1 /*
2 * Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.main;
27
28 import java.io.FileWriter;
29 import java.io.PrintWriter;
30 import java.lang.module.ModuleDescriptor;
31 import java.nio.file.Files;
32 import java.nio.file.Path;
33 import java.nio.file.Paths;
34 import java.text.Collator;
35 import java.util.Arrays;
36 import java.util.Collections;
37 import java.util.Comparator;
38 import java.util.EnumSet;
39 import java.util.Iterator;
40 import java.util.LinkedHashSet;
41 import java.util.Locale;
42 import java.util.ServiceLoader;
43 import java.util.Set;
44 import java.util.TreeSet;
45 import java.util.regex.Pattern;
46 import java.util.stream.Collectors;
47 import java.util.stream.StreamSupport;
48
49 import javax.lang.model.SourceVersion;
50
51 import jdk.internal.misc.VM;
52
53 import com.sun.tools.doclint.DocLint;
54 import com.sun.tools.javac.code.Lint;
55 import com.sun.tools.javac.code.Lint.LintCategory;
56 import com.sun.tools.javac.code.Source;
57 import com.sun.tools.javac.code.Type;
58 import com.sun.tools.javac.jvm.Profile;
59 import com.sun.tools.javac.jvm.Target;
60 import com.sun.tools.javac.platform.PlatformProvider;
61 import com.sun.tools.javac.processing.JavacProcessingEnvironment;
62 import com.sun.tools.javac.util.Assert;
63 import com.sun.tools.javac.util.Log;
64 import com.sun.tools.javac.util.Log.PrefixKind;
65 import com.sun.tools.javac.util.Log.WriterKind;
66 import com.sun.tools.javac.util.Options;
67 import com.sun.tools.javac.util.StringUtils;
68
69 import static com.sun.tools.javac.main.Option.ChoiceKind.*;
70 import static com.sun.tools.javac.main.Option.OptionGroup.*;
71 import static com.sun.tools.javac.main.Option.OptionKind.*;
72
73 /**
74 * Options for javac.
75 * The specific Option to handle a command-line option can be found by calling
76 * {@link #lookup}, which search some or all of the members of this enum in order,
77 * looking for the first {@link #matches match}.
78 * The action for an Option is performed {@link #handleOption}, which determines
79 * whether an argument is needed and where to find it;
80 * {@code handleOption} then calls {@link #process process} providing a suitable
81 * {@link OptionHelper} to provide access the compiler state.
82 *
83 * <p><b>This is NOT part of any supported API.
84 * If you write code that depends on this, you do so at your own
85 * risk. This code and its internal interfaces are subject to change
86 * or deletion without notice.</b></p>
87 */
88 public enum Option {
89 G("-g", "opt.g", STANDARD, BASIC),
90
91 G_NONE("-g:none", "opt.g.none", STANDARD, BASIC) {
92 @Override
93 public void process(OptionHelper helper, String option) {
94 helper.put("-g:", "none");
95 }
96 },
97
98 G_CUSTOM("-g:", "opt.g.lines.vars.source",
99 STANDARD, BASIC, ANYOF, "lines", "vars", "source"),
100
101 XLINT("-Xlint", "opt.Xlint", EXTENDED, BASIC),
102
103 XLINT_CUSTOM("-Xlint:", "opt.arg.Xlint", "opt.Xlint.custom", EXTENDED, BASIC, ANYOF, getXLintChoices()) {
104 private final String LINT_KEY_FORMAT = LARGE_INDENT + " %-" +
105 (DEFAULT_SYNOPSIS_WIDTH + SMALL_INDENT.length() - LARGE_INDENT.length() - 2) + "s %s";
106 @Override
107 protected void help(Log log) {
108 super.help(log);
109 log.printRawLines(WriterKind.STDOUT,
110 String.format(LINT_KEY_FORMAT,
111 "all",
112 log.localize(PrefixKind.JAVAC, "opt.Xlint.all")));
113 for (LintCategory lc : LintCategory.values()) {
114 log.printRawLines(WriterKind.STDOUT,
115 String.format(LINT_KEY_FORMAT,
116 lc.option,
117 log.localize(PrefixKind.JAVAC,
118 "opt.Xlint.desc." + lc.option)));
119 }
120 log.printRawLines(WriterKind.STDOUT,
121 String.format(LINT_KEY_FORMAT,
122 "none",
123 log.localize(PrefixKind.JAVAC, "opt.Xlint.none")));
124 }
125 },
126
127 XDOCLINT("-Xdoclint", "opt.Xdoclint", EXTENDED, BASIC),
128
129 XDOCLINT_CUSTOM("-Xdoclint:", "opt.Xdoclint.subopts", "opt.Xdoclint.custom", EXTENDED, BASIC) {
130 @Override
131 public boolean matches(String option) {
132 return DocLint.isValidOption(
133 option.replace(XDOCLINT_CUSTOM.primaryName, DocLint.XMSGS_CUSTOM_PREFIX));
134 }
135
136 @Override
137 public void process(OptionHelper helper, String option, String arg) {
138 String prev = helper.get(XDOCLINT_CUSTOM);
139 String next = (prev == null) ? arg : (prev + " " + arg);
140 helper.put(XDOCLINT_CUSTOM.primaryName, next);
141 }
142 },
143
144 XDOCLINT_PACKAGE("-Xdoclint/package:", "opt.Xdoclint.package.args", "opt.Xdoclint.package.desc", EXTENDED, BASIC) {
145 @Override
146 public boolean matches(String option) {
147 return DocLint.isValidOption(
148 option.replace(XDOCLINT_PACKAGE.primaryName, DocLint.XCHECK_PACKAGE));
149 }
150
151 @Override
152 public void process(OptionHelper helper, String option, String arg) {
153 String prev = helper.get(XDOCLINT_PACKAGE);
154 String next = (prev == null) ? arg : (prev + "," + arg);
155 helper.put(XDOCLINT_PACKAGE.primaryName, next);
156 }
157 },
158
159 DOCLINT_FORMAT("--doclint-format", "opt.doclint.format", EXTENDED, BASIC, ONEOF, "html4", "html5"),
160
161 // -nowarn is retained for command-line backward compatibility
162 NOWARN("-nowarn", "opt.nowarn", STANDARD, BASIC) {
163 @Override
164 public void process(OptionHelper helper, String option) {
165 helper.put("-Xlint:none", option);
166 }
167 },
168
169 VERBOSE("-verbose", "opt.verbose", STANDARD, BASIC),
170
171 // -deprecation is retained for command-line backward compatibility
172 DEPRECATION("-deprecation", "opt.deprecation", STANDARD, BASIC) {
173 @Override
174 public void process(OptionHelper helper, String option) {
175 helper.put("-Xlint:deprecation", option);
176 }
177 },
178
179 CLASS_PATH("--class-path -classpath -cp", "opt.arg.path", "opt.classpath", STANDARD, FILEMANAGER),
180
181 SOURCE_PATH("--source-path -sourcepath", "opt.arg.path", "opt.sourcepath", STANDARD, FILEMANAGER),
182
183 MODULE_SOURCE_PATH("--module-source-path", "opt.arg.mspath", "opt.modulesourcepath", STANDARD, FILEMANAGER),
184
185 MODULE_PATH("--module-path -p", "opt.arg.path", "opt.modulepath", STANDARD, FILEMANAGER),
186
187 UPGRADE_MODULE_PATH("--upgrade-module-path", "opt.arg.path", "opt.upgrademodulepath", STANDARD, FILEMANAGER),
188
189 SYSTEM("--system", "opt.arg.jdk", "opt.system", STANDARD, FILEMANAGER),
190
191 PATCH_MODULE("--patch-module", "opt.arg.patch", "opt.patch", EXTENDED, FILEMANAGER) {
192 // The deferred filemanager diagnostics mechanism assumes a single value per option,
193 // but --patch-module can be used multiple times, once per module. Therefore we compose
194 // a value for the option containing the last value specified for each module, and separate
195 // the the module=path pairs by an invalid path character, NULL.
