Source Code Cross Referenced for JavaClassInfo.java in  » Aspect-oriented » aspectwerkz-2.0 » org » codehaus » aspectwerkz » reflect » impl » java » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Aspect oriented » aspectwerkz 2.0 » org.codehaus.aspectwerkz.reflect.impl.java 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**************************************************************************************
002:         * Copyright (c) Jonas BonŽr, Alexandre Vasseur. All rights reserved.                 *
003:         * http://aspectwerkz.codehaus.org                                                    *
004:         * ---------------------------------------------------------------------------------- *
005:         * The software in this package is published under the terms of the LGPL license      *
006:         * a copy of which has been included with this distribution in the license.txt file.  *
007:         **************************************************************************************/package org.codehaus.aspectwerkz.reflect.impl.java;
008:
009:        import gnu.trove.TIntObjectHashMap;
010:        import org.codehaus.aspectwerkz.annotation.Annotations;
011:        import org.codehaus.aspectwerkz.reflect.ClassInfo;
012:        import org.codehaus.aspectwerkz.reflect.ConstructorInfo;
013:        import org.codehaus.aspectwerkz.reflect.FieldInfo;
014:        import org.codehaus.aspectwerkz.reflect.MethodInfo;
015:        import org.codehaus.aspectwerkz.reflect.ReflectHelper;
016:        import org.codehaus.aspectwerkz.reflect.ReflectHelper;
017:        import org.codehaus.aspectwerkz.reflect.StaticInitializationInfo;
018:        import org.codehaus.aspectwerkz.reflect.StaticInitializationInfoImpl;
019:        import org.codehaus.aspectwerkz.reflect.impl.asm.AsmClassInfo;
020:        import org.codehaus.aspectwerkz.transform.TransformationConstants;
021:
022:        import java.lang.reflect.Constructor;
023:        import java.lang.reflect.Field;
024:        import java.lang.reflect.Method;
025:        import java.util.List;
026:
027:        /**
028:         * Implementation of the ClassInfo interface for java.lang.reflect.*.
029:         *
030:         * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
031:         */
032:        public class JavaClassInfo implements  ClassInfo {
033:            /**
034:             * The class.
035:             */
036:            // TODO might be safer to wrap this member in a weak ref
037:            private final Class m_class;
038:
039:            /**
040:             * The name of the class.
041:             */
042:            private String m_name;
043:
044:            /**
045:             * The signature of the class.
046:             */
047:            private String m_signature;
048:
049:            /**
050:             * Is the class an interface.
051:             */
052:            private boolean m_isInterface = false;
053:
054:            /**
055:             * Is the class a primitive type.
056:             */
057:            private boolean m_isPrimitive = false;
058:
059:            /**
060:             * Is the class of type array.
061:             */
062:            private boolean m_isArray = false;
063:
064:            /**
065:             * A list with the <code>ConstructorInfo</code> instances.
066:             */
067:            private final TIntObjectHashMap m_constructors = new TIntObjectHashMap();
068:
069:            /**
070:             * A list with the <code>MethodInfo</code> instances.
071:             */
072:            private final TIntObjectHashMap m_methods = new TIntObjectHashMap();
073:
074:            /**
075:             * A list with the <code>FieldInfo</code> instances.
076:             */
077:            private final TIntObjectHashMap m_fields = new TIntObjectHashMap();
078:
079:            /**
080:             * A list with the interfaces.
081:             */
082:            private ClassInfo[] m_interfaces = null;
083:
084:            /**
085:             * The super class.
086:             */
087:            private ClassInfo m_super Class = null;
088:
089:            /**
090:             * The annotations.
091:             */
092:            private List m_annotations = null;
093:
094:            /**
095:             * The component type if array type.
096:             */
097:            private ClassInfo m_componentType = null;
098:
099:            /**
100:             * The class info repository.
101:             */
102:            private final JavaClassInfoRepository m_classInfoRepository;
103:
104:            /**
105:             * Lazy, the static initializer info or null if not present
106:             */
107:            private StaticInitializationInfo m_staticInitializer = null;
108:
109:            /**
110:             * Creates a new class meta data instance.
