1 /*
2 * Copyright (c) 1999, 2014, 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.*;
29 import java.util.Collection;
30 import java.util.HashMap;
31 import java.util.HashSet;
32 import java.util.LinkedHashMap;
33 import java.util.LinkedHashSet;
34 import java.util.Map;
35 import java.util.MissingResourceException;
36 import java.util.Queue;
37 import java.util.ResourceBundle;
38 import java.util.Set;
39
40 import javax.annotation.processing.Processor;
41 import javax.lang.model.SourceVersion;
42 import javax.tools.DiagnosticListener;
43 import javax.tools.JavaFileManager;
44 import javax.tools.JavaFileObject;
45 import javax.tools.StandardLocation;
46
47 import com.sun.source.util.TaskEvent;
48 import com.sun.tools.javac.api.MultiTaskListener;
49 import com.sun.tools.javac.code.*;
50 import com.sun.tools.javac.code.Lint.LintCategory;
51 import com.sun.tools.javac.code.Symbol.ClassSymbol;
52 import com.sun.tools.javac.code.Symbol.CompletionFailure;
53 import com.sun.tools.javac.code.Symbol.PackageSymbol;
54 import com.sun.tools.javac.comp.*;
55 import com.sun.tools.javac.comp.CompileStates.CompileState;
56 import com.sun.tools.javac.file.JavacFileManager;
57 import com.sun.tools.javac.jvm.*;
58 import com.sun.tools.javac.parser.*;
59 import com.sun.tools.javac.platform.PlatformProvider;
60 import com.sun.tools.javac.processing.*;
61 import com.sun.tools.javac.tree.*;
62 import com.sun.tools.javac.tree.JCTree.JCClassDecl;
63 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
64 import com.sun.tools.javac.tree.JCTree.JCExpression;
65 import com.sun.tools.javac.tree.JCTree.JCLambda;
66 import com.sun.tools.javac.tree.JCTree.JCMemberReference;
67 import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
68 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
69 import com.sun.tools.javac.util.*;
70 import com.sun.tools.javac.util.Log.WriterKind;
71
72 import static com.sun.tools.javac.code.Kinds.Kind.*;
73 import static com.sun.tools.javac.code.TypeTag.CLASS;
74 import static com.sun.tools.javac.main.Option.*;
75 import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;
76 import static javax.tools.StandardLocation.CLASS_OUTPUT;
77
78 /** This class could be the main entry point for GJC when GJC is used as a
79 * component in a larger software system. It provides operations to
80 * construct a new compiler, and to run a new compiler on a set of source
81 * files.
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 risk.
85 * This code and its internal interfaces are subject to change or
86 * deletion without notice.</b>
87 */
88 public class JavaCompiler {
89 /** The context key for the compiler. */
90 protected static final Context.Key<JavaCompiler> compilerKey = new Context.Key<>();
91
92 /** Get the JavaCompiler instance for this context. */
93 public static JavaCompiler instance(Context context) {
94 JavaCompiler instance = context.get(compilerKey);
95 if (instance == null)
96 instance = new JavaCompiler(context);
97 return instance;
98 }
99
100 /** The current version number as a string.
101 */
102 public static String version() {
103 return version("release"); // mm.nn.oo[-milestone]
104 }
105
106 /** The current full version number as a string.
107 */
108 public static String fullVersion() {
109 return version("full"); // mm.mm.oo[-milestone]-build
110 }
111
112 private static final String versionRBName = "com.sun.tools.javac.resources.version";
113 private static ResourceBundle versionRB;
114
115 private static String version(String key) {
116 if (versionRB == null) {
117 try {
118 versionRB = ResourceBundle.getBundle(versionRBName);
119 } catch (MissingResourceException e) {
120 return Log.getLocalizedString("version.not.available");
121 }
122 }
123 try {
124 return versionRB.getString(key);
125 }
126 catch (MissingResourceException e) {
127 return Log.getLocalizedString("version.not.available");
128 }
129 }
130
131 /**
132 * Control how the compiler's latter phases (attr, flow, desugar, generate)
133 * are connected. Each individual file is processed by each phase in turn,
134 * but with different compile policies, you can control the order in which
135 * each class is processed through its next phase.
136 *
137 * <p>Generally speaking, the compiler will "fail fast" in the face of
138 * errors, although not aggressively so. flow, desugar, etc become no-ops
139 * once any errors have occurred. No attempt is currently made to determine
140 * if it might be safe to process a class through its next phase because
141 * it does not depend on any unrelated errors that might have occurred.
142 */
143 protected static enum CompilePolicy {
144 /**
145 * Just attribute the parse trees.
146 */
147 ATTR_ONLY,
148
149 /**
150 * Just attribute and do flow analysis on the parse trees.
151 * This should catch most user errors.
152 */
153 CHECK_ONLY,
154
155 /**
156 * Attribute everything, then do flow analysis for everything,
157 * then desugar everything, and only then generate output.
158 * This means no output will be generated if there are any
159 * errors in any classes.
160 */
161 SIMPLE,
162
163 /**
164 * Groups the classes for each source file together, then process
165 * each group in a manner equivalent to the {@code SIMPLE} policy.
166 * This means no output will be generated if there are any
167 * errors in any of the classes in a source file.
168 */
169 BY_FILE,
170
171 /**
172 * Completely process each entry on the todo list in turn.
173 * -- this is the same for 1.5.
174 * Means output might be generated for some classes in a compilation unit
175 * and not others.
176 */
177 BY_TODO;
178
179 static CompilePolicy decode(String option) {
180 if (option == null)
181 return DEFAULT_COMPILE_POLICY;
182 else if (option.equals("attr"))
183 return ATTR_ONLY;
184 else if (option.equals("check"))
185 return CHECK_ONLY;
186 else if (option.equals("simple"))
187 return SIMPLE;
188 else if (option.equals("byfile"))
189 return BY_FILE;
190 else if (option.equals("bytodo"))
191 return BY_TODO;
192 else
193 return DEFAULT_COMPILE_POLICY;
194 }
195 }
196
197 private static final CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO;
198
199 protected static enum ImplicitSourcePolicy {
200 /** Don't generate or process implicitly read source files. */
201 NONE,
202 /** Generate classes for implicitly read source files. */
203 CLASS,
204 /** Like CLASS, but generate warnings if annotation processing occurs */
205 UNSET;
206
207 static ImplicitSourcePolicy decode(String option) {
208 if (option == null)
209 return UNSET;
210 else if (option.equals("none"))
211 return NONE;
212 else if (option.equals("class"))
213 return CLASS;
214 else
215 return UNSET;
216 }
217 }
218
219 /** The log to be used for error reporting.
