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1
28
29 package com.caucho.relaxng;
30
31 import com.caucho.config.BeanBuilderException;
32 import com.caucho.relaxng.pattern.*;
33 import com.caucho.util.CharBuffer;
34 import com.caucho.util.L10N;
35 import com.caucho.xml.QName;
36
37 import org.xml.sax.Attributes  ;
38 import org.xml.sax.SAXException ;
39 import org.xml.sax.helpers.DefaultHandler ;
40
41 import java.util.ArrayList ;
42 import java.util.HashMap ;
43
44
47 public class RelaxBuilder extends DefaultHandler {
48 private static final String RELAX_S = "http://relaxng.org/ns/structure/1.0";
49
50 private static final L10N L = new L10N(RelaxBuilder.class);
51
52 private GrammarPattern _rootGrammar;
53 private GrammarPattern _grammar;
54
55 private Pattern _pattern;
56 private String _ns = "";
57 private HashMap <String ,String > _nsMap = new HashMap <String ,String >();
58
59 private CharBuffer _cb = new CharBuffer();
60
61 private ArrayList <Pattern> _patternStack = new ArrayList <Pattern>();
62 private ArrayList <String > _nsStack = new ArrayList <String >();
63 private ArrayList <HashMap <String ,String >> _nsMapStack
64 = new ArrayList <HashMap <String ,String >>();
65
66 RelaxBuilder()
67 {
68 }
69
70
73 public GrammarPattern getGrammar()
74 {
75 return _rootGrammar;
76 }
77
78 public void startPrefixMapping (String prefix, String uri)
79 throws SAXException
80 {
81 _nsMapStack.add(_nsMap);
82 _nsMap = new HashMap <String ,String >(_nsMap);
83 _nsMap.put(prefix, uri);
84 }
85
86 public void endPrefixMapping(String prefix)
87 throws SAXException
88 {
89 _nsMapStack.add(_nsMap);
90 _nsMap = _nsMapStack.remove(_nsMapStack.size() - 1);
91 }
92
93
96 public void startElement(String uri, String localName,
97 String qName, Attributes attrs)
98 throws SAXException
99 {
100 _cb.clear();
101
102 try {
103 if (RELAX_S.equals(uri)) {
104 _patternStack.add(_pattern);
105 _nsStack.add(_ns);
106
107 String ns = attrs.getValue("ns");
108 if (ns != null)
109 _ns = ns;
110
111 if (localName.equals("grammar")) {
112 _grammar = new GrammarPattern();
113
114 if (_rootGrammar == null)
115 _rootGrammar = _grammar;
116
117 _pattern = null;
118 }
119 else if (localName.equals("start")) {
120 if (_pattern != null || _grammar == null)
121 throw new RelaxException("<start> must be a direct child of <grammar>.");
122
123
124 _pattern = new GroupPattern();
125 _grammar.setStart(_pattern);
126 }
127 else if (localName.equals("define")) {
128 if (_pattern != null || _grammar == null)
129 throw new RelaxException("<define> must be a direct child of <grammar>.");
130
131 String name = attrs.getValue("name");
132 if (name == null || name.equals(""))
133 throw new RelaxException(L.l("<define> requires a `name' attribute."));
134
135 _pattern = new GroupPattern();
136 _grammar.setDefinition(name, _pattern);
137 }
138 else if (localName.equals("name")) {
139 if (_pattern == null)
140 throw new RelaxException("<name> must be child of <element> or <attribute>.");
141
142 _pattern = null;
143 }
144 else if (localName.equals("nsName")) {
145 if (_pattern == null)
146 throw new RelaxException("<nsName> must be child of <element> or <attribute>.");
147
148 _pattern = new NsNamePattern();
149 }
150 else if (localName.equals("anyName")) {
151 if (_pattern == null)
152 throw new RelaxException("<anyName> must be child of <element> or <attribute>.");
153
154 _pattern = new AnyNamePattern();
155 }
156 else if (localName.equals("except")) {
157 if (_pattern == null)
158 throw new RelaxException("<except> must be child of <nsName> or <anyName>.");
159
160 _pattern = new ExcludeNamePattern();
161 }
162 else {
163 if (_grammar == null) {
164 _grammar = new GrammarPattern();
165 _rootGrammar = _grammar;
166 _pattern = new GroupPattern();
167 _grammar.setStart(_pattern);
168
169 _patternStack.set(_patternStack.size() - 1, _pattern);
170 }
171
172 Pattern child = null;
173
174 if (localName.equals("element")) {
175 String name = attrs.getValue("name");
176
177 String defName = _grammar.generateId();
178
179 child = new ElementPattern(defName);
180
181 if (name != null) {
182 QName eltQName = getName(name);
183 child.addNameChild(new NamePattern(eltQName));
184 }
185
186 if (name != null) {
187 QName attrQName = getName(name);
188 child.addNameChild(new NamePattern(attrQName));
189 }
190
191 _grammar.setDefinition(defName, child);
192 }
193 else if (localName.equals("attribute")) {
194 String name = attrs.getValue("name");
195
196 child = new AttributePattern();
197
198 if (name != null) {
199 QName attrQName = new QName(name, _ns);
200 child.addNameChild(new NamePattern(attrQName));
201 }
202 }
203 else if (localName.equals("empty")) {
204 child = new EmptyPattern();
205 }
206 else if (localName.equals("text")) {
207 child = new TextPattern();
208 }
209 else if (localName.equals("data")) {
210 String type = attrs.getValue("type");
