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
   *
   *   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.
   */
  package org.apache.apex.malhar.hive;
  
  import java.io.ByteArrayOutputStream;
  import java.io.Externalizable;
  import java.io.IOException;
  import java.io.ObjectInput;
  import java.io.ObjectOutput;
  import java.io.ObjectOutputStream;
  
  import org.apache.apex.malhar.lib.codec.KryoSerializableStreamCodec;
  
  import com.esotericsoftware.kryo.io.Input;
  import com.esotericsoftware.kryo.io.Output;
  
  /**
   * Stream codec for uniform distribution of tuples on upstream operator. This is
   * used to make sure that data being sent to a particular hive partition goes to
   * a specific operator partition by passing FSRollingOutputOperator to the
   * stream codec.
   *
   * @since 2.1.0
   */
  public class HiveStreamCodec<T> extends KryoSerializableStreamCodec<T> implements Externalizable
  {
    private static final long serialVersionUID = 201412121604L;
  
    protected AbstractFSRollingOutputOperator<T> rollingOperator;
  
    @Override
    public void writeExternal(ObjectOutput out) throws IOException
    {
  
      ByteArrayOutputStream os = new ByteArrayOutputStream();
      ObjectOutputStream obj = new ObjectOutputStream(os);
      Output output = new Output(obj);
      kryo.writeClassAndObject(output, rollingOperator);
      byte[] outBytes = output.toBytes();
      out.writeInt(outBytes.length);
      out.write(outBytes, 0, outBytes.length);
      out.flush();
    }
  
    @Override
    @SuppressWarnings("unchecked")
    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
    {
      int size = in.readInt();
      byte[] data = new byte[size];
      in.readFully(data);
      Input input = new Input(data);
      input.setBuffer(data);
      rollingOperator = (AbstractFSRollingOutputOperator)kryo.readClassAndObject(input);
    }
  
    @Override
    public int getPartition(T o)
    {
      return rollingOperator.getHivePartition(o).hashCode();
    }
  
  }
  