196 // The standard file manager code knows to split apart the NULL-separated components.
197 @Override
198 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
199 if (arg.isEmpty()) {
200 throw helper.newInvalidValueException("err.no.value.for.option", option);
201 } else if (getPattern().matcher(arg).matches()) {
202 String prev = helper.get(PATCH_MODULE);
203 if (prev == null) {
204 super.process(helper, option, arg);
205 } else {
206 String argModulePackage = arg.substring(0, arg.indexOf('='));
207 boolean isRepeated = Arrays.stream(prev.split("\0"))
208 .map(s -> s.substring(0, s.indexOf('=')))
209 .collect(Collectors.toSet())
210 .contains(argModulePackage);
211 if (isRepeated) {
212 throw helper.newInvalidValueException("err.repeated.value.for.patch.module", argModulePackage);
213 } else {
214 super.process(helper, option, prev + '\0' + arg);
215 }
216 }
217 } else {
218 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
219 }
220 }
221
222 @Override
223 public Pattern getPattern() {
224 return Pattern.compile("([^/]+)=(,*[^,].*)");
225 }
226 },
227
228 BOOT_CLASS_PATH("--boot-class-path -bootclasspath", "opt.arg.path", "opt.bootclasspath", STANDARD, FILEMANAGER) {
229 @Override
230 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
231 helper.remove("-Xbootclasspath/p:");
232 helper.remove("-Xbootclasspath/a:");
233 super.process(helper, option, arg);
234 }
235 },
236
237 XBOOTCLASSPATH_PREPEND("-Xbootclasspath/p:", "opt.arg.path", "opt.Xbootclasspath.p", EXTENDED, FILEMANAGER),
238
239 XBOOTCLASSPATH_APPEND("-Xbootclasspath/a:", "opt.arg.path", "opt.Xbootclasspath.a", EXTENDED, FILEMANAGER),
240
241 XBOOTCLASSPATH("-Xbootclasspath:", "opt.arg.path", "opt.bootclasspath", EXTENDED, FILEMANAGER) {
242 @Override
243 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
244 helper.remove("-Xbootclasspath/p:");
245 helper.remove("-Xbootclasspath/a:");
246 super.process(helper, "-bootclasspath", arg);
247 }
248 },
249
250 EXTDIRS("-extdirs", "opt.arg.dirs", "opt.extdirs", STANDARD, FILEMANAGER),
251
252 DJAVA_EXT_DIRS("-Djava.ext.dirs=", "opt.arg.dirs", "opt.extdirs", EXTENDED, FILEMANAGER) {
253 @Override
254 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
255 EXTDIRS.process(helper, "-extdirs", arg);
256 }
257 },
258
259 ENDORSEDDIRS("-endorseddirs", "opt.arg.dirs", "opt.endorseddirs", STANDARD, FILEMANAGER),
260
261 DJAVA_ENDORSED_DIRS("-Djava.endorsed.dirs=", "opt.arg.dirs", "opt.endorseddirs", EXTENDED, FILEMANAGER) {
262 @Override
263 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
264 ENDORSEDDIRS.process(helper, "-endorseddirs", arg);
265 }
266 },
267
268 PROC("-proc:", "opt.proc.none.only", STANDARD, BASIC, ONEOF, "none", "only"),
269
270 PROCESSOR("-processor", "opt.arg.class.list", "opt.processor", STANDARD, BASIC),
271
272 PROCESSOR_PATH("--processor-path -processorpath", "opt.arg.path", "opt.processorpath", STANDARD, FILEMANAGER),
273
274 PROCESSOR_MODULE_PATH("--processor-module-path", "opt.arg.path", "opt.processormodulepath", STANDARD, FILEMANAGER),
275
276 PARAMETERS("-parameters","opt.parameters", STANDARD, BASIC),
277
278 D("-d", "opt.arg.directory", "opt.d", STANDARD, FILEMANAGER),
279
280 S("-s", "opt.arg.directory", "opt.sourceDest", STANDARD, FILEMANAGER),
281
282 H("-h", "opt.arg.directory", "opt.headerDest", STANDARD, FILEMANAGER),
283
284 IMPLICIT("-implicit:", "opt.implicit", STANDARD, BASIC, ONEOF, "none", "class"),
285
286 ENCODING("-encoding", "opt.arg.encoding", "opt.encoding", STANDARD, FILEMANAGER),
287
288 SOURCE("-source", "opt.arg.release", "opt.source", STANDARD, BASIC) {
289 @Override
290 public void process(OptionHelper helper, String option, String operand) throws InvalidValueException {
291 Source source = Source.lookup(operand);
292 if (source == null) {
293 throw helper.newInvalidValueException("err.invalid.source", operand);
294 }
295 super.process(helper, option, operand);
296 }
297 },
298
299 TARGET("-target", "opt.arg.release", "opt.target", STANDARD, BASIC) {
300 @Override
301 public void process(OptionHelper helper, String option, String operand) throws InvalidValueException {
302 Target target = Target.lookup(operand);
303 if (target == null) {
304 throw helper.newInvalidValueException("err.invalid.target", operand);
305 }
306 super.process(helper, option, operand);
307 }
308 },
309
310 RELEASE("--release", "opt.arg.release", "opt.release", STANDARD, BASIC) {
311 @Override
312 protected void help(Log log) {
313 Iterable<PlatformProvider> providers =
314 ServiceLoader.load(PlatformProvider.class, Arguments.class.getClassLoader());
