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Java > Open Source Codes > com > yworks > yguard > obf > classfile > InnerClassesAttrInfo


1 /**
2  * YGuard -- an obfuscation library for Java(TM) classfiles.
3  *
4  * Original Copyright (c) 1999 Mark Welsh (markw@retrologic.com)
5  * Modifications Copyright (c) 2002 yWorks GmbH (yguard@yworks.com)
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  * The author may be contacted at yguard@yworks.com
22  *
23  * Java and all Java-based marks are trademarks or registered
24  * trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
25  */
26 package com.yworks.yguard.obf.classfile;
27
28 import java.io.*;
29 import java.util.*;
30
31 /**
32  * Representation of an attribute.
33  *
34  * @author Mark Welsh
35  */
36 public class InnerClassesAttrInfo extends AttrInfo
37 {
38     // Constants -------------------------------------------------------------
39
40
41     // Fields ----------------------------------------------------------------
42 private int u2numberOfClasses;
43     private InnerClassesInfo[] classes;
44
45
46     // Class Methods ---------------------------------------------------------
47
48
49     // Instance Methods ------------------------------------------------------
50 protected InnerClassesAttrInfo(ClassFile cf, int attrNameIndex, int attrLength)
51     {
52         super(cf, attrNameIndex, attrLength);
53     }
54
55     /** Return the String name of the attribute; over-ride this in sub-classes. */
56     protected String JavaDoc getAttrName()
57     {
58         return ATTR_InnerClasses;
59     }
60
61     /** Return the array of inner classes data. */
62     protected InnerClassesInfo[] getInfo()
63     {
64         return classes;
65     }
66
67     /** Check for Utf8 references in the 'info' data to the constant pool and mark them. */
68     protected void markUtf8RefsInInfo(ConstantPool pool)
69     {
70         for (int i = 0; i < classes.length; i++)
71         {
72             classes[i].markUtf8Refs(pool);
73         }
74     }
75
76     /** Read the data following the header. */
77     protected void readInfo(DataInput din) throws java.io.IOException JavaDoc
78     {
79         u2numberOfClasses = din.readUnsignedShort();
80         classes = new InnerClassesInfo[u2numberOfClasses];
81         for (int i = 0; i < u2numberOfClasses; i++)
82         {
83             classes[i] = InnerClassesInfo.create(din);
84         }
85     }
86
87     /** Export data following the header to a DataOutput stream. */
88     public void writeInfo(DataOutput dout) throws java.io.IOException JavaDoc
89     {
90         dout.writeShort(u2numberOfClasses);
91         for (int i = 0; i < u2numberOfClasses; i++)
92         {
93             classes[i].write(dout);
94         }
95     }
96 }
97
98
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