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comparison: src/share/classes/com/sun/tools/javac/main/JavaCompiler.java

src/share/classes/com/sun/tools/javac/main/JavaCompiler.java

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1 /*
2 * Copyright (c) 1999, 2013, 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.HashMap;
30 import java.util.HashSet;
31 import java.util.LinkedHashMap;
32 import java.util.LinkedHashSet;
33 import java.util.Map;
34 import java.util.MissingResourceException;
35 import java.util.Queue;
36 import java.util.ResourceBundle;
37 import java.util.Set;
38
39 import javax.annotation.processing.Processor;
40 import javax.lang.model.SourceVersion;
41 import javax.tools.DiagnosticListener;
42 import javax.tools.JavaFileManager;
43 import javax.tools.JavaFileObject;
44 import javax.tools.StandardLocation;
45
46 import static javax.tools.StandardLocation.CLASS_OUTPUT;
47
48 import com.sun.source.util.TaskEvent;
49 import com.sun.tools.javac.api.MultiTaskListener;
50 import com.sun.tools.javac.code.*;
51 import com.sun.tools.javac.code.Lint.LintCategory;
52 import com.sun.tools.javac.code.Symbol.*;
53 import com.sun.tools.javac.comp.*;
54 import com.sun.tools.javac.comp.CompileStates.CompileState;
55 import com.sun.tools.javac.file.JavacFileManager;
56 import com.sun.tools.javac.jvm.*;
57 import com.sun.tools.javac.parser.*;
58 import com.sun.tools.javac.processing.*;
59 import com.sun.tools.javac.tree.*;
60 import com.sun.tools.javac.tree.JCTree.*;
61 import com.sun.tools.javac.util.*;
62 import com.sun.tools.javac.util.Log.WriterKind;
63
64 import static com.sun.tools.javac.code.TypeTag.CLASS;
65 import static com.sun.tools.javac.main.Option.*;
66 import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;
67
68
69 /** This class could be the main entry point for GJC when GJC is used as a
70 * component in a larger software system. It provides operations to
71 * construct a new compiler, and to run a new compiler on a set of source
72 * files.
73 *
74 * <p><b>This is NOT part of any supported API.
75 * If you write code that depends on this, you do so at your own risk.
76 * This code and its internal interfaces are subject to change or
77 * deletion without notice.</b>
78 */
79 public class JavaCompiler {
80 /** The context key for the compiler. */
81 protected static final Context.Key<JavaCompiler> compilerKey =
82 new Context.Key<JavaCompiler>();
83
84 /** Get the JavaCompiler instance for this context. */
85 public static JavaCompiler instance(Context context) {
86 JavaCompiler instance = context.get(compilerKey);
87 if (instance == null)
88 instance = new JavaCompiler(context);
89 return instance;
90 }
91
92 /** The current version number as a string.
93 */
94 public static String version() {
95 return version("release"); // mm.nn.oo[-milestone]
96 }
97
98 /** The current full version number as a string.
99 */
100 public static String fullVersion() {
101 return version("full"); // mm.mm.oo[-milestone]-build
102 }
103
104 private static final String versionRBName = "com.sun.tools.javac.resources.version";
105 private static ResourceBundle versionRB;
106
107 private static String version(String key) {
108 if (versionRB == null) {
109 try {
110 versionRB = ResourceBundle.getBundle(versionRBName);
111 } catch (MissingResourceException e) {
112 return Log.getLocalizedString("version.not.available");
113 }
114 }
115 try {
116 return versionRB.getString(key);
117 }
118 catch (MissingResourceException e) {
119 return Log.getLocalizedString("version.not.available");
120 }
121 }
122
123 /**
124 * Control how the compiler's latter phases (attr, flow, desugar, generate)
125 * are connected. Each individual file is processed by each phase in turn,
126 * but with different compile policies, you can control the order in which
127 * each class is processed through its next phase.
128 *
129 * <p>Generally speaking, the compiler will "fail fast" in the face of
130 * errors, although not aggressively so. flow, desugar, etc become no-ops
131 * once any errors have occurred. No attempt is currently made to determine
132 * if it might be safe to process a class through its next phase because
133 * it does not depend on any unrelated errors that might have occurred.
134 */
135 protected static enum CompilePolicy {
136 /**
137 * Just attribute the parse trees.
138 */
139 ATTR_ONLY,
140
141 /**
142 * Just attribute and do flow analysis on the parse trees.
143 * This should catch most user errors.
144 */
145 CHECK_ONLY,
146
147 /**
148 * Attribute everything, then do flow analysis for everything,
149 * then desugar everything, and only then generate output.
150 * This means no output will be generated if there are any
151 * errors in any classes.
152 */
153 SIMPLE,
154
155 /**
156 * Groups the classes for each source file together, then process
157 * each group in a manner equivalent to the {@code SIMPLE} policy.
158 * This means no output will be generated if there are any
159 * errors in any of the classes in a source file.
160 */
161 BY_FILE,
162
163 /**
164 * Completely process each entry on the todo list in turn.
165 * -- this is the same for 1.5.
166 * Means output might be generated for some classes in a compilation unit
167 * and not others.
168 */
169 BY_TODO;
170
171 static CompilePolicy decode(String option) {
172 if (option == null)
173 return DEFAULT_COMPILE_POLICY;
174 else if (option.equals("attr"))
175 return ATTR_ONLY;
176 else if (option.equals("check"))
177 return CHECK_ONLY;
178 else if (option.equals("simple"))
179 return SIMPLE;
180 else if (option.equals("byfile"))
181 return BY_FILE;
182 else if (option.equals("bytodo"))
183 return BY_TODO;
184 else
185 return DEFAULT_COMPILE_POLICY;
186 }
187 }
188
189 private static final CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO;
190
191 protected static enum ImplicitSourcePolicy {
192 /** Don't generate or process implicitly read source files. */
193 NONE,
194 /** Generate classes for implicitly read source files. */
195 CLASS,
196 /** Like CLASS, but generate warnings if annotation processing occurs */
197 UNSET;
198
199 static ImplicitSourcePolicy decode(String option) {
200 if (option == null)
201 return UNSET;
202 else if (option.equals("none"))
203 return NONE;
204 else if (option.equals("class"))
205 return CLASS;
206 else
207 return UNSET;
208 }
209 }
210
211 /** The log to be used for error reporting.
212 */
213 public Log log;
214
215 /** Factory for creating diagnostic objects
216 */
217 JCDiagnostic.Factory diagFactory;
218
219 /** The tree factory module.
220 */
221 protected TreeMaker make;
222
223 /** The class reader.
224 */
225 protected ClassReader reader;
226
227 /** The class writer.
228 */
229 protected ClassWriter writer;
230
231 /** The native header writer.
232 */
233 protected JNIWriter jniWriter;
234
235 /** The module for the symbol table entry phases.
236 */
237 protected Enter enter;
238
239 /** The symbol table.
