Source Code Cross Referenced for Annotations.java in  » Aspect-oriented » aspectwerkz-2.0 » org » codehaus » aspectwerkz » annotation » 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.annotation 
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.annotation;
008:
009:        import org.codehaus.aspectwerkz.reflect.MethodInfo;
010:        import org.codehaus.aspectwerkz.reflect.ClassInfo;
011:        import org.codehaus.aspectwerkz.reflect.ConstructorInfo;
012:        import org.codehaus.aspectwerkz.reflect.FieldInfo;
013:        import org.codehaus.aspectwerkz.reflect.ReflectHelper;
014:        import org.codehaus.aspectwerkz.reflect.impl.asm.AsmClassInfo;
015:        import org.codehaus.aspectwerkz.annotation.instrumentation.asm.AsmAnnotations;
016:
017:        import java.lang.reflect.Constructor;
018:        import java.lang.reflect.Field;
019:        import java.lang.reflect.Method;
020:        import java.util.List;
021:        import java.util.ArrayList;
022:
023:        /**
024:         * Utility class for annotation retrieval.
025:         * <br/>Note: Annotations are extracted out of ASMClassInfo
026:         * <br/>Note: caution when changing that to use reflection, since it might lead to load target class during aspect
027:         * system startup.
028:         *
029:         * @author <a href="mailto:jboner@codehaus.org">Jonas BonŽr </a>
030:         */
031:        public final class Annotations {
032:
033:            private final static List EMPTY_LIST = new ArrayList();
034:
035:            /**
036:             * Return the annotation with a specific name for a specific class.
037:             *
038:             * @param annotationName the annotation name
039:             * @param klass          the java.lang.Class object to find the annotation on.
040:             * @return the annotation or null
041:             */
042:            public static Annotation getAnnotation(final String annotationName,
043:                    final Class klass) {
044:                ClassInfo classInfo = AsmClassInfo.getClassInfo(
045:                        klass.getName(), klass.getClassLoader());
046:                return AsmAnnotations.getAnnotation(annotationName, classInfo);
047:            }
048:
049:            /**
050:             * Return the annotation with a specific name for a specific class.
051:             *
052:             * @param annotation the annotation class
053:             * @param klass      the java.lang.Class object to find the annotation on.
054:             * @return the annotation or null
055:             */
056:            public static Annotation getAnnotation(final Class annotation,
057:                    final Class klass) {
058:                return getAnnotation(getAnnnotationName(annotation), klass);
059:            }
060:
061:            /**
062:             * Return the annotation with a specific name for a specific method.
063:             *
064:             * @param annotationName the annotation name
065:             * @param method         the java.lang.refect.Method object to find the annotation on.
066:             * @return the annotation or null
067:             */
068:            public static Annotation getAnnotation(final String annotationName,
069:                    final Method method) {
070:                ClassLoader loader = method.getDeclaringClass()
071:                        .getClassLoader();
072:                ClassInfo classInfo = AsmClassInfo.getClassInfo(method
073:                        .getDeclaringClass().getName(), loader);
074:                MethodInfo methodInfo = classInfo.getMethod(ReflectHelper
075:                        .calculateHash(method));
076:                return AsmAnnotations.getAnnotation(annotationName, methodInfo);
077:            }
078:
079:            /**
080:             * Return the annotation with a specific name for a specific method.
081:             *
082:             * @param annotation the annotation class
083:             * @param method     the java.lang.refect.Method object to find the annotation on.
084:             * @return the annotation or null
085:             */
086:            public static Annotation getAnnotation(final Class annotation,
087:                    final Method method) {
088:                return getAnnotation(getAnnnotationName(annotation), method);
089:            }
090:
091:            /**
092:             * Return the annotation with a specific name for a specific constructor.
093:             *
094:             * @param annotationName the annotation name
095:             * @param constructor    the java.lang.refect.Constructor object to find the annotation on.
