1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  *             of Java bytecode.
4  *
5  * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program 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 program 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 General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.editor;
22 
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.*;
25 import proguard.classfile.attribute.visitor.LineNumberInfoVisitor;
26 
27 /**
28  * This LineNumberInfoVisitor adds all line numbers that it visits to the given
29  * target line number attribute.
30  */
31 public class LineNumberInfoAdder
32 implements   LineNumberInfoVisitor
33 {
34     private final LineNumberTableAttributeEditor lineNumberTableAttributeEditor;
35 
36 
37     /**
38      * Creates a new LineNumberInfoAdder that will copy line numbers into the
39      * given target line number table.
40      */
LineNumberInfoAdder(LineNumberTableAttribute targetLineNumberTableAttribute)41     public LineNumberInfoAdder(LineNumberTableAttribute targetLineNumberTableAttribute)
42     {
43         this.lineNumberTableAttributeEditor = new LineNumberTableAttributeEditor(targetLineNumberTableAttribute);
44     }
45 
46 
47     // Implementations for LineNumberInfoVisitor.
48 
visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)49     public void visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)
50     {
51         // Create a new line number.
52         LineNumberInfo newLineNumberInfo =
53             new LineNumberInfo(lineNumberInfo.u2startPC,
54                                lineNumberInfo.u2lineNumber);
55 
56         // Add it to the target.
57         lineNumberTableAttributeEditor.addLineNumberInfo(newLineNumberInfo);
58     }
59 }
60