|
1
28
29 package com.caucho.xml2;
30
31 import com.caucho.util.CharBuffer;
32
33 import org.xml.sax.ContentHandler  ;
34 import org.xml.sax.Locator ;
35 import org.xml.sax.SAXException ;
36 import org.xml.sax.XMLReader ;
37
38 import javax.xml.namespace.QName ;
39 import java.io.IOException ;
40
41
44 public class SAXBuilder implements XMLWriter, Locator {
45 private XMLReader _saxReader;
46 private ContentHandler _contentHandler;
47
48 private QAttributes _attributes;
49 private CharBuffer _text;
50 private boolean _escapeText;
51
52 private boolean _hasElement;
53
54 private String _elementUri;
55 private String _elementLocalName;
56 private String _elementQName;
57
58 private String _filename;
59 private int _line;
60
61 private String _elementSystemId;
62 private int _elementLine;
63
64 private Locator _locator;
65
66 public SAXBuilder()
67 {
68 _text = new CharBuffer();
69 _attributes = new QAttributes();
70 }
71
72 public SAXBuilder(XMLReader saxReader)
73 {
74 this();
75
76 init(saxReader);
77 }
78
79 public void init(XMLReader saxReader)
80 {
81 _saxReader = saxReader;
82
83 _contentHandler = saxReader.getContentHandler();
84
85 init();
86 }
87
88 public void init()
89 {
90 _text.clear();
91 _attributes.clear();
92 _hasElement = false;
93
94 _filename = null;
95 _line = 0;
96 }
97
98
101 public void setContentHandler(ContentHandler handler)
102 {
103 _contentHandler = handler;
104 }
105
106 public void setDocumentLocator(Locator locator)
107 {
108 _locator = locator;
109 }
110
111 public void startDocument()
112 throws IOException , SAXException
113 {
114 _contentHandler.setDocumentLocator(this);
115 _contentHandler.startDocument();
116 }
117
118 public void endDocument()
119 throws IOException , SAXException
120 {
121 pop();
122
123 _contentHandler.endDocument();
124 }
125
126 public void setLocation(String filename, int line, int column)
127 {
128 _filename = filename;
129 _line = line;
130 }
131
132
135 public String getSystemId()
136 {
137 if (_elementSystemId != null)
138 return _elementSystemId;
139 else if (_locator != null)
140 return _locator.getSystemId();
141 else
142 return _filename;
143 }
144
145
148 public String getPublicId()
149 {
150 if (_locator != null)
151 return _locator.getPublicId();
152 else
153 return null;
154 }
155
156
159 public int getLineNumber()
160 {
161 if (_elementSystemId != null)
162 return _elementLine;
163 else if (_locator != null)
164 return _locator.getLineNumber();
165 else
166 return 0;
167 }
168
169
172 public int getColumnNumber()
173 {
174 if (_locator != null)
175 return _locator.getColumnNumber();
176 else
177 return 0;
178 }
179
180
187 public void startElement(String uri, String localName, String qName)
188 throws IOException , SAXException
189 {
190 pop();
191
192 _elementUri = uri;
193 _elementLocalName = localName;
194 _elementQName = qName;
195 _hasElement = true;
196
197 if (_locator != null) {
198 _elementSystemId = _locator.getSystemId();
199 _elementLine = _locator.getLineNumber();
200 }
201 }
202
203 public void startPrefixMapping(String prefix, String uri)
204 throws IOException , SAXException
205 {
206 _contentHandler.startPrefixMapping(prefix, uri);
207 }
208
209 public void endPrefixMapping(String prefix)
210 throws IOException , SAXException
211 {
212 _contentHandler.endPrefixMapping(prefix);
213 }
214
215 public void attribute(String uri, String localName, String qName,
216 String value)
217 throws IOException , SAXException
218 {
219 QName name = new QName (qName, uri);
220
221 _attributes.add(name, value);
222 }
223
224 public void endElement(String uri, String localName, String qName)
225 throws IOException , SAXException
226 {
227 pop();
228
229 if (uri != null)
230 _contentHandler.endElement(uri, localName, qName);
231 else
232 _contentHandler.endElement("", null, qName);
233 }
234
235 public void processingInstruction(String name, String data)
236 throws IOException , SAXException
237 {
238 pop();
239
240 _contentHandler.processingInstruction(name, data);
241 }
242
243 public void comment(String data)
244 throws IOException , SAXException
245 {
246 pop();
247 }
248
249 public boolean getEscapeText()
250 {
251 return _escapeText;
252 }
253
254 public void setEscapeText(boolean isEscaped)
255 {
256 _escapeText = isEscaped;
257 }
258
259 public void text(String text)
260 throws IOException , SAXException
261 {
262 popElement();
263
264 _text.append(text);
265 }
266
267 public void text(char []buffer, int offset, int length)
268 throws IOException , SAXException
269 {
270 popElement();
271
272 _text.append(buffer, offset, length);
273 }
274
275 public void cdata(String text)
276 throws IOException , SAXException
277 {
278 popElement();
279
280 text(text);
281 }
282
283 public void cdata(char []buffer, int offset, int length)
284 throws IOException , SAXException
285 {
286 popElement();
287
288 text(buffer, offset, length);
289 }
290
291 private void pop()
292 throws IOException , SAXException
293 {
294 popElement();
295
296 if (_text.length() == 0)
297 return;
298
299 _contentHandler.characters(_text.getBuffer(), 0, _text.getLength());
300
301 _text.clear();
302 }
303
304
307 private void popElement()
308 throws IOException , SAXException
309 {
310 if (_hasElement) {
311 if (_elementUri == null)
312 _contentHandler.startElement("", null, _elementQName, _attributes);
313 else
314 _contentHandler.startElement(_elementUri, _elementLocalName,
315 _elementQName, _attributes);
316
317 _hasElement = false;
318 _elementSystemId = null;
319 _attributes.clear();
320 }
321 }
322 }
323 |
Popular Tags |
Java API By Example, From Geeks To Geeks.