Source Code Cross Referenced for Annotation.java in  » Byte-Code » Cojen » org » cojen » classfile » attribute » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Byte Code » Cojen » org.cojen.classfile.attribute 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Copyright 2005 Brian S O'Neill
003:         *
004:         *  Licensed under the Apache License, Version 2.0 (the "License");
005:         *  you may not use this file except in compliance with the License.
006:         *  You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         *  Unless required by applicable law or agreed to in writing, software
011:         *  distributed under the License is distributed on an "AS IS" BASIS,
012:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         *  See the License for the specific language governing permissions and
014:         *  limitations under the License.
015:         */
016:
017:        package org.cojen.classfile.attribute;
018:
019:        import java.io.DataInput;
020:        import java.io.DataOutput;
021:        import java.io.IOException;
022:        import java.util.Collections;
023:        import java.util.Iterator;
024:        import java.util.LinkedHashMap;
025:        import java.util.Map;
026:        import org.cojen.classfile.ConstantInfo;
027:        import org.cojen.classfile.ConstantPool;
028:        import org.cojen.classfile.TypeDesc;
029:        import org.cojen.classfile.constant.ConstantClassInfo;
030:        import org.cojen.classfile.constant.ConstantDoubleInfo;
031:        import org.cojen.classfile.constant.ConstantFloatInfo;
032:        import org.cojen.classfile.constant.ConstantIntegerInfo;
033:        import org.cojen.classfile.constant.ConstantLongInfo;
034:        import org.cojen.classfile.constant.ConstantUTFInfo;
035:
036:        /**
037:         * Defines the annotation structure used by Java 5 annotations attributes.
038:         *
039:         * @author Brian S O'Neill
040:         */
041:        public class Annotation {
042:
043:            /** Member value is represented by a ConstantIntegerInfo */
044:            public static final char MEMBER_TAG_BOOLEAN = 'Z';
045:
046:            /** Member value is represented by a ConstantIntegerInfo */
047:            public static final char MEMBER_TAG_BYTE = 'B';
048:
049:            /** Member value is represented by a ConstantIntegerInfo */
050:            public static final char MEMBER_TAG_SHORT = 'S';
051:
052:            /** Member value is represented by a ConstantIntegerInfo */
053:            public static final char MEMBER_TAG_CHAR = 'C';
054:
055:            /** Member value is represented by a ConstantIntegerInfo */
056:            public static final char MEMBER_TAG_INT = 'I';
057:
058:            /** Member value is represented by a ConstantLongInfo */
059:            public static final char MEMBER_TAG_LONG = 'J';
060:
061:            /** Member value is represented by a ConstantFloatInfo */
062:            public static final char MEMBER_TAG_FLOAT = 'F';
063:
064:            /** Member value is represented by a ConstantDoubleInfo */
065:            public static final char MEMBER_TAG_DOUBLE = 'D';
066:
067:            /** Member value is represented by a ConstantUTFInfo */
068:            public static final char MEMBER_TAG_STRING = 's';
069:
070:            /** Member value is represented by a ConstantClassInfo */
071:            public static final char MEMBER_TAG_CLASS = 'c';
072:
073:            /** Member value is represented by an EnumConstValue */
074:            public static final char MEMBER_TAG_ENUM = 'e';
075:
076:            /** Member value is represented by a MemberValue array */
077:            public static final char MEMBER_TAG_ARRAY = '[';
078:
079:            /** Member value is represented by an Annotation */
080:            public static final char MEMBER_TAG_ANNOTATION = '@';
081:
082:            private final ConstantPool mCp;
083:            private ConstantUTFInfo mType;
084:            private final Map mMemberValues;
085:
086:            public Annotation(ConstantPool cp) {
087:                mCp = cp;
088:                mMemberValues = new LinkedHashMap(2);
089:            }
090:
091:            public Annotation(ConstantPool cp, DataInput din)
092:                    throws IOException {
093:                mCp = cp;
094:                mType = (ConstantUTFInfo) cp.getConstant(din
095:                        .readUnsignedShort());
096:
097:                int memberCount = din.readUnsignedShort();
098:                mMemberValues = new LinkedHashMap(memberCount);
099:
100:                for (int i = 0; i < memberCount; i++) {
101:                    String name = ((ConstantUTFInfo) cp.getConstant(din
102:                            .readUnsignedShort())).getValue();
103:                    mMemberValues.put(name, new MemberValue(cp, din));
104:                }
105:            }
106:
107:            public ConstantUTFInfo getTypeConstant() {
108:                return mType;
109:            }
110:
111:            public TypeDesc getType() {
112:                return TypeDesc.forDescriptor(mType.getValue());
113:            }
114:
115:            public void setTypeConstant(ConstantUTFInfo type) {
116:                mType = type;
117:            }
118:
119:            public void setType(TypeDesc type) {
120:                setTypeConstant(mCp.addConstantUTF(type.getDescriptor()));
121:            }
122:
123:            /**
124:             * Returns an unmodifiable map of member names (String) to MemberValue
125:             * objects.
