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.util; 022 023 import java.util.Comparator; 024 025 import cascading.tuple.hadoop.TupleSerialization; 026 import cascading.tuple.util.TupleHasher; 027 import org.apache.hadoop.mapred.JobConf; 028 import org.apache.hadoop.mapred.JobConfigurable; 029 030 /** 031 * 032 */ 033 public class HasherPartitioner extends TupleHasher implements JobConfigurable 034 { 035 private static Comparator defaultComparator; 036 private Comparator[] comparators; 037 038 public void configure( JobConf jobConf ) 039 { 040 defaultComparator = TupleSerialization.getDefaultComparator( defaultComparator, jobConf ); 041 042 comparators = DeserializerComparator.getFieldComparatorsFrom( jobConf, "cascading.group.comparator" ); 043 044 initialize( defaultComparator, comparators ); 045 } 046 }