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18 package org.apache.logging.log4j.core.tools;
19
20 import java.io.PrintStream;
21 import java.util.ArrayList;
22 import java.util.Arrays;
23 import java.util.List;
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46 public final class Generate {
47
48
49
50
51 static final String PACKAGE_DECLARATION = "package %s;%n%n";
52
53 static enum Type {
54 CUSTOM {
55 @Override
56 String imports() {
57 return ""
58 + "import java.io.Serializable;%n"
59 + "import org.apache.logging.log4j.Level;%n"
60 + "import org.apache.logging.log4j.LogManager;%n"
61 + "import org.apache.logging.log4j.Logger;%n"
62 + "import org.apache.logging.log4j.Marker;%n"
63 + "import org.apache.logging.log4j.message.Message;%n"
64 + "import org.apache.logging.log4j.message.MessageFactory;%n"
65 + "import org.apache.logging.log4j.spi.AbstractLogger;%n"
66 + "import org.apache.logging.log4j.spi.ExtendedLoggerWrapper;%n"
67 + "import org.apache.logging.log4j.util.MessageSupplier;%n"
68 + "import org.apache.logging.log4j.util.Supplier;%n"
69 + "%n";
70 }
71
72 @Override
73 String declaration() {
74 return ""
75 + "/**%n"
76 + " * Custom Logger interface with convenience methods for%n"
77 + " * %s%n"
78 + " * <p>Compatible with Log4j 2.6 or higher.</p>%n"
79 + " */%n"
80 + "public final class %s implements Serializable {%n"
81 + " private static final long serialVersionUID = " + System.nanoTime() + "L;%n"
82 + " private final ExtendedLoggerWrapper logger;%n"
83 + "%n";
84 }
85
86 @Override
87 String constructor() {
88 return ""
89 + "%n"
90 + " private %s(final Logger logger) {%n"
91 + " this.logger = new ExtendedLoggerWrapper((AbstractLogger) logger, logger.getName(), "
92 + "logger.getMessageFactory());%n"
93 + " }%n";
94 }
95
96 @Override
97 Class<?> generator() {
98 return CustomLogger.class;
99 }
100 },
101 EXTEND {
102 @Override
103 String imports() {
104 return ""
105 + "import org.apache.logging.log4j.Level;%n"
106 + "import org.apache.logging.log4j.LogManager;%n"
107 + "import org.apache.logging.log4j.Logger;%n"
108 + "import org.apache.logging.log4j.Marker;%n"
109 + "import org.apache.logging.log4j.message.Message;%n"
110 + "import org.apache.logging.log4j.message.MessageFactory;%n"
111 + "import org.apache.logging.log4j.spi.AbstractLogger;%n"
112 + "import org.apache.logging.log4j.spi.ExtendedLoggerWrapper;%n"
113 + "import org.apache.logging.log4j.util.MessageSupplier;%n"
114 + "import org.apache.logging.log4j.util.Supplier;%n"
115 + "%n";
116 }
117
118 @Override
119 String declaration() {
120 return ""
121 + "/**%n"
122 + " * Extended Logger interface with convenience methods for%n"
123 + " * %s%n"
124 + " * <p>Compatible with Log4j 2.6 or higher.</p>%n"
125 + " */%n"
126 + "public final class %s extends ExtendedLoggerWrapper {%n"
127 + " private static final long serialVersionUID = " + System.nanoTime() + "L;%n"
128 + " private final ExtendedLoggerWrapper logger;%n"
129 + "%n";
130 }
131
132 @Override
133 String constructor() {
134 return ""
135 + "%n"
136 + " private %s(final Logger logger) {%n"
137 + " super((AbstractLogger) logger, logger.getName(), logger.getMessageFactory());%n"
138 + " this.logger = this;%n"
139 + " }%n";
140 }
141
142 @Override
143 Class<?> generator() {
144 return ExtendedLogger.class;
145 }
146 };
147 abstract String imports();
148
149 abstract String declaration();
150
151 abstract String constructor();
152
153 abstract Class<?> generator();
154 }
155
156 static final String FQCN_FIELD = ""
157 + " private static final String FQCN = %s.class.getName();%n";
158
159 static final String LEVEL_FIELD = ""
160 + " private static final Level %s = Level.forName(\"%s\", %d);%n";
161
162 static final String FACTORY_METHODS = ""
163 + "%n"
164 + " /**%n"
165 + " * Returns a custom Logger with the name of the calling class.%n"
166 + " * %n"
167 + " * @return The custom Logger for the calling class.%n"
168 + " */%n"
169 + " public static CLASSNAME create() {%n"
170 + " final Logger wrapped = LogManager.getLogger();%n"
171 + " return new CLASSNAME(wrapped);%n"
172 + " }%n"
173 + "%n"
174 + " /**%n"
175 + " * Returns a custom Logger using the fully qualified name of the Class as%n"
176 + " * the Logger name.%n"
177 + " * %n"
178 + " * @param loggerName The Class whose name should be used as the Logger name.%n"
179 + " * If null it will default to the calling class.%n"
180 + " * @return The custom Logger.%n"
181 + " */%n"
182 + " public static CLASSNAME create(final Class<?> loggerName) {%n"
183 + " final Logger wrapped = LogManager.getLogger(loggerName);%n"
184 + " return new CLASSNAME(wrapped);%n"
185 + " }%n"
186 + "%n"
187 + " /**%n"
188 + " * Returns a custom Logger using the fully qualified name of the Class as%n"
189 + " * the Logger name.%n"
190 + " * %n"
191 + " * @param loggerName The Class whose name should be used as the Logger name.%n"
192 + " * If null it will default to the calling class.%n"
193 + " * @param messageFactory The message factory is used only when creating a%n"
194 + " * logger, subsequent use does not change the logger but will log%n"
195 + " * a warning if mismatched.%n"
196 + " * @return The custom Logger.%n"
197 + " */%n"
198 + " public static CLASSNAME create(final Class<?> loggerName, final MessageFactory"
199 + " messageFactory) {%n"
200 + " final Logger wrapped = LogManager.getLogger(loggerName, messageFactory);%n"
201 + " return new CLASSNAME(wrapped);%n"
202 + " }%n"
203 + "%n"
204 + " /**%n"
205 + " * Returns a custom Logger using the fully qualified class name of the value%n"
206 + " * as the Logger name.%n"
207 + " * %n"
208 + " * @param value The value whose class name should be used as the Logger%n"
209 + " * name. If null the name of the calling class will be used as%n"
210 + " * the logger name.%n"
211 + " * @return The custom Logger.%n"
212 + " */%n"
213 + " public static CLASSNAME create(final Object value) {%n"
214 + " final Logger wrapped = LogManager.getLogger(value);%n"
