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Java > Open Source Codes > proguard > classfile > attribute > SignatureAttribute


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This library is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This library is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.attribute;
22
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.visitor.AttributeVisitor;
25 import proguard.classfile.visitor.ClassVisitor;
26
27 /**
28  * This Attribute represents a signature attribute.
29  *
30  * @author Eric Lafortune
31  */
32 public class SignatureAttribute extends Attribute
33 {
34     public int u2signatureIndex;
35
36     /**
37      * An extra field pointing to the Clazz objects referenced in the
38      * signature string. This field is filled out by the <code>{@link
39      * proguard.classfile.util.ClassReferenceInitializer ClassReferenceInitializer}</code>.
40      * References to primitive types are ignored.
41      */
42     public Clazz[] referencedClasses;
43
44
45     /**
46      * Creates an uninitialized SignatureAttribute.
47      */
48     public SignatureAttribute()
49     {
50     }
51
52
53     /**
54      * Lets the Clazz objects referenced in the signature string accept the
55      * given visitor.
56      */
57     public void referencedClassesAccept(ClassVisitor classVisitor)
58     {
59         if (referencedClasses != null)
60         {
61             for (int index = 0; index < referencedClasses.length; index++)
62             {
63                 if (referencedClasses[index] != null)
64                 {
65                     referencedClasses[index].accept(classVisitor);
66                 }
67             }
68         }
69     }
70
71
72     // Implementations for Attribute.
73
74     public void accept(Clazz clazz, AttributeVisitor attributeVisitor)
75     {
76         attributeVisitor.visitSignatureAttribute(clazz, this);
77     }
78
79     public void accept(Clazz clazz, Field field, AttributeVisitor attributeVisitor)
80     {
81         attributeVisitor.visitSignatureAttribute(clazz, field, this);
82     }
83
84     public void accept(Clazz clazz, Method method, AttributeVisitor attributeVisitor)
85     {
86         attributeVisitor.visitSignatureAttribute(clazz, method, this);
87     }
88  }
89
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