/*
 * Author: G Towell
 * File: Animal.java
 * Desc: A very basic definition of an animal
 */
public class Animal
{
    /*************
     * The only thing know about every animal, its ID.
     * And that ID, once set, can never change.
     */
    private final String id;
    
    /*******
     * The default constructor.  But overridden to make it private.  
     * Therefore no one can ever use it!
     * 
     */
    private Animal()
    {
	// NEVER USE THIS
	id=null;
    }
    
    /****
     * The constructor of Animal that should be used.
     * @param id the identifier of the animal
     */
    public Animal(String id)
    {
	this.id=id;
    }
    
    /***
     * Get the id
     * @return the id
     */
    public String getId()
    {
	return id;
    }
    
}