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.trevni.avro.mapreduce;
  
  import java.io.IOException;
  
  import org.apache.avro.mapred.AvroKey;
  import org.apache.hadoop.io.NullWritable;
  
  /**
   * Reads records from an input split representing a chunk of an Trenvi container
   * file.
   *
   * @param <T> The (java) type of data in Trevni container file.
   */
  public class AvroTrevniKeyRecordReader<T> extends AvroTrevniRecordReaderBase<AvroKey<T>, NullWritable, T> {
  
    /** A reusable object to hold records of the Avro container file. */
    private final AvroKey<T> mCurrentKey = new AvroKey<>();
  
    /** {@inheritDoc} */
    @Override
    public AvroKey<T> getCurrentKey() throws IOException, InterruptedException {
      return mCurrentKey;
    }
  
    /** {@inheritDoc} */
    @Override
    public NullWritable getCurrentValue() throws IOException, InterruptedException {
      return NullWritable.get();
    }
  
    /** {@inheritDoc} */
    @Override
    public boolean nextKeyValue() throws IOException, InterruptedException {
      boolean hasNext = super.nextKeyValue();
      mCurrentKey.datum(getCurrentRecord());
      return hasNext;
    }
  
  }
  