Java/EJB3/Shopping cart

EJB Tutorial from JBoss: simple shopping cart

   <source lang="java">

File: Order.java /*

* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/

package org.jboss.tutorial.entity.bean; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.OneToMany; import javax.persistence.Table; import javax.persistence.Id; import javax.persistence.CascadeType; import javax.persistence.FetchType; import java.util.ArrayList; import java.util.Collection; @Entity @Table(name = "PURCHASE_ORDER") public class Order implements java.io.Serializable {

  private int id;
  private double total;
  private Collection<LineItem> lineItems;
  @Id @GeneratedValue(strategy=GenerationType.AUTO)
  public int getId()
  {
     return id;
  }
  public void setId(int id)
  {
     this.id = id;
  }
  public double getTotal()
  {
     return total;
  }
  public void setTotal(double total)
  {
     this.total = total;
  }
  public void addPurchase(String product, int quantity, double price)
  {
     if (lineItems == null) lineItems = new ArrayList<LineItem>();
     LineItem item = new LineItem();
     item.setOrder(this);
     item.setProduct(product);
     item.setQuantity(quantity);
     item.setSubtotal(quantity * price);
     lineItems.add(item);
     total += quantity * price;
  }
  @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy="order")
  public Collection<LineItem> getLineItems()
  {
     return lineItems;
  }
  public void setLineItems(Collection<LineItem> lineItems)
  {
     this.lineItems = lineItems;
  }

}

File: ShoppingCart.java /*

* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/

package org.jboss.tutorial.entity.bean; import javax.ejb.Remove; /**

* Comment
*
* @author