content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF 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
   *
   *     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,
   * 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.
   */
  
  package org.apache.avro.mapred.tether;
  
  import java.nio.ByteBuffer;
  
  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.mapred.AvroJob;
  
  /** The {@link RawComparator} used by jobs configured with {@link TetherJob}. */
  class TetherKeyComparator extends Configured implements RawComparator<TetherData> {
  
    private Schema schema;
  
    @Override
    public void setConf(Configuration conf) {
      super.setConf(conf);
      if (conf != null)
        schema = AvroJob.getMapOutputSchema(conf);
    }
  
    @Override
    public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
      int diff = BinaryData.compare(b1, BinaryData.skipLong(b1, s1), l1, b2, BinaryData.skipLong(b2, s2), l2, schema);
      return diff == 0 ? -1 : diff;
    }
  
    @Override
    public int compare(TetherData x, TetherData y) {
      ByteBuffer b1 = x.buffer(), b2 = y.buffer();
      int diff = BinaryData.compare(b1.array(), b1.position(), b2.array(), b2.position(), schema);
      return diff == 0 ? -1 : diff;
    }
  
  }
  