215 + " return new CLASSNAME(wrapped);%n"
216 + " }%n"
217 + "%n"
218 + " /**%n"
219 + " * Returns a custom Logger using the fully qualified class name of the value%n"
220 + " * as the Logger name.%n"
221 + " * %n"
222 + " * @param value The value whose class name should be used as the Logger%n"
223 + " * name. If null the name of the calling class will be used as%n"
224 + " * the logger name.%n"
225 + " * @param messageFactory The message factory is used only when creating a%n"
226 + " * logger, subsequent use does not change the logger but will log%n"
227 + " * a warning if mismatched.%n"
228 + " * @return The custom Logger.%n"
229 + " */%n"
230 + " public static CLASSNAME create(final Object value, final MessageFactory messageFactory) {%n"
231 + " final Logger wrapped = LogManager.getLogger(value, messageFactory);%n"
232 + " return new CLASSNAME(wrapped);%n"
233 + " }%n"
234 + "%n"
235 + " /**%n"
236 + " * Returns a custom Logger with the specified name.%n"
237 + " * %n"
238 + " * @param name The logger name. If null the name of the calling class will%n"
239 + " * be used.%n"
240 + " * @return The custom Logger.%n"
241 + " */%n"
242 + " public static CLASSNAME create(final String name) {%n"
243 + " final Logger wrapped = LogManager.getLogger(name);%n"
244 + " return new CLASSNAME(wrapped);%n"
245 + " }%n"
246 + "%n"
247 + " /**%n"
248 + " * Returns a custom Logger with the specified name.%n"
249 + " * %n"
250 + " * @param name The logger name. If null the name of the calling class will%n"
251 + " * be used.%n"
252 + " * @param messageFactory The message factory is used only when creating a%n"
253 + " * logger, subsequent use does not change the logger but will log%n"
254 + " * a warning if mismatched.%n"
255 + " * @return The custom Logger.%n"
256 + " */%n"
257 + " public static CLASSNAME create(final String name, final MessageFactory messageFactory) {%n"
258 + " final Logger wrapped = LogManager.getLogger(name, messageFactory);%n"
259 + " return new CLASSNAME(wrapped);%n"
260 + " }%n";
261
262 static final String METHODS = ""
263 + "%n"
264 + " /**%n"
265 + " * Logs a message with the specific Marker at the {@code CUSTOM_LEVEL} level.%n"
266 + " * %n"
267 + " * @param marker the marker data specific to this log statement%n"
268 + " * @param msg the message string to be logged%n"
269 + " */%n"
270 + " public void methodName(final Marker marker, final Message msg) {%n"
271 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msg, (Throwable) null);%n"
272 + " }%n"
273 + "%n"
274 + " /**%n"
275 + " * Logs a message with the specific Marker at the {@code CUSTOM_LEVEL} level.%n"
276 + " * %n"
277 + " * @param marker the marker data specific to this log statement%n"
278 + " * @param msg the message string to be logged%n"
279 + " * @param t A Throwable or null.%n"
280 + " */%n"
281 + " public void methodName(final Marker marker, final Message msg, final Throwable t) {%n"
282 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msg, t);%n"
283 + " }%n"
284 + "%n"
285 + " /**%n"
286 + " * Logs a message object with the {@code CUSTOM_LEVEL} level.%n"
287 + " * %n"
288 + " * @param marker the marker data specific to this log statement%n"
289 + " * @param message the message object to log.%n"
290 + " */%n"
291 + " public void methodName(final Marker marker, final Object message) {%n"
292 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, (Throwable) null);%n"
293 + " }%n"
294 + "%n"
295 + " /**%n"
296 + " * Logs a message CharSequence with the {@code CUSTOM_LEVEL} level.%n"
297 + " * %n"
298 + " * @param marker the marker data specific to this log statement%n"
299 + " * @param message the message CharSequence to log.%n"
300 + " * @since Log4j-2.6%n"
301 + " */%n"
302 + " public void methodName(final Marker marker, final CharSequence message) {%n"
303 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, (Throwable) null);%n"
304 + " }%n"
305 + "%n"
306 + " /**%n"
307 + " * Logs a message at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
308 + " * the {@link Throwable} {@code t} passed as parameter.%n"
309 + " * %n"
310 + " * @param marker the marker data specific to this log statement%n"
311 + " * @param message the message to log.%n"
312 + " * @param t the exception to log, including its stack trace.%n"
313 + " */%n"
314 + " public void methodName(final Marker marker, final Object message, final Throwable t) {%n"
315 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, t);%n"
316 + " }%n"
317 + "%n"
318 + " /**%n"
319 + " * Logs a message at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
320 + " * the {@link Throwable} {@code t} passed as parameter.%n"
321 + " * %n"
322 + " * @param marker the marker data specific to this log statement%n"
323 + " * @param message the CharSequence to log.%n"
324 + " * @param t the exception to log, including its stack trace.%n"
325 + " * @since Log4j-2.6%n"
326 + " */%n"
327 + " public void methodName(final Marker marker, final CharSequence message, final Throwable t) {%n"
328 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, t);%n"
329 + " }%n"
330 + "%n"
331 + " /**%n"
332 + " * Logs a message object with the {@code CUSTOM_LEVEL} level.%n"
333 + " * %n"
334 + " * @param marker the marker data specific to this log statement%n"
335 + " * @param message the message object to log.%n"
336 + " */%n"
337 + " public void methodName(final Marker marker, final String message) {%n"
338 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, (Throwable) null);%n"
339 + " }%n"
340 + "%n"
341 + " /**%n"
342 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
343 + " * %n"
344 + " * @param marker the marker data specific to this log statement%n"
345 + " * @param message the message to log; the format depends on the message factory.%n"
346 + " * @param params parameters to the message.%n"
347 + " * @see #getMessageFactory()%n"
348 + " */%n"
