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  }