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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.editor;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.visitor.AttributeVisitor;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.*;
import java.util.*;
/**
* This ClassVisitor sorts the attributes of the classes that it visits.
* The sorting order is based on the types of the attributes.
*
* @author Eric Lafortune
*/
public class AttributeSorter
extends SimplifiedVisitor
implements ClassVisitor, MemberVisitor, AttributeVisitor, Comparator
{
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Sort the attributes.
Arrays.sort(programClass.attributes, 0, programClass.u2attributesCount, this);
// Sort the attributes of the class members.
programClass.fieldsAccept(this);
programClass.methodsAccept(this);
}
// Implementations for MemberVisitor.
public void visitProgramMember(ProgramClass programClass, ProgramMember programMember)
{
// Sort the attributes.
Arrays.sort(programMember.attributes, 0, programMember.u2attributesCount, this);
// Sort the attributes of the attributes.
programMember.attributesAccept(programClass, this);
}
// Implementations for AttributeVisitor.
public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
{
// Sort the attributes.
Arrays.sort(codeAttribute.attributes, 0, codeAttribute.u2attributesCount, this);
}
// Implementations for Comparator.
public int compare(Object object1, Object object2)
{
Attribute attribute1 = (Attribute)object1;
Attribute attribute2 = (Attribute)object2;
return attribute1.u2attributeNameIndex < attribute2.u2attributeNameIndex ? -1 :
attribute1.u2attributeNameIndex > attribute2.u2attributeNameIndex ? 1 :
0;
}
}
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