315 Set<String> platforms = StreamSupport.stream(providers.spliterator(), false)
316 .flatMap(provider -> StreamSupport.stream(provider.getSupportedPlatformNames()
317 .spliterator(),
318 false))
319 .collect(Collectors.toCollection(TreeSet :: new));
320
321 StringBuilder targets = new StringBuilder();
322 String delim = "";
323 for (String platform : platforms) {
324 targets.append(delim);
325 targets.append(platform);
326 delim = ", ";
327 }
328
329 super.help(log, log.localize(PrefixKind.JAVAC, descrKey, targets.toString()));
330 }
331 },
332
333 PROFILE("-profile", "opt.arg.profile", "opt.profile", STANDARD, BASIC) {
334 @Override
335 public void process(OptionHelper helper, String option, String operand) throws InvalidValueException {
336 Profile profile = Profile.lookup(operand);
337 if (profile == null) {
338 throw helper.newInvalidValueException("err.invalid.profile", operand);
339 }
340 super.process(helper, option, operand);
341 }
342 },
343
344 VERSION("--version -version", "opt.version", STANDARD, INFO) {
345 @Override
346 public void process(OptionHelper helper, String option) throws InvalidValueException {
347 Log log = helper.getLog();
348 String ownName = helper.getOwnName();
349 log.printLines(WriterKind.STDOUT, PrefixKind.JAVAC, "version", ownName, JavaCompiler.version());
350 super.process(helper, option);
351 }
352 },
353
354 FULLVERSION("--full-version -fullversion", null, HIDDEN, INFO) {
355 @Override
356 public void process(OptionHelper helper, String option) throws InvalidValueException {
357 Log log = helper.getLog();
358 String ownName = helper.getOwnName();
359 log.printLines(WriterKind.STDOUT, PrefixKind.JAVAC, "fullVersion", ownName, JavaCompiler.fullVersion());
360 super.process(helper, option);
361 }
362 },
363
364 // Note: -h is already taken for "native header output directory".
365 HELP("--help -help -?", "opt.help", STANDARD, INFO) {
366 @Override
367 public void process(OptionHelper helper, String option) throws InvalidValueException {
368 Log log = helper.getLog();
369 String ownName = helper.getOwnName();
370 log.printLines(WriterKind.STDOUT, PrefixKind.JAVAC, "msg.usage.header", ownName);
371 showHelp(log, OptionKind.STANDARD);
372 log.printNewline(WriterKind.STDOUT);
373 super.process(helper, option);
374 }
375 },
376
377 A("-A", "opt.arg.key.equals.value", "opt.A", STANDARD, BASIC, ArgKind.ADJACENT) {
378 @Override
379 public boolean matches(String arg) {
380 return arg.startsWith("-A");
381 }
382
383 @Override
384 public boolean hasArg() {
385 return false;
386 }
387 // Mapping for processor options created in
388 // JavacProcessingEnvironment
389 @Override
390 public void process(OptionHelper helper, String option) throws InvalidValueException {
391 int argLength = option.length();
392 if (argLength == 2) {
393 throw helper.newInvalidValueException("err.empty.A.argument");
394 }
395 int sepIndex = option.indexOf('=');
396 String key = option.substring(2, (sepIndex != -1 ? sepIndex : argLength) );
397 if (!JavacProcessingEnvironment.isValidOptionName(key)) {
398 throw helper.newInvalidValueException("err.invalid.A.key", option);
399 }
400 helper.put(option, option);
401 }
402 },
403
404 DEFAULT_MODULE_FOR_CREATED_FILES("--default-module-for-created-files",
405 "opt.arg.default.module.for.created.files",
406 "opt.default.module.for.created.files", EXTENDED, BASIC) {
407 @Override
408 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
409 String prev = helper.get(DEFAULT_MODULE_FOR_CREATED_FILES);
410 if (prev != null) {
411 throw helper.newInvalidValueException("err.option.too.many",
412 DEFAULT_MODULE_FOR_CREATED_FILES.primaryName);
413 } else if (arg.isEmpty()) {
414 throw helper.newInvalidValueException("err.no.value.for.option", option);
415 } else if (getPattern().matcher(arg).matches()) {
416 helper.put(DEFAULT_MODULE_FOR_CREATED_FILES.primaryName, arg);
417 } else {
418 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
419 }
420 }
421
422 @Override
423 public Pattern getPattern() {
424 return Pattern.compile("[^,].*");
425 }
426 },
427
428 X("--help-extra -X", "opt.X", STANDARD, INFO) {
429 @Override
430 public void process(OptionHelper helper, String option) throws InvalidValueException {
431 Log log = helper.getLog();
432 showHelp(log, OptionKind.EXTENDED);
433 log.printNewline(WriterKind.STDOUT);
434 log.printLines(WriterKind.STDOUT, PrefixKind.JAVAC, "msg.usage.nonstandard.footer");
435 super.process(helper, option);
436 }
437 },
438
439 // This option exists only for the purpose of documenting itself.
440 // It's actually implemented by the launcher.