096:             * @return the annotation or null
097:             */
098:            public static Annotation getAnnotation(final String annotationName,
099:                    final Constructor constructor) {
100:                ClassLoader loader = constructor.getDeclaringClass()
101:                        .getClassLoader();
102:                ClassInfo classInfo = AsmClassInfo.getClassInfo(constructor
103:                        .getDeclaringClass().getName(), loader);
104:                ConstructorInfo constructorInfo = classInfo
105:                        .getConstructor(ReflectHelper
106:                                .calculateHash(constructor));
107:                return AsmAnnotations.getAnnotation(annotationName,
108:                        constructorInfo);
109:            }
110:
111:            /**
112:             * Return the annotation with a specific name for a specific constructor.
113:             *
114:             * @param annotation  the annotation class
115:             * @param constructor the java.lang.refect.Constructor object to find the annotation on.
116:             * @return the annotation or null
117:             */
118:            public static Annotation getAnnotation(final Class annotation,
119:                    final Constructor constructor) {
120:                return getAnnotation(getAnnnotationName(annotation),
121:                        constructor);
122:            }
123:
124:            /**
125:             * Return the annotation with a specific name for a specific field.
126:             *
127:             * @param annotationName the annotation name
128:             * @param field          the java.lang.reflect.Field object to find the annotation on.
129:             * @return the annotation or null
130:             */
131:            public static Annotation getAnnotation(final String annotationName,
132:                    final Field field) {
133:                ClassLoader loader = field.getDeclaringClass().getClassLoader();
134:                ClassInfo classInfo = AsmClassInfo.getClassInfo(field
135:                        .getDeclaringClass().getName(), loader);
136:                FieldInfo fieldInfo = classInfo.getField(ReflectHelper
137:                        .calculateHash(field));
138:                return AsmAnnotations.getAnnotation(annotationName, fieldInfo);
139:            }
140:
141:            /**
142:             * Return the annotation with a specific name for a specific field.
143:             *
144:             * @param annotation the annotation class
145:             * @param field      the java.lang.reflect.Field object to find the annotation on.
146:             * @return the annotation or null
147:             */
148:            public static Annotation getAnnotation(final Class annotation,
149:                    final Field field) {
150:                return getAnnotation(getAnnnotationName(annotation), field);
151:            }
152:
153:            /**
154:             * Return a list with the annotations with a specific name for a specific class.
155:             *
156:             * @param annotationName the annotation name
157:             * @param klass          the java.lang.Class object to find the annotation on.
158:             * @return the annotations in a list (can be empty)
159:             */
160:            public static List getAnnotations(final String annotationName,
161:                    final Class klass) {
162:                ClassInfo classInfo = AsmClassInfo.getClassInfo(
163:                        klass.getName(), klass.getClassLoader());
164:                return AsmAnnotations.getAnnotations(annotationName, classInfo);
165:            }
166:
167:            /**
168:             * Return a list with the annotations with a specific name for a specific class.
169:             *
170:             * @param annotation the annotation class
171:             * @param klass      the java.lang.Class object to find the annotation on.
172:             * @return the annotations in a list (can be empty)
173:             */
174:            public static List getAnnotations(final Class annotation,
175:                    final Class klass) {
176:                return getAnnotations(getAnnnotationName(annotation), klass);
177:            }
178:
179:            /**
180:             * Return a list with the annotations with a specific name for a specific method.
181:             *
182:             * @param annotationName the annotation name
183:             * @param method         the java.lang.refect.Method object to find the annotation on.
184:             * @return the annotations in a list (can be empty)
185:             */
186:            public static List getAnnotations(final String annotationName,
187:                    final Method method) {
188:                ClassLoader loader = method.getDeclaringClass()
189:                        .getClassLoader();
190:                ClassInfo classInfo = AsmClassInfo.getClassInfo(method
191:                        .getDeclaringClass().getName(), loader);
192:                MethodInfo methodInfo = classInfo.getMethod(ReflectHelper
193:                        .calculateHash(method));
194:                return AsmAnnotations
195:                        .getAnnotations(annotationName, methodInfo);
196:            }
197:
198:            /**
199:             * Return a list with the annotations with a specific name for a specific method.