211
212 if (type == null)
213 throw new RelaxException(L.l("<data> requires a `type' attribute."));
214
215 child = new DataPattern(type);
216 }
217 else if (localName.equals("value")) {
218 child = new DataPattern("string");
219 }
220 else if (localName.equals("choice")) {
221 if (_pattern instanceof ElementPattern) {
222 ElementPattern eltPattern = (ElementPattern) _pattern;
223
224 if (eltPattern.getNameChild() == null) {
225 child = new ChoiceNamePattern();
226 eltPattern.addNameChild((NameClassPattern) child);
227 _pattern = child;
228 return;
229 }
230 }
231
232 if (_pattern instanceof AttributePattern) {
233 AttributePattern attrPattern = (AttributePattern) _pattern;
234
235 if (attrPattern.getNameChild() == null) {
236 child = new ChoiceNamePattern();
237 attrPattern.addNameChild((NameClassPattern) child);
238 _pattern = child;
239 return;
240 }
241 }
242
243 child = new ChoicePattern();
244 }
245 else if (localName.equals("group")) {
246 child = new GroupPattern();
247 }
248 else if (localName.equals("interleave")) {
249 child = new InterleavePattern();
250 }
251 else if (localName.equals("zeroOrMore")) {
252 child = new ZeroOrMorePattern();
253 }
254 else if (localName.equals("oneOrMore")) {
255 child = new ZeroOrMorePattern();
256 }
257 else if (localName.equals("optional")) {
258 Pattern choice = new ChoicePattern();
259 choice.addChild(new EmptyPattern());
260 choice.setParent(_pattern);
261
262 Pattern group = new GroupPattern();
263 group.setParent(choice);
264 choice.addChild(group);
265 _pattern = group;
266 return;
267 }
268 else if (localName.equals("ref")) {
269 String name = attrs.getValue("name");
270 if (name == null || name.equals(""))
271 throw new RelaxException(L.l("<define> requires a `name' attribute."));
272 child = new RefPattern(_grammar, name);
273 }
274 else
275 throw new BeanBuilderException(L.l("<{0}> is an unknown relax element.",
276 localName));
277
278 child.setParent(_pattern);
279 if (child.getElementName() == null)
280 child.setElementName(_pattern.getElementName());
281
282 _pattern = child;
283 }
284 }
285 } catch (Exception e) {
286 throw new SAXException (getLocation() + e.getMessage(), e);
287 }
288 }
289
290 public void characters (char ch[], int start, int length)
291 throws SAXException
292 {
293 _cb.append(ch, start, length);
294 }
295
296
299 public void endElement(String uri, String localName, String qName)
300 throws SAXException
301 {
302 try {
303 if (RELAX_S.equals(uri)) {
304 NameClassPattern nameChild = null;
305 Pattern child = _pattern;
306 String ns = _ns;
307
308 _pattern = _patternStack.remove(_patternStack.size() - 1);
309 _ns = _nsStack.remove(_nsStack.size() - 1);
310
311 if (localName.equals("name")) {
312 nameChild = new NamePattern(getName(_cb.toString()));
313
314 if (_pattern != null)
315 _pattern.addNameChild(nameChild);
316 }
317 else if (localName.equals("nsName")) {
318 NsNamePattern nsName = (NsNamePattern) child;
319
320 nsName.setNamespace(ns);
321
322 if (_pattern != null)
323 _pattern.addNameChild(nsName);
324 }
325 else if (localName.equals("anyName")) {
326 nameChild = (AnyNamePattern) child;
327
328 if (_pattern != null)
329 _pattern.addNameChild(nameChild);
330 }
331 else if (localName.equals("except")) {
332 ExcludeNamePattern exclude = (ExcludeNamePattern) child;
333
334 if (_pattern instanceof NsNamePattern) {
335 NsNamePattern nsPattern = (NsNamePattern) _pattern;
336
337 nsPattern.setExcept(exclude.getNameChild());
338 }
339
340 if (_pattern instanceof AnyNamePattern) {
341 AnyNamePattern anyNamePattern = (AnyNamePattern) _pattern;
342
343 anyNamePattern.setExcept(exclude.getNameChild());
344 }
345 }
346 else if (localName.equals("optional")) {
347 if (_pattern != null)
348 _pattern.addChild(child.getParent());
349 }
350 else if (localName.equals("oneOrMore")) {
351 ZeroOrMorePattern starPattern = (ZeroOrMorePattern) child;
352 Pattern subPattern = starPattern.getPatterns();
353 Pattern group = new GroupPattern();
354 group.addChild(subPattern);
355 group.addChild(starPattern);
356
357 if (_pattern != null)
358 _pattern.addChild(group);
359 }
360 else if (child instanceof NameClassPattern) {
361 }
362 else {
363 if (child != null)
364 child.endElement();
365
366 if (_pattern != null)
367 _pattern.addChild(child);
368 }
369 }
370 } catch (Exception e) {
371 throw new SAXException (getLocation() + e.getMessage(), e);
372 }
373 }
374
375 private QName getName(String name)
376 {
377 int p = name.lastIndexOf(':');
378
379 if (p > 0) {
380 String prefix = name.substring(0, p);
381 String ns = _nsMap.get(prefix);
382
383 if (ns != null)
384 return new QName(name, ns);
385 else
386 return new QName(name, _ns);
387 }
388 else
389 return new QName(name, _ns);
390 }
391
392
395 public String getLocation()
396 {
397 return "";
398 }
399 }
400 |
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