349 + " public void methodName(final Marker marker, final String message, final Object... params) {%n"
350 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, params);%n"
351 + " }%n"
352 + "%n"
353 + " /**%n"
354 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
355 + " * %n"
356 + " * @param marker the marker data specific to this log statement%n"
357 + " * @param message the message to log; the format depends on the message factory.%n"
358 + " * @param p0 parameter to the message.%n"
359 + " * @see #getMessageFactory()%n"
360 + " * @since Log4j-2.6%n"
361 + " */%n"
362 + " public void methodName(final Marker marker, final String message, final Object p0) {%n"
363 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0);%n"
364 + " }%n"
365 + "%n"
366 + " /**%n"
367 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
368 + " * %n"
369 + " * @param marker the marker data specific to this log statement%n"
370 + " * @param message the message to log; the format depends on the message factory.%n"
371 + " * @param p0 parameter to the message.%n"
372 + " * @param p1 parameter to the message.%n"
373 + " * @see #getMessageFactory()%n"
374 + " * @since Log4j-2.6%n"
375 + " */%n"
376 + " public void methodName(final Marker marker, final String message, final Object p0, "
377 + "final Object p1) {%n"
378 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1);%n"
379 + " }%n"
380 + "%n"
381 + " /**%n"
382 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
383 + " * %n"
384 + " * @param marker the marker data specific to this log statement%n"
385 + " * @param message the message to log; the format depends on the message factory.%n"
386 + " * @param p0 parameter to the message.%n"
387 + " * @param p1 parameter to the message.%n"
388 + " * @param p2 parameter to the message.%n"
389 + " * @see #getMessageFactory()%n"
390 + " * @since Log4j-2.6%n"
391 + " */%n"
392 + " public void methodName(final Marker marker, final String message, final Object p0, "
393 + "final Object p1, final Object p2) {%n"
394 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2);%n"
395 + " }%n"
396 + "%n"
397 + " /**%n"
398 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
399 + " * %n"
400 + " * @param marker the marker data specific to this log statement%n"
401 + " * @param message the message to log; the format depends on the message factory.%n"
402 + " * @param p0 parameter to the message.%n"
403 + " * @param p1 parameter to the message.%n"
404 + " * @param p2 parameter to the message.%n"
405 + " * @param p3 parameter to the message.%n"
406 + " * @see #getMessageFactory()%n"
407 + " * @since Log4j-2.6%n"
408 + " */%n"
409 + " public void methodName(final Marker marker, final String message, final Object p0, "
410 + "final Object p1, final Object p2,%n"
411 + " final Object p3) {%n"
412 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3);%n"
413 + " }%n"
414 + "%n"
415 + " /**%n"
416 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
417 + " * %n"
418 + " * @param marker the marker data specific to this log statement%n"
419 + " * @param message the message to log; the format depends on the message factory.%n"
420 + " * @param p0 parameter to the message.%n"
421 + " * @param p1 parameter to the message.%n"
422 + " * @param p2 parameter to the message.%n"
423 + " * @param p3 parameter to the message.%n"
424 + " * @param p4 parameter to the message.%n"
425 + " * @see #getMessageFactory()%n"
426 + " * @since Log4j-2.6%n"
427 + " */%n"
428 + " public void methodName(final Marker marker, final String message, final Object p0, "
429 + "final Object p1, final Object p2,%n"
430 + " final Object p3, final Object p4) {%n"
431 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4);%n"
432 + " }%n"
433 + "%n"
434 + " /**%n"
435 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
436 + " * %n"
437 + " * @param marker the marker data specific to this log statement%n"
438 + " * @param message the message to log; the format depends on the message factory.%n"
439 + " * @param p0 parameter to the message.%n"
440 + " * @param p1 parameter to the message.%n"
441 + " * @param p2 parameter to the message.%n"
442 + " * @param p3 parameter to the message.%n"
443 + " * @param p4 parameter to the message.%n"
444 + " * @param p5 parameter to the message.%n"
445 + " * @see #getMessageFactory()%n"
446 + " * @since Log4j-2.6%n"
447 + " */%n"
448 + " public void methodName(final Marker marker, final String message, final Object p0, "
449 + "final Object p1, final Object p2,%n"
450 + " final Object p3, final Object p4, final Object p5) {%n"
451 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4, p5);%n"
452 + " }%n"
453 + "%n"
454 + " /**%n"
455 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
456 + " * %n"
457 + " * @param marker the marker data specific to this log statement%n"
458 + " * @param message the message to log; the format depends on the message factory.%n"
459 + " * @param p0 parameter to the message.%n"
460 + " * @param p1 parameter to the message.%n"
461 + " * @param p2 parameter to the message.%n"
462 + " * @param p3 parameter to the message.%n"
463 + " * @param p4 parameter to the message.%n"
464 + " * @param p5 parameter to the message.%n"
465 + " * @param p6 parameter to the message.%n"
466 + " * @see #getMessageFactory()%n"
467 + " * @since Log4j-2.6%n"
468 + " */%n"
469 + " public void methodName(final Marker marker, final String message, final Object p0, "
470 + "final Object p1, final Object p2,%n"
471 + " final Object p3, final Object p4, final Object p5, final Object p6) {%n"
472 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4, p5, p6);%n"
473 + " }%n"
474 + "%n"
475 + " /**%n"
476 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
477 + " * %n"
478 + " * @param marker the marker data specific to this log statement%n"
479 + " * @param message the message to log; the format depends on the message factory.%n"
480 + " * @param p0 parameter to the message.%n"
