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
26package com.sun.xml.internal.bind.v2.model.annotation;
27
28import java.lang.annotation.Annotation;
29import java.lang.reflect.Field;
30import java.lang.reflect.InvocationTargetException;
31import java.lang.reflect.Method;
32import java.lang.reflect.Type;
33import java.util.HashMap;
34import 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 */
42public 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}
152