441 J("-J", "opt.arg.flag", "opt.J", STANDARD, INFO, ArgKind.ADJACENT) {
442 @Override
443 public void process(OptionHelper helper, String option) {
444 throw new AssertionError("the -J flag should be caught by the launcher.");
445 }
446 },
447
448 MOREINFO("-moreinfo", null, HIDDEN, BASIC) {
449 @Override
450 public void process(OptionHelper helper, String option) throws InvalidValueException {
451 Type.moreInfo = true;
452 super.process(helper, option);
453 }
454 },
455
456 // treat warnings as errors
457 WERROR("-Werror", "opt.Werror", STANDARD, BASIC),
458
459 // prompt after each error
460 // new Option("-prompt", "opt.prompt"),
461 PROMPT("-prompt", null, HIDDEN, BASIC),
462
463 // dump stack on error
464 DOE("-doe", null, HIDDEN, BASIC),
465
466 // output source after type erasure
467 PRINTSOURCE("-printsource", null, HIDDEN, BASIC),
468
469 // display warnings for generic unchecked operations
470 WARNUNCHECKED("-warnunchecked", null, HIDDEN, BASIC) {
471 @Override
472 public void process(OptionHelper helper, String option) {
473 helper.put("-Xlint:unchecked", option);
474 }
475 },
476
477 XMAXERRS("-Xmaxerrs", "opt.arg.number", "opt.maxerrs", EXTENDED, BASIC),
478
479 XMAXWARNS("-Xmaxwarns", "opt.arg.number", "opt.maxwarns", EXTENDED, BASIC),
480
481 XSTDOUT("-Xstdout", "opt.arg.file", "opt.Xstdout", EXTENDED, INFO) {
482 @Override
483 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
484 try {
485 Log log = helper.getLog();
486 log.setWriters(new PrintWriter(new FileWriter(arg), true));
487 } catch (java.io.IOException e) {
488 throw helper.newInvalidValueException("err.error.writing.file", arg, e);
489 }
490 super.process(helper, option, arg);
491 }
492 },
493
494 XPRINT("-Xprint", "opt.print", EXTENDED, BASIC),
495
496 XPRINTROUNDS("-XprintRounds", "opt.printRounds", EXTENDED, BASIC),
497
498 XPRINTPROCESSORINFO("-XprintProcessorInfo", "opt.printProcessorInfo", EXTENDED, BASIC),
499
500 XPREFER("-Xprefer:", "opt.prefer", EXTENDED, BASIC, ONEOF, "source", "newer"),
501
502 XXUSERPATHSFIRST("-XXuserPathsFirst", "opt.userpathsfirst", HIDDEN, BASIC),
503
504 // see enum PkgInfo
505 XPKGINFO("-Xpkginfo:", "opt.pkginfo", EXTENDED, BASIC, ONEOF, "always", "legacy", "nonempty"),
506
507 /* -O is a no-op, accepted for backward compatibility. */
508 O("-O", null, HIDDEN, BASIC),
509
510 /* -Xjcov produces tables to support the code coverage tool jcov. */
511 XJCOV("-Xjcov", null, HIDDEN, BASIC),
512
513 PLUGIN("-Xplugin:", "opt.arg.plugin", "opt.plugin", EXTENDED, BASIC) {
514 @Override
515 public void process(OptionHelper helper, String option, String p) {
516 String prev = helper.get(PLUGIN);
517 helper.put(PLUGIN.primaryName, (prev == null) ? p : prev + '\0' + p);
518 }
519 },
520
521 XDIAGS("-Xdiags:", "opt.diags", EXTENDED, BASIC, ONEOF, "compact", "verbose"),
522
523 DEBUG("--debug:", null, HIDDEN, BASIC) {
524 @Override
525 public void process(OptionHelper helper, String option) throws InvalidValueException {
526 HiddenGroup.DEBUG.process(helper, option);
527 }
528 },
529
530 SHOULDSTOP("--should-stop:", null, HIDDEN, BASIC) {
531 @Override
532 public void process(OptionHelper helper, String option) throws InvalidValueException {
533 HiddenGroup.SHOULDSTOP.process(helper, option);
534 }
535 },
536
537 DIAGS("--diags:", null, HIDDEN, BASIC) {
538 @Override
539 public void process(OptionHelper helper, String option) throws InvalidValueException {
540 HiddenGroup.DIAGS.process(helper, option);
541 }
542 },
543
544 /* This is a back door to the compiler's option table.
545 * -XDx=y sets the option x to the value y.
546 * -XDx sets the option x to the value x.
547 */
548 XD("-XD", null, HIDDEN, BASIC) {
549 @Override
550 public boolean matches(String s) {
551 return s.startsWith(primaryName);
552 }
553 @Override
554 public void process(OptionHelper helper, String option) {
555 process(helper, option, option.substring(primaryName.length()));
556 }
557
558 @Override
559 public void process(OptionHelper helper, String option, String arg) {
560 int eq = arg.indexOf('=');
561 String key = (eq < 0) ? arg : arg.substring(0, eq);
562 String value = (eq < 0) ? arg : arg.substring(eq+1);
563 helper.put(key, value);
564 }
565 },
566
567 ADD_EXPORTS("--add-exports", "opt.arg.addExports", "opt.addExports", EXTENDED, BASIC) {
568 @Override
569 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
570 if (arg.isEmpty()) {
571 throw helper.newInvalidValueException("err.no.value.for.option", option);
572 } else if (getPattern().matcher(arg).matches()) {
573 String prev = helper.get(ADD_EXPORTS);
574 helper.put(ADD_EXPORTS.primaryName, (prev == null) ? arg : prev + '\0' + arg);
575 } else {
576 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
577 }
578 }
579
580 @Override
581 public Pattern getPattern() {
582 return Pattern.compile("([^/]+)/([^=]+)=(,*[^,].*)");
583 }
584 },
585
586 ADD_OPENS("--add-opens", null, null, HIDDEN, BASIC),
587
588 ADD_READS("--add-reads", "opt.arg.addReads", "opt.addReads", EXTENDED, BASIC) {
589 @Override
590 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
591 if (arg.isEmpty()) {
592 throw helper.newInvalidValueException("err.no.value.for.option", option);
593 } else if (getPattern().matcher(arg).matches()) {
594 String prev = helper.get(ADD_READS);
595 helper.put(ADD_READS.primaryName, (prev == null) ? arg : prev + '\0' + arg);
596 } else {
597 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
598 }
599 }
600
601 @Override
602 public Pattern getPattern() {
603 return Pattern.compile("([^=]+)=(,*[^,].*)");
604 }
605 },
606
607 MODULE("--module -m", "opt.arg.m", "opt.m", STANDARD, BASIC),
608