240 */
241 protected Symtab syms;
242
243 /** The language version.
244 */
245 protected Source source;
246
247 /** The module for code generation.
248 */
249 protected Gen gen;
250
251 /** The name table.
252 */
253 protected Names names;
254
255 /** The attributor.
256 */
257 protected Attr attr;
258
259 /** The attributor.
260 */
261 protected Check chk;
262
263 /** The flow analyzer.
264 */
265 protected Flow flow;
266
267 /** The type eraser.
268 */
269 protected TransTypes transTypes;
270
271 /** The syntactic sugar desweetener.
272 */
273 protected Lower lower;
274
275 /** The annotation annotator.
276 */
277 protected Annotate annotate;
278
279 /** Force a completion failure on this name
280 */
281 protected final Name completionFailureName;
282
283 /** Type utilities.
284 */
285 protected Types types;
286
287 /** Access to file objects.
288 */
289 protected JavaFileManager fileManager;
290
291 /** Factory for parsers.
292 */
293 protected ParserFactory parserFactory;
294
295 /** Broadcasting listener for progress events
296 */
297 protected MultiTaskListener taskListener;
298
299 /**
300 * Annotation processing may require and provide a new instance
301 * of the compiler to be used for the analyze and generate phases.
302 */
303 protected JavaCompiler delegateCompiler;
304
305 /**
306 * SourceCompleter that delegates to the complete-method of this class.
307 */
308 protected final ClassReader.SourceCompleter thisCompleter =
309 new ClassReader.SourceCompleter() {
310 @Override
311 public void complete(ClassSymbol sym) throws CompletionFailure {
312 JavaCompiler.this.complete(sym);
313 }
314 };
315
316 /**
317 * Command line options.
318 */
319 protected Options options;
320
321 protected Context context;
322
323 /**
324 * Flag set if any annotation processing occurred.
325 **/
326 protected boolean annotationProcessingOccurred;
327
328 /**
329 * Flag set if any implicit source files read.
330 **/
331 protected boolean implicitSourceFilesRead;
332
333 protected CompileStates compileStates;
334
335 /** Construct a new compiler using a shared context.
336 */
337 public JavaCompiler(Context context) {
338 this.context = context;
339 context.put(compilerKey, this);
340
341 // if fileManager not already set, register the JavacFileManager to be used
342 if (context.get(JavaFileManager.class) == null)
343 JavacFileManager.preRegister(context);
344
345 names = Names.instance(context);
346 log = Log.instance(context);
347 diagFactory = JCDiagnostic.Factory.instance(context);
348 reader = ClassReader.instance(context);
349 make = TreeMaker.instance(context);
350 writer = ClassWriter.instance(context);
351 jniWriter = JNIWriter.instance(context);
352 enter = Enter.instance(context);
353 todo = Todo.instance(context);
354
355 fileManager = context.get(JavaFileManager.class);
356 parserFactory = ParserFactory.instance(context);
357 compileStates = CompileStates.instance(context);
358
359 try {
360 // catch completion problems with predefineds
361 syms = Symtab.instance(context);
362 } catch (CompletionFailure ex) {
363 // inlined Check.completionError as it is not initialized yet
364 log.error("cant.access", ex.sym, ex.getDetailValue());
365 if (ex instanceof ClassReader.BadClassFile)
366 throw new Abort();
367 }
368 source = Source.instance(context);
369 Target target = Target.instance(context);
370 attr = Attr.instance(context);
371 chk = Check.instance(context);
372 gen = Gen.instance(context);
373 flow = Flow.instance(context);
374 transTypes = TransTypes.instance(context);
375 lower = Lower.instance(context);
376 annotate = Annotate.instance(context);
377 types = Types.instance(context);
378 taskListener = MultiTaskListener.instance(context);
379
380 reader.sourceCompleter = thisCompleter;
381
382 options = Options.instance(context);
383
384 verbose = options.isSet(VERBOSE);
385 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s
386 stubOutput = options.isSet("-stubs");
387 relax = options.isSet("-relax");
388 printFlat = options.isSet("-printflat");
389 attrParseOnly = options.isSet("-attrparseonly");
390 encoding = options.get(ENCODING);
391 lineDebugInfo = options.isUnset(G_CUSTOM) ||
392 options.isSet(G_CUSTOM, "lines");
393 genEndPos = options.isSet(XJCOV) ||
394 context.get(DiagnosticListener.class) != null;
395 devVerbose = options.isSet("dev");
396 processPcks = options.isSet("process.packages");
397 werror = options.isSet(WERROR);
398
399 if (source.compareTo(Source.DEFAULT) < 0) {
400 if (options.isUnset(XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option)) {
401 if (fileManager instanceof BaseFileManager) {
402 if (((BaseFileManager) fileManager).isDefaultBootClassPath())
403 log.warning(LintCategory.OPTIONS, "source.no.bootclasspath", source.name);
404 }
405 }
406 }
407
408 checkForObsoleteOptions(target);
409
410 verboseCompilePolicy = options.isSet("verboseCompilePolicy");
411
412 if (attrParseOnly)
413 compilePolicy = CompilePolicy.ATTR_ONLY;
414 else
415 compilePolicy = CompilePolicy.decode(options.get("compilePolicy"));
416
417 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit"));
418
419 completionFailureName =
420 options.isSet("failcomplete")
421 ? names.fromString(options.get("failcomplete"))
422 : null;
423
424 shouldStopPolicyIfError =
425 options.isSet("shouldStopPolicy") // backwards compatible
426 ? CompileState.valueOf(options.get("shouldStopPolicy"))
427 : options.isSet("shouldStopPolicyIfError")
428 ? CompileState.valueOf(options.get("shouldStopPolicyIfError"))
429 : CompileState.INIT;
430 shouldStopPolicyIfNoError =
431 options.isSet("shouldStopPolicyIfNoError")
432 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError"))
433 : CompileState.GENERATE;
434
435 if (options.isUnset("oldDiags"))
436 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context));
437 }
438
439 private void checkForObsoleteOptions(Target target) {
440 // Unless lint checking on options is disabled, check for
441 // obsolete source and target options.
442 boolean obsoleteOptionFound = false;
443 if (options.isUnset(XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option)) {
444 if (source.compareTo(Source.JDK1_5) <= 0) {
445 log.warning(LintCategory.OPTIONS, "option.obsolete.source", source.name);
446 obsoleteOptionFound = true;
447 }
448
449 if (target.compareTo(Target.JDK1_5) <= 0) {
450 log.warning(LintCategory.OPTIONS, "option.obsolete.target", target.name);
451 obsoleteOptionFound = true;
452 }
453
454 if (obsoleteOptionFound)
455 log.warning(LintCategory.OPTIONS, "option.obsolete.suppression");
456 }
457 }
458
459 /* Switches:
460 */
461
462 /** Verbose output.
463 */
464 public boolean verbose;
465
466 /** Emit plain Java source files rather than class files.
