    001/*
    002 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.tuple.hadoop.io;
    022
    023import java.io.IOException;
    024
    025import cascading.tuple.Tuple;
    026import cascading.tuple.hadoop.TupleSerialization;
    027
    028public class TupleDeserializer extends BaseDeserializer<Tuple>
    029  {
    030  public TupleDeserializer( TupleSerialization.SerializationElementReader elementReader )
    031    {
    032    super( elementReader );
    033    }
    034
    035  public Tuple deserialize( Tuple tuple ) throws IOException
    036    {
    037    if( tuple == null )
    038      return inputStream.readTuple();
    039
    040    return inputStream.readTuple( tuple );
    041    }
    042
    043  @Override
    044  protected Tuple createTuple()
    045    {
    046    return null; // unused
    047    }
    048  }