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package org.approvaltests.hadoop.version2;

import java.io.IOException;
import java.util.Iterator;

import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;

public class ReducerWrapper
    implements
      SmartReducer
{
  private final Class                              keyIn;
  private final Class                            valueIn;
  private final Class                             keyOut;
  private final Class                           valueOut;
  private final Reducer reducer;
  public ReducerWrapper(Reducer reducer, Class keyIn,
      Class valueIn, Class keyOut, Class valueOut)
  {
    this.reducer = reducer;
    this.keyIn = keyIn;
    this.valueIn = valueIn;
    this.keyOut = keyOut;
    this.valueOut = valueOut;
  }
  @Override
  public Class getKeyInType()
  {
    return keyIn;
  }
  @Override
  public Class getValueInType()
  {
    return valueIn;
  }
  @Override
  public Class getKeyOutType()
  {
    return keyOut;
  }
  @Override
  public Class getValueOutType()
  {
    return valueOut;
  }
  @Override
  public void reduce(KeyIn arg0, Iterator arg1, OutputCollector arg2, Reporter arg3)
      throws IOException
  {
    reducer.reduce(arg0, arg1, arg2, arg3);
  }
  @Override
  public void configure(JobConf arg0)
  {
    reducer.configure(arg0);
  }
  @Override
  public void close() throws IOException
  {
    reducer.close();
  }
}