467 */
468 public boolean sourceOutput;
469
470 /** Emit stub source files rather than class files.
471 */
472 public boolean stubOutput;
473
474 /** Generate attributed parse tree only.
475 */
476 public boolean attrParseOnly;
477
478 /** Switch: relax some constraints for producing the jsr14 prototype.
479 */
480 boolean relax;
481
482 /** Debug switch: Emit Java sources after inner class flattening.
483 */
484 public boolean printFlat;
485
486 /** The encoding to be used for source input.
487 */
488 public String encoding;
489
490 /** Generate code with the LineNumberTable attribute for debugging
491 */
492 public boolean lineDebugInfo;
493
494 /** Switch: should we store the ending positions?
495 */
496 public boolean genEndPos;
497
498 /** Switch: should we debug ignored exceptions
499 */
500 protected boolean devVerbose;
501
502 /** Switch: should we (annotation) process packages as well
503 */
504 protected boolean processPcks;
505
506 /** Switch: treat warnings as errors
507 */
508 protected boolean werror;
509
510 /** Switch: is annotation processing requested explicitly via
511 * CompilationTask.setProcessors?
512 */
513 protected boolean explicitAnnotationProcessingRequested = false;
514
515 /**
516 * The policy for the order in which to perform the compilation
517 */
518 protected CompilePolicy compilePolicy;
519
520 /**
521 * The policy for what to do with implicitly read source files
522 */
523 protected ImplicitSourcePolicy implicitSourcePolicy;
524
525 /**
526 * Report activity related to compilePolicy
527 */
528 public boolean verboseCompilePolicy;
529
530 /**
531 * Policy of how far to continue compilation after errors have occurred.
532 * Set this to minimum CompileState (INIT) to stop as soon as possible
533 * after errors.
534 */
535 public CompileState shouldStopPolicyIfError;
536
537 /**
538 * Policy of how far to continue compilation when no errors have occurred.
539 * Set this to maximum CompileState (GENERATE) to perform full compilation.
540 * Set this lower to perform partial compilation, such as -proc:only.
541 */
542 public CompileState shouldStopPolicyIfNoError;
543
544 /** A queue of all as yet unattributed classes.
545 */
546 public Todo todo;
547
548 /** A list of items to be closed when the compilation is complete.
549 */
550 public List<Closeable> closeables = List.nil();
551
552 /** The set of currently compiled inputfiles, needed to ensure
553 * we don't accidentally overwrite an input file when -s is set.
554 * initialized by `compile'.
555 */
556 protected Set<JavaFileObject> inputFiles = new HashSet<JavaFileObject>();
557
558 protected boolean shouldStop(CompileState cs) {
559 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError())
560 ? shouldStopPolicyIfError
561 : shouldStopPolicyIfNoError;
562 return cs.isAfter(shouldStopPolicy);
563 }
564
565 /** The number of errors reported so far.
566 */
567 public int errorCount() {
568 if (delegateCompiler != null && delegateCompiler != this)
569 return delegateCompiler.errorCount();
570 else {
571 if (werror && log.nerrors == 0 && log.nwarnings > 0) {
572 log.error("warnings.and.werror");
573 }
574 }
575 return log.nerrors;
576 }
577
578 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) {
579 return shouldStop(cs) ? new ListBuffer<T>() : queue;
580 }
581
582 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) {
583 return shouldStop(cs) ? List.<T>nil() : list;
584 }
585
586 /** The number of warnings reported so far.
587 */
588 public int warningCount() {
589 if (delegateCompiler != null && delegateCompiler != this)
590 return delegateCompiler.warningCount();
591 else
592 return log.nwarnings;
593 }
594
595 /** Try to open input stream with given name.
596 * Report an error if this fails.
597 * @param filename The file name of the input stream to be opened.
598 */
599 public CharSequence readSource(JavaFileObject filename) {
600 try {
601 inputFiles.add(filename);
602 return filename.getCharContent(false);
603 } catch (IOException e) {
604 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
605 return null;
606 }
607 }
608
609 /** Parse contents of input stream.
610 * @param filename The name of the file from which input stream comes.
611 * @param content The characters to be parsed.
612 */
613 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) {
614 long msec = now();
615 JCCompilationUnit tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(),
616 null, List.<JCTree>nil());
617 if (content != null) {
618 if (verbose) {
619 log.printVerbose("parsing.started", filename);
620 }
621 if (!taskListener.isEmpty()) {
622 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename);
623 taskListener.started(e);
624 keepComments = true;
625 genEndPos = true;
626 }
627 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo);
628 tree = parser.parseCompilationUnit();
629 if (verbose) {
630 log.printVerbose("parsing.done", Long.toString(elapsed(msec)));
631 }
632 }
633
634 tree.sourcefile = filename;
635
636 if (content != null && !taskListener.isEmpty()) {
637 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree);
638 taskListener.finished(e);
639 }
640
641 return tree;
642 }
643 // where
644 public boolean keepComments = false;
645 protected boolean keepComments() {
646 return keepComments || sourceOutput || stubOutput;
647 }
648
649
650 /** Parse contents of file.
651 * @param filename The name of the file to be parsed.
652 */
653 @Deprecated
654 public JCTree.JCCompilationUnit parse(String filename) {
655 JavacFileManager fm = (JavacFileManager)fileManager;
656 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next());
657 }
658
659 /** Parse contents of file.
660 * @param filename The name of the file to be parsed.
661 */
662 public JCTree.JCCompilationUnit parse(JavaFileObject filename) {
663 JavaFileObject prev = log.useSource(filename);
664 try {
665 JCTree.JCCompilationUnit t = parse(filename, readSource(filename));
666 if (t.endPositions != null)
667 log.setEndPosTable(filename, t.endPositions);
668 return t;
669 } finally {
670 log.useSource(prev);
671 }
672 }
673
674 /** Resolve an identifier which may be the binary name of a class or
675 * the Java name of a class or package.
676 * @param name The name to resolve
677 */
678 public Symbol resolveBinaryNameOrIdent(String name) {
679 try {
680 Name flatname = names.fromString(name.replace("/", "."));
681 return reader.loadClass(flatname);
682 } catch (CompletionFailure ignore) {
683 return resolveIdent(name);
684 }
685 }
686
687 /** Resolve an identifier.
688 * @param name The identifier to resolve
689 */
690 public Symbol resolveIdent(String name) {
691 if (name.equals(""))
692 return syms.errSymbol;
693 JavaFileObject prev = log.useSource(null);
694 try {
695 JCExpression tree = null;
696 for (String s : name.split("\\.", -1)) {
697 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords
698 return syms.errSymbol;
699 tree = (tree == null) ? make.Ident(names.fromString(s))
700 : make.Select(tree, names.fromString(s));
701 }
702 JCCompilationUnit toplevel =
703 make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
704 toplevel.packge = syms.unnamedPackage;
705 return attr.attribIdent(tree, toplevel);
706 } finally {
707 log.useSource(prev);
708 }
709 }
710
711 /** Emit plain Java source for a class.