220 */
221 public Log log;
222
223 /** Factory for creating diagnostic objects
224 */
225 JCDiagnostic.Factory diagFactory;
226
227 /** The tree factory module.
228 */
229 protected TreeMaker make;
230
231 /** The class finder.
232 */
233 protected ClassFinder finder;
234
235 /** The class reader.
236 */
237 protected ClassReader reader;
238
239 /** The class writer.
240 */
241 protected ClassWriter writer;
242
243 /** The native header writer.
244 */
245 protected JNIWriter jniWriter;
246
247 /** The module for the symbol table entry phases.
248 */
249 protected Enter enter;
250
251 /** The symbol table.
252 */
253 protected Symtab syms;
254
255 /** The language version.
256 */
257 protected Source source;
258
259 /** The module for code generation.
260 */
261 protected Gen gen;
262
263 /** The name table.
264 */
265 protected Names names;
266
267 /** The attributor.
268 */
269 protected Attr attr;
270
271 /** The attributor.
272 */
273 protected Check chk;
274
275 /** The flow analyzer.
276 */
277 protected Flow flow;
278
279 /** The type eraser.
280 */
281 protected TransTypes transTypes;
282
283 /** The syntactic sugar desweetener.
284 */
285 protected Lower lower;
286
287 /** The annotation annotator.
288 */
289 protected Annotate annotate;
290
291 /** Force a completion failure on this name
292 */
293 protected final Name completionFailureName;
294
295 /** Type utilities.
296 */
297 protected Types types;
298
299 /** Access to file objects.
300 */
301 protected JavaFileManager fileManager;
302
303 /** Factory for parsers.
304 */
305 protected ParserFactory parserFactory;
306
307 /** Broadcasting listener for progress events
308 */
309 protected MultiTaskListener taskListener;
310
311 /**
312 * SourceCompleter that delegates to the readSourceFile method of this class.
313 */
314 protected final Symbol.Completer sourceCompleter =
315 new Symbol.Completer() {
316 @Override
317 public void complete(Symbol sym) throws CompletionFailure {
318 readSourceFile((ClassSymbol) sym);
319 }
320 };
321
322 /**
323 * Command line options.
324 */
325 protected Options options;
326
327 protected Context context;
328
329 /**
330 * Flag set if any annotation processing occurred.
331 **/
332 protected boolean annotationProcessingOccurred;
333
334 /**
335 * Flag set if any implicit source files read.
336 **/
337 protected boolean implicitSourceFilesRead;
338
339 protected CompileStates compileStates;
340
341 /** Construct a new compiler using a shared context.
342 */
343 public JavaCompiler(Context context) {
344 this.context = context;
345 context.put(compilerKey, this);
346
347 // if fileManager not already set, register the JavacFileManager to be used
348 if (context.get(JavaFileManager.class) == null)
349 JavacFileManager.preRegister(context);
350
351 names = Names.instance(context);
352 log = Log.instance(context);
353 diagFactory = JCDiagnostic.Factory.instance(context);
354 finder = ClassFinder.instance(context);
355 reader = ClassReader.instance(context);
356 make = TreeMaker.instance(context);
357 writer = ClassWriter.instance(context);
358 jniWriter = JNIWriter.instance(context);
359 enter = Enter.instance(context);
360 todo = Todo.instance(context);
361
362 fileManager = context.get(JavaFileManager.class);
363 parserFactory = ParserFactory.instance(context);
364 compileStates = CompileStates.instance(context);
365
366 try {
367 // catch completion problems with predefineds
368 syms = Symtab.instance(context);
369 } catch (CompletionFailure ex) {
370 // inlined Check.completionError as it is not initialized yet
371 log.error("cant.access", ex.sym, ex.getDetailValue());
372 if (ex instanceof ClassFinder.BadClassFile)
373 throw new Abort();
374 }
375 source = Source.instance(context);
376 Target target = Target.instance(context);
377 attr = Attr.instance(context);
378 chk = Check.instance(context);
379 gen = Gen.instance(context);
380 flow = Flow.instance(context);
381 transTypes = TransTypes.instance(context);
382 lower = Lower.instance(context);
383 annotate = Annotate.instance(context);
384 types = Types.instance(context);
385 taskListener = MultiTaskListener.instance(context);
386
387 finder.sourceCompleter = sourceCompleter;
388
389 options = Options.instance(context);
390
391 verbose = options.isSet(VERBOSE);
392 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s
393 stubOutput = options.isSet("-stubs");
394 relax = options.isSet("-relax");
395 printFlat = options.isSet("-printflat");
396 attrParseOnly = options.isSet("-attrparseonly");
397 encoding = options.get(ENCODING);
398 lineDebugInfo = options.isUnset(G_CUSTOM) ||
399 options.isSet(G_CUSTOM, "lines");
400 genEndPos = options.isSet(XJCOV) ||
401 context.get(DiagnosticListener.class) != null;
402 devVerbose = options.isSet("dev");
403 processPcks = options.isSet("process.packages");
404 werror = options.isSet(WERROR);
405
406 verboseCompilePolicy = options.isSet("verboseCompilePolicy");
407
408 if (attrParseOnly)
409 compilePolicy = CompilePolicy.ATTR_ONLY;
410 else
411 compilePolicy = CompilePolicy.decode(options.get("compilePolicy"));
412
413 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit"));
414
415 completionFailureName =
416 options.isSet("failcomplete")
417 ? names.fromString(options.get("failcomplete"))
418 : null;
419
420 shouldStopPolicyIfError =
421 options.isSet("shouldStopPolicy") // backwards compatible
422 ? CompileState.valueOf(options.get("shouldStopPolicy"))
423 : options.isSet("shouldStopPolicyIfError")
424 ? CompileState.valueOf(options.get("shouldStopPolicyIfError"))
425 : CompileState.INIT;
426 shouldStopPolicyIfNoError =
427 options.isSet("shouldStopPolicyIfNoError")
428 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError"))
429 : CompileState.GENERATE;
430
431 if (options.isUnset("oldDiags"))
432 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context));
433
434 PlatformProvider platformProvider = context.get(PlatformProvider.class);
435
436 if (platformProvider != null)
437 closeables = closeables.prepend(platformProvider);
438 }
439
440 /* Switches:
441 */
442
443 /** Verbose output.
444 */
445 public boolean verbose;
446
447 /** Emit plain Java source files rather than class files.
448 */
449 public boolean sourceOutput;
450
451 /** Emit stub source files rather than class files.
452 */
453 public boolean stubOutput;
454
455 /** Generate attributed parse tree only.
456 */
457 public boolean attrParseOnly;
458
459 /** Switch: relax some constraints for producing the jsr14 prototype.
460 */
461 boolean relax;
462
463 /** Debug switch: Emit Java sources after inner class flattening.