111:             *
112:             * @param klass
113:             */
114:            JavaClassInfo(final Class klass) {
115:                if (klass == null) {
116:                    throw new IllegalArgumentException("class can not be null");
117:                }
118:                m_class = klass;
119:
120:                m_signature = ReflectHelper.getClassSignature(klass);
121:
122:                m_classInfoRepository = JavaClassInfoRepository
123:                        .getRepository(klass.getClassLoader());
124:                m_isInterface = klass.isInterface();
125:                if (klass.isPrimitive()) {
126:                    m_name = klass.getName();
127:                    m_isPrimitive = true;
128:                } else if (klass.getComponentType() != null) {
129:                    m_name = convertJavaArrayTypeNameToHumanTypeName(klass
130:                            .getName());
131:                    m_isArray = true;
132:                    m_interfaces = new ClassInfo[0];
133:                } else {
134:                    m_name = klass.getName();
135:                    Method[] methods = m_class.getDeclaredMethods();
136:                    for (int i = 0; i < methods.length; i++) {
137:                        Method method = methods[i];
138:                        m_methods.put(ReflectHelper.calculateHash(method),
139:                                new JavaMethodInfo(method, this ));
140:                    }
141:                    Constructor[] constructors = m_class
142:                            .getDeclaredConstructors();
143:                    for (int i = 0; i < constructors.length; i++) {
144:                        Constructor constructor = constructors[i];
145:                        m_constructors.put(ReflectHelper
146:                                .calculateHash(constructor),
147:                                new JavaConstructorInfo(constructor, this ));
148:                    }
149:                    Field[] fields = m_class.getDeclaredFields();
150:                    for (int i = 0; i < fields.length; i++) {
151:                        if (fields[i].getName().startsWith(
152:                                TransformationConstants.ASPECTWERKZ_PREFIX)) {
153:                            continue;
154:                        }
155:                        Field field = fields[i];
156:                        m_fields.put(ReflectHelper.calculateHash(field),
157:                                new JavaFieldInfo(field, this ));
158:                    }
159:                }
160:                m_classInfoRepository.addClassInfo(this );
161:            }
162:
163:            /**
164:             * Returns the class info for a specific class.
165:             *
166:             * @return the class info
167:             */
168:            public static ClassInfo getClassInfo(final Class clazz) {
169:                JavaClassInfoRepository repository = JavaClassInfoRepository
170:                        .getRepository(clazz.getClassLoader());
171:                ClassInfo classInfo = repository.getClassInfo(clazz.getName());
172:                if (classInfo == null) {
173:                    classInfo = new JavaClassInfo(clazz);
174:                }
175:                return classInfo;
176:            }
177:
178:            /**
179:             * Returns the annotations infos.
180:             *
181:             * @return the annotations infos
182:             */
183:            public List getAnnotations() {
184:                if (m_annotations == null) {
185:                    // TODO this means that JavaClassInfo is always using AsmClassInfo to get that annotations
186:                    // TODO should optimize for Java5
187:                    m_annotations = Annotations.getAnnotationInfos(m_class);
188:                }
189:                return m_annotations;
190:            }
191:
192:            /**
193:             * Returns the name of the class.
194:             *
195:             * @return the name of the class
196:             */
197:            public String getName() {
198:                return m_name.replace('/', '.');
199:            }
200:
201:            /**
202:             * Checks if the class has a static initalizer.
203:             *
204:             * @return
205:             */
206:            public boolean hasStaticInitializer() {
207:                ClassInfo classInfo = AsmClassInfo.getClassInfo(getName(),
208:                        getClassLoader());
209:                return classInfo.hasStaticInitializer();
210:            }
211:
212:            /**
213:             * Returns the static initializer info of the current underlying class if any.
214:             * 
215:             * @see org.codehaus.aspectwerkz.reflect.ClassInfo#staticInitializer()
216:             */
217:            public StaticInitializationInfo staticInitializer() {
218:                if (hasStaticInitializer() && m_staticInitializer == null) {
219:                    m_staticInitializer = new StaticInitializationInfoImpl(this );
220:                }
221:                return m_staticInitializer;
222:            }
223:
224:            /**
225:             * Returns the signature for the element.