712 * @param env The attribution environment of the outermost class
713 * containing this class.
714 * @param cdef The class definition to be printed.
715 */
716 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
717 JavaFileObject outFile
718 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
719 cdef.sym.flatname.toString(),
720 JavaFileObject.Kind.SOURCE,
721 null);
722 if (inputFiles.contains(outFile)) {
723 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile);
724 return null;
725 } else {
726 BufferedWriter out = new BufferedWriter(outFile.openWriter());
727 try {
728 new Pretty(out, true).printUnit(env.toplevel, cdef);
729 if (verbose)
730 log.printVerbose("wrote.file", outFile);
731 } finally {
732 out.close();
733 }
734 return outFile;
735 }
736 }
737
738 /** Generate code and emit a class file for a given class
739 * @param env The attribution environment of the outermost class
740 * containing this class.
741 * @param cdef The class definition from which code is generated.
742 */
743 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
744 try {
745 if (gen.genClass(env, cdef) && (errorCount() == 0))
746 return writer.writeClass(cdef.sym);
747 } catch (ClassWriter.PoolOverflow ex) {
748 log.error(cdef.pos(), "limit.pool");
749 } catch (ClassWriter.StringOverflow ex) {
750 log.error(cdef.pos(), "limit.string.overflow",
751 ex.value.substring(0, 20));
752 } catch (CompletionFailure ex) {
753 chk.completionError(cdef.pos(), ex);
754 }
755 return null;
756 }
757
758 /** Complete compiling a source file that has been accessed
759 * by the class file reader.
760 * @param c The class the source file of which needs to be compiled.
761 */
762 public void complete(ClassSymbol c) throws CompletionFailure {
763 // System.err.println("completing " + c);//DEBUG
764 if (completionFailureName == c.fullname) {
765 throw new CompletionFailure(c, "user-selected completion failure by class name");
766 }
767 JCCompilationUnit tree;
768 JavaFileObject filename = c.classfile;
769 JavaFileObject prev = log.useSource(filename);
770
771 try {
772 tree = parse(filename, filename.getCharContent(false));
773 } catch (IOException e) {
774 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
775 tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
776 } finally {
777 log.useSource(prev);
778 }
779
780 if (!taskListener.isEmpty()) {
781 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
782 taskListener.started(e);
783 }
784
785 enter.complete(List.of(tree), c);
786
787 if (!taskListener.isEmpty()) {
788 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
789 taskListener.finished(e);
790 }
791
792 if (enter.getEnv(c) == null) {
793 boolean isPkgInfo =
794 tree.sourcefile.isNameCompatible("package-info",
795 JavaFileObject.Kind.SOURCE);
796 if (isPkgInfo) {
797 if (enter.getEnv(tree.packge) == null) {
798 JCDiagnostic diag =
799 diagFactory.fragment("file.does.not.contain.package",
800 c.location());
801 throw reader.new BadClassFile(c, filename, diag);
802 }
803 } else {
804 JCDiagnostic diag =
805 diagFactory.fragment("file.doesnt.contain.class",
806 c.getQualifiedName());
807 throw reader.new BadClassFile(c, filename, diag);
808 }
809 }
810
811 implicitSourceFilesRead = true;
812 }
813
814 /** Track when the JavaCompiler has been used to compile something. */
815 private boolean hasBeenUsed = false;
816 private long start_msec = 0;
817 public long elapsed_msec = 0;
818
819 public void compile(List<JavaFileObject> sourceFileObject)
820 throws Throwable {
821 compile(sourceFileObject, List.<String>nil(), null);
822 }
823
824 /**
825 * Main method: compile a list of files, return all compiled classes
826 *
827 * @param sourceFileObjects file objects to be compiled
828 * @param classnames class names to process for annotations
829 * @param processors user provided annotation processors to bypass
830 * discovery, {@code null} means that no processors were provided
831 */
832 public void compile(List<JavaFileObject> sourceFileObjects,
833 List<String> classnames,
834 Iterable<? extends Processor> processors)
835 {
836 if (processors != null && processors.iterator().hasNext())
837 explicitAnnotationProcessingRequested = true;
838 // as a JavaCompiler can only be used once, throw an exception if
839 // it has been used before.
840 if (hasBeenUsed)
841 throw new AssertionError("attempt to reuse JavaCompiler");
842 hasBeenUsed = true;
843
844 // forcibly set the equivalent of -Xlint:-options, so that no further
845 // warnings about command line options are generated from this point on
846 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true");
847 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option);
848
849 start_msec = now();
850
851 try {
852 initProcessAnnotations(processors);
853
854 // These method calls must be chained to avoid memory leaks
855 delegateCompiler =
856 processAnnotations(
857 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))),
858 classnames);
859
860 delegateCompiler.compile2();
861 delegateCompiler.close();
862 elapsed_msec = delegateCompiler.elapsed_msec;
863 } catch (Abort ex) {
864 if (devVerbose)
865 ex.printStackTrace(System.err);
866 } finally {
867 if (procEnvImpl != null)
868 procEnvImpl.close();
869 }
870 }
871
872 /**
873 * The phases following annotation processing: attribution,
874 * desugar, and finally code generation.
875 */
876 private void compile2() {
877 try {
878 switch (compilePolicy) {
879 case ATTR_ONLY:
880 attribute(todo);
881 break;
882
883 case CHECK_ONLY:
884 flow(attribute(todo));
885 break;
886
887 case SIMPLE:
888 generate(desugar(flow(attribute(todo))));
889 break;
890
891 case BY_FILE: {
892 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile();
893 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) {
894 generate(desugar(flow(attribute(q.remove()))));
895 }
896 }
897 break;
898
899 case BY_TODO:
900 while (!todo.isEmpty())
901 generate(desugar(flow(attribute(todo.remove()))));
902 break;
903
904 default:
905 Assert.error("unknown compile policy");
906 }
907 } catch (Abort ex) {
908 if (devVerbose)
909 ex.printStackTrace(System.err);
910 }
911
912 if (verbose) {
913 elapsed_msec = elapsed(start_msec);
914 log.printVerbose("total", Long.toString(elapsed_msec));
915 }
916
917 reportDeferredDiagnostics();
918
919 if (!log.hasDiagnosticListener()) {
920 printCount("error", errorCount());
921 printCount("warn", warningCount());
922 }
923 }
924
925 /**
926 * Set needRootClasses to true, in JavaCompiler subclass constructor
927 * that want to collect public apis of classes supplied on the command line.
928 */
929 protected boolean needRootClasses = false;
930
931 /**
932 * The list of classes explicitly supplied on the command line for compilation.
933 * Not always populated.
934 */
935 private List<JCClassDecl> rootClasses;
936
937 /**
938 * Parses a list of files.