609 ADD_MODULES("--add-modules", "opt.arg.addmods", "opt.addmods", STANDARD, BASIC) {
610 @Override
611 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
612 if (arg.isEmpty()) {
613 throw helper.newInvalidValueException("err.no.value.for.option", option);
614 } else if (getPattern().matcher(arg).matches()) {
615 String prev = helper.get(ADD_MODULES);
616 // since the individual values are simple names, we can simply join the
617 // values of multiple --add-modules options with ','
618 helper.put(ADD_MODULES.primaryName, (prev == null) ? arg : prev + ',' + arg);
619 } else {
620 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
621 }
622 }
623
624 @Override
625 public Pattern getPattern() {
626 return Pattern.compile(",*[^,].*");
627 }
628 },
629
630 LIMIT_MODULES("--limit-modules", "opt.arg.limitmods", "opt.limitmods", STANDARD, BASIC) {
631 @Override
632 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
633 if (arg.isEmpty()) {
634 throw helper.newInvalidValueException("err.no.value.for.option", option);
635 } else if (getPattern().matcher(arg).matches()) {
636 helper.put(LIMIT_MODULES.primaryName, arg); // last one wins
637 } else {
638 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
639 }
640 }
641
642 @Override
643 public Pattern getPattern() {
644 return Pattern.compile(",*[^,].*");
645 }
646 },
647
648 MODULE_VERSION("--module-version", "opt.arg.module.version", "opt.module.version", STANDARD, BASIC) {
649 @Override
650 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
651 if (arg.isEmpty()) {
652 throw helper.newInvalidValueException("err.no.value.for.option", option);
653 } else {
654 // use official parser if available
655 try {
656 ModuleDescriptor.Version.parse(arg);
657 } catch (IllegalArgumentException e) {
658 throw helper.newInvalidValueException("err.bad.value.for.option", option, arg);
659 }
660 }
661 super.process(helper, option, arg);
662 }
663 },
664
665 // This option exists only for the purpose of documenting itself.
666 // It's actually implemented by the CommandLine class.
667 AT("@", "opt.arg.file", "opt.AT", STANDARD, INFO, ArgKind.ADJACENT) {
668 @Override
669 public void process(OptionHelper helper, String option) {
670 throw new AssertionError("the @ flag should be caught by CommandLine.");
671 }
672 },
673
674 // Standalone positional argument: source file or type name.
675 SOURCEFILE("sourcefile", null, HIDDEN, INFO) {
676 @Override
677 public boolean matches(String s) {
678 if (s.endsWith(".java")) // Java source file
679 return true;
680 int sep = s.indexOf('/');
681 if (sep != -1) {
682 return SourceVersion.isName(s.substring(0, sep))
683 && SourceVersion.isName(s.substring(sep + 1));
684 } else {
685 return SourceVersion.isName(s); // Legal type name
686 }
687 }
688 @Override
689 public void process(OptionHelper helper, String option) throws InvalidValueException {
690 if (option.endsWith(".java") ) {
691 Path p = Paths.get(option);
692 if (!Files.exists(p)) {
693 throw helper.newInvalidValueException("err.file.not.found", p);
694 }
695 if (!Files.isRegularFile(p)) {
696 throw helper.newInvalidValueException("err.file.not.file", p);
697 }
698 helper.addFile(p);
699 } else {
700 helper.addClassName(option);
701 }
702 }
703 },
704
705 MULTIRELEASE("--multi-release", "opt.arg.multi-release", "opt.multi-release", HIDDEN, FILEMANAGER),
706
707 INHERIT_RUNTIME_ENVIRONMENT("--inherit-runtime-environment", "opt.inherit_runtime_environment",
708 HIDDEN, BASIC) {
709 @Override
710 public void process(OptionHelper helper, String option) throws InvalidValueException {
711 String[] runtimeArgs = VM.getRuntimeArguments();
712 for (String arg : runtimeArgs) {
713 // Handle any supported runtime options; ignore all others.
714 // The runtime arguments always use the single token form, e.g. "--name=value".
715 for (Option o : getSupportedRuntimeOptions()) {
716 if (o.matches(arg)) {
717 switch (o) {
718 case ADD_MODULES:
719 int eq = arg.indexOf('=');
720 Assert.check(eq > 0, () -> ("invalid runtime option:" + arg));
721 // --add-modules=ALL-DEFAULT is not supported at compile-time
722 // so remove it from list, and only process the rest
723 // if the set is non-empty.
724 // Note that --add-modules=ALL-DEFAULT is automatically added
725 // by the standard javac launcher.
726 String mods = Arrays.stream(arg.substring(eq + 1).split(","))
727 .filter(s -> !s.isEmpty() && !s.equals("ALL-DEFAULT"))
728 .collect(Collectors.joining(","));
729 if (!mods.isEmpty()) {
730 String updatedArg = arg.substring(0, eq + 1) + mods;
731 o.handleOption(helper, updatedArg, Collections.emptyIterator());
732 }
733 break;
734 default:
735 o.handleOption(helper, arg, Collections.emptyIterator());
736 break;
737 }
738 break;
739 }
740 }
741 }
742 }
743
744 private Option[] getSupportedRuntimeOptions() {
745 Option[] supportedRuntimeOptions = {
746 ADD_EXPORTS,
747 ADD_MODULES,
748 LIMIT_MODULES,
749 MODULE_PATH,
750 UPGRADE_MODULE_PATH,
751 PATCH_MODULE
752 };
753 return supportedRuntimeOptions;
754 }
755 };
756
757 /**
758 * This exception is thrown when an invalid value is given for an option.
759 * The detail string gives a detailed, localized message, suitable for use
760 * in error messages reported to the user.
761 */
762 public static class InvalidValueException extends Exception {
763 private static final long serialVersionUID = -1;
764
765 public InvalidValueException(String msg) {
766 super(msg);
767 }
768
769 public InvalidValueException(String msg, Throwable cause) {
770 super(msg, cause);
771 }
772 }
773
774 /**
775 * The kind of argument, if any, accepted by this option. The kind is augmented
776 * by characters in the name of the option.
