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/*
 * 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 com.gemstone.gemfire.internal;

import java.io.*;

/**
 * Abstract class for subclasses that want to be Externalizable in
 * addition to being DataSerializableFixedID.
 *  Note: subclasses must also provide a zero-arg constructor
 *
 * @author Darrel Schneider
 * @since 5.7 
 */
public abstract class ExternalizableDSFID
  implements DataSerializableFixedID, Externalizable
{
  public abstract int getDSFID();
  public abstract void toData(DataOutput out) throws IOException;
  public abstract void fromData(DataInput in) throws IOException, ClassNotFoundException;

  public final void writeExternal(ObjectOutput out) throws IOException {
    toData(out);
  }
  public final void readExternal(ObjectInput in)
    throws IOException, ClassNotFoundException {
    fromData(in);
  }
}