939 */
940 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) {
941 if (shouldStop(CompileState.PARSE))
942 return List.nil();
943
944 //parse all files
945 ListBuffer<JCCompilationUnit> trees = new ListBuffer<>();
946 Set<JavaFileObject> filesSoFar = new HashSet<JavaFileObject>();
947 for (JavaFileObject fileObject : fileObjects) {
948 if (!filesSoFar.contains(fileObject)) {
949 filesSoFar.add(fileObject);
950 trees.append(parse(fileObject));
951 }
952 }
953 return trees.toList();
954 }
955
956 /**
957 * Enter the symbols found in a list of parse trees if the compilation
958 * is expected to proceed beyond anno processing into attr.
959 * As a side-effect, this puts elements on the "todo" list.
960 * Also stores a list of all top level classes in rootClasses.
961 */
962 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) {
963 if (shouldStop(CompileState.ATTR))
964 return List.nil();
965 return enterTrees(roots);
966 }
967
968 /**
969 * Enter the symbols found in a list of parse trees.
970 * As a side-effect, this puts elements on the "todo" list.
971 * Also stores a list of all top level classes in rootClasses.
972 */
973 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) {
974 //enter symbols for all files
975 if (!taskListener.isEmpty()) {
976 for (JCCompilationUnit unit: roots) {
977 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
978 taskListener.started(e);
979 }
980 }
981
982 enter.main(roots);
983
984 if (!taskListener.isEmpty()) {
985 for (JCCompilationUnit unit: roots) {
986 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
987 taskListener.finished(e);
988 }
989 }
990
991 // If generating source, or if tracking public apis,
992 // then remember the classes declared in
993 // the original compilation units listed on the command line.
994 if (needRootClasses || sourceOutput || stubOutput) {
995 ListBuffer<JCClassDecl> cdefs = new ListBuffer<>();
996 for (JCCompilationUnit unit : roots) {
997 for (List<JCTree> defs = unit.defs;
998 defs.nonEmpty();
999 defs = defs.tail) {
1000 if (defs.head instanceof JCClassDecl)
1001 cdefs.append((JCClassDecl)defs.head);
1002 }
1003 }
1004 rootClasses = cdefs.toList();
1005 }
1006
1007 // Ensure the input files have been recorded. Although this is normally
1008 // done by readSource, it may not have been done if the trees were read
1009 // in a prior round of annotation processing, and the trees have been
1010 // cleaned and are being reused.
1011 for (JCCompilationUnit unit : roots) {
1012 inputFiles.add(unit.sourcefile);
1013 }
1014
1015 return roots;
1016 }
1017
1018 /**
1019 * Set to true to enable skeleton annotation processing code.
1020 * Currently, we assume this variable will be replaced more
1021 * advanced logic to figure out if annotation processing is
1022 * needed.
1023 */
1024 boolean processAnnotations = false;
1025
1026 Log.DeferredDiagnosticHandler deferredDiagnosticHandler;
1027
1028 /**
1029 * Object to handle annotation processing.
1030 */
1031 private JavacProcessingEnvironment procEnvImpl = null;
1032
1033 /**
1034 * Check if we should process annotations.
1035 * If so, and if no scanner is yet registered, then set up the DocCommentScanner
1036 * to catch doc comments, and set keepComments so the parser records them in
1037 * the compilation unit.
1038 *
1039 * @param processors user provided annotation processors to bypass
1040 * discovery, {@code null} means that no processors were provided
1041 */
1042 public void initProcessAnnotations(Iterable<? extends Processor> processors) {
1043 // Process annotations if processing is not disabled and there
1044 // is at least one Processor available.
1045 if (options.isSet(PROC, "none")) {
1046 processAnnotations = false;
1047 } else if (procEnvImpl == null) {
1048 procEnvImpl = JavacProcessingEnvironment.instance(context);
1049 procEnvImpl.setProcessors(processors);
1050 processAnnotations = procEnvImpl.atLeastOneProcessor();
1051
1052 if (processAnnotations) {
1053 options.put("save-parameter-names", "save-parameter-names");
1054 reader.saveParameterNames = true;
1055 keepComments = true;
1056 genEndPos = true;
1057 if (!taskListener.isEmpty())
1058 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
1059 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log);
1060 } else { // free resources
1061 procEnvImpl.close();
1062 }
1063 }
1064 }
1065
1066 // TODO: called by JavacTaskImpl
1067 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots) {
1068 return processAnnotations(roots, List.<String>nil());
1069 }
1070
1071 /**
1072 * Process any annotations found in the specified compilation units.
1073 * @param roots a list of compilation units
1074 * @return an instance of the compiler in which to complete the compilation
1075 */
1076 // Implementation note: when this method is called, log.deferredDiagnostics
1077 // will have been set true by initProcessAnnotations, meaning that any diagnostics
1078 // that are reported will go into the log.deferredDiagnostics queue.
1079 // By the time this method exits, log.deferDiagnostics must be set back to false,
1080 // and all deferredDiagnostics must have been handled: i.e. either reported
1081 // or determined to be transient, and therefore suppressed.
1082 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots,
1083 List<String> classnames) {
1084 if (shouldStop(CompileState.PROCESS)) {
1085 // Errors were encountered.
1086 // Unless all the errors are resolve errors, the errors were parse errors
1087 // or other errors during enter which cannot be fixed by running
1088 // any annotation processors.
1089 if (unrecoverableError()) {
1090 deferredDiagnosticHandler.reportDeferredDiagnostics();
1091 log.popDiagnosticHandler(deferredDiagnosticHandler);
1092 return this;
1093 }
1094 }
1095
1096 // ASSERT: processAnnotations and procEnvImpl should have been set up by
1097 // by initProcessAnnotations
1098
1099 // NOTE: The !classnames.isEmpty() checks should be refactored to Main.
1100
1101 if (!processAnnotations) {
1102 // If there are no annotation processors present, and
1103 // annotation processing is to occur with compilation,
1104 // emit a warning.
1105 if (options.isSet(PROC, "only")) {
1106 log.warning("proc.proc-only.requested.no.procs");
1107 todo.clear();
1108 }
1109 // If not processing annotations, classnames must be empty
1110 if (!classnames.isEmpty()) {
1111 log.error("proc.no.explicit.annotation.processing.requested",
1112 classnames);
1113 }
1114 Assert.checkNull(deferredDiagnosticHandler);
1115 return this; // continue regular compilation
1116 }
1117
1118 Assert.checkNonNull(deferredDiagnosticHandler);
1119
1120 try {
1121 List<ClassSymbol> classSymbols = List.nil();
1122 List<PackageSymbol> pckSymbols = List.nil();
1123 if (!classnames.isEmpty()) {
1124 // Check for explicit request for annotation
1125 // processing
1126 if (!explicitAnnotationProcessingRequested()) {
1127 log.error("proc.no.explicit.annotation.processing.requested",
1128 classnames);
1129 deferredDiagnosticHandler.reportDeferredDiagnostics();
1130 log.popDiagnosticHandler(deferredDiagnosticHandler);
1131 return this; // TODO: Will this halt compilation?
