// Person.java

import  java.util.*;

public
    class       Person
    extends     Observable
    implements  NamedObject
    {
    static final String oStringChangedAddress   = "changedAddress"  .intern();
    static final String oStringChangedName      = "changedName"     .intern();
    static final String oStringChangedPhone     = "changedPhone"    .intern();

    private Object  oAddress;
    private Object  oName;
    private Object  oPhone;

//  CONSTRUCTORS

    public
        Person
        (
        Object poName,
        Object poAddress,
        Object poPhone
        )
        {
        oName       = poName;
        oAddress    = poAddress;
        oPhone      = poPhone;
        }

    public
        Person
        (
        String poName,
        String poAddress,
        String poPhone
        )
        {
        oName       = objectForString(poName    );
        oAddress    = objectForString(poAddress );
        oPhone      = objectForString(poPhone   );
        }

    public
        Person
        (
        )
        {
        this("","","");
        }

//  PUBLIC METHODS

    public
        boolean equals
        (
        Object poObject
        )
        {
        return (getClass() == poObject.getClass())
                    ?equalAttributes(poObject)
                    :false;
        }

    public
        Object  getAddress
        (
        )
        {
        return oAddress;
        }

    public
        Object  getName
        (
        )
        {
        return oName;
        }

    public
        Object  getPhone
        (
        )
        {
        return oPhone;
        }

    public
        int     hashCode
        (
        )
        {
        return  0
            ^ getAddress().hashCode()
            ^ getName   ().hashCode()
            ^ getPhone  ().hashCode()
            ;
        }

    public
        Object  objectForString
        (
        String  poString
        )
        {
        return poString;
        }

    public
        void    setAddress
        (
        Object  poAddress
        )
        {
        oAddress = poAddress;
        setChanged();
        notifyObservers(oStringChangedAddress);
        }

    public
        void    setName
        (
        Object  poName
        )
        {
        oName = poName;
        setChanged();
        notifyObservers(oStringChangedName);
        }

    public
        void    setPhone
        (
        Object  poPhone
        )
        {
        oPhone = poPhone;
        setChanged();
        notifyObservers(oStringChangedPhone);
        }

    public
        String  toString
        (
        )
        {
        return getName().toString();
        }

// PROTECTED METHODS

    protected
        boolean equalAttributes
        (
        Object  poObject
        )
        {
        Person  oPerson = (Person)poObject;
        return  true
            &&  getName     ().equals(oPerson.getName       ())
            &&  getAddress  ().equals(oPerson.getAddress    ())
            &&  getPhone    ().equals(oPerson.getPhone      ())
            ;
        }
    }