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1
6 package javax.jdo;
7
8 import java.security.AccessController  ;
9 import java.security.PrivilegedAction ;
10 import java.text.MessageFormat ;
11 import java.util.*;
12
13
16
17 public class I18NHelper {
18
19 private I18NHelper() {
20 bundle = null;
21 }
22
23 private I18NHelper(String bundleName, ClassLoader loader) {
24 bundle = null;
25 bundle = loadBundle(bundleName, loader);
26 }
27
28 public static I18NHelper getInstance(String bundleName) {
29 return getInstance(bundleName, (javax.jdo.I18NHelper.class)
30 .getClassLoader());
31 }
32
33 public static I18NHelper getInstance(final Class cls) {
34 ClassLoader classLoader = (ClassLoader ) AccessController
35 .doPrivileged(new PrivilegedAction () {
36
37 public Object run() {
38 return cls.getClassLoader();
39 }
40
41 });
42 String bundle = getPackageName(cls.getName()) + ".Bundle";
43 return getInstance(bundle, classLoader);
44 }
45
46 public static I18NHelper getInstance(String bundleName, ClassLoader loader) {
47 I18NHelper helper = (I18NHelper) helpers.get(bundleName);
48 if (helper != null) {
49 return helper;
50 } else {
51 helper = new I18NHelper(bundleName, loader);
52 helpers.put(bundleName, helper);
53 return (I18NHelper) helpers.get(bundleName);
54 }
55 }
56
57 public String msg(String messageKey) {
58 return getMessage(bundle, messageKey);
59 }
60
61 public String msg(String messageKey, Object arg1) {
62 return getMessage(bundle, messageKey, arg1);
63 }
64
65 public String msg(String messageKey, Object arg1, Object arg2) {
66 return getMessage(bundle, messageKey, arg1, arg2);
67 }
68
69 public String msg(String messageKey, Object arg1, Object arg2, Object arg3) {
70 return getMessage(bundle, messageKey, arg1, arg2, arg3);
71 }
72
73 public String msg(String messageKey, Object args[]) {
74 return getMessage(bundle, messageKey, args);
75 }
76
77 public String msg(String messageKey, int arg) {
78 return getMessage(bundle, messageKey, arg);
79 }
80
81 public String msg(String messageKey, boolean arg) {
82 return getMessage(bundle, messageKey, arg);
83 }
84
85 private static final ResourceBundle loadBundle(String bundleName,
86 ClassLoader loader) {
87 ResourceBundle messages = (ResourceBundle) bundles.get(bundleName);
88 if (messages == null) {
89 messages = ResourceBundle.getBundle(bundleName, locale, loader);
90 bundles.put(bundleName, messages);
91 }
92 return messages;
93 }
94
95 private static final String getMessage(ResourceBundle messages,
96 String messageKey) {
97 return messages.getString(messageKey);
98 }
99
100 private static final String getMessage(ResourceBundle messages,
101 String messageKey, Object msgArgs[]) {
102 for (int i = 0; i < msgArgs.length; i++)
103 if (msgArgs[i] == null)
104 msgArgs[i] = "";
105
106 MessageFormat formatter = new MessageFormat (messages
107 .getString(messageKey));
108 return formatter.format(((Object ) (msgArgs)));
109 }
110
111 private static final String getMessage(ResourceBundle messages,
112 String messageKey, Object arg) {
113 Object args[] = { arg };
114 return getMessage(messages, messageKey, args);
115 }
116
117 private static final String getMessage(ResourceBundle messages,
118 String messageKey, Object arg1, Object arg2) {
119 Object args[] = { arg1, arg2 };
120 return getMessage(messages, messageKey, args);
121 }
122
123 private static final String getMessage(ResourceBundle messages,
124 String messageKey, Object arg1, Object arg2, Object arg3) {
125 Object args[] = { arg1, arg2, arg3 };
126 return getMessage(messages, messageKey, args);
127 }
128
129 private static final String getMessage(ResourceBundle messages,
130 String messageKey, int arg) {
131 Object args[] = { new Integer (arg) };
132 return getMessage(messages, messageKey, args);
133 }
134
135 private static final String getMessage(ResourceBundle messages,
136 String messageKey, boolean arg) {
137 Object args[] = { String.valueOf(arg) };
138 return getMessage(messages, messageKey, args);
139 }
140
141 private static final String getPackageName(String className) {
142 int index = className.lastIndexOf('.');
143 return index == -1 ? "" : className.substring(0, index);
144 }
145
146 private static Hashtable bundles = new Hashtable();
147
148 private static Hashtable helpers = new Hashtable();
149
150 private static Locale locale = Locale.getDefault();
151
152 private ResourceBundle bundle;
153
154 private static final String bundleSuffix = ".Bundle";
155
156 } |
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