1132 } else {
1133 boolean errors = false;
1134 for (String nameStr : classnames) {
1135 Symbol sym = resolveBinaryNameOrIdent(nameStr);
1136 if (sym == null ||
1137 (sym.kind == Kinds.PCK && !processPcks) ||
1138 sym.kind == Kinds.ABSENT_TYP) {
1139 log.error("proc.cant.find.class", nameStr);
1140 errors = true;
1141 continue;
1142 }
1143 try {
1144 if (sym.kind == Kinds.PCK)
1145 sym.complete();
1146 if (sym.exists()) {
1147 if (sym.kind == Kinds.PCK)
1148 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1149 else
1150 classSymbols = classSymbols.prepend((ClassSymbol)sym);
1151 continue;
1152 }
1153 Assert.check(sym.kind == Kinds.PCK);
1154 log.warning("proc.package.does.not.exist", nameStr);
1155 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1156 } catch (CompletionFailure e) {
1157 log.error("proc.cant.find.class", nameStr);
1158 errors = true;
1159 continue;
1160 }
1161 }
1162 if (errors) {
1163 deferredDiagnosticHandler.reportDeferredDiagnostics();
1164 log.popDiagnosticHandler(deferredDiagnosticHandler);
1165 return this;
1166 }
1167 }
1168 }
1169 try {
1170 JavaCompiler c = procEnvImpl.doProcessing(context, roots, classSymbols, pckSymbols,
1171 deferredDiagnosticHandler);
1172 if (c != this)
1173 annotationProcessingOccurred = c.annotationProcessingOccurred = true;
1174 // doProcessing will have handled deferred diagnostics
1175 return c;
1176 } finally {
1177 procEnvImpl.close();
1178 }
1179 } catch (CompletionFailure ex) {
1180 log.error("cant.access", ex.sym, ex.getDetailValue());
1181 deferredDiagnosticHandler.reportDeferredDiagnostics();
1182 log.popDiagnosticHandler(deferredDiagnosticHandler);
1183 return this;
1184 }
1185 }
1186
1187 private boolean unrecoverableError() {
1188 if (deferredDiagnosticHandler != null) {
1189 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) {
1190 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE))
1191 return true;
1192 }
1193 }
1194 return false;
1195 }
1196
1197 boolean explicitAnnotationProcessingRequested() {
1198 return
1199 explicitAnnotationProcessingRequested ||
1200 explicitAnnotationProcessingRequested(options);
1201 }
1202
1203 static boolean explicitAnnotationProcessingRequested(Options options) {
1204 return
1205 options.isSet(PROCESSOR) ||
1206 options.isSet(PROCESSORPATH) ||
1207 options.isSet(PROC, "only") ||
1208 options.isSet(XPRINT);
1209 }
1210
1211 /**
1212 * Attribute a list of parse trees, such as found on the "todo" list.
1213 * Note that attributing classes may cause additional files to be
1214 * parsed and entered via the SourceCompleter.
1215 * Attribution of the entries in the list does not stop if any errors occur.
1216 * @returns a list of environments for attributd classes.
1217 */
1218 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) {
1219 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1220 while (!envs.isEmpty())
1221 results.append(attribute(envs.remove()));
1222 return stopIfError(CompileState.ATTR, results);
1223 }
1224
1225 /**
1226 * Attribute a parse tree.
1227 * @returns the attributed parse tree
1228 */
1229 public Env<AttrContext> attribute(Env<AttrContext> env) {
1230 if (compileStates.isDone(env, CompileState.ATTR))
1231 return env;
1232
1233 if (verboseCompilePolicy)
1234 printNote("[attribute " + env.enclClass.sym + "]");
1235 if (verbose)
1236 log.printVerbose("checking.attribution", env.enclClass.sym);
1237
1238 if (!taskListener.isEmpty()) {
1239 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1240 taskListener.started(e);
1241 }
1242
1243 JavaFileObject prev = log.useSource(
1244 env.enclClass.sym.sourcefile != null ?
1245 env.enclClass.sym.sourcefile :
1246 env.toplevel.sourcefile);
1247 try {
1248 attr.attrib(env);
1249 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) {
1250 //if in fail-over mode, ensure that AST expression nodes
1251 //are correctly initialized (e.g. they have a type/symbol)
1252 attr.postAttr(env.tree);
1253 }
1254 compileStates.put(env, CompileState.ATTR);
1255 if (rootClasses != null && rootClasses.contains(env.enclClass)) {
1256 // This was a class that was explicitly supplied for compilation.
1257 // If we want to capture the public api of this class,
1258 // then now is a good time to do it.
1259 reportPublicApi(env.enclClass.sym);
1260 }
1261 }
1262 finally {
1263 log.useSource(prev);
1264 }
1265
1266 return env;
1267 }
1268
1269 /** Report the public api of a class that was supplied explicitly for compilation,
1270 * for example on the command line to javac.
1271 * @param sym The symbol of the class.
1272 */
1273 public void reportPublicApi(ClassSymbol sym) {
1274 // Override to collect the reported public api.
1275 }
1276
1277 /**
1278 * Perform dataflow checks on attributed parse trees.
1279 * These include checks for definite assignment and unreachable statements.
1280 * If any errors occur, an empty list will be returned.
1281 * @returns the list of attributed parse trees
1282 */
1283 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) {
1284 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1285 for (Env<AttrContext> env: envs) {
1286 flow(env, results);
1287 }
1288 return stopIfError(CompileState.FLOW, results);
1289 }
1290
1291 /**
1292 * Perform dataflow checks on an attributed parse tree.
1293 */
1294 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) {
1295 ListBuffer<Env<AttrContext>> results = new ListBuffer<>();
1296 flow(env, results);
1297 return stopIfError(CompileState.FLOW, results);
1298 }
1299
1300 /**
1301 * Perform dataflow checks on an attributed parse tree.
1302 */
1303 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) {
1304 if (compileStates.isDone(env, CompileState.FLOW)) {
1305 results.add(env);
1306 return;
1307 }
1308
1309 try {
1310 if (shouldStop(CompileState.FLOW))
1311 return;
1312
1313 if (relax) {
1314 results.add(env);
1315 return;
1316 }
1317
1318 if (verboseCompilePolicy)
1319 printNote("[flow " + env.enclClass.sym + "]");
1320 JavaFileObject prev = log.useSource(
1321 env.enclClass.sym.sourcefile != null ?
1322 env.enclClass.sym.sourcefile :
1323 env.toplevel.sourcefile);
1324 try {
1325 make.at(Position.FIRSTPOS);
1326 TreeMaker localMake = make.forToplevel(env.toplevel);
1327 flow.analyzeTree(env, localMake);
1328 compileStates.put(env, CompileState.FLOW);
1329
1330 if (shouldStop(CompileState.FLOW))
1331 return;
1332
1333 results.add(env);
1334 }
1335 finally {
1336 log.useSource(prev);
1337 }
1338 }
1339 finally {
1340 if (!taskListener.isEmpty()) {
1341 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1342 taskListener.finished(e);
1343 }
1344 }
1345 }
1346
1347 /**
1348 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1349 * for source or code generation.