200:             *
201:             * @param annotation the annotation class
202:             * @param method     the java.lang.refect.Method object to find the annotation on.
203:             * @return the annotations in a list (can be empty)
204:             */
205:            public static List getAnnotations(final Class annotation,
206:                    final Method method) {
207:                return getAnnotations(getAnnnotationName(annotation), method);
208:            }
209:
210:            /**
211:             * Return a list with the annotations with a specific name for a specific constructor.
212:             *
213:             * @param annotationName the annotation name
214:             * @param constructor    the java.lang.refect.Constructor object to find the annotation on.
215:             * @return the annotations in a list (can be empty)
216:             */
217:            public static List getAnnotations(final String annotationName,
218:                    final Constructor constructor) {
219:                ClassLoader loader = constructor.getDeclaringClass()
220:                        .getClassLoader();
221:                ClassInfo classInfo = AsmClassInfo.getClassInfo(constructor
222:                        .getDeclaringClass().getName(), loader);
223:                ConstructorInfo constructorInfo = classInfo
224:                        .getConstructor(ReflectHelper
225:                                .calculateHash(constructor));
226:                return AsmAnnotations.getAnnotations(annotationName,
227:                        constructorInfo);
228:            }
229:
230:            /**
231:             * Return a list with the annotations with a specific name for a specific constructor.
232:             *
233:             * @param annotation  the annotation class
234:             * @param constructor the java.lang.refect.Constructor object to find the annotation on.
235:             * @return the annotations in a list (can be empty)
236:             */
237:            public static List getAnnotations(final Class annotation,
238:                    final Constructor constructor) {
239:                return getAnnotations(getAnnnotationName(annotation),
240:                        constructor);
241:            }
242:
243:            /**
244:             * Return a list with the annotations with a specific name for a specific field.
245:             *
246:             * @param annotationName the annotation name
247:             * @param field          the java.lang.reflect.Field object to find the annotation on.
248:             * @return the annotations in a list (can be empty)
249:             */
250:            public static List getAnnotations(final String annotationName,
251:                    final Field field) {
252:                ClassLoader loader = field.getDeclaringClass().getClassLoader();
253:                ClassInfo classInfo = AsmClassInfo.getClassInfo(field
254:                        .getDeclaringClass().getName(), loader);
255:                FieldInfo fieldInfo = classInfo.getField(ReflectHelper
256:                        .calculateHash(field));
257:                return AsmAnnotations.getAnnotations(annotationName, fieldInfo);
258:            }
259:
260:            /**
261:             * Return a list with the annotations with a specific name for a specific field.
262:             *
263:             * @param annotation the annotation class
264:             * @param field      the java.lang.reflect.Field object to find the annotation on.
265:             * @return the annotations in a list (can be empty)
266:             */
267:            public static List getAnnotations(final Class annotation,
268:                    final Field field) {
269:                return getAnnotations(getAnnnotationName(annotation), field);
270:            }
271:
272:            /**
273:             * Return a list with the annotations for a specific class. <p/>Each annotation is wrapped in {@link
274:             * org.codehaus.aspectwerkz.annotation.AnnotationInfo}instance.
275:             *
276:             * @param klass the java.lang.Class object to find the annotation on.
277:             * @return a list with the annotations
278:             */
279:            public static List getAnnotationInfos(final Class klass) {
280:                return AsmClassInfo.getClassInfo(klass.getName(),
281:                        klass.getClassLoader()).getAnnotations();
282:            }
283:
284:            /**
285:             * Return the annotations for a specific method. <p/>Each annotation is wrapped in {@link
286:             * org.codehaus.aspectwerkz.annotation.AnnotationInfo}instance.