777 */
778 public enum ArgKind {
779 /** This option does not take any argument. */
780 NONE,
781
782 // Not currently supported
783 // /**
784 // * This option takes an optional argument, which may be provided directly after an '='
785 // * separator, or in the following argument position if that word does not itself appear
786 // * to be the name of an option.
787 // */
788 // OPTIONAL,
789
790 /**
791 * This option takes an argument.
792 * If the name of option ends with ':' or '=', the argument must be provided directly
793 * after that separator.
794 * Otherwise, it may appear after an '=' or in the following argument position.
795 */
796 REQUIRED,
797
798 /**
799 * This option takes an argument immediately after the option name, with no separator
800 * character.
801 */
802 ADJACENT
803 }
804
805 /**
806 * The kind of an Option. This is used by the -help and -X options.
807 */
808 public enum OptionKind {
809 /** A standard option, documented by -help. */
810 STANDARD,
811 /** An extended option, documented by -X. */
812 EXTENDED,
813 /** A hidden option, not documented. */
814 HIDDEN,
815 }
816
817 /**
818 * The group for an Option. This determines the situations in which the
819 * option is applicable.
820 */
821 enum OptionGroup {
822 /** A basic option, available for use on the command line or via the
823 * Compiler API. */
824 BASIC,
825 /** An option for javac's standard JavaFileManager. Other file managers
826 * may or may not support these options. */
827 FILEMANAGER,
828 /** A command-line option that requests information, such as -help. */
829 INFO,
830 /** A command-line "option" representing a file or class name. */
831 OPERAND
832 }
833
834 /**
835 * The kind of choice for "choice" options.
836 */
837 enum ChoiceKind {
838 /** The expected value is exactly one of the set of choices. */
839 ONEOF,
840 /** The expected value is one of more of the set of choices. */
841 ANYOF
842 }
843
844 enum HiddenGroup {
845 DIAGS("diags"),
846 DEBUG("debug"),
847 SHOULDSTOP("should-stop");
848
849 static final Set<String> skipSet = new java.util.HashSet<>(
850 Arrays.asList("--diags:", "--debug:", "--should-stop:"));
851
852 final String text;
853
854 HiddenGroup(String text) {
855 this.text = text;
856 }
857
858 public void process(OptionHelper helper, String option) throws InvalidValueException {
859 String p = option.substring(option.indexOf(':') + 1).trim();
860 String[] subOptions = p.split(";");
861 for (String subOption : subOptions) {
862 subOption = text + "." + subOption.trim();
863 XD.process(helper, subOption, subOption);
864 }
865 }
866
867 static boolean skip(String name) {
868 return skipSet.contains(name);
869 }
870 }
871
872 /**
873 * The "primary name" for this option.
874 * This is the name that is used to put values in the {@link Options} table.
875 */
876 public final String primaryName;
877
878 /**
879 * The set of names (primary name and aliases) for this option.
880 * Note that some names may end in a separator, to indicate that an argument must immediately
881 * follow the separator (and cannot appear in the following argument position.
882 */
883 public final String[] names;
884
885 /** Documentation key for arguments. */
886 protected final String argsNameKey;
887
888 /** Documentation key for description.
889 */
890 protected final String descrKey;
891
892 /** The kind of this option. */
893 private final OptionKind kind;
894
895 /** The group for this option. */
896 private final OptionGroup group;
897
898 /** The kind of argument for this option. */
899 private final ArgKind argKind;
900
901 /** The kind of choices for this option, if any. */
902 private final ChoiceKind choiceKind;
903
904 /** The choices for this option, if any. */
905 private final Set<String> choices;
906
907 /**
908 * Looks up the first option matching the given argument in the full set of options.
909 * @param arg the argument to be matches
910 * @return the first option that matches, or null if none.
911 */
912 public static Option lookup(String arg) {
913 return lookup(arg, EnumSet.allOf(Option.class));
914 }
915
916 /**
917 * Looks up the first option matching the given argument within a set of options.
918 * @param arg the argument to be matched
919 * @param options the set of possible options
920 * @return the first option that matches, or null if none.
921 */
922 public static Option lookup(String arg, Set<Option> options) {
923 for (Option option: options) {
924 if (option.matches(arg))
925 return option;
926 }
927 return null;
928 }
929
930 /**
931 * Writes the "command line help" for given kind of option to the log.