226:             *
227:             * @return the signature for the element
228:             */
229:            public String getSignature() {
230:                return m_signature;
231:            }
232:
233:            /**
234:             * Returns the class modifiers.
235:             *
236:             * @return the class modifiers
237:             */
238:            public int getModifiers() {
239:                return m_class.getModifiers();
240:            }
241:
242:            /**
243:             * Returns the class loader that loaded this class.
244:             *
245:             * @return the class loader
246:             */
247:            public ClassLoader getClassLoader() {
248:                return m_class.getClassLoader();
249:            }
250:
251:            /**
252:             * Returns a constructor info by its hash.
253:             *
254:             * @param hash
255:             * @return
256:             */
257:            public ConstructorInfo getConstructor(final int hash) {
258:                ConstructorInfo constructor = (ConstructorInfo) m_constructors
259:                        .get(hash);
260:                if (constructor == null && getSuperclass() != null) {
261:                    constructor = getSuperclass().getConstructor(hash);
262:                }
263:                return constructor;
264:            }
265:
266:            /**
267:             * Returns a list with all the constructors info.
268:             *
269:             * @return the constructors info
270:             */
271:            public ConstructorInfo[] getConstructors() {
272:                Object[] values = m_constructors.getValues();
273:                ConstructorInfo[] methodInfos = new ConstructorInfo[values.length];
274:                for (int i = 0; i < values.length; i++) {
275:                    methodInfos[i] = (ConstructorInfo) values[i];
276:                }
277:                return methodInfos;
278:            }
279:
280:            /**
281:             * Returns a method info by its hash.
282:             *
283:             * @param hash
284:             * @return
285:             */
286:            public MethodInfo getMethod(final int hash) {
287:                MethodInfo method = (MethodInfo) m_methods.get(hash);
288:                if (method == null) {
289:                    for (int i = 0; i < getInterfaces().length; i++) {
290:                        method = getInterfaces()[i].getMethod(hash);
291:                        if (method != null) {
292:                            break;
293:                        }
294:                    }
295:                }
296:                if (method == null && getSuperclass() != null) {
297:                    method = getSuperclass().getMethod(hash);
298:                }
299:                return method;
300:            }
301:
302:            /**
303:             * Returns a list with all the methods info.
304:             *
305:             * @return the methods info
306:             */
307:            public MethodInfo[] getMethods() {
308:                Object[] values = m_methods.getValues();
309:                MethodInfo[] methodInfos = new MethodInfo[values.length];
310:                for (int i = 0; i < values.length; i++) {
311:                    methodInfos[i] = (MethodInfo) values[i];
312:                }
313:                return methodInfos;
314:            }
315:
316:            /**
317:             * Returns a field info by its hash.
318:             *
319:             * @param hash
320:             * @return
321:             */
322:            public FieldInfo getField(final int hash) {
323:                FieldInfo field = (FieldInfo) m_fields.get(hash);
324:                if (field == null && getSuperclass() != null) {
325:                    field = getSuperclass().getField(hash);
326:                }
327:                return field;
328:            }
329:
330:            /**
331:             * Returns a list with all the field info.
332:             *
333:             * @return the field info
334:             */
335:            public FieldInfo[] getFields() {
336:                Object[] values = m_fields.getValues();
337:                FieldInfo[] fieldInfos = new FieldInfo[values.length];
338:                for (int i = 0; i < values.length; i++) {
339:                    fieldInfos[i] = (FieldInfo) values[i];
340:                }
341:                return fieldInfos;
342:            }
343:
344:            /**
345:             * Returns the interfaces.
346:             *
347:             * @return the interfaces
348:             */
349:            public ClassInfo[] getInterfaces() {
350:                if (m_interfaces == null) {
351:                    Class[] interfaces = m_class.getInterfaces();
352:                    m_interfaces = new ClassInfo[interfaces.length];
353:                    for (int i = 0; i < interfaces.length; i++) {
354:                        Class anInterface = interfaces[i];
355:                        ClassInfo classInfo = JavaClassInfo
356:                                .getClassInfo(anInterface);
357:                        m_interfaces[i] = classInfo;
358:                        if (!m_classInfoRepository.hasClassInfo(anInterface
359:                                .getName())) {
360:                            m_classInfoRepository.addClassInfo(classInfo);
361:                        }
362:                    }
363:                }
364:                return m_interfaces;
365:            }
366:
367:            /**
368:             * Returns the super class.
