01: /***
02: * Retrotranslator: a Java bytecode transformer that translates Java classes
03: * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
04: *
05: * Copyright (c) 2005 - 2008 Taras Puchko
06: * All rights reserved.
07: *
08: * Redistribution and use in source and binary forms, with or without
09: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holders nor the names of its
17: * contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30: * THE POSSIBILITY OF SUCH DAMAGE.
31: */package net.sf.retrotranslator.runtime.impl;
32:
33: import java.io.Serializable;
34: import java.lang.annotation.*;
35: import java.lang.reflect.*;
36: import java.util.*;
37:
38: /**
39: * @author Taras Puchko
40: */
41: public class AnnotationHandler implements InvocationHandler,
42: Serializable {
43:
44: private Class annotationType;
45: private String asString;
46: private Map<String, Object> values = new HashMap<String, Object>();
47:
48: public AnnotationHandler(Class annotationType, String asString,
49: Map<String, Object> values) {
50: this .annotationType = annotationType;
51: this .asString = asString;
52: this .values = values;
53: }
54:
55: public Object invoke(Object proxy, Method method, Object[] args)
56: throws Throwable {
57: String name = method.getName();
58: if (args != null) {
59: if (name.equals("equals") && args.length == 1
60: && method.getParameterTypes()[0] == Object.class) {
61: return args[0] instanceof Annotation
62: && asString.equals(args[0].toString());
63: }
64: throw new IncompleteAnnotationException(annotationType,
65: name);
66: }
67: if (name.equals("hashCode"))
68: return asString.hashCode();
69: if (name.equals("toString"))
70: return asString;
71: if (name.equals("annotationType"))
72: return annotationType;
73: Object value = values.get(name);
74: if (value != null)
75: return RuntimeTools.cloneNonEmptyArray(value);
76: throw new IncompleteAnnotationException(annotationType, name);
77: }
78:
79: }
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