287:             *
288:             * @param method the java.lang.refect.Method object to find the annotation on.
289:             * @return a list with the annotations
290:             */
291:            public static List getAnnotationInfos(final Method method) {
292:                ClassLoader loader = method.getDeclaringClass()
293:                        .getClassLoader();
294:                ClassInfo classInfo = AsmClassInfo.getClassInfo(method
295:                        .getDeclaringClass().getName(), loader);
296:                // AW methods like aw$initJoinPoints may not be visible
297:                MethodInfo methodInfo = classInfo.getMethod(ReflectHelper
298:                        .calculateHash(method));
299:                if (methodInfo != null) {
300:                    return methodInfo.getAnnotations();
301:                } else {
302:                    return EMPTY_LIST;
303:                }
304:            }
305:
306:            /**
307:             * Return the annotations for a specific constructor. <p/>Each annotation is wrapped in {@link
308:             * org.codehaus.aspectwerkz.annotation.AnnotationInfo}instance.
309:             *
310:             * @param constructor the java.lang.reflect.Constructor object to find the annotation on.
311:             * @return a list with the annotations
312:             */
313:            public static List getAnnotationInfos(final Constructor constructor) {
314:                ClassLoader loader = constructor.getDeclaringClass()
315:                        .getClassLoader();
316:                ClassInfo classInfo = AsmClassInfo.getClassInfo(constructor
317:                        .getDeclaringClass().getName(), loader);
318:                return classInfo.getConstructor(
319:                        ReflectHelper.calculateHash(constructor))
320:                        .getAnnotations();
321:            }
322:
323:            /**
324:             * Return the annotations for a specific field. <p/>Each annotation is wrapped in {@link
325:             * org.codehaus.aspectwerkz.annotation.AnnotationInfo}instance.
326:             *
327:             * @param field the java.lang.reflect.Field object to find the annotation on.
328:             * @return a list with the annotations
329:             */
330:            public static List getAnnotationInfos(final Field field) {
331:                ClassLoader loader = field.getDeclaringClass().getClassLoader();
332:                ClassInfo classInfo = AsmClassInfo.getClassInfo(field
333:                        .getDeclaringClass().getName(), loader);
334:                // AW fields like aw$instanceLevelAspects may not be visible
335:                FieldInfo fieldInfo = classInfo.getField(ReflectHelper
336:                        .calculateHash(field));
337:                if (fieldInfo != null) {
338:                    return fieldInfo.getAnnotations();
339:                } else {
340:                    return EMPTY_LIST;
341:                }
342:            }
343:
344:            //    /**
345:            //     * Returns the annotation proxy class for a specific annotation loaded in a specific loader.
346:            //     *
347:            //     * @param annotationName
348:            //     * @param loader
349:            //     * @return
350:            //     */
351:            //    public static Class getProxyClass(final String annotationName, final ClassLoader loader) {
352:            //        Class proxyClass;
353:            //        AsmClassInfoRepository classInfoRepository = AsmClassInfoRepository.getRepository(loader);
354:            //        String proxyClassName = (String) classInfoRepository.getAnnotationProperties().get(annotationName);
355:            //        if (proxyClassName == null) {
356:            //            return null;
357:            //        }
358:            //        if (proxyClassName.equals("")) {
359:            //            throw new DefinitionException("untyped annotations can not be used with Java5 annotations");
360:            //        } else {
361:            //            try {
362:            //                proxyClass = loader.loadClass(proxyClassName);
363:            //            } catch (ClassNotFoundException e) {
364:            //                String message = proxyClassName
365:            //                                 +
366:            //                                 " could not be found on system classpath or class path provided as argument to the compiler";
367:            //                throw new DefinitionException(message);
368:            //            }
369:            //        }
370:            //        return proxyClass;
371:            //    }
372:
373:            private static String getAnnnotationName(Class annotation) {
374:                return annotation.getName().replace('/', '.');
375:            }
376:        }
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