/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * 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.constant.visitor;

import proguard.classfile.Clazz;
import proguard.classfile.constant.ClassConstant;
import proguard.classfile.util.SimplifiedVisitor;

/**
 * This <code>ConstantVisitor</code> delegates its visits to class constants
 * to another given <code>ConstantVisitor</code>, except for one given class.
 *
 * @author Eric Lafortune
 */
public class ExceptClassConstantFilter
extends      SimplifiedVisitor
implements   ConstantVisitor
{
    private final String           exceptClassName;
    private final ConstantVisitor constantVisitor;


    /**
     * Creates a new ExceptClassConstantFilter.
     * @param exceptClassName the name of the class that will not be visited.
     * @param constantVisitor the <code>ConstantVisitor</code> to which visits
     *                        will be delegated.
     */
    public ExceptClassConstantFilter(String          exceptClassName,
                                     ConstantVisitor constantVisitor)
    {
        this.exceptClassName = exceptClassName;
        this.constantVisitor = constantVisitor;
    }


    // Implementations for ConstantVisitor.

    public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
    {
        if (!classConstant.getName(clazz).equals(exceptClassName))
        {
            constantVisitor.visitClassConstant(clazz, classConstant);
        }
    }
}