126:             */
127:            public Map getMemberValues() {
128:                return Collections.unmodifiableMap(mMemberValues);
129:            }
130:
131:            public void putMemberValue(String name, MemberValue mv) {
132:                mCp.addConstantUTF(name);
133:                mMemberValues.put(name, mv);
134:            }
135:
136:            public void putMemberValue(String name, boolean value) {
137:                mCp.addConstantUTF(name);
138:                mMemberValues.put(name, makeMemberValue(value));
139:            }
140:
141:            public void putMemberValue(String name, byte value) {
142:                mCp.addConstantUTF(name);
143:                mMemberValues.put(name, makeMemberValue(value));
144:            }
145:
146:            public void putMemberValue(String name, short value) {
147:                mCp.addConstantUTF(name);
148:                mMemberValues.put(name, makeMemberValue(value));
149:            }
150:
151:            public void putMemberValue(String name, char value) {
152:                mCp.addConstantUTF(name);
153:                mMemberValues.put(name, makeMemberValue(value));
154:            }
155:
156:            public void putMemberValue(String name, int value) {
157:                mCp.addConstantUTF(name);
158:                mMemberValues.put(name, makeMemberValue(value));
159:            }
160:
161:            public void putMemberValue(String name, long value) {
162:                mCp.addConstantUTF(name);
163:                mMemberValues.put(name, makeMemberValue(value));
164:            }
165:
166:            public void putMemberValue(String name, float value) {
167:                mCp.addConstantUTF(name);
168:                mMemberValues.put(name, makeMemberValue(value));
169:            }
170:
171:            public void putMemberValue(String name, double value) {
172:                mCp.addConstantUTF(name);
173:                mMemberValues.put(name, makeMemberValue(value));
174:            }
175:
176:            public void putMemberValue(String name, String value) {
177:                mCp.addConstantUTF(name);
178:                mMemberValues.put(name, makeMemberValue(value));
179:            }
180:
181:            public void putMemberValue(String name, TypeDesc value) {
182:                mCp.addConstantUTF(name);
183:                mMemberValues.put(name, makeMemberValue(value));
184:            }
185:
186:            public void putMemberValue(String name, MemberValue[] value) {
187:                mCp.addConstantUTF(name);
188:                mMemberValues.put(name, makeMemberValue(value));
189:            }
190:
191:            public void putMemberValue(String name, TypeDesc enumType,
192:                    String enumName) {
193:                mCp.addConstantUTF(name);
194:                mMemberValues.put(name, makeMemberValue(enumType, enumName));
195:            }
196:
197:            /**
198:             * @see #makeAnnotation
199:             */
200:            public void putMemberValue(String name, Annotation value) {
201:                mCp.addConstantUTF(name);
202:                mMemberValues.put(name, makeMemberValue(value));
203:            }
204:
205:            public MemberValue makeMemberValue(boolean value) {
206:                return new MemberValue(MEMBER_TAG_BOOLEAN, mCp
207:                        .addConstantInteger(value ? 1 : 0));
208:            }
209:
210:            public MemberValue makeMemberValue(byte value) {
211:                return new MemberValue(MEMBER_TAG_BYTE, mCp
212:                        .addConstantInteger(value));
213:            }
214:
215:            public MemberValue makeMemberValue(short value) {
216:                return new MemberValue(MEMBER_TAG_SHORT, mCp
217:                        .addConstantInteger(value));
218:            }
219:
220:            public MemberValue makeMemberValue(char value) {
221:                return new MemberValue(MEMBER_TAG_CHAR, mCp
222:                        .addConstantInteger(value));
223:            }
224:
225:            public MemberValue makeMemberValue(int value) {
226:                return new MemberValue(MEMBER_TAG_INT, mCp
227:                        .addConstantInteger(value));
228:            }
229:
230:            public MemberValue makeMemberValue(long value) {
231:                return new MemberValue(MEMBER_TAG_LONG, mCp
232:                        .addConstantLong(value));
233:            }
234:
235:            public MemberValue makeMemberValue(float value) {
