src/java/org/apache/cassandra/io/ForwardingVersionedSerializer.java

/*
 * 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.cassandra.io;

import java.io.IOException;

import org.apache.cassandra.io.util.DataInputPlus;
import org.apache.cassandra.io.util.DataOutputPlus;

/**
 * A serializer which forwards all its method calls to another serializer. Subclasses should override one or more
 * methods to modify the behavior of the backing serializer as desired per the decorator pattern.
 */
public abstract class ForwardingVersionedSerializer<T> implements IVersionedSerializer<T>
{
    protected ForwardingVersionedSerializer()
    {
    }

    /**
     * Returns the backing delegate instance that methods are forwarded to.
     *
     * @param version the server version
     * @return the backing delegate instance that methods are forwarded to.
     */
    protected abstract IVersionedSerializer<T> delegate(int version);

    public void serialize(T t, DataOutputPlus out, int version) throws IOException
    {
        delegate(version).serialize(t, out, version);
    }

    public T deserialize(DataInputPlus in, int version) throws IOException
    {
        return delegate(version).deserialize(in, version);
    }

    public long serializedSize(T t, int version)
    {
        return delegate(version).serializedSize(t, version);
    }
}