1 /***
2  * ASM: a very small and fast Java bytecode manipulation framework
3  * Copyright (c) 2000-2005 INRIA, France Telecom
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. Neither the name of the copyright holders nor the names of its
15  *    contributors may be used to endorse or promote products derived from
16  *    this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28  * THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 package org.objectweb.asm.optimizer;
31 
32 import org.objectweb.asm.AnnotationVisitor;
33 import org.objectweb.asm.Label;
34 import org.objectweb.asm.MethodAdapter;
35 import org.objectweb.asm.MethodVisitor;
36 
37 /**
38  * A {@link MethodAdapter} that renames fields and methods, and removes debug
39  * info.
40  *
41  * @author Eric Bruneton
42  */
43 public class MethodOptimizer extends MethodAdapter {
44 
45     private NameMapping mapping;
46 
47     public MethodOptimizer(final MethodVisitor mv, final NameMapping mapping) {
48         super(mv);
49         this.mapping = mapping;
50     }
51 
52     // ------------------------------------------------------------------------
53     // Overriden methods
54     // ------------------------------------------------------------------------
55 
56     public AnnotationVisitor visitAnnotationDefault() {
57         throw new UnsupportedOperationException();
58     }
59 
60     public AnnotationVisitor visitParameterAnnotation(
61         final int parameter,
62         final String desc,
63         final boolean visible)
64     {
65         throw new UnsupportedOperationException();
66     }
67 
68     public void visitTypeInsn(final int opcode, final String desc) {
69         mv.visitTypeInsn(opcode, desc.startsWith("[")
70                 ? mapping.fix(desc)
71                 : mapping.map(desc));
72     }
73 
74     public void visitFieldInsn(
75         final int opcode,
76         final String owner,
77         final String name,
78         final String desc)
79     {
80         mv.visitFieldInsn(opcode, mapping.map(owner), mapping.map(owner + "."
81                 + name), mapping.fix(desc));
82     }
83 
84     public void visitMethodInsn(
85         final int opcode,
86         final String owner,
87         final String name,
88         final String desc)
89     {
90         mv.visitMethodInsn(opcode, mapping.map(owner), mapping.map(owner + "."
91                 + name + desc), mapping.fix(desc));
92     }
93 
94     public void visitLocalVariable(
95         final String name,
96         final String desc,
97         final String signature,
98         final Label start,
99         final Label end,
100         final int index)
101     {
102         // remove debug info
103     }
104 
105     public void visitLineNumber(final int line, final Label start) {
106         // remove debug info
107     }
108 }
109