481 + " * @param p1 parameter to the message.%n"
482 + " * @param p2 parameter to the message.%n"
483 + " * @param p3 parameter to the message.%n"
484 + " * @param p4 parameter to the message.%n"
485 + " * @param p5 parameter to the message.%n"
486 + " * @param p6 parameter to the message.%n"
487 + " * @param p7 parameter to the message.%n"
488 + " * @see #getMessageFactory()%n"
489 + " * @since Log4j-2.6%n"
490 + " */%n"
491 + " public void methodName(final Marker marker, final String message, final Object p0, "
492 + "final Object p1, final Object p2,%n"
493 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
494 + " final Object p7) {%n"
495 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4, p5, p6, p7);%n"
496 + " }%n"
497 + "%n"
498 + " /**%n"
499 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
500 + " * %n"
501 + " * @param marker the marker data specific to this log statement%n"
502 + " * @param message the message to log; the format depends on the message factory.%n"
503 + " * @param p0 parameter to the message.%n"
504 + " * @param p1 parameter to the message.%n"
505 + " * @param p2 parameter to the message.%n"
506 + " * @param p3 parameter to the message.%n"
507 + " * @param p4 parameter to the message.%n"
508 + " * @param p5 parameter to the message.%n"
509 + " * @param p6 parameter to the message.%n"
510 + " * @param p7 parameter to the message.%n"
511 + " * @param p8 parameter to the message.%n"
512 + " * @see #getMessageFactory()%n"
513 + " * @since Log4j-2.6%n"
514 + " */%n"
515 + " public void methodName(final Marker marker, final String message, final Object p0, "
516 + "final Object p1, final Object p2,%n"
517 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
518 + " final Object p7, final Object p8) {%n"
519 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4, p5, p6, p7, "
520 + "p8);%n"
521 + " }%n"
522 + "%n"
523 + " /**%n"
524 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
525 + " * %n"
526 + " * @param marker the marker data specific to this log statement%n"
527 + " * @param message the message to log; the format depends on the message factory.%n"
528 + " * @param p0 parameter to the message.%n"
529 + " * @param p1 parameter to the message.%n"
530 + " * @param p2 parameter to the message.%n"
531 + " * @param p3 parameter to the message.%n"
532 + " * @param p4 parameter to the message.%n"
533 + " * @param p5 parameter to the message.%n"
534 + " * @param p6 parameter to the message.%n"
535 + " * @param p7 parameter to the message.%n"
536 + " * @param p8 parameter to the message.%n"
537 + " * @param p9 parameter to the message.%n"
538 + " * @see #getMessageFactory()%n"
539 + " * @since Log4j-2.6%n"
540 + " */%n"
541 + " public void methodName(final Marker marker, final String message, final Object p0, "
542 + "final Object p1, final Object p2,%n"
543 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
544 + " final Object p7, final Object p8, final Object p9) {%n"
545 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, p0, p1, p2, p3, p4, p5, p6, p7, "
546 + "p8, p9);%n"
547 + " }%n"
548 + "%n"
549 + " /**%n"
550 + " * Logs a message at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
551 + " * the {@link Throwable} {@code t} passed as parameter.%n"
552 + " * %n"
553 + " * @param marker the marker data specific to this log statement%n"
554 + " * @param message the message to log.%n"
555 + " * @param t the exception to log, including its stack trace.%n"
556 + " */%n"
557 + " public void methodName(final Marker marker, final String message, final Throwable t) {%n"
558 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, t);%n"
559 + " }%n"
560 + "%n"
561 + " /**%n"
562 + " * Logs the specified Message at the {@code CUSTOM_LEVEL} level.%n"
563 + " * %n"
564 + " * @param msg the message string to be logged%n"
565 + " */%n"
566 + " public void methodName(final Message msg) {%n"
567 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msg, (Throwable) null);%n"
568 + " }%n"
569 + "%n"
570 + " /**%n"
571 + " * Logs the specified Message at the {@code CUSTOM_LEVEL} level.%n"
572 + " * %n"
573 + " * @param msg the message string to be logged%n"
574 + " * @param t A Throwable or null.%n"
575 + " */%n"
576 + " public void methodName(final Message msg, final Throwable t) {%n"
577 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msg, t);%n"
578 + " }%n"
579 + "%n"
580 + " /**%n"
581 + " * Logs a message object with the {@code CUSTOM_LEVEL} level.%n"
582 + " * %n"
583 + " * @param message the message object to log.%n"
584 + " */%n"
585 + " public void methodName(final Object message) {%n"
586 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, (Throwable) null);%n"
587 + " }%n"
588 + "%n"
589 + " /**%n"
590 + " * Logs a message at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
591 + " * the {@link Throwable} {@code t} passed as parameter.%n"
592 + " * %n"
593 + " * @param message the message to log.%n"
594 + " * @param t the exception to log, including its stack trace.%n"
595 + " */%n"
596 + " public void methodName(final Object message, final Throwable t) {%n"
597 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, t);%n"
598 + " }%n"
599 + "%n"
600 + " /**%n"
601 + " * Logs a message CharSequence with the {@code CUSTOM_LEVEL} level.%n"
602 + " * %n"
603 + " * @param message the message CharSequence to log.%n"
604 + " * @since Log4j-2.6%n"
605 + " */%n"
606 + " public void methodName(final CharSequence message) {%n"
607 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, (Throwable) null);%n"
608 + " }%n"
609 + "%n"
610 + " /**%n"
611 + " * Logs a CharSequence at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
612 + " * the {@link Throwable} {@code t} passed as parameter.%n"
613 + " * %n"
614 + " * @param message the CharSequence to log.%n"
615 + " * @param t the exception to log, including its stack trace.%n"
616 + " * @since Log4j-2.6%n"
617 + " */%n"
