Source Code Cross Referenced for XPointerFrameworkParser.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » components » xpointer » parser » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.components.xpointer.parser 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.cocoon.components.xpointer.parser;
018:
019:        import java.util.HashMap;
020:
021:        import org.apache.cocoon.components.xpointer.ElementPathPart;
022:        import org.apache.cocoon.components.xpointer.ShorthandPart;
023:        import org.apache.cocoon.components.xpointer.UnsupportedPart;
024:        import org.apache.cocoon.components.xpointer.XPointer;
025:        import org.apache.cocoon.components.xpointer.XPointerPart;
026:        import org.apache.cocoon.components.xpointer.XmlnsPart;
027:
028:        public class XPointerFrameworkParser implements 
029:                XPointerFrameworkParserConstants {
030:            private XPointer xpointer = new XPointer();
031:            private HashMap namespaces = new HashMap();
032:
033:            public static void main(String[] args) throws Exception {
034:                System.out.println("will parse this: " + args[0]);
035:                XPointerFrameworkParser xfp = new XPointerFrameworkParser(
036:                        new java.io.StringReader(args[0]));
037:                xfp.pointer();
038:            }
039:
040:            public static XPointer parse(String xpointer) throws ParseException {
041:                XPointerFrameworkParser xfp = new XPointerFrameworkParser(
042:                        new java.io.StringReader(xpointer));
043:                try {
044:                    xfp.pointer();
045:                } catch (TokenMgrError e) {
046:                    // Rethrow TokenMgrErrors as ParseExceptions, because errors aren't caught by Cocoon,
047:                    // and mistyping in a xpointer isn't such a grave error
048:                    throw new ParseException(e.getMessage());
049:                }
050:                return xfp.getXPointer();
051:            }
052:
053:            public XPointer getXPointer() {
054:                return xpointer;
055:            }
056:
057:            private String unescape(String data) throws ParseException {
058:                StringBuffer result = new StringBuffer(data.length());
059:                boolean inCircumflex = false;
060:                for (int i = 0; i < data.length(); i++) {
061:                    char c = data.charAt(i);
062:                    if (inCircumflex) {
063:                        switch (c) {
064:                        case '^':
065:                        case '(':
066:                        case ')':
067:                            result.append(c);
068:                            inCircumflex = false;
069:                            break;
070:                        default:
071:                            throw new ParseException(
072:                                    "Incorrect use of circumflex character at position "
073:                                            + i + " in the string " + data);
074:                        }
075:                    } else if (c == '^') {
076:                        inCircumflex = true;
077:                    } else {
078:                        result.append(c);
079:                    }
080:                }
081:                return result.toString();
082:            }
083:
084:            final public void pointer() throws ParseException {
085:                if (jj_2_1(2)) {
086:                    schemeBased();
087:                } else {
088:                    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
089:                    case NCName:
090:                        shortHand();
091:                        break;
092:                    default:
093:                        jj_la1[0] = jj_gen;
094:                        jj_consume_token(-1);
095:                        throw new ParseException();
096:                    }
097:                }
098:            }
099:
100:            final public void shortHand() throws ParseException {
101:                Token x;
102:                x = jj_consume_token(NCName);
103:                xpointer.addPart(new ShorthandPart(x.image));
104:            }
105:
106:            final public void schemeBased() throws ParseException {
107:                pointerPart();
108:                label_1: while (true) {
109:                    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
110:                    case NCName:
111:                    case WS:
112:                    case QName:
113:                        break;
114:                    default:
115:                        jj_la1[1] = jj_gen;
116:                        break label_1;
117:                    }
118:                    label_2: while (true) {
119:                        switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
120:                        case WS:
121:                            break;
122:                        default:
123:                            jj_la1[2] = jj_gen;
124:                            break label_2;
125:                        }
126:                        jj_consume_token(WS);
127:                    }
128:                    pointerPart();
