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Java > Open Source Codes > com > tc > asm > optimizer > NameMapping


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 com.tc.asm.optimizer;
31
32 import java.io.FileInputStream JavaDoc;
33 import java.io.IOException JavaDoc;
34 import java.util.HashSet JavaDoc;
35 import java.util.Properties JavaDoc;
36 import java.util.Set JavaDoc;
37
38 import com.tc.asm.Type;
39
40 /**
41  * A mapping from names to names, used to rename classes, fields and methods.
42  *
43  * @author Eric Bruneton
44  */
45 public class NameMapping extends Properties JavaDoc {
46
47     public final Set JavaDoc unused;
48     
49     public NameMapping(final String JavaDoc file) throws IOException JavaDoc {
50         load(new FileInputStream JavaDoc(file));
51         unused = new HashSet JavaDoc(keySet());
52     }
53
54     public String JavaDoc map(final String JavaDoc name) {
55         String JavaDoc s = (String JavaDoc) get(name);
56         if (s == null) {
57             int p = name.indexOf('.');
58             if (p != -1) {
59                 int q = name.indexOf('(');
60                 if (q != -1) {
61                     s = name.substring(p + 1, q);
62                 } else {
63                     s = name.substring(p + 1);
64                 }
65             } else {
66                 s = name;
67             }
68         } else {
69             unused.remove(name);
70         }
71         return s;
72     }
73
74     public String JavaDoc fix(final String JavaDoc desc) {
75         if (desc.startsWith("(")) {
76             Type[] arguments = Type.getArgumentTypes(desc);
77             Type result = Type.getReturnType(desc);
78             for (int i = 0; i < arguments.length; ++i) {
79                 arguments[i] = fix(arguments[i]);
80             }
81             result = fix(result);
82             return Type.getMethodDescriptor(result, arguments);
83         } else {
84             return fix(Type.getType(desc)).getDescriptor();
85         }
86     }
87
88     private Type fix(final Type t) {
89         if (t.getSort() == Type.OBJECT) {
90             return Type.getType("L" + map(t.getInternalName()) + ";");
91         } else if (t.getSort() == Type.ARRAY) {
92             String JavaDoc s = fix(t.getElementType()).getDescriptor();
93             for (int i = 0; i < t.getDimensions(); ++i) {
94                 s = "[" + s;
95             }
96             return Type.getType(s);
97         } else {
98             return t;
99         }
100     }
101 }
102
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