/*

  * $Source: /usr/cvsroot/MelatiShopping/src/main/java/org/paneris/melati/shopping/MelatiShoppingConfig.java,v $

  * $Revision: 1.9 $

  *

  * Copyright (C) 2000 Tim Joyce

  *

  * Part of Melati (http://melati.org/ ), a framework for the rapid

  * development of clean, maintainable web applications.

  *

  * Melati is free software; Permission is granted to copy, distribute

  * and/or modify this software under the terms either:

  *

  * a) the GNU General Public License as published by the Free Software

  *    Foundation; either version 2 of the License, or (at your option)

  *    any later version,

  *

  *    or

  *

  * b) any version of the Melati Software License, as published

  *    at http://melati.org

  *

  * You should have received a copy of the GNU General Public License and

  * the Melati Software License along with this program;

  * if not, write to the Free Software Foundation, Inc.,

  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the

  * GNU General Public License and visit http://melati.org to obtain the

  * Melati Software License.

  *

  * Feel free to contact the Developers of Melati if you would like 

  * to work out a different arrangement than the options

  * outlined here.  It is our intention to allow Melati to be used by as

  * wide an audience as possible.

  *

  * This program 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 General Public License for more details.

  *

  * Contact details for copyright holder:

  *

  *     Tim Joyce <timj@paneris.org>

  *     http://paneris.org/~timj/

  *     68 Sandbanks Rd, Poole, Dorset. BH14 8BY. UK

  */

 package org.paneris.melati.shopping;

 import java.io.FileNotFoundException;

 import java.io.IOException;

 import java.util.Properties;

 import org.melati.util.MelatiBugMelatiException;

 import org.melati.util.PropertiesUtils;

 import org.melati.util.InstantiationPropertyException;

 /** 

  * The MelatiShoppingConfig provides configuration information for the Melati 

  * Shopping Interface.

  */

 public class MelatiShoppingConfig {

   private Properties configuration = null;

   private String ShoppingTrolleyProp = null;

   private String ShoppingTrolleyItemProp = null;

   private static Class clazz;

   static {

     try {

       clazz = Class.forName("org.paneris.melati.shopping.ShoppingTrolley");

     }

     catch (ClassNotFoundException e) {

       throw new MelatiBugMelatiException("Out of date Class.forName", e);

     }

   }

  /** 

   * Construct a MelatiShoppingConfig object.  

   * If the propeties file is not found default properties will be used.

   *

   * @throws ShoppingConfigException - if there is an error loading the file

   */

   public MelatiShoppingConfig() throws ShoppingConfigException {

     String pref = clazz.getName() + ".";

     ShoppingTrolleyProp = pref + "trolley";

     ShoppingTrolleyItemProp = pref + "item";

     try {

       configuration =

           PropertiesUtils.fromResource(clazz, pref + "properties");

     }

     catch (FileNotFoundException e) {

       System.err.println("Could not find properties file: " + e.toString());

       configuration = new Properties();

     }

     catch (IOException e) {

       throw new ShoppingConfigException(e.toString());

     }

   }

  /** 

   * Get a ShoppingTrolley Object as defined in the properties file. 

   * If no definition is found, a default DefaultShoppingTrolley 

   * will be returned.

   *

   * @return - a shopping trolley object as defined in the properties file 

   *

   * @throws InstantiationPropertyException if we cannot instantiate the object

   */

   public org.paneris.melati.shopping.ShoppingTrolley getShoppingTrolley() 

       throws InstantiationPropertyException {

     return (org.paneris.melati.shopping.ShoppingTrolley)

              PropertiesUtils.instanceOfNamedClass(

                  configuration, ShoppingTrolleyProp, 

                  "org.paneris.melati.shopping.ShoppingTrolley",

                  "org.paneris.melati.shopping.DefaultShoppingTrolley");

   }

  /** 

   * Get a ShoppingTrolleyItem Object as defined in the properties file. 

   * If no definition is found, a default DefaultShoppingTrolleyItem will be 

   * returned

   *

   * @return - a shopping trolley item object as defined in the properties file 

   *

   * @throws InstantiationPropertyException if we cannot instantiate the object

   */

   public org.paneris.melati.shopping.ShoppingTrolleyItem 

       getShoppingTrolleyItem()

       throws InstantiationPropertyException {

     return (org.paneris.melati.shopping.ShoppingTrolleyItem)

                PropertiesUtils.instanceOfNamedClass(

                configuration, ShoppingTrolleyItemProp, 

                "org.paneris.melati.shopping.ShoppingTrolleyItem",

                "org.paneris.melati.shopping.DefaultShoppingTrolleyItem");

   }

 }