1 /*
2 * Copyright 2007-2013 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.exceptions.i18n;
17
18 import java.util.Locale;
19
20 import org.apache.commons.lang.StringUtils;
21
22 import de.smartics.exceptions.AbstractCoreRuntimeException;
23 import de.smartics.exceptions.core.Code;
24 import de.smartics.exceptions.i18n.message.LocalizedInfo;
25 import de.smartics.exceptions.i18n.message.MessageType;
26 import de.smartics.exceptions.i18n.message.Messages;
27
28 /**
29 * The base implementation of exceptions that support internationalization for
30 * unchecked exceptions.
31 */
32 public abstract class AbstractLocalizedRuntimeException extends
33 AbstractCoreRuntimeException implements LocalizedException
34 {
35 // ********************************* Fields *********************************
36
37 // --- constants ------------------------------------------------------------
38
39 /**
40 * The class version identifier.
41 * <p>
42 * The value of this constant is {@value}.
43 * </p>
44 */
45 private static final long serialVersionUID = 1L;
46
47 // ... resource key .........................................................
48
49 // --- members --------------------------------------------------------------
50
51 /**
52 * The localized information controls the localization information.
53 *
54 * @serial
55 */
56 protected final LocalizedInfo localizedInfo;
57
58 // ****************************** Initializer *******************************
59
60 // ****************************** Constructors ******************************
61
62 /**
63 * Constructor.
64 *
65 * @param code the error or exception code of the exception.
66 * @see #AbstractLocalizedRuntimeException(Throwable,Code)
67 */
68 protected AbstractLocalizedRuntimeException(final Code code)
69 {
70 this(null, code);
71 }
72
73 /**
74 * Constructor.
75 *
76 * @param code the error or exception code of the exception.
77 * @param bundleBaseName the fully qualified name of the bundle to use.
78 * @see #AbstractLocalizedRuntimeException(Throwable,Code,String)
79 */
80 protected AbstractLocalizedRuntimeException(final Code code,
81 final String bundleBaseName)
82 {
83 this(null, code, bundleBaseName);
84 }
85
86 /**
87 * Constructor.
88 *
89 * @param cause the cause (which is saved for later retrieval by the
90 * {@link #getCause()} method). (A <tt>null</tt> value is permitted,
91 * and indicates that the cause is nonexistent or unknown.)
92 * @param code the error or exception code of the exception.
93 * @see #AbstractLocalizedRuntimeException(Throwable,Code,String)
94 */
95 protected AbstractLocalizedRuntimeException(final Throwable cause,
96 final Code code)
97 {
98 this(cause, code, null);
99 }
100
101 /**
102 * Constructor.
103 *
104 * @param cause the cause (which is saved for later retrieval by the
105 * {@link #getCause()} method). (A <tt>null</tt> value is permitted,
106 * and indicates that the cause is nonexistent or unknown.)
107 * @param code the error or exception code of the exception.
108 * @param bundleBaseName the fully qualified name of the bundle to use.
109 * @see #AbstractLocalizedRuntimeException(Throwable,Code,String,String)
110 */
111 protected AbstractLocalizedRuntimeException(final Throwable cause,
112 final Code code, final String bundleBaseName)
113 {
114 this(cause, code, bundleBaseName, null);
115 }
116
117 /**
118 * Constructor.
119 *
120 * @param cause the cause (which is saved for later retrieval by the
121 * {@link #getCause()} method). (A <tt>null</tt> value is permitted,
122 * and indicates that the cause is nonexistent or unknown.)
123 * @param code the error or exception code of the exception.
124 * @param bundleBaseName the fully qualified name of the bundle to use.
125 * @param resourceKey the localization key to fetch messages from message
126 * bundles.
127 * @see AbstractCoreRuntimeException#AbstractCoreRuntimeException(String,
128 * Throwable, Code)
129 */
130 protected AbstractLocalizedRuntimeException(final Throwable cause,
131 final Code code, final String bundleBaseName, final String resourceKey)
132 {
133 super(null, cause, code);
134 this.localizedInfo =
135 new LocalizedInfo(code, cause, bundleBaseName, resourceKey);
136 }
137
138 // ****************************** Inner Classes *****************************
139
140 // ********************************* Methods ********************************
141
142 // --- init -----------------------------------------------------------------
143
144 // --- get&set --------------------------------------------------------------
145
146 /**
147 * Returns the localization key to fetch messages from message bundles. If
148 * this value is not set, the {@link String} representation of the
149 * {@link #getCode()} instance is used.
150 *
151 * @return the localization key to fetch messages from message bundles.
152 */
153 public final String getResourceKey()
154 {
155 return localizedInfo.getResourceKey();
156 }
157
158 /**
159 * Returns the fully qualified base name of the bundle to use.
160 *
161 * @return the fully qualified base name of the bundle to use.
162 */
163 public final String getBundleBaseName()
164 {
165 return localizedInfo.getBundleBaseName();
166 }
167
168 // --- business -------------------------------------------------------------
169
170 // ... get message ..........................................................
171
172 /**
173 * Returns the message for the given message type and the system's default
174 * locale.
175 *
176 * @param messageType the type if message to return.
177 * @return the message for the given message type.
178 */
179 @Override
180 public final String getMessage(final MessageType messageType)
181 {
182 final Locale locale = Locale.getDefault();
183 return getMessage(locale, messageType);
184 }
185
186 /**
187 * {@inheritDoc}
188 * <p>
189 * Returns the localized message for the default locale.
