content: package com.manning.hip.ch7.friendsofafriend;
  
  import org.apache.hadoop.io.*;
  
  import java.io.*;
  
  public class Person implements WritableComparable<Person> {
  
  	private String name = "";
  	private long commonFriends = 0;
  
    public Person() {
    }
  
    public Person(String name, long commonFriends) {
      this.name = name;
      this.commonFriends = commonFriends;
    }
  
    public void set(String name, long commonFriends) {
  		this.name = name;
  		this.commonFriends = commonFriends;
  	}
  
  	public String getName() {
  		return this.name;
  	}
  
  	public long getCommonFriends() {
  		return this.commonFriends;
  	}
  
  	@Override
  	public void readFields(DataInput in) throws IOException {
  		this.name = in.readUTF();
  		this.commonFriends = in.readLong();
  	}
  
  	@Override
  	public void write(DataOutput out) throws IOException {
  		out.writeUTF(name);
  		out.writeLong(this.commonFriends);
  	}
  
  	@Override
  	public int compareTo(Person other) {
  		if (this.name.compareTo(other.name) != 0) {
  			return this.name.compareTo(other.name);
  		} else if (this.commonFriends != other.commonFriends) {
  			return commonFriends < other.commonFriends ? -1 : 1;
  		} else {
  			return 0;
  		}
  	}
  
  	public static class PersonKeyComparator extends WritableComparator {
  		public PersonKeyComparator() {
  			super(Person.class);
  		}
  
  		public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
  			return compareBytes(b1, s1, l1, b2, s2, l2);
  		}
  	}
  
  	static { // register this comparator
  		WritableComparator.define(Person.class,
  				new PersonKeyComparator());
  	}
  }
  