MyKey.java

package com.antbrains.crf.hadoop;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.io.WritableComparable;

public class MyKey implements WritableComparable {
  public MyKey() {

  }

  public MyKey(int id, double score) {
    this.id = id;
    this.score = score;
  }

  public int id;
  public double score;

  @Override
  public void readFields(DataInput in) throws IOException {
    id = in.readInt();
    score = in.readDouble();
  }

  @Override
  public void write(DataOutput out) throws IOException {
    out.writeInt(id);
    out.writeDouble(score);
  }

  @Override
  public int compareTo(Object o) {
    MyKey other = (MyKey) o;
    if (score < other.score) {
      return 1;
    } else if (score > other.score) {
      return -1;
    }
    if (this.id < other.id)
      return -1;
    return 1;
  }

}