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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.classfile.visitor;
import proguard.classfile.*;
/**
* This <code>ClassVisitor</code> lets a given <code>ClassVisitor</code>
* travel to the first concrete subclasses down in its hierarchy of abstract
* classes and concrete classes.
*
* @author Eric Lafortune
*/
public class ConcreteClassDownTraveler
implements ClassVisitor
{
private final ClassVisitor classVisitor;
/**
* Creates a new ConcreteClassDownTraveler.
* @param classVisitor the <code>ClassVisitor</code> to
* which visits will be delegated.
*/
public ConcreteClassDownTraveler(ClassVisitor classVisitor)
{
this.classVisitor = classVisitor;
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Is this an abstract class or an interface?
if ((programClass.getAccessFlags() &
(ClassConstants.INTERNAL_ACC_INTERFACE |
ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0)
{
// Travel down the hierarchy.
Clazz[] subClasses = programClass.subClasses;
if (subClasses != null)
{
for (int index = 0; index < subClasses.length; index++)
{
subClasses[index].accept(this);
}
}
}
else
{
// Visit the class. Don't descend any further.
programClass.accept(classVisitor);
}
}
public void visitLibraryClass(LibraryClass libraryClass)
{
// Is this an abstract class or interface?
if ((libraryClass.getAccessFlags() &
(ClassConstants.INTERNAL_ACC_INTERFACE |
ClassConstants.INTERNAL_ACC_ABSTRACT)) != 0)
{
// Travel down the hierarchy.
Clazz[] subClasses = libraryClass.subClasses;
if (subClasses != null)
{
for (int index = 0; index < subClasses.length; index++)
{
subClasses[index].accept(this);
}
}
}
else
{
// Visit the class. Don't descend any further.
libraryClass.accept(classVisitor);
}
}
}
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