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.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.hadoop.io.serializer.Serialization;
  import org.apache.hadoop.io.serializer.Deserializer;
  import org.apache.hadoop.io.serializer.Serializer;
  import org.apache.hadoop.conf.Configured;
  
  import org.apache.avro.io.BinaryEncoder;
  import org.apache.avro.io.BinaryDecoder;
  import org.apache.avro.io.DecoderFactory;
  import org.apache.avro.io.EncoderFactory;
  
  /** A {@link Serialization} for {@link TetherData}. */
  class TetherKeySerialization extends Configured implements Serialization<TetherData> {
  
    public boolean accept(Class<?> c) {
      return TetherData.class.isAssignableFrom(c);
    }
  
    public Deserializer<TetherData> getDeserializer(Class<TetherData> c) {
      return new TetherDataDeserializer();
    }
  
    private static final DecoderFactory FACTORY = DecoderFactory.get();
  
    private class TetherDataDeserializer implements Deserializer<TetherData> {
      private BinaryDecoder decoder;
  
      public void open(InputStream in) {
        this.decoder = FACTORY.directBinaryDecoder(in, decoder);
      }
  
      public TetherData deserialize(TetherData datum) throws IOException {
        if (datum == null)
          datum = new TetherData();
        datum.buffer(decoder.readBytes(datum.buffer()));
        return datum;
      }
  
      public void close() throws IOException {
        decoder.inputStream().close();
      }
    }
  
    public Serializer<TetherData> getSerializer(Class<TetherData> c) {
      return new TetherDataSerializer();
    }
  
    private class TetherDataSerializer implements Serializer<TetherData> {
  
      private OutputStream out;
      private BinaryEncoder encoder;
  
      public void open(OutputStream out) {
        this.out = out;
        this.encoder = EncoderFactory.get().directBinaryEncoder(out, encoder);
      }
  
      public void serialize(TetherData datum) throws IOException {
        encoder.writeBytes(datum.buffer());
        encoder.flush(); // Flush shouldn't be required. Might be a bug in AVRO.
      }
  
      public void close() throws IOException {
        encoder.flush();
        out.close();
      }
  
    }
  
  }
  