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 cascading.tuple.hadoop.TupleSerialization;
024import cascading.tuple.io.ValueIndexTuple;
025
026public class ValueIndexTupleDeserializer extends IndexTupleDeserializer<ValueIndexTuple>
027  {
028  public ValueIndexTupleDeserializer( TupleSerialization.SerializationElementReader elementReader )
029    {
030    super( elementReader );
031
032    typeMap = elementReader.getTupleSerialization().getMaskedValueTypeMap();
033
034    if( elementReader.getTupleSerialization().areTypesRequired() )
035      {
036      if( typeMap == null || typeMap.isEmpty() )
037        throw new IllegalStateException( "types are required to perform serialization, fields: " + elementReader.getTupleSerialization().getValueFieldsMap() );
038      }
039    }
040
041  @Override
042  protected ValueIndexTuple createTuple()
043    {
044    return new ValueIndexTuple();
045    }
046
047  @Override
048  protected Class[] getTypesFor( int ordinal )
049    {
050    return typeMap.get( ordinal );
051    }
052  }