464 */
465 public boolean printFlat;
466
467 /** The encoding to be used for source input.
468 */
469 public String encoding;
470
471 /** Generate code with the LineNumberTable attribute for debugging
472 */
473 public boolean lineDebugInfo;
474
475 /** Switch: should we store the ending positions?
476 */
477 public boolean genEndPos;
478
479 /** Switch: should we debug ignored exceptions
480 */
481 protected boolean devVerbose;
482
483 /** Switch: should we (annotation) process packages as well
484 */
485 protected boolean processPcks;
486
487 /** Switch: treat warnings as errors
488 */
489 protected boolean werror;
490
491 /** Switch: is annotation processing requested explicitly via
492 * CompilationTask.setProcessors?
493 */
494 protected boolean explicitAnnotationProcessingRequested = false;
495
496 /**
497 * The policy for the order in which to perform the compilation
498 */
499 protected CompilePolicy compilePolicy;
500
501 /**
502 * The policy for what to do with implicitly read source files
503 */
504 protected ImplicitSourcePolicy implicitSourcePolicy;
505
506 /**
507 * Report activity related to compilePolicy
508 */
509 public boolean verboseCompilePolicy;
510
511 /**
512 * Policy of how far to continue compilation after errors have occurred.
513 * Set this to minimum CompileState (INIT) to stop as soon as possible
514 * after errors.
515 */
516 public CompileState shouldStopPolicyIfError;
517
518 /**
519 * Policy of how far to continue compilation when no errors have occurred.
520 * Set this to maximum CompileState (GENERATE) to perform full compilation.
521 * Set this lower to perform partial compilation, such as -proc:only.
522 */
523 public CompileState shouldStopPolicyIfNoError;
524
525 /** A queue of all as yet unattributed classes.
526 */
527 public Todo todo;
528
529 /** A list of items to be closed when the compilation is complete.
530 */
531 public List<Closeable> closeables = List.nil();
532
533 /** The set of currently compiled inputfiles, needed to ensure
534 * we don't accidentally overwrite an input file when -s is set.
535 * initialized by `compile'.
536 */
537 protected Set<JavaFileObject> inputFiles = new HashSet<>();
538
539 protected boolean shouldStop(CompileState cs) {
540 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError())
541 ? shouldStopPolicyIfError
542 : shouldStopPolicyIfNoError;
543 return cs.isAfter(shouldStopPolicy);
544 }
545
546 /** The number of errors reported so far.
547 */
548 public int errorCount() {
549 if (werror && log.nerrors == 0 && log.nwarnings > 0) {
550 log.error("warnings.and.werror");
551 }
552 return log.nerrors;
553 }
554
555 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) {
556 return shouldStop(cs) ? new ListBuffer<T>() : queue;
557 }
558
559 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) {
560 return shouldStop(cs) ? List.<T>nil() : list;
561 }
562
563 /** The number of warnings reported so far.
564 */
565 public int warningCount() {
566 return log.nwarnings;
567 }
568
569 /** Try to open input stream with given name.
570 * Report an error if this fails.
571 * @param filename The file name of the input stream to be opened.
572 */
573 public CharSequence readSource(JavaFileObject filename) {
574 try {
575 inputFiles.add(filename);
576 return filename.getCharContent(false);
577 } catch (IOException e) {
578 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
579 return null;
580 }
581 }
582
583 /** Parse contents of input stream.
584 * @param filename The name of the file from which input stream comes.
585 * @param content The characters to be parsed.
586 */
587 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) {
588 long msec = now();
589 JCCompilationUnit tree = make.TopLevel(List.<JCTree>nil());
590 if (content != null) {
591 if (verbose) {
592 log.printVerbose("parsing.started", filename);
593 }
594 if (!taskListener.isEmpty()) {
595 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename);
596 taskListener.started(e);
597 keepComments = true;
598 genEndPos = true;
599 }
600 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo);
601 tree = parser.parseCompilationUnit();
602 if (verbose) {
603 log.printVerbose("parsing.done", Long.toString(elapsed(msec)));
604 }
605 }
606
607 tree.sourcefile = filename;
608
609 if (content != null && !taskListener.isEmpty()) {
610 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree);
611 taskListener.finished(e);
612 }
613
614 return tree;
615 }
616 // where
617 public boolean keepComments = false;
618 protected boolean keepComments() {
619 return keepComments || sourceOutput || stubOutput;
620 }
621
622
623 /** Parse contents of file.
624 * @param filename The name of the file to be parsed.
625 */
626 @Deprecated
627 public JCTree.JCCompilationUnit parse(String filename) {
628 JavacFileManager fm = (JavacFileManager)fileManager;
629 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next());
630 }
631
632 /** Parse contents of file.
633 * @param filename The name of the file to be parsed.
634 */
635 public JCTree.JCCompilationUnit parse(JavaFileObject filename) {
636 JavaFileObject prev = log.useSource(filename);
637 try {
638 JCTree.JCCompilationUnit t = parse(filename, readSource(filename));
639 if (t.endPositions != null)
640 log.setEndPosTable(filename, t.endPositions);
641 return t;
642 } finally {
643 log.useSource(prev);
644 }
645 }
646
647 /** Resolve an identifier which may be the binary name of a class or
648 * the Java name of a class or package.
649 * @param name The name to resolve
650 */
651 public Symbol resolveBinaryNameOrIdent(String name) {
652 try {
653 Name flatname = names.fromString(name.replace("/", "."));
654 return finder.loadClass(flatname);
655 } catch (CompletionFailure ignore) {
656 return resolveIdent(name);
657 }
658 }
659
660 /** Resolve an identifier.
661 * @param name The identifier to resolve
662 */
663 public Symbol resolveIdent(String name) {
664 if (name.equals(""))
665 return syms.errSymbol;
666 JavaFileObject prev = log.useSource(null);
667 try {
668 JCExpression tree = null;
669 for (String s : name.split("\\.", -1)) {
670 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords
671 return syms.errSymbol;
672 tree = (tree == null) ? make.Ident(names.fromString(s))
673 : make.Select(tree, names.fromString(s));
674 }
675 JCCompilationUnit toplevel =
676 make.TopLevel(List.<JCTree>nil());
677 toplevel.packge = syms.unnamedPackage;
678 return attr.attribIdent(tree, toplevel);
679 } finally {
680 log.useSource(prev);
681 }
682 }
683
684 /** Emit plain Java source for a class.
685 * @param env The attribution environment of the outermost class
686 * containing this class.
687 * @param cdef The class definition to be printed.
