1 /*
2 * $Source: /usr/cvsroot/MelatiShopping/src/main/java/org/paneris/melati/shopping/MelatiShoppingConfig.java,v $
3 * $Revision: 1.9 $
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 java.io.FileNotFoundException;
49 import java.io.IOException;
50 import java.util.Properties;
51
52 import org.melati.util.MelatiBugMelatiException;
53 import org.melati.util.PropertiesUtils;
54 import org.melati.util.InstantiationPropertyException;
55
56
57 /**
58 * The MelatiShoppingConfig provides configuration information for the Melati
59 * Shopping Interface.
60 */
61
62 public class MelatiShoppingConfig {
63
64 private Properties configuration = null;
65 private String ShoppingTrolleyProp = null;
66 private String ShoppingTrolleyItemProp = null;
67 private static Class clazz;
68 static {
69 try {
70 clazz = Class.forName("org.paneris.melati.shopping.ShoppingTrolley");
71 }
72 catch (ClassNotFoundException e) {
73 throw new MelatiBugMelatiException("Out of date Class.forName", e);
74 }
75 }
76
77 /**
78 * Construct a MelatiShoppingConfig object.
79 * If the propeties file is not found default properties will be used.
80 *
81 * @throws ShoppingConfigException - if there is an error loading the file
82 */
83 public MelatiShoppingConfig() throws ShoppingConfigException {
84
85 String pref = clazz.getName() + ".";
86 ShoppingTrolleyProp = pref + "trolley";
87 ShoppingTrolleyItemProp = pref + "item";
88
89 try {
90 configuration =
91 PropertiesUtils.fromResource(clazz, pref + "properties");
92 }
93 catch (FileNotFoundException e) {
94 System.err.println("Could not find properties file: " + e.toString());
95 configuration = new Properties();
96 }
97 catch (IOException e) {
98 throw new ShoppingConfigException(e.toString());
99 }
100
101 }
102
103 /**
104 * Get a ShoppingTrolley Object as defined in the properties file.
105 * If no definition is found, a default DefaultShoppingTrolley
106 * will be returned.
107 *
108 * @return - a shopping trolley object as defined in the properties file
109 *
110 * @throws InstantiationPropertyException if we cannot instantiate the object
111 */
112 public org.paneris.melati.shopping.ShoppingTrolley getShoppingTrolley()
113 throws InstantiationPropertyException {
114 return (org.paneris.melati.shopping.ShoppingTrolley)
115 PropertiesUtils.instanceOfNamedClass(
116 configuration, ShoppingTrolleyProp,
117 "org.paneris.melati.shopping.ShoppingTrolley",
118 "org.paneris.melati.shopping.DefaultShoppingTrolley");
119 }
120
121
122 /**
123 * Get a ShoppingTrolleyItem Object as defined in the properties file.
124 * If no definition is found, a default DefaultShoppingTrolleyItem will be
125 * returned
126 *
127 * @return - a shopping trolley item object as defined in the properties file
128 *
129 * @throws InstantiationPropertyException if we cannot instantiate the object
130 */
131 public org.paneris.melati.shopping.ShoppingTrolleyItem
132 getShoppingTrolleyItem()
133 throws InstantiationPropertyException {
134 return (org.paneris.melati.shopping.ShoppingTrolleyItem)
135 PropertiesUtils.instanceOfNamedClass(
136 configuration, ShoppingTrolleyItemProp,
137 "org.paneris.melati.shopping.ShoppingTrolleyItem",
138 "org.paneris.melati.shopping.DefaultShoppingTrolleyItem");
139 }
140
141 }