236:                return new MemberValue(MEMBER_TAG_FLOAT, mCp
237:                        .addConstantFloat(value));
238:            }
239:
240:            public MemberValue makeMemberValue(double value) {
241:                return new MemberValue(MEMBER_TAG_DOUBLE, mCp
242:                        .addConstantDouble(value));
243:            }
244:
245:            public MemberValue makeMemberValue(String value) {
246:                return new MemberValue(MEMBER_TAG_STRING, mCp
247:                        .addConstantUTF(value));
248:            }
249:
250:            public MemberValue makeMemberValue(TypeDesc value) {
251:                return new MemberValue(MEMBER_TAG_CLASS, mCp
252:                        .addConstantUTF(value.getDescriptor()));
253:            }
254:
255:            public MemberValue makeMemberValue(TypeDesc enumType,
256:                    String enumName) {
257:                return new MemberValue(MEMBER_TAG_ENUM, new EnumConstValue(mCp
258:                        .addConstantUTF(enumType.getDescriptor()), mCp
259:                        .addConstantUTF(enumName)));
260:            }
261:
262:            public MemberValue makeMemberValue(MemberValue[] value) {
263:                return new MemberValue(MEMBER_TAG_ARRAY, value);
264:            }
265:
266:            /**
267:             * @see #makeAnnotation
268:             */
269:            public MemberValue makeMemberValue(Annotation value) {
270:                return new MemberValue(MEMBER_TAG_ANNOTATION, value);
271:            }
272:
273:            public Annotation makeAnnotation() {
274:                return new Annotation(mCp);
275:            }
276:
277:            public int getLength() {
278:                int length = 4;
279:                Iterator it = mMemberValues.values().iterator();
280:                while (it.hasNext()) {
281:                    length += 2 + ((MemberValue) it.next()).getLength();
282:                }
283:                return length;
284:            }
285:
286:            public void writeTo(DataOutput dout) throws IOException {
287:                dout.writeShort(mType.getIndex());
288:                int memberCount = mMemberValues.size();
289:                dout.writeShort(memberCount);
290:                Iterator it = mMemberValues.entrySet().iterator();
291:                while (it.hasNext()) {
292:                    Map.Entry entry = (Map.Entry) it.next();
293:                    String name = (String) entry.getKey();
294:                    MemberValue value = (MemberValue) entry.getValue();
295:                    dout.writeShort(mCp.addConstantUTF(name).getIndex());
296:                    value.writeTo(dout);
297:                }
298:            }
299:
300:            public static class MemberValue {
301:                private final char mTag;
302:                private final Object mValue;
303:
304:                public MemberValue(char tag, Object value) {
305:                    switch (mTag = tag) {
306:                    default:
307:                        throw new IllegalArgumentException(
308:                                "Illegal annotation member value tag: " + mTag);
309:
310:                    case MEMBER_TAG_BOOLEAN:
311:                    case MEMBER_TAG_BYTE:
312:                    case MEMBER_TAG_SHORT:
313:                    case MEMBER_TAG_CHAR:
314:                    case MEMBER_TAG_INT:
315:                        if (value instanceof  ConstantIntegerInfo) {
316:                            mValue = value;
317:                        } else {
318:                            throw new IllegalArgumentException(
319:                                    "Value must be ConstantIntegerInfo");
320:                        }
321:                        break;
322:
323:                    case MEMBER_TAG_LONG:
324:                        if (value instanceof  ConstantLongInfo) {
325:                            mValue = value;
326:                        } else {
327:                            throw new IllegalArgumentException(
328:                                    "Value must be ConstantLongInfo");
329:                        }
330:                        break;
331:
332:                    case MEMBER_TAG_FLOAT:
333:                        if (value instanceof  ConstantFloatInfo) {
334:                            mValue = value;
335:                        } else {
336:                            throw new IllegalArgumentException(
