/*

 * 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.collections4.set;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.util.Collection;

import java.util.Set;

/**

 * Serializable subclass of AbstractSetDecorator.

 *

 * @param <E> the type of the elements in this set

 * @since 3.1

 */

public abstract class AbstractSerializableSetDecorator<E>

        extends AbstractSetDecorator<E> {

    /** Serialization version */

    private static final long serialVersionUID = 1229469966212206107L;

    /**

     * Constructor.

     *

     * @param set  the list to decorate, must not be null

     * @throws NullPointerException if set is null

     */

    protected AbstractSerializableSetDecorator(final Set<E> set) {

        super(set);

    }

    //-----------------------------------------------------------------------

    /**

     * Write the set out using a custom routine.

     *

     * @param out  the output stream

     * @throws IOException if an error occurs while writing to the stream

     */

    private void writeObject(final ObjectOutputStream out) throws IOException {

        out.defaultWriteObject();

        out.writeObject(decorated());

    }

    /**

     * Read the set in using a custom routine.

     *

     * @param in  the input stream

     * @throws IOException if an error occurs while reading from the stream

     * @throws ClassNotFoundException if an object read from the stream can not be loaded

     */

    @SuppressWarnings("unchecked")

    private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {

        in.defaultReadObject();

        setCollection((Collection<E>) in.readObject());

    }

}