190 *
191 * @see java.lang.Throwable#getMessage()
192 */
193 @Override
194 public final String getMessage()
195 {
196 return getLocalizedMessage();
197 }
198
199 /**
200 * Returns the message for the given message type.
201 *
202 * @param locale the locale to select the localized message.
203 * @param messageType the type if message to return.
204 * @return the message for the given message type.
205 */
206 public final String getMessage(final Locale locale,
207 final MessageType messageType)
208 {
209 final String resourceKey = localizedInfo.getResourceKey();
210 return getLocalizedMessage(resourceKey, locale, messageType, null); // ,
211 // null
212 // );
213 }
214
215 // ... throwable standard message
216
217 /**
218 * Returns the localized message according to the system's default locale.
219 * <p>
220 * {@inheritDoc}
221 */
222 @Override
223 public final String getLocalizedMessage()
224 {
225 return getLocalizedMessage(Locale.getDefault());
226 }
227
228 /**
229 * Returns the localized message for the given locale.
230 *
231 * @param locale the locale for which the message is requested.
232 * @return returns the localized message of this exception.
233 */
234 public final String getLocalizedMessage(final Locale locale)
235 {
236 return getLocalizedMessage(locale, null); // , null);
237 }
238
239 /**
240 * Returns the localized message for the given locale.
241 *
242 * @param locale the locale for which the message is requested.
243 * @param loader the loader to read the message bundle.
244 * @return returns the localized message of this exception.
245 */
246 public final String getLocalizedMessage(final Locale locale,
247 final ClassLoader loader)
248 {
249 final String keyPrefix = getCode().getCode();
250 return getLocalizedMessage(keyPrefix, locale, MessageType.SUMMARY, loader);
251 }
252
253 // /**
254 // * Returns the localized message for the given locale.
255 // *
256 // * @param locale the locale for which the message is requested.
257 // * @param control the controller to load the resource bundle.
258 // * @return returns the localized message of this exception.
259 // * @todo Should we really provide these methods with class loader and
260 // control?
261 // * What is the user scenario for this?
262 // */
263 // public String getLocalizedMessage(
264 // final Locale locale,
265 // final ResourceBundle.Control control)
266 // {
267 // return getLocalizedMessage(locale, null, control);
268 // }
269
270 // /**
271 // * Returns the localized message for the given locale.
272 // *
273 // * @param locale the locale for which the message is requested.
274 // * @param loader the loader to read the message bundle.
275 // * @param control the controller to load the resource bundle.
276 // * @return returns the localized message of this exception.
277 // */
278 // public String getLocalizedMessage(
279 // final Locale locale,
280 // final ClassLoader loader,
281 // final ResourceBundle.Control control)
282 // {
283 // final String message = messageBean.getLocalizedMessage(this, locale,
284 // loader, control);
285 // return message;
286 // }
287
288 // ... fetcher for all messages
289
290 /**
291 * Returns the localized message for the given locale.
292 *
293 * @param keyPrefix the prefix of the key to load from the bundle.
294 * @param locale the locale for which the message is requested.
295 * @param messageType the type of message to localize.
296 * @param loader the loader to read the message bundle.
297 * @return returns the localized message of this exception.
298 * @todo Should we really provide these methods with class loader and control?
299 * What is the user scenario for this?
300 */
301 public final String getLocalizedMessage(final String keyPrefix,
302 final Locale locale, final MessageType messageType,
303 final ClassLoader loader) // ,
304 // final ResourceBundle.Control control)
305 {
306 final String message =
307 localizedInfo.getLocalizedMessage(this, keyPrefix, locale, messageType,
308 loader); // , control);
309 return message;
310 }
311
312 @Override
313 public final String getMessages()
314 {
315 return getMessages(Locale.getDefault());
316 }
317
318 @Override
319 public final String getMessages(final Locale locale)
320 {
321 final StringBuilder buffer = new StringBuilder();
322 for (MessageType type : MessageType.values())
323 {
324 buffer.append(type.name()).append('=').append(getMessage(locale, type))
325 .append(' ');
326 }
327 return StringUtils.chop(buffer.toString());
328 }
329
330 @Override
331 public final Messages createMessages()
332 {
333 return createMessages(Locale.getDefault());
334 }
335
336 @Override
337 public final Messages createMessages(final Locale locale)
338 {
339 final Messages.Builder builder = new Messages.Builder();
340 final String keyPrefix = getCode().getCode();
341 for (MessageType type : MessageType.values())
342 {
343 builder.put(type, localizedInfo.createLocalizedMessage(this, keyPrefix,
344 locale, type, null));
345 }
346
347 return builder.build();
348 }
349
350 @Override
351 public final CauseTrailMessages getCauseTrail()
352 {
353 return getCauseTrail(Locale.getDefault());
354 }
355
356 @Override
357 public final CauseTrailMessages getCauseTrail(final Locale locale)
358 {
359 return localizedInfo.getCauseTrail(locale);
360 }
361
362 // --- object basics --------------------------------------------------------
363
364 /**
365 * Returns the string representation of the exception.
366 * <p>
367 * May be overridden by subclasses in an application (not a library) to change
368 * the string representation. Usually an implementation of
369 * {@code I18nCodeMessageFormatter} should be set to the
370 * {@link de.smartics.exceptions.core.ExceptionContext}.
371 * </p>
372 *
373 * @return the string representation of the object.
374 */
375 @Override
376 public String toString()
377 {
378 final I18nCodeMessageFormatter formatter =
379 I18nExceptionContextManager.getFormatter(Thread.currentThread()
380 .getContextClassLoader());
381 final String string = formatter.format(this);
382 return string;
383 }
384 }