1350 * If any errors occur, an empty list will be returned.
1351 * @returns a list containing the classes to be generated
1352 */
1353 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) {
1354 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = new ListBuffer<>();
1355 for (Env<AttrContext> env: envs)
1356 desugar(env, results);
1357 return stopIfError(CompileState.FLOW, results);
1358 }
1359
1360 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs =
1361 new HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>>();
1362
1363 /**
1364 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1365 * for source or code generation. If the file was not listed on the command line,
1366 * the current implicitSourcePolicy is taken into account.
1367 * The preparation stops as soon as an error is found.
1368 */
1369 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) {
1370 if (shouldStop(CompileState.TRANSTYPES))
1371 return;
1372
1373 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE
1374 && !inputFiles.contains(env.toplevel.sourcefile)) {
1375 return;
1376 }
1377
1378 if (compileStates.isDone(env, CompileState.LOWER)) {
1379 results.addAll(desugaredEnvs.get(env));
1380 return;
1381 }
1382
1383 /**
1384 * Ensure that superclasses of C are desugared before C itself. This is
1385 * required for two reasons: (i) as erasure (TransTypes) destroys
1386 * information needed in flow analysis and (ii) as some checks carried
1387 * out during lowering require that all synthetic fields/methods have
1388 * already been added to C and its superclasses.
1389 */
1390 class ScanNested extends TreeScanner {
1391 Set<Env<AttrContext>> dependencies = new LinkedHashSet<Env<AttrContext>>();
1392 protected boolean hasLambdas;
1393 @Override
1394 public void visitClassDef(JCClassDecl node) {
1395 Type st = types.supertype(node.sym.type);
1396 boolean envForSuperTypeFound = false;
1397 while (!envForSuperTypeFound && st.hasTag(CLASS)) {
1398 ClassSymbol c = st.tsym.outermostClass();
1399 Env<AttrContext> stEnv = enter.getEnv(c);
1400 if (stEnv != null && env != stEnv) {
1401 if (dependencies.add(stEnv)) {
1402 boolean prevHasLambdas = hasLambdas;
1403 try {
1404 scan(stEnv.tree);
1405 } finally {
1406 /*
1407 * ignore any updates to hasLambdas made during
1408 * the nested scan, this ensures an initalized
1409 * LambdaToMethod is available only to those
1410 * classes that contain lambdas
1411 */
1412 hasLambdas = prevHasLambdas;
1413 }
1414 }
1415 envForSuperTypeFound = true;
1416 }
1417 st = types.supertype(st);
1418 }
1419 super.visitClassDef(node);
1420 }
1421 @Override
1422 public void visitLambda(JCLambda tree) {
1423 hasLambdas = true;
1424 super.visitLambda(tree);
1425 }
1426 @Override
1427 public void visitReference(JCMemberReference tree) {
1428 hasLambdas = true;
1429 super.visitReference(tree);
1430 }
1431 }
1432 ScanNested scanner = new ScanNested();
1433 scanner.scan(env.tree);
1434 for (Env<AttrContext> dep: scanner.dependencies) {
1435 if (!compileStates.isDone(dep, CompileState.FLOW))
1436 desugaredEnvs.put(dep, desugar(flow(attribute(dep))));
1437 }
1438
1439 //We need to check for error another time as more classes might
1440 //have been attributed and analyzed at this stage
1441 if (shouldStop(CompileState.TRANSTYPES))
1442 return;
1443
1444 if (verboseCompilePolicy)
1445 printNote("[desugar " + env.enclClass.sym + "]");
1446
1447 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1448 env.enclClass.sym.sourcefile :
1449 env.toplevel.sourcefile);
1450 try {
1451 //save tree prior to rewriting
1452 JCTree untranslated = env.tree;
1453
1454 make.at(Position.FIRSTPOS);
1455 TreeMaker localMake = make.forToplevel(env.toplevel);
1456
1457 if (env.tree instanceof JCCompilationUnit) {
1458 if (!(stubOutput || sourceOutput || printFlat)) {
1459 if (shouldStop(CompileState.LOWER))
1460 return;
1461 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake);
1462 if (pdef.head != null) {
1463 Assert.check(pdef.tail.isEmpty());
1464 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, (JCClassDecl)pdef.head));
1465 }
1466 }
1467 return;
1468 }
1469
1470 if (stubOutput) {
1471 //emit stub Java source file, only for compilation
1472 //units enumerated explicitly on the command line
1473 JCClassDecl cdef = (JCClassDecl)env.tree;
1474 if (untranslated instanceof JCClassDecl &&
1475 rootClasses.contains((JCClassDecl)untranslated) &&
1476 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1477 cdef.sym.packge().getQualifiedName() == names.java_lang)) {
1478 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, removeMethodBodies(cdef)));
1479 }
1480 return;
1481 }
1482
1483 if (shouldStop(CompileState.TRANSTYPES))
1484 return;
1485
1486 env.tree = transTypes.translateTopLevelClass(env.tree, localMake);
1487 compileStates.put(env, CompileState.TRANSTYPES);
1488
1489 if (source.allowLambda() && scanner.hasLambdas) {
1490 if (shouldStop(CompileState.UNLAMBDA))
1491 return;
1492
1493 env.tree = LambdaToMethod.instance(context).translateTopLevelClass(env, env.tree, localMake);
1494 compileStates.put(env, CompileState.UNLAMBDA);
1495 }
1496
1497 if (shouldStop(CompileState.LOWER))
1498 return;
1499
1500 if (sourceOutput) {
1501 //emit standard Java source file, only for compilation
1502 //units enumerated explicitly on the command line
1503 JCClassDecl cdef = (JCClassDecl)env.tree;
1504 if (untranslated instanceof JCClassDecl &&
1505 rootClasses.contains((JCClassDecl)untranslated)) {
1506 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1507 }
1508 return;
1509 }
1510
1511 //translate out inner classes
1512 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake);
1513 compileStates.put(env, CompileState.LOWER);
1514
1515 if (shouldStop(CompileState.LOWER))
1516 return;
1517
1518 //generate code for each class
1519 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) {
1520 JCClassDecl cdef = (JCClassDecl)l.head;
1521 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1522 }
1523 }
1524 finally {
1525 log.useSource(prev);
1526 }
1527
1528 }
1529
1530 /** Generates the source or class file for a list of classes.
1531 * The decision to generate a source file or a class file is
1532 * based upon the compiler's options.
1533 * Generation stops if an error occurs while writing files.
