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.KeyIndexTuple; 025 026public class KeyIndexTupleDeserializer extends IndexTupleDeserializer<KeyIndexTuple> 027 { 028 public KeyIndexTupleDeserializer( TupleSerialization.SerializationElementReader elementReader ) 029 { 030 super( elementReader ); 031 032 typeMap = elementReader.getTupleSerialization().getKeyTypeMap(); 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().getKeyFieldsMap() ); 038 } 039 } 040 041 @Override 042 protected KeyIndexTuple createTuple() 043 { 044 return new KeyIndexTuple(); 045 } 046 047 @Override 048 protected Class[] getTypesFor( int ordinal ) 049 { 050 return typeMap.get( ordinal ); 051 } 052 }