618 + " public void methodName(final CharSequence message, final Throwable t) {%n"
619 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, t);%n"
620 + " }%n"
621 + "%n"
622 + " /**%n"
623 + " * Logs a message object with the {@code CUSTOM_LEVEL} level.%n"
624 + " * %n"
625 + " * @param message the message object to log.%n"
626 + " */%n"
627 + " public void methodName(final String message) {%n"
628 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, (Throwable) null);%n"
629 + " }%n"
630 + "%n"
631 + " /**%n"
632 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
633 + " * %n"
634 + " * @param message the message to log; the format depends on the message factory.%n"
635 + " * @param params parameters to the message.%n"
636 + " * @see #getMessageFactory()%n"
637 + " */%n"
638 + " public void methodName(final String message, final Object... params) {%n"
639 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, params);%n"
640 + " }%n"
641 + "%n"
642 + " /**%n"
643 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
644 + " * %n"
645 + " * @param message the message to log; the format depends on the message factory.%n"
646 + " * @param p0 parameter to the message.%n"
647 + " * @see #getMessageFactory()%n"
648 + " * @since Log4j-2.6%n"
649 + " */%n"
650 + " public void methodName(final String message, final Object p0) {%n"
651 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0);%n"
652 + " }%n"
653 + "%n"
654 + " /**%n"
655 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
656 + " * %n"
657 + " * @param message the message to log; the format depends on the message factory.%n"
658 + " * @param p0 parameter to the message.%n"
659 + " * @param p1 parameter to the message.%n"
660 + " * @see #getMessageFactory()%n"
661 + " * @since Log4j-2.6%n"
662 + " */%n"
663 + " public void methodName(final String message, final Object p0, "
664 + "final Object p1) {%n"
665 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1);%n"
666 + " }%n"
667 + "%n"
668 + " /**%n"
669 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
670 + " * %n"
671 + " * @param message the message to log; the format depends on the message factory.%n"
672 + " * @param p0 parameter to the message.%n"
673 + " * @param p1 parameter to the message.%n"
674 + " * @param p2 parameter to the message.%n"
675 + " * @see #getMessageFactory()%n"
676 + " * @since Log4j-2.6%n"
677 + " */%n"
678 + " public void methodName(final String message, final Object p0, "
679 + "final Object p1, final Object p2) {%n"
680 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2);%n"
681 + " }%n"
682 + "%n"
683 + " /**%n"
684 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
685 + " * %n"
686 + " * @param message the message to log; the format depends on the message factory.%n"
687 + " * @param p0 parameter to the message.%n"
688 + " * @param p1 parameter to the message.%n"
689 + " * @param p2 parameter to the message.%n"
690 + " * @param p3 parameter to the message.%n"
691 + " * @see #getMessageFactory()%n"
692 + " * @since Log4j-2.6%n"
693 + " */%n"
694 + " public void methodName(final String message, final Object p0, "
695 + "final Object p1, final Object p2,%n"
696 + " final Object p3) {%n"
697 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3);%n"
698 + " }%n"
699 + "%n"
700 + " /**%n"
701 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
702 + " * %n"
703 + " * @param message the message to log; the format depends on the message factory.%n"
704 + " * @param p0 parameter to the message.%n"
705 + " * @param p1 parameter to the message.%n"
706 + " * @param p2 parameter to the message.%n"
707 + " * @param p3 parameter to the message.%n"
708 + " * @param p4 parameter to the message.%n"
709 + " * @see #getMessageFactory()%n"
710 + " * @since Log4j-2.6%n"
711 + " */%n"
712 + " public void methodName(final String message, final Object p0, "
713 + "final Object p1, final Object p2,%n"
714 + " final Object p3, final Object p4) {%n"
715 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4);%n"
716 + " }%n"
717 + "%n"
718 + " /**%n"
719 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
720 + " * %n"
721 + " * @param message the message to log; the format depends on the message factory.%n"
722 + " * @param p0 parameter to the message.%n"
723 + " * @param p1 parameter to the message.%n"
724 + " * @param p2 parameter to the message.%n"
725 + " * @param p3 parameter to the message.%n"
726 + " * @param p4 parameter to the message.%n"
727 + " * @param p5 parameter to the message.%n"
728 + " * @see #getMessageFactory()%n"
729 + " * @since Log4j-2.6%n"
730 + " */%n"
731 + " public void methodName(final String message, final Object p0, "
732 + "final Object p1, final Object p2,%n"
733 + " final Object p3, final Object p4, final Object p5) {%n"
734 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4, p5);%n"
735 + " }%n"
736 + "%n"
737 + " /**%n"
738 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
739 + " * %n"
740 + " * @param message the message to log; the format depends on the message factory.%n"
741 + " * @param p0 parameter to the message.%n"
742 + " * @param p1 parameter to the message.%n"
743 + " * @param p2 parameter to the message.%n"
744 + " * @param p3 parameter to the message.%n"
745 + " * @param p4 parameter to the message.%n"
746 + " * @param p5 parameter to the message.%n"
747 + " * @param p6 parameter to the message.%n"
748 + " * @see #getMessageFactory()%n"
749 + " * @since Log4j-2.6%n"
750 + " */%n"
751 + " public void methodName(final String message, final Object p0, "
752 + "final Object p1, final Object p2,%n"
753 + " final Object p3, final Object p4, final Object p5, final Object p6) {%n"
754 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4, p5, p6);%n"
755 + " }%n"
756 + "%n"
757 + " /**%n"
758 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
759 + " * %n"
760 + " * @param message the message to log; the format depends on the message factory.%n"
