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1
4 package gnu.kawa.sax;
5 import gnu.lists.*;
6 import gnu.xml.*;
7 import org.xml.sax.*;
8 import gnu.mapping.Symbol;
9 import gnu.text.Char;
10 import org.xml.sax.helpers.AttributesImpl  ;
11
12
14
15 public class ContentConsumer implements Consumer
16 {
17 ContentHandler out;
18
19 int nesting = 0;
20 String [] names = new String [15];
21 String attrQName, attrURI, attrLocalName;
22 AttributesImpl attributes = new AttributesImpl ();
23 char[] chBuffer;
24
25
27 StringBuffer strBuffer = new StringBuffer (200);
28
29
30 int inStartTag;
31
32 public ContentConsumer ()
33 {
34 }
35
36 public ContentConsumer (ContentHandler handler)
37 {
38 out = handler;
39 }
40
41 public void error(String method, SAXException ex)
42 {
43 throw new RuntimeException ("caught "+ex+" in "+method);
44 }
45
46 void endStartTag()
47 {
48 if (inStartTag != 1)
49 return;
50 int i = 3 * (nesting - 1);
51 try
52 {
53 out.startElement(names[i], names[i+1], names[i+2], attributes);
54 }
55 catch (SAXException ex)
56 {
57 error("startElement", ex);
58 }
59 attributes.clear();
60 inStartTag = 0;
61 }
62
63 public void beginGroup(Object type)
64 {
65 if (inStartTag == 1)
66 endStartTag();
67 flushStrBuffer();
68 int i = 3 * nesting;
69 if (i >= names.length)
70 {
71 String [] tmp = new String [2 * i];
72 System.arraycopy(names, 0, tmp, 0, i);
73 names = tmp;
74 }
75 String namespaceURI, localName;
76 if (type instanceof Symbol)
77 {
78 Symbol sym = (Symbol) type;
79 namespaceURI = sym.getNamespaceURI();
80 localName = sym.getLocalName();
81 }
82 else if (type instanceof XName)
83 {
84 XName sym = (XName) type;
85 namespaceURI = sym.getNamespaceURI();
86 localName = sym.getLocalName();
87 }
88 else
89 {
90 namespaceURI = "";
91 localName = type.toString();
92 }
93 names[i] = namespaceURI;
94 names[i+1] = localName;
95 names[i+2] = type.toString();
96 inStartTag = 1;
97 nesting++;
98 }
99
100 public void beginAttribute(Object attrType)
101 {
102 attrURI = ((Symbol) attrType).getNamespaceURI();
103 attrLocalName = ((Symbol) attrType).getLocalName();
104 attrQName = attrType.toString();
105 inStartTag = 2;
106 }
107
108 public void endAttribute()
109 {
110 attributes.addAttribute(attrURI, attrLocalName, attrQName, "CDATA",
111 strBuffer.toString());
112 strBuffer.setLength(0);
113 inStartTag = 1;
114 }
115
116 public void beginDocument()
117 {
118 try
119 {
120 out.startDocument();
121 }
122 catch (SAXException ex)
123 {
124 error("beginDocument", ex);
125 }
126 }
127
128 public void endDocument()
129 {
130 try
131 {
132 out.endDocument();
133 }
134 catch (SAXException ex)
135 {
136 error("endDocument", ex);
137 }
138 }
139
140 public void endGroup()
141 {
142 endStartTag();
143 flushStrBuffer();
144 nesting--;
145 int i = 3 * nesting;
146 try
147 {
148 out.endElement(names[i], names[i+1], names[i+2]);
149 }
150 catch (SAXException ex)
151 {
152 error("endElement", ex);
153 }
154 names[i] = null;
155 names[i+1] = null;
156 names[i+2] = null;
157 }
158
159 void flushStrBuffer()
160 {
161 if (strBuffer.length() > 0)
162 {
163 if (chBuffer == null)
164 chBuffer = new char[200];
165 try
166 {
167 int slen = strBuffer.length();
168 int start = 0;
169 for (;;)
170 {
171 int len = slen - start;
172 if (len <= 0)
173 break;
174 if (len > chBuffer.length)
175 len = chBuffer.length;
176 strBuffer.getChars(start, start + len, chBuffer, start);
177 out.characters(chBuffer, 0, len);
178 start += len;
179 }
180 strBuffer.setLength(0);
181 }
182 catch (SAXException ex)
183 {
184 error("characters", ex);
185 }
186 }
187 }
188
189 public void write(char[] buf, int off, int len)
190 {
191 if (inStartTag == 1)
192 endStartTag();
193 if (inStartTag == 2)
194 strBuffer.append(buf, off, len);
195 else
196 {
197 flushStrBuffer();
198 try
199 {
200 out.characters(buf, off, len);
201 }
202 catch (SAXException ex)
203 {
204 error("characters", ex);
205 }
206 }
207 }
208
209 public void write (int v)
210 {
211 if (inStartTag == 1)
212 endStartTag();
213 if (v >= 0x10000)
214 {
215 strBuffer.append((char) (((v - 0x10000) >> 10) + 0xD800));
216 v = (v & 0x3FF) + 0xDC00;
217 }
218 strBuffer.append((char) v);
219 }
220
221 public void write (String v)
222 {
223 if (inStartTag == 1)
224 endStartTag();
225 strBuffer.append(v);
226 }
227
228
229 public void write (CharSequence str, int start, int end)
230
231
233 {
234 if (inStartTag == 1)
235 endStartTag();
236
237
238
240 strBuffer.append(str.subSequence(start, end).toString());
241
242
243
245 }
246
247
248
268
269 public void writeObject(Object v)
270 {
271 if (v instanceof Consumable)
273 ((Consumable) v).consume(this);
274 else if (v instanceof SeqPosition)
275 {
276 SeqPosition pos = (SeqPosition) v;
277 pos.sequence.consumeNext(pos.ipos, this);
278 }
279 else if (v instanceof Char)
280 ((Char) v).print(this);
281 else
282 write(v == null ? "(null)" : v.toString());
283 }
284
285 public void writeBoolean(boolean v)
286 {
287 if (inStartTag == 1)
288 endStartTag();
289 strBuffer.append(v);
291 }
292
293 public void writeLong(long v)
294 {
295 if (inStartTag == 1)
296 endStartTag();
297 strBuffer.append(v);
299 }
300
301 public void writeInt(int v)
302 {
303 if (inStartTag == 1)
304 endStartTag();
305 strBuffer.append(v);
307 }
308
309 public void writeFloat(float v)
310 {
311 if (inStartTag == 1)
312 endStartTag();
313 strBuffer.append(v);
315 }
316
317 public void writeDouble(double v)
318 {
319 if (inStartTag == 1)
320 endStartTag();
321 strBuffer.append(v);
323 }
324
325 public void finalize()
326 {
327 flushStrBuffer();
328 }
329
330 public boolean ignoring ()
331 {
332 return false;
333 }
334
335 public void setContentHandler (ContentHandler handler)
336 {
337 out = handler;
338 }
339
340 public ContentHandler getContentHandler ()
341 {
342 return out;
343 }
344 }
345 |
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