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 an attribute.
32: *
33: * @author Mark Welsh
34: */
35: public class SourceFileAttrInfo extends AttrInfo {
36: // Constants -------------------------------------------------------------
37:
38: // Fields ----------------------------------------------------------------
39: private int u2sourceFileIndex;
40:
41: // Class Methods ---------------------------------------------------------
42:
43: // Instance Methods ------------------------------------------------------
44: protected SourceFileAttrInfo(ClassFile cf, int attrNameIndex,
45: int attrLength) {
46: super (cf, attrNameIndex, attrLength);
47: }
48:
49: /** Return the String name of the attribute; over-ride this in sub-classes. */
50: protected String getAttrName() {
51: return ATTR_SourceFile;
52: }
53:
54: /** Check for Utf8 references in the 'info' data to the constant pool and mark them. */
55: protected void markUtf8RefsInInfo(ConstantPool pool) {
56: pool.incRefCount(u2sourceFileIndex);
57: }
58:
59: /** Read the data following the header. */
60: protected void readInfo(DataInput din) throws java.io.IOException {
61: u2sourceFileIndex = din.readUnsignedShort();
62: }
63:
64: protected void setSourceFileIndex(int index) {
65: this .u2sourceFileIndex = index;
66: }
67:
68: protected int getSourceFileIndex() {
69: return this .u2sourceFileIndex;
70: }
71:
72: /** Export data following the header to a DataOutput stream. */
73: public void writeInfo(DataOutput dout) throws java.io.IOException {
74: dout.writeShort(u2sourceFileIndex);
75: }
76: }
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