129:                }
130:            }
131:
132:            final public void pointerPart() throws ParseException {
133:                Token x;
134:                String schemeName;
135:                String schemeData;
136:                switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
137:                case NCName:
138:                    x = jj_consume_token(NCName);
139:                    break;
140:                case QName:
141:                    x = jj_consume_token(QName);
142:                    break;
143:                default:
144:                    jj_la1[3] = jj_gen;
145:                    jj_consume_token(-1);
146:                    throw new ParseException();
147:                }
148:                jj_consume_token(LBRACE);
149:                // when going inside the scheme data, swith to a different lexical state
150:                token_source.switchTo(IN_SCHEME);
151:
152:                // store the scheme name
153:                schemeName = x.image;
154:                schemeData = schemeData();
155:                jj_consume_token(RBRACE);
156:                // when going outside the scheme data, swith back to the default lexical state
157:                token_source.switchTo(DEFAULT);
158:
159:                // parse schemeName in prefix and localName
160:                String schemeNamespace = null, schemeLocalName = null;
161:                int colonPos = schemeName.indexOf(':');
162:                if (colonPos != -1) {
163:                    String schemePrefix = schemeName.substring(0, colonPos);
164:                    schemeNamespace = (String) namespaces.get(schemePrefix);
165:                    schemeLocalName = schemeName.substring(colonPos + 1);
166:                } else {
167:                    schemeLocalName = schemeName;
168:                }
169:
170:                // add the pointer part
171:                if (schemeNamespace == null && schemeLocalName.equals("xmlns")) {
172:                    int eqPos = schemeData.indexOf("=");
173:                    if (eqPos == -1) {
174:                        if (true)
175:                            throw new ParseException(
176:                                    "xmlns scheme data should contain an equals sign");
177:                    }
178:
179:                    // Note: the trimming below is not entirely correct, since space is only allowed left
180:                    // and right of the equal sign, but not at the beginning and end of the schemeData
181:                    String prefix = schemeData.substring(0, eqPos).trim();
182:                    String namespace = schemeData.substring(eqPos + 1,
183:                            schemeData.length()).trim();
184:                    xpointer.addPart(new XmlnsPart(prefix, namespace));
185:                    namespaces.put(prefix, namespace);
186:                } else if (schemeNamespace == null
187:                        && schemeLocalName.equals("xpointer")) {
188:                    xpointer.addPart(new XPointerPart(schemeData));
189:                } else if ("http://apache.org/cocoon/xpointer"
190:                        .equals(schemeNamespace)
191:                        && schemeLocalName.equals("elementpath")) {
192:                    xpointer.addPart(new ElementPathPart(schemeData));
193:                } else {
194:                    xpointer.addPart(new UnsupportedPart(schemeName));
195:                }
196:            }
197:
198:            final public String schemeData() throws ParseException {
199:                String temp;
200:                StringBuffer schemeData = new StringBuffer();
201:                label_3: while (true) {
202:                    switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
203:                    case LBRACE:
204:                    case CIRC_LBRACE:
205:                    case CIRC_RBRACE:
206:                    case DOUBLE_CIRC:
207:                    case NormalChar:
208:                        break;
209:                    default:
210:                        jj_la1[4] = jj_gen;
211:                        break label_3;
212:                    }
213:                    temp = escapedData();
214:                    schemeData.append(temp);
215:                }
216:                {
217:                    if (true)
218:                        return unescape(schemeData.toString());
219:                }
220:                throw new Error("Missing return statement in function");
221:            }
222:
223:            final public String escapedData() throws ParseException {
224:                Token x;
225:                String temp;
226:                StringBuffer data = new StringBuffer();
227:                switch ((jj_ntk == -1) ? jj_ntk() : jj_ntk) {
228:                case NormalChar:
229:                    x = jj_consume_token(NormalChar);
230:                    data.append(x.image);
231:                    break;
232:                case CIRC_LBRACE:
233:                    x = jj_consume_token(CIRC_LBRACE);
234:                    data.append(x.image);
235:                    break;
236:                case CIRC_RBRACE:
237:                    x = jj_consume_token(CIRC_RBRACE);
238:                    data.append(x.image);