688 */
689 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
690 JavaFileObject outFile
691 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
692 cdef.sym.flatname.toString(),
693 JavaFileObject.Kind.SOURCE,
694 null);
695 if (inputFiles.contains(outFile)) {
696 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile);
697 return null;
698 } else {
699 try (BufferedWriter out = new BufferedWriter(outFile.openWriter())) {
700 new Pretty(out, true).printUnit(env.toplevel, cdef);
701 if (verbose)
702 log.printVerbose("wrote.file", outFile);
703 }
704 return outFile;
705 }
706 }
707
708 /** Generate code and emit a class file for a given class
709 * @param env The attribution environment of the outermost class
710 * containing this class.
711 * @param cdef The class definition from which code is generated.
712 */
713 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
714 try {
715 if (gen.genClass(env, cdef) && (errorCount() == 0))
716 return writer.writeClass(cdef.sym);
717 } catch (ClassWriter.PoolOverflow ex) {
718 log.error(cdef.pos(), "limit.pool");
719 } catch (ClassWriter.StringOverflow ex) {
720 log.error(cdef.pos(), "limit.string.overflow",
721 ex.value.substring(0, 20));
722 } catch (CompletionFailure ex) {
723 chk.completionError(cdef.pos(), ex);
724 }
725 return null;
726 }
727
728 /** Compile a source file that has been accessed by the class finder.
729 * @param c The class the source file of which needs to be compiled.
730 */
731 private void readSourceFile(ClassSymbol c) throws CompletionFailure {
732 readSourceFile(null, c);
733 }
734
735 /** Compile a ClassSymbol from source, optionally using the given compilation unit as
736 * the source tree.
737 * @param tree the compilation unit in which the given ClassSymbol resides,
738 * or null if should be parsed from source
739 * @param c the ClassSymbol to complete
740 */
741 public void readSourceFile(JCCompilationUnit tree, ClassSymbol c) throws CompletionFailure {
742 if (completionFailureName == c.fullname) {
743 throw new CompletionFailure(c, "user-selected completion failure by class name");
744 }
745 JavaFileObject filename = c.classfile;
746 JavaFileObject prev = log.useSource(filename);
747
748 if (tree == null) {
749 try {
750 tree = parse(filename, filename.getCharContent(false));
751 } catch (IOException e) {
752 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
753 tree = make.TopLevel(List.<JCTree>nil());
754 } finally {
755 log.useSource(prev);
756 }
757 }
758
759 if (!taskListener.isEmpty()) {
760 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
761 taskListener.started(e);
762 }
763
764 enter.complete(List.of(tree), c);
765
766 if (!taskListener.isEmpty()) {
767 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
768 taskListener.finished(e);
769 }
770
771 if (enter.getEnv(c) == null) {
772 boolean isPkgInfo =
773 tree.sourcefile.isNameCompatible("package-info",
774 JavaFileObject.Kind.SOURCE);
775 if (isPkgInfo) {
776 if (enter.getEnv(tree.packge) == null) {
777 JCDiagnostic diag =
778 diagFactory.fragment("file.does.not.contain.package",
779 c.location());
780 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory);
781 }
782 } else {
783 JCDiagnostic diag =
784 diagFactory.fragment("file.doesnt.contain.class",
785 c.getQualifiedName());
786 throw new ClassFinder.BadClassFile(c, filename, diag, diagFactory);
787 }
788 }
789
790 implicitSourceFilesRead = true;
791 }
792
793 /** Track when the JavaCompiler has been used to compile something. */
794 private boolean hasBeenUsed = false;
795 private long start_msec = 0;
796 public long elapsed_msec = 0;
797
798 public void compile(List<JavaFileObject> sourceFileObject)
799 throws Throwable {
800 compile(sourceFileObject, List.<String>nil(), null);
801 }
802
803 /**
804 * Main method: compile a list of files, return all compiled classes
805 *
806 * @param sourceFileObjects file objects to be compiled
807 * @param classnames class names to process for annotations
808 * @param processors user provided annotation processors to bypass
809 * discovery, {@code null} means that no processors were provided
810 */
811 public void compile(Collection<JavaFileObject> sourceFileObjects,
812 Collection<String> classnames,
813 Iterable<? extends Processor> processors)
814 {
815 if (!taskListener.isEmpty()) {
816 taskListener.started(new TaskEvent(TaskEvent.Kind.COMPILATION));
817 }
818
819 if (processors != null && processors.iterator().hasNext())
820 explicitAnnotationProcessingRequested = true;
821 // as a JavaCompiler can only be used once, throw an exception if
822 // it has been used before.
823 if (hasBeenUsed)
824 throw new AssertionError("attempt to reuse JavaCompiler");
825 hasBeenUsed = true;
826
827 // forcibly set the equivalent of -Xlint:-options, so that no further
828 // warnings about command line options are generated from this point on
829 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true");
830 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option);
831
832 start_msec = now();
833
834 try {
835 initProcessAnnotations(processors);
836
837 // These method calls must be chained to avoid memory leaks
838 processAnnotations(
839 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))),
840 classnames);
841
842 // If it's safe to do so, skip attr / flow / gen for implicit classes
843 if (taskListener.isEmpty() &&
844 implicitSourcePolicy == ImplicitSourcePolicy.NONE) {
845 todo.retainFiles(inputFiles);
846 }
847
848 switch (compilePolicy) {
849 case ATTR_ONLY:
850 attribute(todo);
851 break;
852
853 case CHECK_ONLY:
854 flow(attribute(todo));
855 break;
856
857 case SIMPLE:
858 generate(desugar(flow(attribute(todo))));
859 break;
860
861 case BY_FILE: {
862 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile();
863 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) {
864 generate(desugar(flow(attribute(q.remove()))));
865 }
866 }
867 break;
868
869 case BY_TODO:
870 while (!todo.isEmpty())
871 generate(desugar(flow(attribute(todo.remove()))));
872 break;
873
874 default:
875 Assert.error("unknown compile policy");
876 }
877 } catch (Abort ex) {
878 if (devVerbose)
879 ex.printStackTrace(System.err);
880 } finally {
881 if (verbose) {
882 elapsed_msec = elapsed(start_msec);
883 log.printVerbose("total", Long.toString(elapsed_msec));
884 }
885
886 reportDeferredDiagnostics();
887
888 if (!log.hasDiagnosticListener()) {
889 printCount("error", errorCount());
890 printCount("warn", warningCount());
891 }
892 if (!taskListener.isEmpty()) {
893 taskListener.finished(new TaskEvent(TaskEvent.Kind.COMPILATION));
894 }
895 close();
896 if (procEnvImpl != null)
897 procEnvImpl.close();
898 }
899 }
900
901 /**
902 * Set needRootClasses to true, in JavaCompiler subclass constructor
903 * that want to collect public apis of classes supplied on the command line.
