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