239:                    break;
240:                case DOUBLE_CIRC:
241:                    x = jj_consume_token(DOUBLE_CIRC);
242:                    data.append(x.image);
243:                    break;
244:                case LBRACE:
245:                    x = jj_consume_token(LBRACE);
246:                    data.append(x.image);
247:                    temp = schemeData();
248:                    data.append(temp);
249:                    x = jj_consume_token(RBRACE);
250:                    data.append(x.image);
251:                    break;
252:                default:
253:                    jj_la1[5] = jj_gen;
254:                    jj_consume_token(-1);
255:                    throw new ParseException();
256:                }
257:                {
258:                    if (true)
259:                        return data.toString();
260:                }
261:                throw new Error("Missing return statement in function");
262:            }
263:
264:            final private boolean jj_2_1(int xla) {
265:                jj_la = xla;
266:                jj_lastpos = jj_scanpos = token;
267:                boolean retval = !jj_3_1();
268:                jj_save(0, xla);
269:                return retval;
270:            }
271:
272:            final private boolean jj_3R_6() {
273:                if (jj_scan_token(NCName))
274:                    return true;
275:                if (jj_la == 0 && jj_scanpos == jj_lastpos)
276:                    return false;
277:                return false;
278:            }
279:
280:            final private boolean jj_3R_4() {
281:                if (jj_3R_5())
282:                    return true;
283:                if (jj_la == 0 && jj_scanpos == jj_lastpos)
284:                    return false;
285:                return false;
286:            }
287:
288:            final private boolean jj_3R_5() {
289:                Token xsp;
290:                xsp = jj_scanpos;
291:                if (jj_3R_6()) {
292:                    jj_scanpos = xsp;
293:                    if (jj_3R_7())
294:                        return true;
295:                    if (jj_la == 0 && jj_scanpos == jj_lastpos)
296:                        return false;
297:                } else if (jj_la == 0 && jj_scanpos == jj_lastpos)
298:                    return false;
299:                if (jj_scan_token(LBRACE))
300:                    return true;
301:                if (jj_la == 0 && jj_scanpos == jj_lastpos)
302:                    return false;
303:                return false;
304:            }
305:
306:            final private boolean jj_3R_7() {
307:                if (jj_scan_token(QName))
308:                    return true;
309:                if (jj_la == 0 && jj_scanpos == jj_lastpos)
310:                    return false;
311:                return false;
312:            }
313:
314:            final private boolean jj_3_1() {
315:                if (jj_3R_4())
316:                    return true;
317:                if (jj_la == 0 && jj_scanpos == jj_lastpos)
318:                    return false;
319:                return false;
320:            }
321:
322:            public XPointerFrameworkParserTokenManager token_source;
323:            SimpleCharStream jj_input_stream;
324:            public Token token, jj_nt;
325:            private int jj_ntk;
326:            private Token jj_scanpos, jj_lastpos;
327:            private int jj_la;
328:            public boolean lookingAhead = false;
329:            private int jj_gen;
330:            final private int[] jj_la1 = new int[6];
331:            static private int[] jj_la1_0;
332:            static {
333:                jj_la1_0();
334:            }
335:
336:            private static void jj_la1_0() {
337:                jj_la1_0 = new int[] { 0x80, 0x380, 0x100, 0x280, 0xf400,
338:                        0xf400, };
339:            }
340:
341:            final private JJCalls[] jj_2_rtns = new JJCalls[1];
342:            private boolean jj_rescan = false;
343:            private int jj_gc = 0;
344:
345:            public XPointerFrameworkParser(java.io.InputStream stream) {
346:                jj_input_stream = new SimpleCharStream(stream, 1, 1);
347:                token_source = new XPointerFrameworkParserTokenManager(
348:                        jj_input_stream);
349:                token = new Token();
350:                jj_ntk = -1;
351:                jj_gen = 0;
352:                for (int i = 0; i < 6; i++)
353:                    jj_la1[i] = -1;
354:                for (int i = 0; i < jj_2_rtns.length; i++)
355:                    jj_2_rtns[i] = new JJCalls();
356:            }
357:
358:            public void reInit(java.io.InputStream stream) {
359:                jj_input_stream.reInit(stream, 1, 1);
360:                token_source.reInit(jj_input_stream);
361:                token = new Token();
362:                jj_ntk = -1;
363:                jj_gen = 0;
364:                for (int i = 0; i < 6; i++)
365:                    jj_la1[i] = -1;
366:                for (int i = 0; i < jj_2_rtns.length; i++)
367:                    jj_2_rtns[i] = new JJCalls();
368:            }
369:
370:            public XPointerFrameworkParser(java.io.Reader stream) {