904 */
905 protected boolean needRootClasses = false;
906
907 /**
908 * The list of classes explicitly supplied on the command line for compilation.
909 * Not always populated.
910 */
911 private List<JCClassDecl> rootClasses;
912
913 /**
914 * Parses a list of files.
915 */
916 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) {
917 if (shouldStop(CompileState.PARSE))
918 return List.nil();
919
920 //parse all files
921 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>();
922 Set<JavaFileObject> filesSoFar = new HashSet<>();
923 for (JavaFileObject fileObject : fileObjects) {
924 if (!filesSoFar.contains(fileObject)) {
925 filesSoFar.add(fileObject);
926 trees.append(parse(fileObject));
927 }
928 }
929 return trees.toList();
930 }
931
932 /**
933 * Enter the symbols found in a list of parse trees if the compilation
934 * is expected to proceed beyond anno processing into attr.
935 * As a side-effect, this puts elements on the "todo" list.
936 * Also stores a list of all top level classes in rootClasses.
937 */
938 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) {
939 if (shouldStop(CompileState.ATTR))
940 return List.nil();
941 return enterTrees(roots);
942 }
943
944 /**
945 * Enter the symbols found in a list of parse trees.
946 * As a side-effect, this puts elements on the "todo" list.
947 * Also stores a list of all top level classes in rootClasses.
948 */
949 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) {
950 //enter symbols for all files
951 if (!taskListener.isEmpty()) {
952 for (JCCompilationUnit unit: roots) {
953 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
954 taskListener.started(e);
955 }
956 }
957
958 enter.main(roots);
959
960 if (!taskListener.isEmpty()) {
961 for (JCCompilationUnit unit: roots) {
962 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
963 taskListener.finished(e);
964 }
965 }
966
967 // If generating source, or if tracking public apis,
968 // then remember the classes declared in
969 // the original compilation units listed on the command line.
970 if (needRootClasses || sourceOutput || stubOutput) {
971 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>();
972 for (JCCompilationUnit unit : roots) {
973 for (List<JCTree> defs = unit.defs;
974 defs.nonEmpty();
975 defs = defs.tail) {
976 if (defs.head instanceof JCClassDecl)
977 cdefs.append((JCClassDecl)defs.head);
978 }
979 }
980 rootClasses = cdefs.toList();
981 }
982
983 // Ensure the input files have been recorded. Although this is normally
984 // done by readSource, it may not have been done if the trees were read
985 // in a prior round of annotation processing, and the trees have been
986 // cleaned and are being reused.
987 for (JCCompilationUnit unit : roots) {
988 inputFiles.add(unit.sourcefile);
989 }
990
991 return roots;
992 }
993
994 /**
995 * Set to true to enable skeleton annotation processing code.
996 * Currently, we assume this variable will be replaced more
997 * advanced logic to figure out if annotation processing is
998 * needed.
999 */
1000 boolean processAnnotations = false;
1001
1002 Log.DeferredDiagnosticHandler deferredDiagnosticHandler;
1003
1004 /**
1005 * Object to handle annotation processing.
1006 */
1007 private JavacProcessingEnvironment procEnvImpl = null;
1008
1009 /**
1010 * Check if we should process annotations.
1011 * If so, and if no scanner is yet registered, then set up the DocCommentScanner
1012 * to catch doc comments, and set keepComments so the parser records them in
1013 * the compilation unit.
1014 *
1015 * @param processors user provided annotation processors to bypass
1016 * discovery, {@code null} means that no processors were provided
1017 */
1018 public void initProcessAnnotations(Iterable<? extends Processor> processors) {
1019 // Process annotations if processing is not disabled and there
1020 // is at least one Processor available.
1021 if (options.isSet(PROC, "none")) {
1022 processAnnotations = false;
1023 } else if (procEnvImpl == null) {
1024 procEnvImpl = JavacProcessingEnvironment.instance(context);
1025 procEnvImpl.setProcessors(processors);
1026 processAnnotations = procEnvImpl.atLeastOneProcessor();
1027
1028 if (processAnnotations) {
1029 options.put("save-parameter-names", "save-parameter-names");
1030 reader.saveParameterNames = true;
1031 keepComments = true;
1032 genEndPos = true;
1033 if (!taskListener.isEmpty())
1034 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
1035 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log);
1036 } else { // free resources
1037 procEnvImpl.close();
1038 }
1039 }
1040 }
1041
1042 // TODO: called by JavacTaskImpl
1043 public void processAnnotations(List<JCCompilationUnit> roots) {
1044 processAnnotations(roots, List.<String>nil());
1045 }
1046
1047 /**
1048 * Process any annotations found in the specified compilation units.
1049 * @param roots a list of compilation units
1050 * @return an instance of the compiler in which to complete the compilation
1051 */
1052 // Implementation note: when this method is called, log.deferredDiagnostics
1053 // will have been set true by initProcessAnnotations, meaning that any diagnostics
1054 // that are reported will go into the log.deferredDiagnostics queue.
1055 // By the time this method exits, log.deferDiagnostics must be set back to false,
1056 // and all deferredDiagnostics must have been handled: i.e. either reported
1057 // or determined to be transient, and therefore suppressed.
1058 public void processAnnotations(List<JCCompilationUnit> roots,
1059 Collection<String> classnames) {
1060 if (shouldStop(CompileState.PROCESS)) {
1061 // Errors were encountered.
1062 // Unless all the errors are resolve errors, the errors were parse errors
1063 // or other errors during enter which cannot be fixed by running
1064 // any annotation processors.
1065 if (unrecoverableError()) {
1066 deferredDiagnosticHandler.reportDeferredDiagnostics();
1067 log.popDiagnosticHandler(deferredDiagnosticHandler);
1068 return ;
1069 }
1070 }
1071
1072 // ASSERT: processAnnotations and procEnvImpl should have been set up by
1073 // by initProcessAnnotations
1074
1075 // NOTE: The !classnames.isEmpty() checks should be refactored to Main.
1076
1077 if (!processAnnotations) {
1078 // If there are no annotation processors present, and
1079 // annotation processing is to occur with compilation,
1080 // emit a warning.
