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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.optimize.peephole;
import proguard.classfile.*;
import proguard.classfile.util.*;
import proguard.classfile.visitor.*;
import proguard.optimize.KeepMarker;
/**
* This <code>ClassVisitor</code> makes the program classes that it visits
* final, if possible.
*
* @author Eric Lafortune
*/
public class ClassFinalizer
extends SimplifiedVisitor
implements ClassVisitor
{
private final ClassVisitor extraClassVisitor;
/**
* Creates a new ClassFinalizer.
*/
public ClassFinalizer()
{
this(null);
}
/**
* Creates a new ClassFinalizer.
* @param extraClassVisitor an optional extra visitor for all finalized
* classes.
*/
public ClassFinalizer(ClassVisitor extraClassVisitor)
{
this.extraClassVisitor = extraClassVisitor;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// If the class is not final/interface/abstract,
// and it is not being kept,
// and it doesn't have any subclasses,
// then make it final.
if ((programClass.u2accessFlags & (ClassConstants.INTERNAL_ACC_FINAL |
ClassConstants.INTERNAL_ACC_INTERFACE |
ClassConstants.INTERNAL_ACC_ABSTRACT)) == 0 &&
!KeepMarker.isKept(programClass) &&
programClass.subClasses == null)
{
programClass.u2accessFlags |= ClassConstants.INTERNAL_ACC_FINAL;
// Visit the class, if required.
if (extraClassVisitor != null)
{
extraClassVisitor.visitProgramClass(programClass);
}
}
}
}
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