761 + " * @param p0 parameter to the message.%n"
762 + " * @param p1 parameter to the message.%n"
763 + " * @param p2 parameter to the message.%n"
764 + " * @param p3 parameter to the message.%n"
765 + " * @param p4 parameter to the message.%n"
766 + " * @param p5 parameter to the message.%n"
767 + " * @param p6 parameter to the message.%n"
768 + " * @param p7 parameter to the message.%n"
769 + " * @see #getMessageFactory()%n"
770 + " * @since Log4j-2.6%n"
771 + " */%n"
772 + " public void methodName(final String message, final Object p0, "
773 + "final Object p1, final Object p2,%n"
774 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
775 + " final Object p7) {%n"
776 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4, p5, p6, p7);%n"
777 + " }%n"
778 + "%n"
779 + " /**%n"
780 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
781 + " * %n"
782 + " * @param message the message to log; the format depends on the message factory.%n"
783 + " * @param p0 parameter to the message.%n"
784 + " * @param p1 parameter to the message.%n"
785 + " * @param p2 parameter to the message.%n"
786 + " * @param p3 parameter to the message.%n"
787 + " * @param p4 parameter to the message.%n"
788 + " * @param p5 parameter to the message.%n"
789 + " * @param p6 parameter to the message.%n"
790 + " * @param p7 parameter to the message.%n"
791 + " * @param p8 parameter to the message.%n"
792 + " * @see #getMessageFactory()%n"
793 + " * @since Log4j-2.6%n"
794 + " */%n"
795 + " public void methodName(final String message, final Object p0, "
796 + "final Object p1, final Object p2,%n"
797 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
798 + " final Object p7, final Object p8) {%n"
799 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4, p5, p6, p7, "
800 + "p8);%n"
801 + " }%n"
802 + "%n"
803 + " /**%n"
804 + " * Logs a message with parameters at the {@code CUSTOM_LEVEL} level.%n"
805 + " * %n"
806 + " * @param message the message to log; the format depends on the message factory.%n"
807 + " * @param p0 parameter to the message.%n"
808 + " * @param p1 parameter to the message.%n"
809 + " * @param p2 parameter to the message.%n"
810 + " * @param p3 parameter to the message.%n"
811 + " * @param p4 parameter to the message.%n"
812 + " * @param p5 parameter to the message.%n"
813 + " * @param p6 parameter to the message.%n"
814 + " * @param p7 parameter to the message.%n"
815 + " * @param p8 parameter to the message.%n"
816 + " * @param p9 parameter to the message.%n"
817 + " * @see #getMessageFactory()%n"
818 + " * @since Log4j-2.6%n"
819 + " */%n"
820 + " public void methodName(final String message, final Object p0, "
821 + "final Object p1, final Object p2,%n"
822 + " final Object p3, final Object p4, final Object p5, final Object p6,%n"
823 + " final Object p7, final Object p8, final Object p9) {%n"
824 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, p0, p1, p2, p3, p4, p5, p6, p7, "
825 + "p8, p9);%n"
826 + " }%n"
827 + "%n"
828 + " /**%n"
829 + " * Logs a message at the {@code CUSTOM_LEVEL} level including the stack trace of%n"
830 + " * the {@link Throwable} {@code t} passed as parameter.%n"
831 + " * %n"
832 + " * @param message the message to log.%n"
833 + " * @param t the exception to log, including its stack trace.%n"
834 + " */%n"
835 + " public void methodName(final String message, final Throwable t) {%n"
836 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, t);%n"
837 + " }%n"
838 + "%n"
839 + " /**%n"
840 + " * Logs a message which is only to be constructed if the logging level is the {@code CUSTOM_LEVEL}"
841 + "level.%n"
842 + " *%n"
843 + " * @param msgSupplier A function, which when called, produces the desired log message;%n"
844 + " * the format depends on the message factory.%n"
845 + " * @since Log4j-2.4%n"
846 + " */%n"
847 + " public void methodName(final Supplier<?> msgSupplier) {%n"
848 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msgSupplier, (Throwable) null);%n"
849 + " }%n"
850 + "%n"
851 + " /**%n"
852 + " * Logs a message (only to be constructed if the logging level is the {@code CUSTOM_LEVEL}%n"
853 + " * level) including the stack trace of the {@link Throwable} <code>t</code> passed as parameter.%n"
854 + " *%n"
855 + " * @param msgSupplier A function, which when called, produces the desired log message;%n"
856 + " * the format depends on the message factory.%n"
857 + " * @param t the exception to log, including its stack trace.%n"
858 + " * @since Log4j-2.4%n"
859 + " */%n"
860 + " public void methodName(final Supplier<?> msgSupplier, final Throwable t) {%n"
861 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msgSupplier, t);%n"
862 + " }%n"
863 + "%n"
864 + " /**%n"
865 + " * Logs a message which is only to be constructed if the logging level is the%n"
866 + " * {@code CUSTOM_LEVEL} level with the specified Marker.%n"
867 + " *%n"
868 + " * @param marker the marker data specific to this log statement%n"
869 + " * @param msgSupplier A function, which when called, produces the desired log message;%n"
870 + " * the format depends on the message factory.%n"
871 + " * @since Log4j-2.4%n"
872 + " */%n"
873 + " public void methodName(final Marker marker, final Supplier<?> msgSupplier) {%n"
874 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msgSupplier, (Throwable) null);%n"
875 + " }%n"
876 + "%n"
877 + " /**%n"
878 + " * Logs a message with parameters which are only to be constructed if the logging level is the%n"
879 + " * {@code CUSTOM_LEVEL} level.%n"
880 + " *%n"
881 + " * @param marker the marker data specific to this log statement%n"
882 + " * @param message the message to log; the format depends on the message factory.%n"
883 + " * @param paramSuppliers An array of functions, which when called, produce the desired log"
884 + " message parameters.%n"
885 + " * @since Log4j-2.4%n"
886 + " */%n"
887 + " public void methodName(final Marker marker, final String message, final Supplier<?>..."
