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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare
*
* 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.info;
import proguard.classfile.*;
import proguard.classfile.visitor.ClassVisitor;
/**
* This ClassVisitor delegates its visits to one of two other given
* ClassVisitor instances, depending on whether the classes are marked
* as simple enums or not.
*
* @see SimpleEnumMarker
*
* @author Eric Lafortune
*/
public class SimpleEnumFilter
implements ClassVisitor
{
private final ClassVisitor simpleEnumClassVisitor;
private final ClassVisitor otherClassVisitor;
/**
* Creates a new SimpleEnumClassFilter.
*
* @param simpleEnumClassVisitor the class visitor to which visits to
* classes that are marked to be simpleEnum
* will be delegated.
*/
public SimpleEnumFilter(ClassVisitor simpleEnumClassVisitor)
{
this(simpleEnumClassVisitor, null);
}
/**
* Creates a new SimpleEnumClassFilter.
*
* @param simpleEnumClassVisitor the class visitor to which visits to
* classes that are marked as simple enums
* will be delegated.
* @param otherClassVisitor the class visitor to which visits to
* classes that are not marked as simple
* enums will be delegated.
*/
public SimpleEnumFilter(ClassVisitor simpleEnumClassVisitor,
ClassVisitor otherClassVisitor)
{
this.simpleEnumClassVisitor = simpleEnumClassVisitor;
this.otherClassVisitor = otherClassVisitor;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Is the class marked as a simple enum?
ClassVisitor classVisitor = SimpleEnumMarker.isSimpleEnum(programClass) ?
simpleEnumClassVisitor : otherClassVisitor;
if (classVisitor != null)
{
classVisitor.visitProgramClass(programClass);
}
}
public void visitLibraryClass(LibraryClass libraryClass)
{
// A library class can't be marked as a simple enum.
if (otherClassVisitor != null)
{
otherClassVisitor.visitLibraryClass(libraryClass);
}
}
}
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