Hadoop WritableComparable

gistfile1.java

     public class MyWritableComparable implements WritableComparable {
       // Some data
       private int counter;
       private long timestamp;
       
       public void write(DataOutput out) throws IOException {
         out.writeInt(counter);
         out.writeLong(timestamp);
       }
       
       public void readFields(DataInput in) throws IOException {
         counter = in.readInt();
         timestamp = in.readLong();
       }
       
       public int compareTo(MyWritableComparable w) {
         int thisValue = this.value;
         int thatValue = ((IntWritable)o).value;
         return (thisValue < thatValue ? -1 : (thisValue==thatValue ? 0 : 1));
       }
     }