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