/* 
 *  =================================================================
 *  Book.java: Create a book object with an association to a customer
 *  =================================================================
 */

public class Book {
    // Data attributes

    private String   name;
    private String author;

    // Set relationship ....

    private Customer owner;

    // Constructor

    public Book () {
       this.owner = null;
    }

    // String representations  ...

    public String toString() {
       String s = "Book   name: " + getName()   + "\n" +
                  "     author: " + getAuthor() + "\n";

       if (this.owner != null )
           s += "   owned by: " + owner.getName() + "\n";

       return s;
    }

    // Set and access attributes 

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    // Association accessor methods ...

    public Customer getCustomer() {
        return owner;
    }

    public void setCustomer( Customer owner ) {
        if (owner != null) 
            this.owner = owner;
    }
}