Source Code Cross Referenced for RelaxBuilder.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » relaxng » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.relaxng 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.relaxng;
030:
031:        import com.caucho.config.ConfigException;
032:        import com.caucho.relaxng.pattern.*;
033:        import com.caucho.util.CharBuffer;
034:        import com.caucho.util.L10N;
035:        import com.caucho.xml.QName;
036:
037:        import org.xml.sax.Attributes;
038:        import org.xml.sax.SAXException;
039:        import org.xml.sax.helpers.DefaultHandler;
040:
041:        import java.util.ArrayList;
042:        import java.util.HashMap;
043:
044:        /**
045:         * Builder for the relax.
046:         */
047:        public class RelaxBuilder extends DefaultHandler {
048:            private static final String RELAX_S = "http://relaxng.org/ns/structure/1.0";
049:
050:            private static final L10N L = new L10N(RelaxBuilder.class);
051:
052:            private GrammarPattern _rootGrammar;
053:            private GrammarPattern _grammar;
054:
055:            private Pattern _pattern;
056:            private String _ns = "";
057:            private HashMap<String, String> _nsMap = new HashMap<String, String>();
058:
059:            private CharBuffer _cb = new CharBuffer();
060:
061:            private ArrayList<Pattern> _patternStack = new ArrayList<Pattern>();
062:            private ArrayList<String> _nsStack = new ArrayList<String>();
063:            private ArrayList<HashMap<String, String>> _nsMapStack = new ArrayList<HashMap<String, String>>();
064:
065:            RelaxBuilder() {
066:            }
067:
068:            /**
069:             * Gets the root pattern.
070:             */
071:            public GrammarPattern getGrammar() {
072:                return _rootGrammar;
073:            }
074:
075:            public void startPrefixMapping(String prefix, String uri)
076:                    throws SAXException {
077:                _nsMapStack.add(_nsMap);
078:                _nsMap = new HashMap<String, String>(_nsMap);
079:                _nsMap.put(prefix, uri);
080:            }
081:
082:            public void endPrefixMapping(String prefix) throws SAXException {
083:                _nsMapStack.add(_nsMap);
084:                _nsMap = _nsMapStack.remove(_nsMapStack.size() - 1);
085:            }
086:
087:            /**
088:             * handles new element.
089:             */
090:            public void startElement(String uri, String localName,
091:                    String qName, Attributes attrs) throws SAXException {
092:                _cb.clear();
093:
094:                try {
095:                    if (RELAX_S.equals(uri)) {
096:                        _patternStack.add(_pattern);
097:                        _nsStack.add(_ns);
098:
099:                        String ns = attrs.getValue("ns");
100:                        if (ns != null)
101:                            _ns = ns;
102:
103:                        if (localName.equals("grammar")) {
104:                            _grammar = new GrammarPattern();
105:
106:                            if (_rootGrammar == null)
107:                                _rootGrammar = _grammar;
108:
109:                            _pattern = null;
110:                        } else if (localName.equals("start")) {
111:                            if (_pattern != null || _grammar == null)
112:                                throw new RelaxException(
113:                                        "<start> must be a direct child of <grammar>.");
114:
115:                            _pattern = new GroupPattern();
116:                            _grammar.setStart(_pattern);
117:                        } else if (localName.equals("define")) {
118:                            if (_pattern != null || _grammar == null)
119:                                throw new RelaxException(
120:                                        "<define> must be a direct child of <grammar>.");
121:
122:                            String name = attrs.getValue("name");
123:                            if (name == null || name.equals(""))
124:                                throw new RelaxException(
125:                                        L
126:                                                .l("<define> requires a `name' attribute."));
127:
128:                            _pattern = new GroupPattern();
129:                            _grammar.setDefinition(name, _pattern);
130:                        } else if (localName.equals("name")) {
131:                            if (_pattern == null)
132:                                throw new RelaxException(
133:                                        "<name> must be child of <element> or <attribute>.");
134:
135:                            _pattern = null;
136:                        } else if (localName.equals("nsName")) {
137:                            if (_pattern == null)
138:                                throw new RelaxException(
139:                                        "<nsName> must be child of <element> or <attribute>.");
140:
141:                            _pattern = new NsNamePattern();
142:                        } else if (localName.equals("anyName")) {
143:                            if (_pattern == null)
144:                                throw new RelaxException(
145:                                        "<anyName> must be child of <element> or <attribute>.");
146:
147:                            _pattern = new AnyNamePattern();
148:                        } else if (localName.equals("except")) {
149:                            if (_pattern == null)
150:                                throw new RelaxException(
151:                                        "<except> must be child of <nsName> or <anyName>.");
152:
153:                            _pattern = new ExcludeNamePattern();
154:                        } else {
155:                            if (_grammar == null) {
156:                                _grammar = new GrammarPattern();
157:                                _rootGrammar = _grammar;
158:                                _pattern = new GroupPattern();
159:                                _grammar.setStart(_pattern);
160:
161:                                _patternStack.set(_patternStack.size() - 1,
162:                                        _pattern);
163:                            }
164:
165:                            Pattern child = null;
166:
167:                            if (localName.equals("element")) {
