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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2009 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.SimplifiedVisitor;
import proguard.classfile.visitor.*;
/**
* This ClassVisitor inlines siblings in the program classes that it visits,
* whenever possible.
*
* @see ClassMerger
* @author Eric Lafortune
*/
public class HorizontalClassMerger
extends SimplifiedVisitor
implements ClassVisitor
{
private final boolean allowAccessModification;
private final boolean mergeInterfacesAggressively;
private final ClassVisitor extraClassVisitor;
/**
* Creates a new HorizontalClassMerger.
* @param allowAccessModification specifies whether the access modifiers
* of classes can be changed in order to
* merge them.
* @param mergeInterfacesAggressively specifies whether interfaces may
* be merged aggressively.
*/
public HorizontalClassMerger(boolean allowAccessModification,
boolean mergeInterfacesAggressively)
{
this(allowAccessModification, mergeInterfacesAggressively, null);
}
/**
* Creates a new VerticalClassMerger.
* @param allowAccessModification specifies whether the access modifiers
* of classes can be changed in order to
* merge them.
* @param mergeInterfacesAggressively specifies whether interfaces may
* be merged aggressively.
* @param extraClassVisitor an optional extra visitor for all
* merged classes.
*/
public HorizontalClassMerger(boolean allowAccessModification,
boolean mergeInterfacesAggressively,
ClassVisitor extraClassVisitor)
{
this.allowAccessModification = allowAccessModification;
this.mergeInterfacesAggressively = mergeInterfacesAggressively;
this.extraClassVisitor = extraClassVisitor;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
programClass.superClassConstantAccept(new ReferencedClassVisitor(
new SubclassTraveler(
new ProgramClassFilter(
new ClassMerger(programClass,
allowAccessModification,
mergeInterfacesAggressively,
extraClassVisitor)))));
}
}
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