932 * @param log the log
933 * @param kind the kind of options to select
934 */
935 private static void showHelp(Log log, OptionKind kind) {
936 Comparator<Option> comp = new Comparator<Option>() {
937 final Collator collator = Collator.getInstance(Locale.US);
938 { collator.setStrength(Collator.PRIMARY); }
939
940 @Override
941 public int compare(Option o1, Option o2) {
942 return collator.compare(o1.primaryName, o2.primaryName);
943 }
944 };
945
946 getJavaCompilerOptions()
947 .stream()
948 .filter(o -> o.kind == kind)
949 .sorted(comp)
950 .forEach(o -> {
951 o.help(log);
952 });
953 }
954
955 Option(String text, String descrKey,
956 OptionKind kind, OptionGroup group) {
957 this(text, null, descrKey, kind, group, null, null, ArgKind.NONE);
958 }
959
960 Option(String text, String argsNameKey, String descrKey,
961 OptionKind kind, OptionGroup group) {
962 this(text, argsNameKey, descrKey, kind, group, null, null, ArgKind.REQUIRED);
963 }
964
965 Option(String text, String argsNameKey, String descrKey,
966 OptionKind kind, OptionGroup group, ArgKind ak) {
967 this(text, argsNameKey, descrKey, kind, group, null, null, ak);
968 }
969
970 Option(String text, String argsNameKey, String descrKey, OptionKind kind, OptionGroup group,
971 ChoiceKind choiceKind, Set<String> choices) {
972 this(text, argsNameKey, descrKey, kind, group, choiceKind, choices, ArgKind.REQUIRED);
973 }
974
975 Option(String text, String descrKey,
976 OptionKind kind, OptionGroup group,
977 ChoiceKind choiceKind, String... choices) {
978 this(text, null, descrKey, kind, group, choiceKind,
979 new LinkedHashSet<>(Arrays.asList(choices)), ArgKind.REQUIRED);
980 }
981
982 private Option(String text, String argsNameKey, String descrKey,
983 OptionKind kind, OptionGroup group,
984 ChoiceKind choiceKind, Set<String> choices,
985 ArgKind argKind) {
986 this.names = text.trim().split("\\s+");
987 Assert.check(names.length >= 1);
988 this.primaryName = names[0];
989 this.argsNameKey = argsNameKey;
990 this.descrKey = descrKey;
991 this.kind = kind;
992 this.group = group;
993 this.choiceKind = choiceKind;
994 this.choices = choices;
995 this.argKind = argKind;
996 }
997
998 public String getPrimaryName() {
999 return primaryName;
1000 }
1001
1002 public OptionKind getKind() {
1003 return kind;
1004 }
1005
1006 public ArgKind getArgKind() {
1007 return argKind;
1008 }
1009
1010 public boolean hasArg() {
1011 return (argKind != ArgKind.NONE);
1012 }
1013
1014 public boolean hasSeparateArg() {
1015 return getArgKind() == ArgKind.REQUIRED &&
1016 !primaryName.endsWith(":") && !primaryName.endsWith("=");
1017 }
1018
1019 public boolean matches(String option) {
1020 for (String name: names) {
1021 if (matches(option, name))
1022 return true;
1023 }
1024 return false;
1025 }
1026
1027 private boolean matches(String option, String name) {
1028 if (name.startsWith("--") && !HiddenGroup.skip(name)) {
1029 return option.equals(name)
1030 || hasArg() && option.startsWith(name + "=");
1031 }
1032
1033 boolean hasSuffix = (argKind == ArgKind.ADJACENT)
1034 || name.endsWith(":") || name.endsWith("=");
1035
1036 if (!hasSuffix)
1037 return option.equals(name);
1038
1039 if (!option.startsWith(name))
1040 return false;
1041
1042 if (choices != null) {
1043 String arg = option.substring(name.length());
1044 if (choiceKind == ChoiceKind.ONEOF)
1045 return choices.contains(arg);
1046 else {
1047 for (String a: arg.split(",+")) {
1048 if (!choices.contains(a))
1049 return false;
1050 }
1051 }
1052 }
1053
1054 return true;
1055 }
1056
1057 /**
1058 * Handles an option.
1059 * If an argument for the option is required, depending on spec of the option, it will be found
1060 * as part of the current arg (following ':' or '=') or in the following argument.
1061 * This is the recommended way to handle an option directly, instead of calling the underlying
1062 * {@link #process process} methods.
1063 * @param helper a helper to provide access to the environment
1064 * @param arg the arg string that identified this option
1065 * @param rest the remaining strings to be analysed
1066 * @throws InvalidValueException if the value of the option was invalid
1067 * @implNote The return value is the opposite of that used by {@link #process}.
1068 */
1069 public void handleOption(OptionHelper helper, String arg, Iterator<String> rest) throws InvalidValueException {
1070 if (hasArg()) {
1071 String option;
1072 String operand;
1073 int sep = findSeparator(arg);
1074 if (getArgKind() == Option.ArgKind.ADJACENT) {
1075 option = primaryName; // aliases not supported
1076 operand = arg.substring(primaryName.length());
1077 } else if (sep > 0) {
1078 option = arg.substring(0, sep);
1079 operand = arg.substring(sep + 1);
1080 } else {
1081 if (!rest.hasNext()) {
1082 throw helper.newInvalidValueException("err.req.arg", arg);
1083 }
1084 option = arg;
1085 operand = rest.next();
1086 }
1087 process(helper, option, operand);
1088 } else {
1089 process(helper, arg);
1090 }
1091 }
1092
1093 /**
1094 * Processes an option that either does not need an argument,
1095 * or which contains an argument within it, following a separator.
1096 * @param helper a helper to provide access to the environment
1097 * @param option the option to be processed
1098 * @throws InvalidValueException if an error occurred
1099 */
1100 public void process(OptionHelper helper, String option) throws InvalidValueException {
1101 if (argKind == ArgKind.NONE) {
1102 process(helper, primaryName, option);
1103 } else {
1104 int sep = findSeparator(option);
1105 process(helper, primaryName, option.substring(sep + 1));
1106 }
1107 }
1108
1109 /**
1110 * Processes an option by updating the environment via a helper object.
1111 * @param helper a helper to provide access to the environment
1112 * @param option the option to be processed
1113 * @param arg the value to associate with the option, or a default value
1114 * to be used if the option does not otherwise take an argument.
1115 * @throws InvalidValueException if an error occurred
1116 */
1117 public void process(OptionHelper helper, String option, String arg) throws InvalidValueException {
1118 if (choices != null) {
1119 if (choiceKind == ChoiceKind.ONEOF) {
1120 // some clients like to see just one of option+choice set
1121 for (String s : choices)
1122 helper.remove(primaryName + s);
1123 String opt = primaryName + arg;
1124 helper.put(opt, opt);
1125 // some clients like to see option (without trailing ":")
1126 // set to arg
1127 String nm = primaryName.substring(0, primaryName.length() - 1);
1128 helper.put(nm, arg);
1129 } else {
1130 // set option+word for each word in arg
1131 for (String a: arg.split(",+")) {
1132 String opt = primaryName + a;
1133 helper.put(opt, opt);
1134 }
1135 }
1136 }
1137 helper.put(primaryName, arg);
1138 if (group == OptionGroup.FILEMANAGER)
1139 helper.handleFileManagerOption(this, arg);
1140 }
1141
1142 /**
1143 * Returns a pattern to analyze the value for an option.
1144 * @return the pattern
1145 * @throws UnsupportedOperationException if an option does not provide a pattern.
1146 */
1147 public Pattern getPattern() {
1148 throw new UnsupportedOperationException();
1149 }
1150
1151 /**
1152 * Scans a word to find the first separator character, either colon or equals.
