1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.model.annotation;
  27 
  28 import java.lang.annotation.Annotation;
  29 import java.lang.reflect.Field;
  30 import java.lang.reflect.InvocationTargetException;
  31 import java.lang.reflect.Method;
  32 import java.lang.reflect.Type;
  33 import java.util.HashMap;
  34 import java.util.Map;
  35 
  36 /**
  37  * {@link AnnotationReader} that uses {@code java.lang.reflect} to
  38  * read annotations from class files.
  39  *
  40  * @author Kohsuke Kawaguchi (kk@kohsuke.org)
  41  */
  42 public final class RuntimeInlineAnnotationReader extends AbstractInlineAnnotationReaderImpl<Type,Class,Field,Method>
  43     implements RuntimeAnnotationReader {
  44 
  45     public <A extends Annotation> A getFieldAnnotation(Class<A> annotation, Field field, Locatable srcPos) {
  46         return LocatableAnnotation.create(field.getAnnotation(annotation),srcPos);
  47     }
  48 
  49     public boolean hasFieldAnnotation(Class<? extends Annotation> annotationType, Field field) {
  50         return field.isAnnotationPresent(annotationType);
  51     }
  52 
  53     public boolean hasClassAnnotation(Class clazz, Class<? extends Annotation> annotationType) {
  54         return clazz.isAnnotationPresent(annotationType);
  55     }
  56 
  57     public Annotation[] getAllFieldAnnotations(Field field, Locatable srcPos) {
  58         Annotation[] r = field.getAnnotations();
  59         for( int i=0; i<r.length; i++ ) {
  60             r[i] = LocatableAnnotation.create(r[i],srcPos);
  61         }
  62         return r;
  63     }
  64 
  65     public <A extends Annotation> A getMethodAnnotation(Class<A> annotation, Method method, Locatable srcPos) {
  66         return LocatableAnnotation.create(method.getAnnotation(annotation),srcPos);
  67     }
  68 
  69     public boolean hasMethodAnnotation(Class<? extends Annotation> annotation, Method method) {
  70         return method.isAnnotationPresent(annotation);
  71     }
  72 
  73     public Annotation[] getAllMethodAnnotations(Method method, Locatable srcPos) {
  74         Annotation[] r = method.getAnnotations();
  75         for( int i=0; i<r.length; i++ ) {
  76             r[i] = LocatableAnnotation.create(r[i],srcPos);
  77         }
  78         return r;
  79     }
  80 
  81     public <A extends Annotation> A getMethodParameterAnnotation(Class<A> annotation, Method method, int paramIndex, Locatable srcPos) {
  82         Annotation[] pa = method.getParameterAnnotations()[paramIndex];
  83         for( Annotation a : pa ) {
  84             if(a.annotationType()==annotation)
  85                 return LocatableAnnotation.create((A)a,srcPos);
  86         }
  87         return null;
  88     }
  89 
  90     public <A extends Annotation> A getClassAnnotation(Class<A> a, Class clazz, Locatable srcPos) {
  91         return LocatableAnnotation.create(((Class<?>)clazz).getAnnotation(a),srcPos);
  92     }
  93 
  94 
  95     /**
  96      * Cache for package-level annotations.
  97      */
  98     private final Map<Class<? extends Annotation>,Map<Package,Annotation>> packageCache =
  99             new HashMap<Class<? extends Annotation>,Map<Package,Annotation>>();
 100 
 101     public <A extends Annotation> A getPackageAnnotation(Class<A> a, Class clazz, Locatable srcPos) {
 102         Package p = clazz.getPackage();
 103         if(p==null) return null;
 104 
 105         Map<Package,Annotation> cache = packageCache.get(a);
 106         if(cache==null) {
 107             cache = new HashMap<Package,Annotation>();
 108             packageCache.put(a,cache);
 109         }
 110 
 111         if(cache.containsKey(p))
 112             return (A)cache.get(p);
 113         else {
 114             A ann = LocatableAnnotation.create(p.getAnnotation(a),srcPos);
 115             cache.put(p,ann);
 116             return ann;
 117         }
 118     }
 119 
 120     public Class getClassValue(Annotation a, String name) {
 121         try {
 122             return (Class)a.annotationType().getMethod(name).invoke(a);
 123         } catch (IllegalAccessException e) {
 124             // impossible
 125             throw new IllegalAccessError(e.getMessage());
 126         } catch (InvocationTargetException e) {
 127             // impossible
 128             throw new InternalError(Messages.CLASS_NOT_FOUND.format(a.annotationType(), e.getMessage()));
 129         } catch (NoSuchMethodException e) {
 130             throw new NoSuchMethodError(e.getMessage());
 131         }
 132     }
 133 
 134     public Class[] getClassArrayValue(Annotation a, String name) {
 135         try {
 136             return (Class[])a.annotationType().getMethod(name).invoke(a);
 137         } catch (IllegalAccessException e) {
 138             // impossible
 139             throw new IllegalAccessError(e.getMessage());
 140         } catch (InvocationTargetException e) {
 141             // impossible
 142             throw new InternalError(e.getMessage());
 143         } catch (NoSuchMethodException e) {
 144             throw new NoSuchMethodError(e.getMessage());
 145         }
 146     }
 147 
 148     protected String fullName(Method m) {
 149         return m.getDeclaringClass().getName()+'#'+m.getName();
 150     }
 151 }