org.apache.avro.mapred.AvroKeyComparator Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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
*
* https://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,
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*/
package org.apache.avro.mapred;
import org.apache.hadoop.io.RawComparator;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.conf.Configuration;
import org.apache.avro.Schema;
import org.apache.avro.io.BinaryData;
import org.apache.avro.reflect.ReflectData;
/** The {@link RawComparator} used by jobs configured with {@link AvroJob}. */
public class AvroKeyComparator extends Configured implements RawComparator> {
private Schema schema;
@Override
public void setConf(Configuration conf) {
super.setConf(conf);
if (conf != null)
schema = Pair.getKeySchema(AvroJob.getMapOutputSchema(conf));
}
@Override
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
return BinaryData.compare(b1, s1, l1, b2, s2, l2, schema);
}
@Override
public int compare(AvroWrapper x, AvroWrapper y) {
return ReflectData.get().compare(x.datum(), y.datum(), schema);
}
}