1534 */
1535 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) {
1536 generate(queue, null);
1537 }
1538
1539 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) {
1540 if (shouldStop(CompileState.GENERATE))
1541 return;
1542
1543 boolean usePrintSource = (stubOutput || sourceOutput || printFlat);
1544
1545 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) {
1546 Env<AttrContext> env = x.fst;
1547 JCClassDecl cdef = x.snd;
1548
1549 if (verboseCompilePolicy) {
1550 printNote("[generate "
1551 + (usePrintSource ? " source" : "code")
1552 + " " + cdef.sym + "]");
1553 }
1554
1555 if (!taskListener.isEmpty()) {
1556 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1557 taskListener.started(e);
1558 }
1559
1560 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1561 env.enclClass.sym.sourcefile :
1562 env.toplevel.sourcefile);
1563 try {
1564 JavaFileObject file;
1565 if (usePrintSource)
1566 file = printSource(env, cdef);
1567 else {
1568 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT)
1569 && jniWriter.needsHeader(cdef.sym)) {
1570 jniWriter.write(cdef.sym);
1571 }
1572 file = genCode(env, cdef);
1573 }
1574 if (results != null && file != null)
1575 results.add(file);
1576 } catch (IOException ex) {
1577 log.error(cdef.pos(), "class.cant.write",
1578 cdef.sym, ex.getMessage());
1579 return;
1580 } finally {
1581 log.useSource(prev);
1582 }
1583
1584 if (!taskListener.isEmpty()) {
1585 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1586 taskListener.finished(e);
1587 }
1588 }
1589 }
1590
1591 // where
1592 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) {
1593 // use a LinkedHashMap to preserve the order of the original list as much as possible
1594 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<JCCompilationUnit, Queue<Env<AttrContext>>>();
1595 for (Env<AttrContext> env: envs) {
1596 Queue<Env<AttrContext>> sublist = map.get(env.toplevel);
1597 if (sublist == null) {
1598 sublist = new ListBuffer<Env<AttrContext>>();
1599 map.put(env.toplevel, sublist);
1600 }
1601 sublist.add(env);
1602 }
1603 return map;
1604 }
1605
1606 JCClassDecl removeMethodBodies(JCClassDecl cdef) {
1607 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0;
1608 class MethodBodyRemover extends TreeTranslator {
1609 @Override
1610 public void visitMethodDef(JCMethodDecl tree) {
1611 tree.mods.flags &= ~Flags.SYNCHRONIZED;
1612 for (JCVariableDecl vd : tree.params)
1613 vd.mods.flags &= ~Flags.FINAL;
1614 tree.body = null;
1615 super.visitMethodDef(tree);
1616 }
1617 @Override
1618 public void visitVarDef(JCVariableDecl tree) {
1619 if (tree.init != null && tree.init.type.constValue() == null)
1620 tree.init = null;
1621 super.visitVarDef(tree);
1622 }
1623 @Override
1624 public void visitClassDef(JCClassDecl tree) {
1625 ListBuffer<JCTree> newdefs = new ListBuffer<>();
1626 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
1627 JCTree t = it.head;
1628 switch (t.getTag()) {
1629 case CLASSDEF:
1630 if (isInterface ||
1631 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1632 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1633 newdefs.append(t);
1634 break;
1635 case METHODDEF:
1636 if (isInterface ||
1637 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1638 ((JCMethodDecl) t).sym.name == names.init ||
1639 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1640 newdefs.append(t);
1641 break;
1642 case VARDEF:
1643 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1644 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1645 newdefs.append(t);
1646 break;
1647 default:
1648 break;
1649 }
1650 }
1651 tree.defs = newdefs.toList();
1652 super.visitClassDef(tree);
1653 }
1654 }
1655 MethodBodyRemover r = new MethodBodyRemover();
1656 return r.translate(cdef);
1657 }
1658
1659 public void reportDeferredDiagnostics() {
1660 if (errorCount() == 0
1661 && annotationProcessingOccurred
1662 && implicitSourceFilesRead
1663 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) {
1664 if (explicitAnnotationProcessingRequested())
1665 log.warning("proc.use.implicit");
1666 else
1667 log.warning("proc.use.proc.or.implicit");
1668 }
1669 chk.reportDeferredDiagnostics();
1670 if (log.compressedOutput) {
1671 log.mandatoryNote(null, "compressed.diags");
1672 }
1673 }
1674
1675 /** Close the compiler, flushing the logs
1676 */
1677 public void close() {
1678 close(true);
1679 }
1680
1681 public void close(boolean disposeNames) {
1682 rootClasses = null;
1683 reader = null;
1684 make = null;
1685 writer = null;
1686 enter = null;
1687 if (todo != null)
1688 todo.clear();
1689 todo = null;
1690 parserFactory = null;
1691 syms = null;
1692 source = null;
1693 attr = null;
1694 chk = null;
1695 gen = null;
1696 flow = null;
1697 transTypes = null;
1698 lower = null;
1699 annotate = null;
1700 types = null;
1701
1702 log.flush();
1703 try {
1704 fileManager.flush();
1705 } catch (IOException e) {
1706 throw new Abort(e);
1707 } finally {
1708 if (names != null && disposeNames)
1709 names.dispose();
1710 names = null;
1711
1712 for (Closeable c: closeables) {
1713 try {
1714 c.close();
1715 } catch (IOException e) {
1716 // When javac uses JDK 7 as a baseline, this code would be
1717 // better written to set any/all exceptions from all the
1718 // Closeables as suppressed exceptions on the FatalError
1719 // that is thrown.
1720 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close");
1721 throw new FatalError(msg, e);
1722 }
1723 }
1724 closeables = List.nil();
1725 }
1726 }
1727
1728 protected void printNote(String lines) {
1729 log.printRawLines(Log.WriterKind.NOTICE, lines);
1730 }
1731
1732 /** Print numbers of errors and warnings.
1733 */
1734 public void printCount(String kind, int count) {
1735 if (count != 0) {
1736 String key;
1737 if (count == 1)
1738 key = "count." + kind;
1739 else
1740 key = "count." + kind + ".plural";
1741 log.printLines(WriterKind.ERROR, key, String.valueOf(count));
1742 log.flush(Log.WriterKind.ERROR);
1743 }
1744 }
1745
1746 private static long now() {
1747 return System.currentTimeMillis();
1748 }
1749
1750 private static long elapsed(long then) {
1751 return now() - then;
1752 }
1753
1754 public void initRound(JavaCompiler prev) {
1755 genEndPos = prev.genEndPos;
1756 keepComments = prev.keepComments;
1757 start_msec = prev.start_msec;
1758 hasBeenUsed = true;
1759 closeables = prev.closeables;
1760 prev.closeables = List.nil();
1761 shouldStopPolicyIfError = prev.shouldStopPolicyIfError;
1762 shouldStopPolicyIfNoError = prev.shouldStopPolicyIfNoError;
1763 }
1764 }

Mercurial Repository: jdk8-mips64-public/langtools

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