/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.commons.collections.set;

import java.util.Collection;
import java.util.Set;
import org.apache.commons.collections.collection.CompositeCollection;

/**
 * This class is used in TestCompositeSet. When testing serialization,
 * the class has to be separate of TestCompositeSet, else the test
 * class also has to be serialized.
 */
class EmptySetMutator implements CompositeSet.SetMutator {
    private Set contained;

    public EmptySetMutator( Set set ) {
        this.contained = set;
    }

    public void resolveCollision( CompositeSet comp, Set existing,
                                  Set added, Collection intersects ) {
        throw new IllegalArgumentException();
    }

    public boolean add( CompositeCollection composite,
                        Collection[] collections, Object obj ) {
        return contained.add(obj);
    }

    public boolean addAll( CompositeCollection composite,
                           Collection[] collections, Collection coll ) {
        return contained.addAll(coll);
    }

    public boolean remove( CompositeCollection composite,
                           Collection[] collections, Object obj ) {
        return contained.remove(obj);
    }
}