888 + " paramSuppliers) {%n"
889 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, message, paramSuppliers);%n"
890 + " }%n"
891 + "%n"
892 + " /**%n"
893 + " * Logs a message (only to be constructed if the logging level is the {@code CUSTOM_LEVEL}%n"
894 + " * level) with the specified Marker and including the stack trace of the {@link Throwable}%n"
895 + " * <code>t</code> passed as parameter.%n"
896 + " *%n"
897 + " * @param marker the marker data specific to this log statement%n"
898 + " * @param msgSupplier A function, which when called, produces the desired log message;%n"
899 + " * the format depends on the message factory.%n"
900 + " * @param t A Throwable or null.%n"
901 + " * @since Log4j-2.4%n"
902 + " */%n"
903 + " public void methodName(final Marker marker, final Supplier<?> msgSupplier, final Throwable t) {%n"
904 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msgSupplier, t);%n"
905 + " }%n"
906 + "%n"
907 + " /**%n"
908 + " * Logs a message with parameters which are only to be constructed if the logging level is%n"
909 + " * the {@code CUSTOM_LEVEL} level.%n"
910 + " *%n"
911 + " * @param message the message to log; the format depends on the message factory.%n"
912 + " * @param paramSuppliers An array of functions, which when called, produce the desired log"
913 + " message parameters.%n"
914 + " * @since Log4j-2.4%n"
915 + " */%n"
916 + " public void methodName(final String message, final Supplier<?>... paramSuppliers) {%n"
917 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, message, paramSuppliers);%n"
918 + " }%n"
919 + "%n"
920 + " /**%n"
921 + " * Logs a message which is only to be constructed if the logging level is the%n"
922 + " * {@code CUSTOM_LEVEL} level with the specified Marker. The {@code MessageSupplier} may or may%n"
923 + " * not use the {@link MessageFactory} to construct the {@code Message}.%n"
924 + " *%n"
925 + " * @param marker the marker data specific to this log statement%n"
926 + " * @param msgSupplier A function, which when called, produces the desired log message.%n"
927 + " * @since Log4j-2.4%n"
928 + " */%n"
929 + " public void methodName(final Marker marker, final MessageSupplier msgSupplier) {%n"
930 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msgSupplier, (Throwable) null);%n"
931 + " }%n"
932 + "%n"
933 + " /**%n"
934 + " * Logs a message (only to be constructed if the logging level is the {@code CUSTOM_LEVEL}%n"
935 + " * level) with the specified Marker and including the stack trace of the {@link Throwable}%n"
936 + " * <code>t</code> passed as parameter. The {@code MessageSupplier} may or may not use the%n"
937 + " * {@link MessageFactory} to construct the {@code Message}.%n"
938 + " *%n"
939 + " * @param marker the marker data specific to this log statement%n"
940 + " * @param msgSupplier A function, which when called, produces the desired log message.%n"
941 + " * @param t A Throwable or null.%n"
942 + " * @since Log4j-2.4%n"
943 + " */%n"
944 + " public void methodName(final Marker marker, final MessageSupplier msgSupplier, final "
945 + "Throwable t) {%n"
946 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, marker, msgSupplier, t);%n"
947 + " }%n"
948 + "%n"
949 + " /**%n"
950 + " * Logs a message which is only to be constructed if the logging level is the%n"
951 + " * {@code CUSTOM_LEVEL} level. The {@code MessageSupplier} may or may not use the%n"
952 + " * {@link MessageFactory} to construct the {@code Message}.%n"
953 + " *%n"
954 + " * @param msgSupplier A function, which when called, produces the desired log message.%n"
955 + " * @since Log4j-2.4%n"
956 + " */%n"
957 + " public void methodName(final MessageSupplier msgSupplier) {%n"
958 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msgSupplier, (Throwable) null);%n"
959 + " }%n"
960 + "%n"
961 + " /**%n"
962 + " * Logs a message (only to be constructed if the logging level is the {@code CUSTOM_LEVEL}%n"
963 + " * level) including the stack trace of the {@link Throwable} <code>t</code> passed as parameter.%n"
964 + " * The {@code MessageSupplier} may or may not use the {@link MessageFactory} to construct the%n"
965 + " * {@code Message}.%n"
966 + " *%n"
967 + " * @param msgSupplier A function, which when called, produces the desired log message.%n"
968 + " * @param t the exception to log, including its stack trace.%n"
969 + " * @since Log4j-2.4%n"
970 + " */%n"
971 + " public void methodName(final MessageSupplier msgSupplier, final Throwable t) {%n"
972 + " logger.logIfEnabled(FQCN, CUSTOM_LEVEL, null, msgSupplier, t);%n"
973 + " }%n";
974
975 private Generate() {
976 }
977
978
979
980
981
982 public static final class CustomLogger {
983
984
985
986
987
988
989
