package org.drools.examples.petstore;
/*
* $Id: CheckoutCallback.java,v 1.2 2004/09/17 00:37:57 mproctor Exp $
*
* Copyright 2001-2003 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company. (http://werken.com/)
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
import java.util.List;
import javax.swing.JFrame;
import org.drools.FactException;
import org.drools.RuleBase;
import org.drools.WorkingMemory;
/**
* @author mproctor
*
* This callback is called when the user pressed the checkout button. It is
* responsible for adding the items to the shopping cart, asserting the shopping
* cart and then firing all rules.
*
* A reference to the JFrame is also passed so the rules can launch dialog boxes
* for user interaction. It uses the ApplicationData feature for this.
*
*/
public class CheckoutCallback
{
RuleBase ruleBase;
public CheckoutCallback(RuleBase ruleBase)
{
this.ruleBase = ruleBase;
}
/**
* Populate the cart and assert into working memory Pass Jframe reference
* for user interaction
*
* @param frame
* @param items
* @return cart.toString();
*/
public String checkout(JFrame frame, List items) throws FactException
{
ShoppingCart cart = new ShoppingCart( );
//Iterate through list and add to cart
for ( int i = 0; i < items.size( ); i++ )
{
cart.addItem( ( CartItem ) items.get( i ) );
}
//add the JFrame to the ApplicationData to allow for user interaction
WorkingMemory workingMemory = ruleBase.newWorkingMemory( );
workingMemory.setApplicationData( "frame", frame );
workingMemory.assertObject( cart );
workingMemory.fireAllRules( );
//returns the state of the cart
return cart.toString( );
}
}