    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      }