Person.java

package hip.ch6.sort.secondary;

import org.apache.hadoop.io.WritableComparable;

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

public class Person implements WritableComparable<Person> {

  private String firstName;
  private String lastName;

  public Person() {
  }

  public String getFirstName() {
    return firstName;
  }

  public void setFirstName(String firstName) {
    this.firstName = firstName;
  }

  public String getLastName() {
    return lastName;
  }

  public void setLastName(String lastName) {
    this.lastName = lastName;
  }

  @Override
  public void readFields(DataInput in) throws IOException {
    this.lastName = in.readUTF();
    this.firstName = in.readUTF();
  }

  @Override
  public void write(DataOutput out) throws IOException {
    out.writeUTF(lastName);
    out.writeUTF(firstName);
  }

  @Override
  public int compareTo(Person other) {
    int cmp = this.lastName.compareTo(other.lastName);
    if (cmp != 0) {
      return cmp;
    }
    return this.firstName.compareTo(other.firstName);
  }

  public void set(String lastName, String firstName) {
    this.lastName = lastName;
    this.firstName = firstName;
  }
}