1 /* 2 * $Source: /usr/cvsroot/MelatiShopping/src/main/java/org/paneris/melati/shopping/DefaultShoppingTrolley.java,v $ 3 * $Revision: 1.12 $ 4 * 5 * Copyright (C) 2000 Tim Joyce 6 * 7 * Part of Melati (http://melati.org/ ), a framework for the rapid 8 * development of clean, maintainable web applications. 9 * 10 * Melati is free software; Permission is granted to copy, distribute 11 * and/or modify this software under the terms either: 12 * 13 * a) the GNU General Public License as published by the Free Software 14 * Foundation; either version 2 of the License, or (at your option) 15 * any later version, 16 * 17 * or 18 * 19 * b) any version of the Melati Software License, as published 20 * at http://melati.org 21 * 22 * You should have received a copy of the GNU General Public License and 23 * the Melati Software License along with this program; 24 * if not, write to the Free Software Foundation, Inc., 25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the 26 * GNU General Public License and visit http://melati.org to obtain the 27 * Melati Software License. 28 * 29 * Feel free to contact the Developers of Melati if you would like 30 * to work out a different arrangement than the options 31 * outlined here. It is our intention to allow Melati to be used by as 32 * wide an audience as possible. 33 * 34 * This program is distributed in the hope that it will be useful, 35 * but WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 37 * GNU General Public License for more details. 38 * 39 * Contact details for copyright holder: 40 * 41 * Tim Joyce <timj@paneris.org> 42 * http://paneris.org/~timj/ 43 * 68 Sandbanks Rd, Poole, Dorset. BH14 8BY. UK 44 */ 45 46 package org.paneris.melati.shopping; 47 48 import org.melati.Melati; 49 import java.util.Locale; 50 51 /** 52 * <p> A Shopping Trolley stores information in the user's Shopping Trolley.<p> 53 * <p> It does this by storing itself in the session.</p> 54 * <p> For this reason, the constructors are private, and you will be expected 55 * always to get the Shopping Trolley using getInstance();</p> 56 * 57 * usage example: 58 * 59 * ShoppingTrolley trolley = ShoppingTrolley.getInstance(Melati melati); 60 * context.put("trolley", trolley); 61 * 62 **/ 63 64 public class DefaultShoppingTrolley extends ShoppingTrolley { 65 66 /** 67 * Set the Locale for this trolley. 68 */ 69 public Locale getLocale(){ 70 return Locale.UK; 71 } 72 73 /** 74 * Load a trolley from something persistent. 75 */ 76 public void load(Integer id) { 77 } 78 79 /** 80 * Save a trolley to something persistent. 81 */ 82 public void save() { 83 } 84 85 /** 86 * Set the user's detault details into this trolley. 87 * This is useful if users have already logged in, 88 * and we don't want them to reenter their details. 89 */ 90 public void setDefaultDetails(Melati melati) { 91 } 92 93 /** 94 * Do something to force users to login. 95 * You should throw an access poem exception in order to 96 * generate the login page. 97 */ 98 public void assertLogin(Melati melatiIn) { 99 } 100 101 /** 102 * Provide a mechanism for working out if 103 * this order should include a delivery charge. 104 */ 105 public boolean hasDelivery(){ 106 return false; 107 } 108 109 /** 110 * You need to provide some mechanism for calculating the delivery 111 * value for the order (item delivery values are calculated individually. 112 */ 113 public double getDeliveryValue() { 114 return 0; 115 } 116 117 118 /** 119 * Provide a mechanism for working out if 120 * this order should include a discount. 121 */ 122 public boolean hasDiscount() { 123 return false; 124 } 125 126 /** 127 * If you want to apply a discount to this order, do it here. 128 */ 129 public double getDiscountRate() { 130 return 0; 131 } 132 133 /** 134 * Provide a mechanism for working out whether 135 * this order should include VAT (default should be true). 136 */ 137 public boolean hasVAT() { 138 return true; 139 } 140 141 /** 142 * A call back point for the payment server. 143 */ 144 public void confirmPayment(Melati melatiIn) { 145 } 146 147 } 148