369:             *
370:             * @return the super class
371:             */
372:            public ClassInfo getSuperclass() {
373:                if (m_super Class == null) {
374:                    Class super class = m_class.getSuperclass();
375:                    if (super class != null) {
376:                        if (m_classInfoRepository.hasClassInfo(super class
377:                                .getName())) {
378:                            m_super Class = m_classInfoRepository
379:                                    .getClassInfo(super class.getName());
380:                        } else {
381:                            m_super Class = JavaClassInfo
382:                                    .getClassInfo(super class);
383:                            m_classInfoRepository.addClassInfo(m_super Class);
384:                        }
385:                    }
386:                }
387:                return m_super Class;
388:            }
389:
390:            /**
391:             * Returns the component type if array type else null.
392:             *
393:             * @return the component type
394:             */
395:            public ClassInfo getComponentType() {
396:                if (isArray() && (m_componentType == null)) {
397:                    Class componentType = m_class.getComponentType();
398:                    if (m_classInfoRepository.hasClassInfo(componentType
399:                            .getName())) {
400:                        m_componentType = m_classInfoRepository
401:                                .getClassInfo(componentType.getName());
402:                    } else {
403:                        m_componentType = JavaClassInfo
404:                                .getClassInfo(componentType);
405:                        m_classInfoRepository.addClassInfo(m_componentType);
406:                    }
407:                }
408:                return m_componentType;
409:            }
410:
411:            /**
412:             * Is the class an interface.
413:             *
414:             * @return
415:             */
416:            public boolean isInterface() {
417:                return m_isInterface;
418:            }
419:
420:            /**
421:             * Is the class a primitive type.
422:             *
423:             * @return
424:             */
425:            public boolean isPrimitive() {
426:                return m_isPrimitive;
427:            }
428:
429:            /**
430:             * Is the class an array type.
431:             *
432:             * @return
433:             */
434:            public boolean isArray() {
435:                return m_isArray;
436:            }
437:
438:            /**
439:             * Converts an internal Java array type name ([Lblabla) to the a the format used by the expression matcher
440:             * (blabla[])
441:             *
442:             * @param typeName is type name
443:             * @return
444:             */
445:            public static String convertJavaArrayTypeNameToHumanTypeName(
446:                    final String typeName) {
447:                int index = typeName.lastIndexOf('[');
448:                if (index != -1) {
449:                    StringBuffer arrayType = new StringBuffer();
450:                    if (typeName.endsWith("I")) {
451:                        arrayType.append("int");
452:                    } else if (typeName.endsWith("J")) {
453:                        arrayType.append("long");
454:                    } else if (typeName.endsWith("S")) {
455:                        arrayType.append("short");
456:                    } else if (typeName.endsWith("F")) {
457:                        arrayType.append("float");
458:                    } else if (typeName.endsWith("D")) {
459:                        arrayType.append("double");
460:                    } else if (typeName.endsWith("Z")) {
461:                        arrayType.append("boolean");
462:                    } else if (typeName.endsWith("C")) {
463:                        arrayType.append("char");
464:                    } else if (typeName.endsWith("B")) {
465:                        arrayType.append("byte");
466:                    } else {
467:                        arrayType.append(typeName.substring(index + 2, typeName
468:                                .length() - 1));
469:                    }
470:                    for (int i = 0; i < (index + 1); i++) {
471:                        arrayType.append("[]");
472:                    }
473:                    return arrayType.toString();
474:                } else {
475:                    return typeName;
476:                }
477:            }
478:
479:            public boolean equals(Object o) {
480:                if (this  == o) {
481:                    return true;
482:                }
483:                if (!(o instanceof  ClassInfo)) {
484:                    return false;
485:                }
486:                ClassInfo classInfo = (ClassInfo) o;
487:                return m_class.getName().toString().equals(
488:                        classInfo.getName().toString());
489:            }
490:
491:            public int hashCode() {
492:                return m_class.getName().toString().hashCode();
493:            }
494:
495:            public String toString() {
496:                return getName();
497:            }
498:        }
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