990 public static void main(final String[] args) {
991 generate(args, Type.CUSTOM);
992 }
993
994 private CustomLogger() {
995 }
996 }
997
998
999
1000
1001
1002
1003 public static final class ExtendedLogger {
1004
1005
1006
1007
1008
1009
1010
1011 public static void main(final String[] args) {
1012 generate(args, Type.EXTEND);
1013 }
1014
1015 private ExtendedLogger() {
1016 }
1017 }
1018
1019 static class LevelInfo {
1020 final String name;
1021 final int intLevel;
1022
1023 LevelInfo(final String description) {
1024 final String[] parts = description.split("=");
1025 name = parts[0];
1026 intLevel = Integer.parseInt(parts[1]);
1027 }
1028
1029 public static List<LevelInfo> parse(final List<String> values, final Class<?> generator) {
1030 final List<LevelInfo> result = new ArrayList<>(values.size());
1031 for (int i = 0; i < values.size(); i++) {
1032 try {
1033 result.add(new LevelInfo(values.get(i)));
1034 } catch (final Exception ex) {
1035 System.err.println("Cannot parse custom level '" + values.get(i) + "': " + ex.toString());
1036 usage(System.err, generator);
1037 System.exit(-1);
1038 }
1039 }
1040 return result;
1041 }
1042 }
1043
1044 private static void generate(final String[] args, final Type type) {
1045 generate(args, type, System.out);
1046 }
1047
1048 static void generate(final String[] args, final Type type, final PrintStream printStream) {
1049 if (!validate(args)) {
1050 usage(printStream, type.generator());
1051 System.exit(-1);
1052 }
1053 final List<String> values = new ArrayList<>(Arrays.asList(args));
1054 final String classFQN = values.remove(0);
1055 final List<LevelInfo> levels = LevelInfo.parse(values, type.generator());
1056 printStream.println(generateSource(classFQN, levels, type));
1057 }
1058
1059 static boolean validate(final String[] args) {
1060 if (args.length < 2) {
1061 return false;
1062 }
1063 return true;
1064 }
1065
1066 private static void usage(final PrintStream out, final Class<?> generator) {
1067 out.println("Usage: java " + generator.getName() + " className LEVEL1=intLevel1 [LEVEL2=intLevel2...]");
1068 out.println(" Where className is the fully qualified class name of the custom/extended logger");
1069 out.println(" to generate, followed by a space-separated list of custom log levels.");
1070 out.println(" For each custom log level, specify NAME=intLevel (without spaces).");
1071 }
1072
1073 static String generateSource(final String classNameFQN, final List<LevelInfo> levels, final Type type) {
1074 final StringBuilder sb = new StringBuilder(10000 * levels.size());
1075 final int lastDot = classNameFQN.lastIndexOf('.');
1076 final String pkg = classNameFQN.substring(0, lastDot >= 0 ? lastDot : 0);
1077 if (!pkg.isEmpty()) {
1078 sb.append(String.format(PACKAGE_DECLARATION, pkg));
1079 }
1080 sb.append(String.format(type.imports(), ""));
1081 final String className = classNameFQN.substring(classNameFQN.lastIndexOf('.') + 1);
1082 final String javadocDescr = javadocDescription(levels);
1083 sb.append(String.format(type.declaration(), javadocDescr, className));
1084 sb.append(String.format(FQCN_FIELD, className));
1085 for (final LevelInfo level : levels) {
1086 sb.append(String.format(LEVEL_FIELD, level.name, level.name, level.intLevel));
1087 }
1088 sb.append(String.format(type.constructor(), className));
1089 sb.append(String.format(FACTORY_METHODS.replaceAll("CLASSNAME", className), ""));
1090 for (final LevelInfo level : levels) {
1091 final String methodName = camelCase(level.name);
1092 final String phase1 = METHODS.replaceAll("CUSTOM_LEVEL", level.name);
1093 final String phase2 = phase1.replaceAll("methodName", methodName);
1094 sb.append(String.format(phase2, ""));
1095 }
1096
1097 sb.append(String.format("}%n", ""));
1098 return sb.toString();
1099 }
1100
1101 static String javadocDescription(final List<LevelInfo> levels) {
1102 if (levels.size() == 1) {
1103 return "the " + levels.get(0).name + " custom log level.";
1104 }
1105 final StringBuilder sb = new StringBuilder(512);
1106 sb.append("the ");
1107 String sep = "";
1108 for (int i = 0; i < levels.size(); i++) {
1109 sb.append(sep);
1110 sb.append(levels.get(i).name);
1111 sep = (i == levels.size() - 2) ? " and " : ", ";
1112 }
1113 sb.append(" custom log levels.");
1114 return sb.toString();
1115 }
1116
1117 static String camelCase(final String customLevel) {
1118 final StringBuilder sb = new StringBuilder(customLevel.length());
1119 boolean lower = true;
1120 for (final char ch : customLevel.toCharArray()) {
1121 if (ch == '_') {
1122 lower = false;
1123 continue;
1124 }
1125 sb.append(lower ? Character.toLowerCase(ch) : Character.toUpperCase(ch));
1126 lower = true;
1127 }
1128 return sb.toString();
1129 }
1130 }