.util.Vector ();
118 String prefix = attributeName.substring(6);
119 String URI = attributeNode.getNodeValue();
120 prefixes.addElement(prefix);
121 targetHandler.startPrefixMapping(prefix,URI);
122 }
123 }
124 return prefixes;
125 }
126
127 private void notifyEndPrefixMapping(java.util.Vector prefixes) throws org.xml.sax.SAXException {
128 int n = prefixes.size();
129 for (int i=0; i<n; i++) {
130 targetHandler.endPrefixMapping((String ) prefixes.elementAt(i));
131 }
132 }
133
134
135
139 private class AttributesImpl implements Attributes {
140
141 private NamedNodeMap attributes;
142
143 AttributesImpl(NamedNodeMap attributes) {
144 this.attributes = attributes;
145 }
146
147 public String getValue(int index) {
148 Node node = attributes.item(index);
149 if (node == null) return null;
150 return node.getNodeValue();
151 }
152
153 public String getValue(String qName) {
154 Node node = attributes.getNamedItem(qName);
155 if (node == null) return null;
156 return node.getNodeValue();
157 }
158
159 public String getValue(String uri, String localPart) {
160 Node node = attributes.getNamedItemNS(uri,localPart);
161 if (node == null) return null;
162 return node.getNodeValue();
163 }
164
165 public int getLength() {
166 return attributes.getLength();
167 }
168 }
169
170 protected class EmptyAttributesImpl implements Attributes {
171 EmptyAttributesImpl() {}
172 public String getValue(int index) { return null; }
173 public String getValue(String qName) { return null; }
174 public String getValue(String uri, String localPart) { return null; }
175 public int getLength() { return 0; }
176 }
177
178 } |
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