package org.drools.examples.petstore;/* * $Id: ShoppingCart.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.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;public class ShoppingCart{    private List          items;    private double        discount;    private Map           states;    private static String newline = System.getProperty( "line.separator" );    public ShoppingCart()    {        states = new HashMap( );        this.items = new ArrayList( );        this.discount = 0;    }    public boolean getState(String state)    {        if ( states.containsKey( state ) )        {            return ( ( Boolean ) states.get( state ) ).booleanValue( );        }        else        {            return false;        }    }    public void setState(String state, boolean value)    {        states.put( state, new Boolean( value ) );    }    public void setDiscount(double discount)    {        this.discount = discount;    }    public double getDiscount()    {        return this.discount;    }    public void addItem(CartItem item)    {        this.items.add( item );    }    public List getItems()    {        return this.items;    }    public List getItems(String name)    {        ArrayList matching = new ArrayList( );        Iterator itemIter = getItems( ).iterator( );        CartItem eachItem = null;        while ( itemIter.hasNext( ) )        {            eachItem = ( CartItem ) itemIter.next( );            if ( eachItem.getName( ).equals( name ) )            {                matching.add( eachItem );            }        }        return matching;    }    public double getGrossCost()    {        Iterator itemIter = getItems( ).iterator( );        CartItem eachItem = null;        double cost = 0.00;        while ( itemIter.hasNext( ) )        {            eachItem = ( CartItem ) itemIter.next( );            cost += eachItem.getCost( );        }        return cost;    }    public double getDiscountedCost()    {        double cost = getGrossCost( );        double discount = getDiscount( );        double discountedCost = cost * ( 1 - discount );        return discountedCost;    }    public String toString()    {        StringBuffer buf = new StringBuffer( );        buf.append( "ShoppingCart:" + newline );        Iterator itemIter = getItems( ).iterator( );        while ( itemIter.hasNext( ) )        {            buf.append( "\t" + itemIter.next( ) + newline );        }        buf.append( "gross total=" + getGrossCost( ) + newline );        buf.append( "discounted total=" + getDiscountedCost( ) + newline );        return buf.toString( );    }}