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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.editor;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.instruction.visitor.InstructionVisitor;
import proguard.classfile.instruction.*;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This InstructionVisitor adds all instructions that it visits to the given
* target code attribute.
*
* @author Eric Lafortune
*/
public class InstructionAdder
extends SimplifiedVisitor
implements InstructionVisitor
{
private final ConstantAdder constantAdder;
private final CodeAttributeComposer codeAttributeComposer;
/**
* Creates a new InstructionAdder that will copy classes into the given
* target code attribute.
*/
public InstructionAdder(ProgramClass targetClass,
CodeAttributeComposer targetComposer)
{
constantAdder = new ConstantAdder(targetClass);
codeAttributeComposer = targetComposer;
}
// Implementations for InstructionVisitor.
public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction)
{
// Add the instruction.
codeAttributeComposer.appendInstruction(offset, instruction);
}
public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)
{
// Create a copy of the instruction.
Instruction newConstantInstruction =
new ConstantInstruction(constantInstruction.opcode,
constantAdder.addConstant(clazz, constantInstruction.constantIndex),
constantInstruction.constant);
// Add the instruction.
codeAttributeComposer.appendInstruction(offset, newConstantInstruction);
}
}
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