1153 * @param word the word to be scanned
1154 * @return the position of the first':' or '=' character in the word,
1155 * or -1 if none found
1156 */
1157 private static int findSeparator(String word) {
1158 for (int i = 0; i < word.length(); i++) {
1159 switch (word.charAt(i)) {
1160 case ':': case '=':
1161 return i;
1162 }
1163 }
1164 return -1;
1165 }
1166
1167 /** The indent for the option synopsis. */
1168 private static final String SMALL_INDENT = " ";
1169 /** The automatic indent for the description. */
1170 private static final String LARGE_INDENT = " ";
1171 /** The space allowed for the synopsis, if the description is to be shown on the same line. */
1172 private static final int DEFAULT_SYNOPSIS_WIDTH = 28;
1173 /** The nominal maximum line length, when seeing if text will fit on a line. */
1174 private static final int DEFAULT_MAX_LINE_LENGTH = 80;
1175 /** The format for a single-line help entry. */
1176 private static final String COMPACT_FORMAT = SMALL_INDENT + "%-" + DEFAULT_SYNOPSIS_WIDTH + "s %s";
1177
1178 /**
1179 * Writes help text for this option to the log.
1180 * @param log the log
1181 */
1182 protected void help(Log log) {
1183 help(log, log.localize(PrefixKind.JAVAC, descrKey));
1184 }
1185
1186 protected void help(Log log, String descr) {
1187 String synopses = Arrays.stream(names)
1188 .map(s -> helpSynopsis(s, log))
1189 .collect(Collectors.joining(", "));
1190
1191 // If option synopses and description fit on a single line of reasonable length,
1192 // display using COMPACT_FORMAT
1193 if (synopses.length() < DEFAULT_SYNOPSIS_WIDTH
1194 && !descr.contains("\n")
1195 && (SMALL_INDENT.length() + DEFAULT_SYNOPSIS_WIDTH + 1 + descr.length() <= DEFAULT_MAX_LINE_LENGTH)) {
1196 log.printRawLines(WriterKind.STDOUT, String.format(COMPACT_FORMAT, synopses, descr));
1197 return;
1198 }
1199
1200 // If option synopses fit on a single line of reasonable length, show that;
1201 // otherwise, show 1 per line
1202 if (synopses.length() <= DEFAULT_MAX_LINE_LENGTH) {
1203 log.printRawLines(WriterKind.STDOUT, SMALL_INDENT + synopses);
1204 } else {
1205 for (String name: names) {
1206 log.printRawLines(WriterKind.STDOUT, SMALL_INDENT + helpSynopsis(name, log));
1207 }
1208 }
1209
1210 // Finally, show the description
1211 log.printRawLines(WriterKind.STDOUT, LARGE_INDENT + descr.replace("\n", "\n" + LARGE_INDENT));
1212 }
1213
1214 /**
1215 * Composes the initial synopsis of one of the forms for this option.
1216 * @param name the name of this form of the option
1217 * @param log the log used to localize the description of the arguments
1218 * @return the synopsis
1219 */
1220 private String helpSynopsis(String name, Log log) {
1221 StringBuilder sb = new StringBuilder();
1222 sb.append(name);
1223 if (argsNameKey == null) {
1224 if (choices != null) {
1225 if (!name.endsWith(":"))
1226 sb.append(" ");
1227 String sep = "{";
1228 for (String choice : choices) {
1229 sb.append(sep);
1230 sb.append(choice);
1231 sep = ",";
1232 }
1233 sb.append("}");
1234 }
1235 } else {
1236 if (!name.matches(".*[=:]$") && argKind != ArgKind.ADJACENT)
1237 sb.append(" ");
1238 sb.append(log.localize(PrefixKind.JAVAC, argsNameKey));
1239 }
1240
1241 return sb.toString();
1242 }
1243
1244 // For -XpkgInfo:value
1245 public enum PkgInfo {
1246 /**
1247 * Always generate package-info.class for every package-info.java file.
1248 * The file may be empty if there annotations with a RetentionPolicy
1249 * of CLASS or RUNTIME. This option may be useful in conjunction with
1250 * build systems (such as Ant) that expect javac to generate at least
1251 * one .class file for every .java file.
1252 */
1253 ALWAYS,
1254 /**
1255 * Generate a package-info.class file if package-info.java contains
1256 * annotations. The file may be empty if all the annotations have
1257 * a RetentionPolicy of SOURCE.
1258 * This value is just for backwards compatibility with earlier behavior.
1259 * Either of the other two values are to be preferred to using this one.
1260 */
1261 LEGACY,
1262 /**
1263 * Generate a package-info.class file if and only if there are annotations
1264 * in package-info.java to be written into it.
1265 */
1266 NONEMPTY;
1267
1268 public static PkgInfo get(Options options) {
1269 String v = options.get(XPKGINFO);
1270 return (v == null
1271 ? PkgInfo.LEGACY
1272 : PkgInfo.valueOf(StringUtils.toUpperCase(v)));
1273 }
1274 }
1275
1276 private static Set<String> getXLintChoices() {
1277 Set<String> choices = new LinkedHashSet<>();
1278 choices.add("all");
1279 for (Lint.LintCategory c : Lint.LintCategory.values()) {
1280 choices.add(c.option);
1281 choices.add("-" + c.option);
1282 }
1283 choices.add("none");
1284 return choices;
1285 }
1286
1287 /**
1288 * Returns the set of options supported by the command line tool.
1289 * @return the set of options.
1290 */
1291 static Set<Option> getJavaCompilerOptions() {
1292 return EnumSet.allOf(Option.class);
1293 }
1294
1295 /**
1296 * Returns the set of options supported by the built-in file manager.
1297 * @return the set of options.
1298 */
1299 public static Set<Option> getJavacFileManagerOptions() {
1300 return getOptions(FILEMANAGER);
1301 }
1302
1303 /**
1304 * Returns the set of options supported by this implementation of
1305 * the JavaCompiler API, via {@link JavaCompiler#getTask}.
1306 * @return the set of options.
1307 */
1308 public static Set<Option> getJavacToolOptions() {
1309 return getOptions(BASIC);
1310 }
1311
1312 private static Set<Option> getOptions(OptionGroup group) {
1313 return Arrays.stream(Option.values())
1314 .filter(o -> o.group == group)
1315 .collect(Collectors.toCollection(() -> EnumSet.noneOf(Option.class)));
1316 }
1317
1318 }