337:                                    "Value must be ConstantFloatInfo");
338:                        }
339:                        break;
340:
341:                    case MEMBER_TAG_DOUBLE:
342:                        if (value instanceof  ConstantDoubleInfo) {
343:                            mValue = value;
344:                        } else {
345:                            throw new IllegalArgumentException(
346:                                    "Value must be ConstantDoubleInfo");
347:                        }
348:                        break;
349:
350:                    case MEMBER_TAG_CLASS:
351:                        if (value instanceof  ConstantUTFInfo) {
352:                            mValue = value;
353:                        } else {
354:                            throw new IllegalArgumentException(
355:                                    "Value must be ConstantUTFInfo");
356:                        }
357:                        break;
358:
359:                    case MEMBER_TAG_STRING:
360:                        if (value instanceof  ConstantUTFInfo) {
361:                            mValue = value;
362:                        } else {
363:                            throw new IllegalArgumentException(
364:                                    "Value must be ConstantUTFInfo");
365:                        }
366:                        break;
367:
368:                    case MEMBER_TAG_ENUM:
369:                        if (value instanceof  EnumConstValue) {
370:                            mValue = value;
371:                        } else {
372:                            throw new IllegalArgumentException(
373:                                    "Value must be EnumConstValue");
374:                        }
375:                        break;
376:
377:                    case MEMBER_TAG_ARRAY:
378:                        if (value instanceof  MemberValue[]) {
379:                            mValue = value;
380:                        } else {
381:                            throw new IllegalArgumentException(
382:                                    "Value must be MemberValue[]");
383:                        }
384:                        break;
385:
386:                    case MEMBER_TAG_ANNOTATION:
387:                        if (value instanceof  Annotation) {
388:                            mValue = value;
389:                        } else {
390:                            throw new IllegalArgumentException(
391:                                    "Value must be Annotation");
392:                        }
393:                        break;
394:                    }
395:                }
396:
397:                public MemberValue(ConstantPool cp, DataInput din)
398:                        throws IOException {
399:                    switch (mTag = (char) din.readUnsignedByte()) {
400:                    default:
401:                        throw new IllegalStateException(
402:                                "Illegal annotation member value tag: " + mTag);
403:
404:                    case MEMBER_TAG_BOOLEAN:
405:                    case MEMBER_TAG_BYTE:
406:                    case MEMBER_TAG_SHORT:
407:                    case MEMBER_TAG_CHAR:
408:                    case MEMBER_TAG_INT:
409:                    case MEMBER_TAG_LONG:
410:                    case MEMBER_TAG_FLOAT:
411:                    case MEMBER_TAG_DOUBLE:
412:                    case MEMBER_TAG_CLASS:
413:                    case MEMBER_TAG_STRING:
414:                        mValue = cp.getConstant(din.readUnsignedShort());
415:                        break;
416:
417:                    case MEMBER_TAG_ENUM:
418:                        mValue = new EnumConstValue(cp, din);
419:                        break;
420:
421:                    case MEMBER_TAG_ARRAY:
422:                        int length = din.readUnsignedShort();
423:                        MemberValue[] values = new MemberValue[length];
424:                        for (int i = 0; i < length; i++) {
425:                            values[i] = new MemberValue(cp, din);
426:                        }
427:                        mValue = values;
428:                        break;
429:
430:                    case MEMBER_TAG_ANNOTATION:
431:                        mValue = new Annotation(cp, din);
432:                        break;
433:                    }
434:                }
435:
436:                public char getTag() {
437:                    return mTag;
438:                }
439:
