1 /*
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2002 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 */
54 package net.sf.cglib.proxy;
55
56 import java.lang.reflect.Method;
57 import java.util.*;
58 import net.sf.cglib.core.*;
59 import org.objectweb.asm.ClassVisitor;
60 import org.objectweb.asm.Type;
61
62 /***
63 * @author Chris Nokleberg
64 * @version $Id: MixinEmitter.java,v 1.3 2003/11/06 05:10:52 herbyderby Exp $
65 */
66 class MixinEmitter extends ClassEmitter {
67 private static final String FIELD_NAME = "CGLIB$DELEGATES";
68 private static final Signature CSTRUCT_OBJECT_ARRAY =
69 TypeUtils.parseConstructor("Object[]");
70 private static final Signature NEW_INSTANCE =
71 TypeUtils.parseSignature("net.sf.cglib.proxy.Mixin newInstance(Object[])");
72 private static final Type MIXIN =
73 TypeUtils.parseType("net.sf.cglib.proxy.Mixin");
74
75 public MixinEmitter(ClassVisitor v, String className, Class[] classes, int[] route) {
76 super(v);
77
78 begin_class(Constants.ACC_PUBLIC,
79 className,
80 MIXIN,
81 TypeUtils.getTypes(getInterfaces(classes)),
82 Constants.SOURCE_FILE);
83 EmitUtils.null_constructor(this);
84 EmitUtils.factory_method(this, NEW_INSTANCE);
85
86 declare_field(Constants.ACC_PRIVATE, FIELD_NAME, Constants.TYPE_OBJECT_ARRAY, null, null);
87
88 CodeEmitter e = begin_method(Constants.ACC_PUBLIC, CSTRUCT_OBJECT_ARRAY, null, null);
89 e.load_this();
90 e.super_invoke_constructor();
91 e.load_this();
92 e.load_arg(0);
93 e.putfield(FIELD_NAME);
94 e.return_value();
95 e.end_method();
96
97 Set unique = new HashSet();
98 for (int i = 0; i < classes.length; i++) {
99 Method[] methods = getMethods(classes[i]);
100 for (int j = 0; j < methods.length; j++) {
101 if (unique.add(MethodWrapper.create(methods[j]))) {
102 Method method = methods[j];
103 e = begin_method(Constants.ACC_PUBLIC,
104 ReflectUtils.getSignature(method),
105 ReflectUtils.getExceptionTypes(method),
106 null);
107 e.load_this();
108 e.getfield(FIELD_NAME);
109 e.aaload((route != null) ? route[i] : i);
110 e.checkcast(Type.getType(method.getDeclaringClass()));
111 e.load_args();
112 e.invoke(method);
113 e.return_value();
114 e.end_method();
115 }
116 }
117 }
118
119 end_class();
120 }
121
122 protected Class[] getInterfaces(Class[] classes) {
123 return classes;
124 }
125
126 protected Method[] getMethods(Class type) {
127 return type.getMethods();
128 }
129 }
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