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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.constant.visitor;
import proguard.classfile.Clazz;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.*;
import proguard.classfile.constant.*;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This ConstantVisitor and BootstrapMethodInfoVisitor travels from any invoke
* dynamic constants or bootstrap method info entries that it visits to their
* bootstrap method handle constants, and applies a given constant visitor.
*
* @author Eric Lafortune
*/
public class BootstrapMethodHandleTraveler
extends SimplifiedVisitor
implements ConstantVisitor,
AttributeVisitor,
BootstrapMethodInfoVisitor
{
private ConstantVisitor bootstrapMethodHandleVisitor;
// Field serving as a method argument.
int bootstrapMethodAttributeIndex;
/**
* Creates a new BootstrapMethodHandleVisitor that will delegate to the
* given constant visitor.
*/
public BootstrapMethodHandleTraveler(ConstantVisitor bootstrapMethodHandleVisitor)
{
this.bootstrapMethodHandleVisitor = bootstrapMethodHandleVisitor;
}
// Implementations for ConstantVisitor.
public void visitAnyConstant(Clazz clazz, Constant constant) {}
public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
{
// Pass the method index.
bootstrapMethodAttributeIndex =
invokeDynamicConstant.u2bootstrapMethodAttributeIndex;
// Delegate to the bootstrap method.
clazz.attributesAccept(this);
}
// Implementations for AttributeVisitor.
public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
public void visitBootstrapMethodsAttribute(Clazz clazz, BootstrapMethodsAttribute bootstrapMethodsAttribute)
{
// Check bootstrap methods.
bootstrapMethodsAttribute.bootstrapMethodEntryAccept(clazz,
bootstrapMethodAttributeIndex,
this);
}
// Implementations for BootstrapMethodInfoVisitor.
public void visitBootstrapMethodInfo(Clazz clazz, BootstrapMethodInfo bootstrapMethodInfo)
{
// Check bootstrap method.
clazz.constantPoolEntryAccept(bootstrapMethodInfo.u2methodHandleIndex,
bootstrapMethodHandleVisitor);
}
}
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