1081 if (options.isSet(PROC, "only")) {
1082 log.warning("proc.proc-only.requested.no.procs");
1083 todo.clear();
1084 }
1085 // If not processing annotations, classnames must be empty
1086 if (!classnames.isEmpty()) {
1087 log.error("proc.no.explicit.annotation.processing.requested",
1088 classnames);
1089 }
1090 Assert.checkNull(deferredDiagnosticHandler);
1091 return ; // continue regular compilation
1092 }
1093
1094 Assert.checkNonNull(deferredDiagnosticHandler);
1095
1096 try {
1097 List<ClassSymbol> classSymbols = List.nil();
1098 List<PackageSymbol> pckSymbols = List.nil();
1099 if (!classnames.isEmpty()) {
1100 // Check for explicit request for annotation
1101 // processing
1102 if (!explicitAnnotationProcessingRequested()) {
1103 log.error("proc.no.explicit.annotation.processing.requested",
1104 classnames);
1105 deferredDiagnosticHandler.reportDeferredDiagnostics();
1106 log.popDiagnosticHandler(deferredDiagnosticHandler);
1107 return ; // TODO: Will this halt compilation?
1108 } else {
1109 boolean errors = false;
1110 for (String nameStr : classnames) {
1111 Symbol sym = resolveBinaryNameOrIdent(nameStr);
1112 if (sym == null ||
1113 (sym.kind == PCK && !processPcks) ||
1114 sym.kind == ABSENT_TYP) {
1115 log.error("proc.cant.find.class", nameStr);
1116 errors = true;
1117 continue;
1118 }
1119 try {
1120 if (sym.kind == PCK)
1121 sym.complete();
1122 if (sym.exists()) {
1123 if (sym.kind == PCK)
1124 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1125 else
1126 classSymbols = classSymbols.prepend((ClassSymbol)sym);
1127 continue;
1128 }
1129 Assert.check(sym.kind == PCK);
1130 log.warning("proc.package.does.not.exist", nameStr);
1131 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1132 } catch (CompletionFailure e) {
1133 log.error("proc.cant.find.class", nameStr);
1134 errors = true;
1135 continue;
1136 }
1137 }
1138 if (errors) {
1139 deferredDiagnosticHandler.reportDeferredDiagnostics();
1140 log.popDiagnosticHandler(deferredDiagnosticHandler);
1141 return ;
1142 }
1143 }
1144 }
1145 try {
1146 annotationProcessingOccurred =
1147 procEnvImpl.doProcessing(roots,
1148 classSymbols,
1149 pckSymbols,
1150 deferredDiagnosticHandler);
1151 // doProcessing will have handled deferred diagnostics
1152 } finally {
1153 procEnvImpl.close();
1154 }
1155 } catch (CompletionFailure ex) {
1156 log.error("cant.access", ex.sym, ex.getDetailValue());
1157 if (deferredDiagnosticHandler != null) {
1158 deferredDiagnosticHandler.reportDeferredDiagnostics();
1159 log.popDiagnosticHandler(deferredDiagnosticHandler);
1160 }
1161 }
1162 }
1163
1164 private boolean unrecoverableError() {
1165 if (deferredDiagnosticHandler != null) {
1166 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) {
1167 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE))
1168 return true;
1169 }
1170 }
1171 return false;
1172 }
1173
1174 boolean explicitAnnotationProcessingRequested() {
1175 return
1176 explicitAnnotationProcessingRequested ||
1177 explicitAnnotationProcessingRequested(options);
1178 }
1179
1180 static boolean explicitAnnotationProcessingRequested(Options options) {
1181 return
1182 options.isSet(PROCESSOR) ||
1183 options.isSet(PROCESSORPATH) ||
1184 options.isSet(PROC, "only") ||
1185 options.isSet(XPRINT);
1186 }
1187
1188 public void setDeferredDiagnosticHandler(Log.DeferredDiagnosticHandler deferredDiagnosticHandler) {
1189 this.deferredDiagnosticHandler = deferredDiagnosticHandler;
1190 }
1191
1192 /**
1193 * Attribute a list of parse trees, such as found on the "todo" list.
1194 * Note that attributing classes may cause additional files to be
1195 * parsed and entered via the SourceCompleter.
1196 * Attribution of the entries in the list does not stop if any errors occur.
1197 * @returns a list of environments for attributd classes.
1198 */
1199 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) {
1200 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1201 while (!envs.isEmpty())
1202 results.append(attribute(envs.remove()));
1203 return stopIfError(CompileState.ATTR, results);
1204 }
1205
1206 /**
1207 * Attribute a parse tree.
1208 * @returns the attributed parse tree
1209 */
1210 public Env<AttrContext> attribute(Env<AttrContext> env) {
1211 if (compileStates.isDone(env, CompileState.ATTR))
1212 return env;
1213
1214 if (verboseCompilePolicy)
1215 printNote("[attribute " + env.enclClass.sym + "]");
1216 if (verbose)
1217 log.printVerbose("checking.attribution", env.enclClass.sym);
1218
1219 if (!taskListener.isEmpty()) {
1220 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1221 taskListener.started(e);
1222 }
1223
1224 JavaFileObject prev = log.useSource(
1225 env.enclClass.sym.sourcefile != null ?
1226 env.enclClass.sym.sourcefile :
1227 env.toplevel.sourcefile);
1228 try {
1229 attr.attrib(env);
1230 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) {
1231 //if in fail-over mode, ensure that AST expression nodes
1232 //are correctly initialized (e.g. they have a type/symbol)
1233 attr.postAttr(env.tree);
1234 }
1235 compileStates.put(env, CompileState.ATTR);
1236 }
1237 finally {
1238 log.useSource(prev);
1239 }
1240
1241 return env;
1242 }
1243
1244 /**
1245 * Perform dataflow checks on attributed parse trees.
1246 * These include checks for definite assignment and unreachable statements.
1247 * If any errors occur, an empty list will be returned.
1248 * @returns the list of attributed parse trees
1249 */
1250 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) {
1251 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1252 for (Env<AttrContext> env: envs) {
1253 flow(env, results);
1254 }
1255 return stopIfError(CompileState.FLOW, results);
1256 }
1257
1258 /**
1259 * Perform dataflow checks on an attributed parse tree.
1260 */
1261 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) {
1262 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1263 flow(env, results);
1264 return stopIfError(CompileState.FLOW, results);
1265 }
1266
1267 /**
1268 * Perform dataflow checks on an attributed parse tree.
1269 */
1270 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) {
1271 if (compileStates.isDone(env, CompileState.FLOW)) {
1272 results.add(env);
1273 return;
1274 }
1275
1276 try {
1277 if (shouldStop(CompileState.FLOW))
1278 return;
1279
1280 if (relax) {
1281 results.add(env);
1282 return;
1283 }
1284
1285 if (verboseCompilePolicy)
1286 printNote("[flow " + env.enclClass.sym + "]");
1287 JavaFileObject prev = log.useSource(
1288 env.enclClass.sym.sourcefile != null ?
