1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2013 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.attribute.visitor.LocalVariableInfoVisitor; 24 import proguard.classfile.attribute.*; 25 import proguard.classfile.*; 26 27 /** 28 * This LocalVariableInfoVisitor adds all line numbers that it visits to the given 29 * target line number attribute. 30 */ 31 public class LocalVariableInfoAdder 32 implements LocalVariableInfoVisitor 33 { 34 private final ConstantAdder constantAdder; 35 private final LocalVariableTableAttributeEditor localVariableTableAttributeEditor; 36 37 38 /** 39 * Creates a new LocalVariableInfoAdder that will copy line numbers into the 40 * given target line number table. 41 */ LocalVariableInfoAdder(ProgramClass targetClass, LocalVariableTableAttribute targetLocalVariableTableAttribute)42 public LocalVariableInfoAdder(ProgramClass targetClass, 43 LocalVariableTableAttribute targetLocalVariableTableAttribute) 44 { 45 this.constantAdder = new ConstantAdder(targetClass); 46 this.localVariableTableAttributeEditor = new LocalVariableTableAttributeEditor(targetLocalVariableTableAttribute); 47 } 48 49 50 // Implementations for LocalVariableInfoVisitor. 51 visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)52 public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo) 53 { 54 // Create a new line number. 55 LocalVariableInfo newLocalVariableInfo = 56 new LocalVariableInfo(localVariableInfo.u2startPC, 57 localVariableInfo.u2length, 58 constantAdder.addConstant(clazz, localVariableInfo.u2nameIndex), 59 constantAdder.addConstant(clazz, localVariableInfo.u2descriptorIndex), 60 localVariableInfo.u2index); 61 62 newLocalVariableInfo.referencedClass = localVariableInfo.referencedClass; 63 64 // Add it to the target. 65 localVariableTableAttributeEditor.addLocalVariableInfo(newLocalVariableInfo); 66 } 67 }