lineitem.java

Java项目案例导航

package examples;

import java.sql.*;
import javax.naming.*;
import javax.ejb.*;
import java.util.*;
import java.rmi.RemoteException;
import javax.naming.*;

/**
 * A lineitem is a quantity of a single Book.
 * Many line-items together form an entire order or cart.
 */
public class LineItem implements java.io.Serializable {
    
    /*
     * BookItem has Book id, name of the Book and description
     */
    public BookItem bookItem;
    /*
     * Number of items
     */
    public int quantity;
    /*
     * Amount of the discount for each item
     */
    public double discount;
        
	//------------------------------------------------
	// Begin business methods
	//------------------------------------------------
    /**
     * Constructor
     * @param bookitem
     * @param number of items
     * @Param discount for each item 
     */
	public LineItem(BookItem bookItem, int quantity, double discount) {
        System.out.println("LineItem(...) called");
		this.bookItem = bookItem;
        this.quantity = quantity;
		this.discount = discount;
	}
	
    /**
     * Constructor
     */
	public LineItem() {
		System.out.println("New LineItem created.");
	}
    
    /**
	 * Returns the Bookitem.
     * Bookitem has Book id, name of the Book and description
     */
	public BookItem getBookItem()  {
		System.out.println("LineItem.getBook() called.");
		return bookItem;
	}
    
    /**
     * sets the Bookitem.
     * Bookitem has Book id, name of the Book and description
     **/
	public void setBook(BookItem bookItem)  {
		System.out.println("LineItem.setBook() called.");
		this.bookItem = bookItem;
	}

    /**
     * Returns the number of items.
     **/
	public int getQuantity()  {
		System.out.println("LineItem.getQuantity() called.");
		return quantity;
	}
  
    /**
     * Sets the number of items.
     **/
	public void setQuantity(int quantity)  {
		System.out.println("LineItem.setQuantity() called.");
		this.quantity = quantity;
	}
	
	/**
	 * Returns the base price.  The base price is the
	 * Book's price times the quantity ordered.  This
	 * figure does not take discounts into consideration.
	 */
    public double getBasePrice()  {
		System.out.println("LineItem.getBasePrice() called.");
		return quantity * bookItem.getBasePrice();
	}

	/**
	 * Returns the discount that the customer gets on
	 * this order.
	 *
	 * Note: The discount is a whole number, not
	 *       a percentage discount.
	 */
	public double getDiscount()  {
		System.out.println("LineItem.getDiscount() called.");
		return discount;
	}

	/**
	 * Sets the discount that the customer gets on
	 * this order.
	 *
	 * Note: The discount is a whole number, not
	 *       a percentage discount.
	 */
   public void setDiscount(double discount)  {
		System.out.println("LineItem.setDiscount() called.");
		this.discount = discount;
	}
        
	//------------------------------------------------
	// End business methods
	//------------------------------------------------
}