001/*
002 * Copyright (c) 2007-2016 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
021package cascading.tuple.hadoop.io;
022
023import java.io.IOException;
024import java.util.Map;
025
026import cascading.tuple.hadoop.TupleSerialization;
027import cascading.tuple.io.IndexTuple;
028
029public class IndexTupleSerializer<T extends IndexTuple> extends BaseSerializer<T>
030  {
031  protected Map<Integer, Class[]> typeMap;
032
033  public IndexTupleSerializer( TupleSerialization.SerializationElementWriter elementWriter )
034    {
035    super( elementWriter );
036    }
037
038  public void serialize( T tuple ) throws IOException
039    {
040    outputStream.writeIntInternal( tuple.getIndex() );
041
042    Class[] types = getTypesFor( tuple.getIndex() );
043
044    if( types == null )
045      outputStream.writeUnTyped( tuple.getTuple() );
046    else
047      outputStream.writeTyped( types, tuple.getTuple() );
048    }
049
050  protected Class[] getTypesFor( int ordinal )
051    {
052    if( typeMap == null )
053      return null;
054
055    return typeMap.get( ordinal );
056    }
057  }