01: /**
02: * YGuard -- an obfuscation library for Java(TM) classfiles.
03: *
04: * Original Copyright (c) 1999 Mark Welsh (markw@retrologic.com)
05: * Modifications Copyright (c) 2002 yWorks GmbH (yguard@yworks.com)
06: *
07: * This library is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU Lesser General Public
09: * 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: */package com.yworks.yguard.obf.classfile;
26:
27: import java.io.*;
28: import java.util.*;
29:
30: /**
31: * Representation of a 'class' entry in the ConstantPool.
32: *
33: * @author Mark Welsh
34: */
35: public class ClassCpInfo extends CpInfo {
36: // Constants -------------------------------------------------------------
37:
38: // Fields ----------------------------------------------------------------
39: private int u2nameIndex;
40:
41: // Class Methods ---------------------------------------------------------
42:
43: // Instance Methods ------------------------------------------------------
44: protected ClassCpInfo() {
45: super (CONSTANT_Class);
46: }
47:
48: /** Return the name index. */
49: protected int getNameIndex() {
50: return u2nameIndex;
51: }
52:
53: /** Set the name index. */
54: protected void setNameIndex(int index) {
55: u2nameIndex = index;
56: }
57:
58: /** Check for Utf8 references to constant pool and mark them. */
59: protected void markUtf8Refs(ConstantPool pool) {
60: pool.incRefCount(u2nameIndex);
61: }
62:
63: /** Read the 'info' data following the u1tag byte. */
64: protected void readInfo(DataInput din) throws java.io.IOException {
65: u2nameIndex = din.readUnsignedShort();
66: }
67:
68: /** Write the 'info' data following the u1tag byte. */
69: protected void writeInfo(DataOutput dout)
70: throws java.io.IOException {
71: dout.writeShort(u2nameIndex);
72: }
73:
74: /** Dump the content of the class file to the specified file (used for debugging). */
75: public void dump(PrintWriter pw, ClassFile cf) {
76: pw
77: .println(" Class: "
78: + ((Utf8CpInfo) cf.getCpEntry(u2nameIndex))
79: .getString());
80: }
81: }
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