168:                                String name = attrs.getValue("name");
169:
170:                                String defName = _grammar.generateId();
171:
172:                                child = new ElementPattern(defName);
173:
174:                                if (name != null) {
175:                                    QName eltQName = getName(name);
176:                                    child
177:                                            .addNameChild(new NamePattern(
178:                                                    eltQName));
179:                                }
180:
181:                                if (name != null) {
182:                                    QName attrQName = getName(name);
183:                                    child.addNameChild(new NamePattern(
184:                                            attrQName));
185:                                }
186:
187:                                _grammar.setDefinition(defName, child);
188:                            } else if (localName.equals("attribute")) {
189:                                String name = attrs.getValue("name");
190:
191:                                child = new AttributePattern();
192:
193:                                if (name != null) {
194:                                    QName attrQName = new QName(name, _ns);
195:                                    child.addNameChild(new NamePattern(
196:                                            attrQName));
197:                                }
198:                            } else if (localName.equals("empty")) {
199:                                child = new EmptyPattern();
200:                            } else if (localName.equals("text")) {
201:                                child = new TextPattern();
202:                            } else if (localName.equals("data")) {
203:                                String type = attrs.getValue("type");
204:
205:                                if (type == null)
206:                                    throw new RelaxException(
207:                                            L
208:                                                    .l("<data> requires a `type' attribute."));
209:
210:                                child = new DataPattern(type);
211:                            } else if (localName.equals("value")) {
212:                                child = new DataPattern("string");
213:                            } else if (localName.equals("choice")) {
214:                                if (_pattern instanceof  ElementPattern) {
215:                                    ElementPattern eltPattern = (ElementPattern) _pattern;
216:
217:                                    if (eltPattern.getNameChild() == null) {
218:                                        child = new ChoiceNamePattern();
219:                                        eltPattern
220:                                                .addNameChild((NameClassPattern) child);
221:                                        _pattern = child;
222:                                        return;
223:                                    }
224:                                }
225:
226:                                if (_pattern instanceof  AttributePattern) {
227:                                    AttributePattern attrPattern = (AttributePattern) _pattern;
228:
229:                                    if (attrPattern.getNameChild() == null) {
230:                                        child = new ChoiceNamePattern();
231:                                        attrPattern
232:                                                .addNameChild((NameClassPattern) child);
233:                                        _pattern = child;
234:                                        return;
235:                                    }
236:                                }
237:
238:                                child = new ChoicePattern();
239:                            } else if (localName.equals("group")) {
240:                                child = new GroupPattern();
241:                            } else if (localName.equals("interleave")) {
242:                                child = new InterleavePattern();
243:                            } else if (localName.equals("zeroOrMore")) {
244:                                child = new ZeroOrMorePattern();
245:                            } else if (localName.equals("oneOrMore")) {
246:                                child = new ZeroOrMorePattern();
247:                            } else if (localName.equals("optional")) {
248:                                Pattern choice = new ChoicePattern();
249:                                choice.addChild(new EmptyPattern());
250:                                choice.setParent(_pattern);
251:
252:                                Pattern group = new GroupPattern();
253:                                group.setParent(choice);
254:                                choice.addChild(group);
255:                                _pattern = group;
256:                                return;
257:                            } else if (localName.equals("ref")) {
258:                                String name = attrs.getValue("name");
259:                                if (name == null || name.equals(""))
260:                                    throw new RelaxException(
261:                                            L
262:                                                    .l("<define> requires a `name' attribute."));
263:                                child = new RefPattern(_grammar, name);
264:                            } else
265:                                throw new ConfigException(L.l(
266:                                        "<{0}> is an unknown relax element.",
267:                                        localName));
268:
269:                            child.setParent(_pattern);
270:                            if (child.getElementName() == null)
271:                                child.setElementName(_pattern.getElementName());
272:
273:                            _pattern = child;
274:                        }
275:                    }
276:                } catch (Exception e) {
277:                    throw new SAXException(getLocation() + e.getMessage(), e);
278:                }
279:            }
280:
281:            public void characters(char ch[], int start, int length)
282:                    throws SAXException {
283:                _cb.append(ch, start, length);
284:            }
285:
286:            /**
287:             * handles the end of an element.