1289 env.enclClass.sym.sourcefile :
1290 env.toplevel.sourcefile);
1291 try {
1292 make.at(Position.FIRSTPOS);
1293 TreeMaker localMake = make.forToplevel(env.toplevel);
1294 flow.analyzeTree(env, localMake);
1295 compileStates.put(env, CompileState.FLOW);
1296
1297 if (shouldStop(CompileState.FLOW))
1298 return;
1299
1300 results.add(env);
1301 }
1302 finally {
1303 log.useSource(prev);
1304 }
1305 }
1306 finally {
1307 if (!taskListener.isEmpty()) {
1308 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1309 taskListener.finished(e);
1310 }
1311 }
1312 }
1313
1314 /**
1315 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1316 * for source or code generation.
1317 * If any errors occur, an empty list will be returned.
1318 * @returns a list containing the classes to be generated
1319 */
1320 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) {
1321 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>();
1322 for (Env<AttrContext> env: envs)
1323 desugar(env, results);
1324 return stopIfError(CompileState.FLOW, results);
1325 }
1326
1327 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs = new HashMap<>();
1328
1329 /**
1330 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1331 * for source or code generation. If the file was not listed on the command line,
1332 * the current implicitSourcePolicy is taken into account.
1333 * The preparation stops as soon as an error is found.
1334 */
1335 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) {
1336 if (shouldStop(CompileState.TRANSTYPES))
1337 return;
1338
1339 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE
1340 && !inputFiles.contains(env.toplevel.sourcefile)) {
1341 return;
1342 }
1343
1344 if (compileStates.isDone(env, CompileState.LOWER)) {
1345 results.addAll(desugaredEnvs.get(env));
1346 return;
1347 }
1348
1349 /**
1350 * Ensure that superclasses of C are desugared before C itself. This is
1351 * required for two reasons: (i) as erasure (TransTypes) destroys
1352 * information needed in flow analysis and (ii) as some checks carried
1353 * out during lowering require that all synthetic fields/methods have
1354 * already been added to C and its superclasses.
1355 */
1356 class ScanNested extends TreeScanner {
1357 Set<Env<AttrContext>> dependencies = new LinkedHashSet<>();
1358 protected boolean hasLambdas;
1359 @Override
1360 public void visitClassDef(JCClassDecl node) {
1361 Type st = types.supertype(node.sym.type);
1362 boolean envForSuperTypeFound = false;
1363 while (!envForSuperTypeFound && st.hasTag(CLASS)) {
1364 ClassSymbol c = st.tsym.outermostClass();
1365 Env<AttrContext> stEnv = enter.getEnv(c);
1366 if (stEnv != null && env != stEnv) {
1367 if (dependencies.add(stEnv)) {
1368 boolean prevHasLambdas = hasLambdas;
1369 try {
1370 scan(stEnv.tree);
1371 } finally {
1372 /*
1373 * ignore any updates to hasLambdas made during
1374 * the nested scan, this ensures an initalized
1375 * LambdaToMethod is available only to those
1376 * classes that contain lambdas
1377 */
1378 hasLambdas = prevHasLambdas;
1379 }
1380 }
1381 envForSuperTypeFound = true;
1382 }
1383 st = types.supertype(st);
1384 }
1385 super.visitClassDef(node);
1386 }
1387 @Override
1388 public void visitLambda(JCLambda tree) {
1389 hasLambdas = true;
1390 super.visitLambda(tree);
1391 }
1392 @Override
1393 public void visitReference(JCMemberReference tree) {
1394 hasLambdas = true;
1395 super.visitReference(tree);
1396 }
1397 }
1398 ScanNested scanner = new ScanNested();
1399 scanner.scan(env.tree);
1400 for (Env<AttrContext> dep: scanner.dependencies) {
1401 if (!compileStates.isDone(dep, CompileState.FLOW))
1402 desugaredEnvs.put(dep, desugar(flow(attribute(dep))));
1403 }
1404
1405 //We need to check for error another time as more classes might
1406 //have been attributed and analyzed at this stage
1407 if (shouldStop(CompileState.TRANSTYPES))
1408 return;
1409
1410 if (verboseCompilePolicy)
1411 printNote("[desugar " + env.enclClass.sym + "]");
1412
1413 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1414 env.enclClass.sym.sourcefile :
1415 env.toplevel.sourcefile);
1416 try {
1417 //save tree prior to rewriting
1418 JCTree untranslated = env.tree;
1419
1420 make.at(Position.FIRSTPOS);
1421 TreeMaker localMake = make.forToplevel(env.toplevel);
1422
1423 if (env.tree.hasTag(JCTree.Tag.PACKAGEDEF)) {
1424 if (!(stubOutput || sourceOutput || printFlat)) {
1425 if (shouldStop(CompileState.LOWER))
1426 return;
1427 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake);
1428 if (pdef.head != null) {
1429 Assert.check(pdef.tail.isEmpty());
1430 results.add(new Pair<>(env, (JCClassDecl)pdef.head));
1431 }
1432 }
1433 return;
1434 }
1435
1436 if (stubOutput) {
1437 //emit stub Java source file, only for compilation
1438 //units enumerated explicitly on the command line
1439 JCClassDecl cdef = (JCClassDecl)env.tree;
1440 if (untranslated instanceof JCClassDecl &&
1441 rootClasses.contains((JCClassDecl)untranslated) &&
1442 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1443 cdef.sym.packge().getQualifiedName() == names.java_lang)) {
1444 results.add(new Pair<>(env, removeMethodBodies(cdef)));
1445 }
1446 return;
1447 }
1448
1449 if (shouldStop(CompileState.TRANSTYPES))
1450 return;
1451
1452 env.tree = transTypes.translateTopLevelClass(env.tree, localMake);
1453 compileStates.put(env, CompileState.TRANSTYPES);
1454
1455 if (source.allowLambda() && scanner.hasLambdas) {
1456 if (shouldStop(CompileState.UNLAMBDA))
1457 return;
1458
1459 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake);
1460 compileStates.put(env, CompileState.UNLAMBDA);
1461 }
1462
1463 if (shouldStop(CompileState.LOWER))
1464 return;
1465
1466 if (sourceOutput) {
1467 //emit standard Java source file, only for compilation
1468 //units enumerated explicitly on the command line
1469 JCClassDecl cdef = (JCClassDecl)env.tree;
1470 if (untranslated instanceof JCClassDecl &&
1471 rootClasses.contains((JCClassDecl)untranslated)) {
1472 results.add(new Pair<>(env, cdef));
1473 }
1474 return;
1475 }
1476
1477 //translate out inner classes
1478 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake);
1479 compileStates.put(env, CompileState.LOWER);
1480
1481 if (shouldStop(CompileState.LOWER))
1482 return;
1483
1484 //generate code for each class
1485 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) {
1486 JCClassDecl cdef = (JCClassDecl)l.head;
1487 results.add(new Pair<>(env, cdef));
1488 }
1489 }
1490 finally {
1491 log.useSource(prev);
1492 }
1493
1494 }
1495
1496 /** Generates the source or class file for a list of classes.