371:                jj_input_stream = new SimpleCharStream(stream, 1, 1);
372:                token_source = new XPointerFrameworkParserTokenManager(
373:                        jj_input_stream);
374:                token = new Token();
375:                jj_ntk = -1;
376:                jj_gen = 0;
377:                for (int i = 0; i < 6; i++)
378:                    jj_la1[i] = -1;
379:                for (int i = 0; i < jj_2_rtns.length; i++)
380:                    jj_2_rtns[i] = new JJCalls();
381:            }
382:
383:            public void reInit(java.io.Reader stream) {
384:                jj_input_stream.reInit(stream, 1, 1);
385:                token_source.reInit(jj_input_stream);
386:                token = new Token();
387:                jj_ntk = -1;
388:                jj_gen = 0;
389:                for (int i = 0; i < 6; i++)
390:                    jj_la1[i] = -1;
391:                for (int i = 0; i < jj_2_rtns.length; i++)
392:                    jj_2_rtns[i] = new JJCalls();
393:            }
394:
395:            public XPointerFrameworkParser(
396:                    XPointerFrameworkParserTokenManager tm) {
397:                token_source = tm;
398:                token = new Token();
399:                jj_ntk = -1;
400:                jj_gen = 0;
401:                for (int i = 0; i < 6; i++)
402:                    jj_la1[i] = -1;
403:                for (int i = 0; i < jj_2_rtns.length; i++)
404:                    jj_2_rtns[i] = new JJCalls();
405:            }
406:
407:            public void reInit(XPointerFrameworkParserTokenManager tm) {
408:                token_source = tm;
409:                token = new Token();
410:                jj_ntk = -1;
411:                jj_gen = 0;
412:                for (int i = 0; i < 6; i++)
413:                    jj_la1[i] = -1;
414:                for (int i = 0; i < jj_2_rtns.length; i++)
415:                    jj_2_rtns[i] = new JJCalls();
416:            }
417:
418:            final private Token jj_consume_token(int kind)
419:                    throws ParseException {
420:                Token oldToken;
421:                if ((oldToken = token).next != null)
422:                    token = token.next;
423:                else
424:                    token = token.next = token_source.getNextToken();
425:                jj_ntk = -1;
426:                if (token.kind == kind) {
427:                    jj_gen++;
428:                    if (++jj_gc > 100) {
429:                        jj_gc = 0;
430:                        for (int i = 0; i < jj_2_rtns.length; i++) {
431:                            JJCalls c = jj_2_rtns[i];
432:                            while (c != null) {
433:                                if (c.gen < jj_gen)
434:                                    c.first = null;
435:                                c = c.next;
436:                            }
437:                        }
438:                    }
439:                    return token;
440:                }
441:                token = oldToken;
442:                jj_kind = kind;
443:                throw generateParseException();
444:            }
445:
446:            final private boolean jj_scan_token(int kind) {
447:                if (jj_scanpos == jj_lastpos) {
448:                    jj_la--;
449:                    if (jj_scanpos.next == null) {
450:                        jj_lastpos = jj_scanpos = jj_scanpos.next = token_source
451:                                .getNextToken();
452:                    } else {
453:                        jj_lastpos = jj_scanpos = jj_scanpos.next;
454:                    }
455:                } else {
456:                    jj_scanpos = jj_scanpos.next;
457:                }
458:                if (jj_rescan) {
459:                    int i = 0;
460:                    Token tok = token;
461:                    while (tok != null && tok != jj_scanpos) {
462:                        i++;
463:                        tok = tok.next;
464:                    }
465:                    if (tok != null)
466:                        jj_add_error_token(kind, i);
467:                }
468:                return (jj_scanpos.kind != kind);
469:            }
470:
471:            final public Token getNextToken() {
472:                if (token.next != null)
473:                    token = token.next;
474:                else
475:                    token = token.next = token_source.getNextToken();
476:                jj_ntk = -1;
477:                jj_gen++;
478:                return token;
479:            }
480:
481:            final public Token getToken(int index) {
482:                Token t = lookingAhead ? jj_scanpos : token;
483:                for (int i = 0; i < index; i++) {
484:                    if (t.next != null)
485:                        t = t.next;
486:                    else
487:                        t = t.next = token_source.getNextToken();
488:                }
489:                return t;
490:            }
491:
492:            final private int jj_ntk() {
493:                if ((jj_nt = token.next) == null)
494:                    return (jj_ntk = (token.next = token_source.getNextToken()).kind);
495:                else
496:                    return (jj_ntk = jj_nt.kind);
