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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 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.visitor;
import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.instruction.*;
import proguard.classfile.instruction.visitor.InstructionVisitor;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This InstructionVisitor lets a given <code>ClassVisitor</code> visit all
* classes involved in any <code>.class</code> constructs that it visits.
* <p>
* Note that before JDK 1.5, <code>.class</code> constructs are actually
* compiled differently, using <code>Class.forName</code> constructs.
*
* @author Eric Lafortune
*/
public class DotClassClassVisitor
extends SimplifiedVisitor
implements InstructionVisitor,
ConstantVisitor
{
private final ClassVisitor classVisitor;
/**
* Creates a new ClassHierarchyTraveler.
* @param classVisitor the <code>ClassVisitor</code> to which visits will
* be delegated.
*/
public DotClassClassVisitor(ClassVisitor classVisitor)
{
this.classVisitor = classVisitor;
}
// Implementations for InstructionVisitor.
public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) {}
public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction)
{
byte opcode = constantInstruction.opcode;
// Could this instruction be a .class construct?
if (opcode == InstructionConstants.OP_LDC ||
opcode == InstructionConstants.OP_LDC_W)
{
clazz.constantPoolEntryAccept(constantInstruction.constantIndex,
this);
}
}
// Implementations for ConstantVisitor.
public void visitAnyConstant(Clazz clazz, Constant constant) {}
public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
{
// Visit the referenced class from the .class construct.
classConstant.referencedClassAccept(classVisitor);
}
}
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