288:             */
289:            public void endElement(String uri, String localName, String qName)
290:                    throws SAXException {
291:                try {
292:                    if (RELAX_S.equals(uri)) {
293:                        NameClassPattern nameChild = null;
294:                        Pattern child = _pattern;
295:                        String ns = _ns;
296:
297:                        _pattern = _patternStack
298:                                .remove(_patternStack.size() - 1);
299:                        _ns = _nsStack.remove(_nsStack.size() - 1);
300:
301:                        if (localName.equals("name")) {
302:                            nameChild = new NamePattern(getName(_cb.toString()));
303:
304:                            if (_pattern != null)
305:                                _pattern.addNameChild(nameChild);
306:                        } else if (localName.equals("nsName")) {
307:                            NsNamePattern nsName = (NsNamePattern) child;
308:
309:                            nsName.setNamespace(ns);
310:
311:                            if (_pattern != null)
312:                                _pattern.addNameChild(nsName);
313:                        } else if (localName.equals("anyName")) {
314:                            nameChild = (AnyNamePattern) child;
315:
316:                            if (_pattern != null)
317:                                _pattern.addNameChild(nameChild);
318:                        } else if (localName.equals("except")) {
319:                            ExcludeNamePattern exclude = (ExcludeNamePattern) child;
320:
321:                            if (_pattern instanceof  NsNamePattern) {
322:                                NsNamePattern nsPattern = (NsNamePattern) _pattern;
323:
324:                                nsPattern.setExcept(exclude.getNameChild());
325:                            }
326:
327:                            if (_pattern instanceof  AnyNamePattern) {
328:                                AnyNamePattern anyNamePattern = (AnyNamePattern) _pattern;
329:
330:                                anyNamePattern
331:                                        .setExcept(exclude.getNameChild());
332:                            }
333:                        } else if (localName.equals("optional")) {
334:                            if (_pattern != null)
335:                                _pattern.addChild(child.getParent());
336:                        } else if (localName.equals("oneOrMore")) {
337:                            ZeroOrMorePattern starPattern = (ZeroOrMorePattern) child;
338:                            Pattern subPattern = starPattern.getPatterns();
339:                            Pattern group = new GroupPattern();
340:                            group.addChild(subPattern);
341:                            group.addChild(starPattern);
342:
343:                            if (_pattern != null)
344:                                _pattern.addChild(group);
345:                        } else if (child instanceof  NameClassPattern) {
346:                        } else {
347:                            if (child != null)
348:                                child.endElement();
349:
350:                            if (_pattern != null)
351:                                _pattern.addChild(child);
352:                        }
353:                    }
354:                } catch (Exception e) {
355:                    throw new SAXException(getLocation() + e.getMessage(), e);
356:                }
357:            }
358:
359:            private QName getName(String name) {
360:                int p = name.lastIndexOf(':');
361:
362:                if (p > 0) {
363:                    String prefix = name.substring(0, p);
364:                    String ns = _nsMap.get(prefix);
365:
366:                    if (ns != null)
367:                        return new QName(name, ns);
368:                    else
369:                        return new QName(name, _ns);
370:                } else
371:                    return new QName(name, _ns);
372:            }
373:
374:            /**
375:             * Returns the location.
376:             */
377:            public String getLocation() {
378:                return "";
379:            }
380:        }
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