colossal.pipe.ColKeyComparator.java Source code

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Here is the source code for colossal.pipe.ColKeyComparator.java

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/*
 * Licensed to Think Big Analytics, Inc. under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Think Big Analytics, Inc. licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Copyright 2010 Think Big Analytics. All Rights Reserved.
 */
package colossal.pipe;

import org.apache.avro.Schema;
import org.apache.avro.io.BinaryData;
import org.apache.avro.mapred.AvroJob;
import org.apache.avro.mapred.AvroWrapper;
import org.apache.avro.specific.SpecificData;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.io.RawComparator;

/** The {@link RawComparator} used by jobs configured with {@link AvroJob}. */
public class ColKeyComparator<T> extends Configured implements RawComparator<AvroWrapper<T>> {

    private Schema schema;

    @Override
    public void setConf(Configuration conf) {
        super.setConf(conf);
        if (conf != null) {
            String schemaJson = conf.get(ColPhase.MAP_OUT_KEY_SCHEMA);
            schema = Schema.parse(schemaJson);
        }
    }

    public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
        return BinaryData.compare(b1, s1, b2, s2, schema);
    }

    public int compare(AvroWrapper<T> x, AvroWrapper<T> y) {
        return SpecificData.get().compare(x.datum(), y.datum(), schema);
    }

}