001    /*
002     * Copyright (c) 2007-2014 Concurrent, 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    
021    package cascading.tuple.hadoop.io;
022    
023    import java.io.IOException;
024    
025    import cascading.tuple.hadoop.TupleSerialization;
026    import cascading.tuple.io.IndexTuple;
027    
028    public class IndexTupleDeserializer extends BaseDeserializer<IndexTuple>
029      {
030      public IndexTupleDeserializer( TupleSerialization.SerializationElementReader elementReader )
031        {
032        super( elementReader );
033        }
034    
035      public IndexTuple deserialize( IndexTuple indexTuple ) throws IOException
036        {
037        if( indexTuple == null )
038          return inputStream.readIndexTuple();
039    
040        return inputStream.readIndexTuple( indexTuple );
041        }
042      }