440:                public Object getValue() {
441:                    return mValue;
442:                }
443:
444:                public int getLength() {
445:                    switch (mTag) {
446:                    default:
447:                        return 1;
448:
449:                    case MEMBER_TAG_BOOLEAN:
450:                    case MEMBER_TAG_BYTE:
451:                    case MEMBER_TAG_SHORT:
452:                    case MEMBER_TAG_CHAR:
453:                    case MEMBER_TAG_INT:
454:                    case MEMBER_TAG_LONG:
455:                    case MEMBER_TAG_FLOAT:
456:                    case MEMBER_TAG_DOUBLE:
457:                    case MEMBER_TAG_CLASS:
458:                    case MEMBER_TAG_STRING:
459:                        return 3;
460:
461:                    case MEMBER_TAG_ENUM:
462:                        return 1 + ((EnumConstValue) mValue).getLength();
463:
464:                    case MEMBER_TAG_ARRAY: {
465:                        MemberValue[] values = (MemberValue[]) mValue;
466:                        int length = 3;
467:                        for (int i = 0; i < values.length; i++) {
468:                            length += values[i].getLength();
469:                        }
470:                        return length;
471:                    }
472:
473:                    case MEMBER_TAG_ANNOTATION:
474:                        return 1 + ((Annotation) mValue).getLength();
475:                    }
476:                }
477:
478:                public void writeTo(DataOutput dout) throws IOException {
479:                    dout.writeByte(mTag);
480:
481:                    switch (mTag) {
482:                    case MEMBER_TAG_BOOLEAN:
483:                    case MEMBER_TAG_BYTE:
484:                    case MEMBER_TAG_SHORT:
485:                    case MEMBER_TAG_CHAR:
486:                    case MEMBER_TAG_INT:
487:                    case MEMBER_TAG_LONG:
488:                    case MEMBER_TAG_FLOAT:
489:                    case MEMBER_TAG_DOUBLE:
490:                    case MEMBER_TAG_CLASS:
491:                    case MEMBER_TAG_STRING:
492:                        dout.writeShort(((ConstantInfo) mValue).getIndex());
493:                        break;
494:
495:                    case MEMBER_TAG_ENUM:
496:                        ((EnumConstValue) mValue).writeTo(dout);
497:                        break;
498:
499:                    case MEMBER_TAG_ARRAY:
500:                        MemberValue[] values = (MemberValue[]) mValue;
501:                        dout.writeShort(values.length);
502:                        for (int i = 0; i < values.length; i++) {
503:                            values[i].writeTo(dout);
504:                        }
505:                        break;
506:
507:                    case MEMBER_TAG_ANNOTATION:
508:                        ((Annotation) mValue).writeTo(dout);
509:                        break;
510:                    }
511:                }
512:            }
513:
514:            public static class EnumConstValue {
515:                private final ConstantUTFInfo mTypeName;
516:                private final ConstantUTFInfo mConstName;
517:
518:                public EnumConstValue(ConstantUTFInfo typeName,
519:                        ConstantUTFInfo constName) {
520:                    mTypeName = typeName;
521:                    mConstName = constName;
522:                }
523:
524:                public EnumConstValue(ConstantPool cp, DataInput din)
525:                        throws IOException {
526:                    mTypeName = (ConstantUTFInfo) cp.getConstant(din
527:                            .readUnsignedShort());
528:                    mConstName = (ConstantUTFInfo) cp.getConstant(din
529:                            .readUnsignedShort());
530:                }
531:
532:                public ConstantUTFInfo getTypeName() {
533:                    return mTypeName;
534:                }
535:
536:                public ConstantUTFInfo getConstName() {
537:                    return mConstName;
538:                }
539:
540:                public int getLength() {
541:                    return 4;
542:                }
543:
544:                public void writeTo(DataOutput dout) throws IOException {
545:                    dout.writeShort(mTypeName.getIndex());
546:                    dout.writeShort(mConstName.getIndex());
547:                }
548:            }
549:        }
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