497:            }
498:
499:            private java.util.Vector jj_expentries = new java.util.Vector();
500:            private int[] jj_expentry;
501:            private int jj_kind = -1;
502:            private int[] jj_lasttokens = new int[100];
503:            private int jj_endpos;
504:
505:            private void jj_add_error_token(int kind, int pos) {
506:                if (pos >= 100)
507:                    return;
508:                if (pos == jj_endpos + 1) {
509:                    jj_lasttokens[jj_endpos++] = kind;
510:                } else if (jj_endpos != 0) {
511:                    jj_expentry = new int[jj_endpos];
512:                    for (int i = 0; i < jj_endpos; i++) {
513:                        jj_expentry[i] = jj_lasttokens[i];
514:                    }
515:                    boolean exists = false;
516:                    for (java.util.Enumeration enumeration = jj_expentries
517:                            .elements(); enumeration.hasMoreElements();) {
518:                        int[] oldentry = (int[]) (enumeration.nextElement());
519:                        if (oldentry.length == jj_expentry.length) {
520:                            exists = true;
521:                            for (int i = 0; i < jj_expentry.length; i++) {
522:                                if (oldentry[i] != jj_expentry[i]) {
523:                                    exists = false;
524:                                    break;
525:                                }
526:                            }
527:                            if (exists)
528:                                break;
529:                        }
530:                    }
531:                    if (!exists)
532:                        jj_expentries.addElement(jj_expentry);
533:                    if (pos != 0)
534:                        jj_lasttokens[(jj_endpos = pos) - 1] = kind;
535:                }
536:            }
537:
538:            public ParseException generateParseException() {
539:                jj_expentries.removeAllElements();
540:                boolean[] la1tokens = new boolean[16];
541:                for (int i = 0; i < 16; i++) {
542:                    la1tokens[i] = false;
543:                }
544:                if (jj_kind >= 0) {
545:                    la1tokens[jj_kind] = true;
546:                    jj_kind = -1;
547:                }
548:                for (int i = 0; i < 6; i++) {
549:                    if (jj_la1[i] == jj_gen) {
550:                        for (int j = 0; j < 32; j++) {
551:                            if ((jj_la1_0[i] & (1 << j)) != 0) {
552:                                la1tokens[j] = true;
553:                            }
554:                        }
555:                    }
556:                }
557:                for (int i = 0; i < 16; i++) {
558:                    if (la1tokens[i]) {
559:                        jj_expentry = new int[1];
560:                        jj_expentry[0] = i;
561:                        jj_expentries.addElement(jj_expentry);
562:                    }
563:                }
564:                jj_endpos = 0;
565:                jj_rescan_token();
566:                jj_add_error_token(0, 0);
567:                int[][] exptokseq = new int[jj_expentries.size()][];
568:                for (int i = 0; i < jj_expentries.size(); i++) {
569:                    exptokseq[i] = (int[]) jj_expentries.elementAt(i);
570:                }
571:                return new ParseException(token, exptokseq, tokenImage);
572:            }
573:
574:            final public void enable_tracing() {
575:            }
576:
577:            final public void disable_tracing() {
578:            }
579:
580:            final private void jj_rescan_token() {
581:                jj_rescan = true;
582:                for (int i = 0; i < 1; i++) {
583:                    JJCalls p = jj_2_rtns[i];
584:                    do {
585:                        if (p.gen > jj_gen) {
586:                            jj_la = p.arg;
587:                            jj_lastpos = jj_scanpos = p.first;
588:                            switch (i) {
589:                            case 0:
590:                                jj_3_1();
591:                                break;
592:                            }
593:                        }
594:                        p = p.next;
595:                    } while (p != null);
596:                }
597:                jj_rescan = false;
598:            }
599:
600:            final private void jj_save(int index, int xla) {
601:                JJCalls p = jj_2_rtns[index];
602:                while (p.gen > jj_gen) {
603:                    if (p.next == null) {
604:                        p = p.next = new JJCalls();
605:                        break;
606:                    }
607:                    p = p.next;
608:                }
609:                p.gen = jj_gen + xla - jj_la;
610:                p.first = token;
611:                p.arg = xla;
612:            }
613:
614:            static final class JJCalls {
615:                int gen;
616:                Token first;
617:                int arg;
618:                JJCalls next;
619:            }
620:
621:        }
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