1497 * The decision to generate a source file or a class file is
1498 * based upon the compiler's options.
1499 * Generation stops if an error occurs while writing files.
1500 */
1501 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) {
1502 generate(queue, null);
1503 }
1504
1505 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) {
1506 if (shouldStop(CompileState.GENERATE))
1507 return;
1508
1509 boolean usePrintSource = (stubOutput || sourceOutput || printFlat);
1510
1511 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) {
1512 Env<AttrContext> env = x.fst;
1513 JCClassDecl cdef = x.snd;
1514
1515 if (verboseCompilePolicy) {
1516 printNote("[generate "
1517 + (usePrintSource ? " source" : "code")
1518 + " " + cdef.sym + "]");
1519 }
1520
1521 if (!taskListener.isEmpty()) {
1522 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1523 taskListener.started(e);
1524 }
1525
1526 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1527 env.enclClass.sym.sourcefile :
1528 env.toplevel.sourcefile);
1529 try {
1530 JavaFileObject file;
1531 if (usePrintSource)
1532 file = printSource(env, cdef);
1533 else {
1534 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT)
1535 && jniWriter.needsHeader(cdef.sym)) {
1536 jniWriter.write(cdef.sym);
1537 }
1538 file = genCode(env, cdef);
1539 }
1540 if (results != null && file != null)
1541 results.add(file);
1542 } catch (IOException ex) {
1543 log.error(cdef.pos(), "class.cant.write",
1544 cdef.sym, ex.getMessage());
1545 return;
1546 } finally {
1547 log.useSource(prev);
1548 }
1549
1550 if (!taskListener.isEmpty()) {
1551 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1552 taskListener.finished(e);
1553 }
1554 }
1555 }
1556
1557 // where
1558 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) {
1559 // use a LinkedHashMap to preserve the order of the original list as much as possible
1560 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<>();
1561 for (Env<AttrContext> env: envs) {
1562 Queue<Env<AttrContext>> sublist = map.get(env.toplevel);
1563 if (sublist == null) {
1564 sublist = new ListBuffer<>();
1565 map.put(env.toplevel, sublist);
1566 }
1567 sublist.add(env);
1568 }
1569 return map;
1570 }
1571
1572 JCClassDecl removeMethodBodies(JCClassDecl cdef) {
1573 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0;
1574 class MethodBodyRemover extends TreeTranslator {
1575 @Override
1576 public void visitMethodDef(JCMethodDecl tree) {
1577 tree.mods.flags &= ~Flags.SYNCHRONIZED;
1578 for (JCVariableDecl vd : tree.params)
1579 vd.mods.flags &= ~Flags.FINAL;
1580 tree.body = null;
1581 super.visitMethodDef(tree);
1582 }
1583 @Override
1584 public void visitVarDef(JCVariableDecl tree) {
1585 if (tree.init != null && tree.init.type.constValue() == null)
1586 tree.init = null;
1587 super.visitVarDef(tree);
1588 }
1589 @Override
1590 public void visitClassDef(JCClassDecl tree) {
1591 ListBuffer<JCTree> newdefs = new ListBuffer<>();
1592 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
1593 JCTree t = it.head;
1594 switch (t.getTag()) {
1595 case CLASSDEF:
1596 if (isInterface ||
1597 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1598 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1599 newdefs.append(t);
1600 break;
1601 case METHODDEF:
1602 if (isInterface ||
1603 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1604 ((JCMethodDecl) t).sym.name == names.init ||
1605 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1606 newdefs.append(t);
1607 break;
1608 case VARDEF:
1609 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1610 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1611 newdefs.append(t);
1612 break;
1613 default:
1614 break;
1615 }
1616 }
1617 tree.defs = newdefs.toList();
1618 super.visitClassDef(tree);
1619 }
1620 }
1621 MethodBodyRemover r = new MethodBodyRemover();
1622 return r.translate(cdef);
1623 }
1624
1625 public void reportDeferredDiagnostics() {
1626 if (errorCount() == 0
1627 && annotationProcessingOccurred
1628 && implicitSourceFilesRead
1629 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) {
1630 if (explicitAnnotationProcessingRequested())
1631 log.warning("proc.use.implicit");
1632 else
1633 log.warning("proc.use.proc.or.implicit");
1634 }
1635 chk.reportDeferredDiagnostics();
1636 if (log.compressedOutput) {
1637 log.mandatoryNote(null, "compressed.diags");
1638 }
1639 }
1640
1641 /** Close the compiler, flushing the logs
1642 */
1643 public void close() {
1644 rootClasses = null;
1645 finder = null;
1646 reader = null;
1647 make = null;
1648 writer = null;
1649 enter = null;
1650 if (todo != null)
1651 todo.clear();
1652 todo = null;
1653 parserFactory = null;
1654 syms = null;
1655 source = null;
1656 attr = null;
1657 chk = null;
1658 gen = null;
1659 flow = null;
1660 transTypes = null;
1661 lower = null;
1662 annotate = null;
1663 types = null;
1664
1665 log.flush();
1666 try {
1667 fileManager.flush();
1668 } catch (IOException e) {
1669 throw new Abort(e);
1670 } finally {
1671 if (names != null)
1672 names.dispose();
1673 names = null;
1674
1675 for (Closeable c: closeables) {
1676 try {
1677 c.close();
1678 } catch (IOException e) {
1679 // When javac uses JDK 7 as a baseline, this code would be
1680 // better written to set any/all exceptions from all the
1681 // Closeables as suppressed exceptions on the FatalError
1682 // that is thrown.
1683 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close");
1684 throw new FatalError(msg, e);
1685 }
1686 }
1687 closeables = List.nil();
1688 }
1689 }
1690
1691 protected void printNote(String lines) {
1692 log.printRawLines(Log.WriterKind.NOTICE, lines);
1693 }
1694
1695 /** Print numbers of errors and warnings.
1696 */
1697 public void printCount(String kind, int count) {
1698 if (count != 0) {
1699 String key;
1700 if (count == 1)
1701 key = "count." + kind;
1702 else
1703 key = "count." + kind + ".plural";
1704 log.printLines(WriterKind.ERROR, key, String.valueOf(count));
1705 log.flush(Log.WriterKind.ERROR);
1706 }
1707 }
1708
1709 private static long now() {
1710 return System.currentTimeMillis();
1711 }
1712
1713 private static long elapsed(long then) {
1714 return now() - then;
1715 }
1716
1717 public void newRound() {
1718 inputFiles.clear();
1719 todo.clear();
1720 }
1721 }