Mercurial > jdk8-mips64-public > langtools / file revision
src/share/classes/com/sun/tools/javac/main/JavaCompiler.java@573ceb23beeb
src/share/classes/com/sun/tools/javac/main/JavaCompiler.java
Fri, 05 Oct 2012 14:35:24 +0100
- author
- mcimadamore
- date
- Fri, 05 Oct 2012 14:35:24 +0100
- changeset 1348
- 573ceb23beeb
- parent 1347
- 1408af4cd8b0
- child 1358
- fc123bdeddb8
- permissions
- -rw-r--r--
7177385: Add attribution support for lambda expressions
Summary: Add support for function descriptor lookup, functional interface inference and lambda expression type-checking
Reviewed-by: jjg, dlsmith
1 /*
2 * Copyright (c) 1999, 2012, 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 */
26 package com.sun.tools.javac.main;
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;
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;
49 import static javax.tools.StandardLocation.CLASS_OUTPUT;
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.file.JavacFileManager;
58 import com.sun.tools.javac.jvm.*;
59 import com.sun.tools.javac.parser.*;
60 import com.sun.tools.javac.processing.*;
61 import com.sun.tools.javac.tree.*;
62 import com.sun.tools.javac.tree.JCTree.*;
63 import com.sun.tools.javac.util.*;
64 import com.sun.tools.javac.util.Log.WriterKind;
66 import static com.sun.tools.javac.main.Option.*;
67 import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;
68 import static com.sun.tools.javac.util.ListBuffer.lb;
71 /** This class could be the main entry point for GJC when GJC is used as a
72 * component in a larger software system. It provides operations to
73 * construct a new compiler, and to run a new compiler on a set of source
74 * files.
75 *
76 * <p><b>This is NOT part of any supported API.
77 * If you write code that depends on this, you do so at your own risk.
78 * This code and its internal interfaces are subject to change or
79 * deletion without notice.</b>
80 */
81 public class JavaCompiler implements ClassReader.SourceCompleter {
82 /** The context key for the compiler. */
83 protected static final Context.Key<JavaCompiler> compilerKey =
84 new Context.Key<JavaCompiler>();
86 /** Get the JavaCompiler instance for this context. */
87 public static JavaCompiler instance(Context context) {
88 JavaCompiler instance = context.get(compilerKey);
89 if (instance == null)
90 instance = new JavaCompiler(context);
91 return instance;
92 }
94 /** The current version number as a string.
95 */
96 public static String version() {
97 return version("release"); // mm.nn.oo[-milestone]
98 }
100 /** The current full version number as a string.
101 */
102 public static String fullVersion() {
103 return version("full"); // mm.mm.oo[-milestone]-build
104 }
106 private static final String versionRBName = "com.sun.tools.javac.resources.version";
107 private static ResourceBundle versionRB;
109 private static String version(String key) {
110 if (versionRB == null) {
111 try {
112 versionRB = ResourceBundle.getBundle(versionRBName);
113 } catch (MissingResourceException e) {
114 return Log.getLocalizedString("version.not.available");
115 }
116 }
117 try {
118 return versionRB.getString(key);
119 }
120 catch (MissingResourceException e) {
121 return Log.getLocalizedString("version.not.available");
122 }
123 }
125 /**
126 * Control how the compiler's latter phases (attr, flow, desugar, generate)
127 * are connected. Each individual file is processed by each phase in turn,
128 * but with different compile policies, you can control the order in which
129 * each class is processed through its next phase.
130 *
131 * <p>Generally speaking, the compiler will "fail fast" in the face of
132 * errors, although not aggressively so. flow, desugar, etc become no-ops
133 * once any errors have occurred. No attempt is currently made to determine
134 * if it might be safe to process a class through its next phase because
135 * it does not depend on any unrelated errors that might have occurred.
136 */
137 protected static enum CompilePolicy {
138 /**
139 * Just attribute the parse trees.
140 */
141 ATTR_ONLY,
143 /**
144 * Just attribute and do flow analysis on the parse trees.
145 * This should catch most user errors.
146 */
147 CHECK_ONLY,
149 /**
150 * Attribute everything, then do flow analysis for everything,
151 * then desugar everything, and only then generate output.
152 * This means no output will be generated if there are any
153 * errors in any classes.
154 */
155 SIMPLE,
157 /**
158 * Groups the classes for each source file together, then process
159 * each group in a manner equivalent to the {@code SIMPLE} policy.
160 * This means no output will be generated if there are any
161 * errors in any of the classes in a source file.
162 */
163 BY_FILE,
165 /**
166 * Completely process each entry on the todo list in turn.
167 * -- this is the same for 1.5.
168 * Means output might be generated for some classes in a compilation unit
169 * and not others.
170 */
171 BY_TODO;
173 static CompilePolicy decode(String option) {
174 if (option == null)
175 return DEFAULT_COMPILE_POLICY;
176 else if (option.equals("attr"))
177 return ATTR_ONLY;
178 else if (option.equals("check"))
179 return CHECK_ONLY;
180 else if (option.equals("simple"))
181 return SIMPLE;
182 else if (option.equals("byfile"))
183 return BY_FILE;
184 else if (option.equals("bytodo"))
185 return BY_TODO;
186 else
187 return DEFAULT_COMPILE_POLICY;
188 }
189 }
191 private static CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO;
193 protected static enum ImplicitSourcePolicy {
194 /** Don't generate or process implicitly read source files. */
195 NONE,
196 /** Generate classes for implicitly read source files. */
197 CLASS,
198 /** Like CLASS, but generate warnings if annotation processing occurs */
199 UNSET;
201 static ImplicitSourcePolicy decode(String option) {
202 if (option == null)
203 return UNSET;
204 else if (option.equals("none"))
205 return NONE;
206 else if (option.equals("class"))
207 return CLASS;
208 else
209 return UNSET;
210 }
211 }
213 /** The log to be used for error reporting.
214 */
215 public Log log;
217 /** Factory for creating diagnostic objects
218 */
219 JCDiagnostic.Factory diagFactory;
221 /** The tree factory module.
222 */
223 protected TreeMaker make;
225 /** The class reader.
226 */
227 protected ClassReader reader;
229 /** The class writer.
230 */
231 protected ClassWriter writer;
233 /** The native header writer.
234 */
235 protected JNIWriter jniWriter;
237 /** The module for the symbol table entry phases.
238 */
239 protected Enter enter;
241 /** The symbol table.
242 */
243 protected Symtab syms;
245 /** The language version.
246 */
247 protected Source source;
249 /** The module for code generation.
250 */
251 protected Gen gen;
253 /** The name table.
254 */
255 protected Names names;
257 /** The attributor.
258 */
259 protected Attr attr;
261 /** The attributor.
262 */
263 protected Check chk;
265 /** The flow analyzer.
266 */
267 protected Flow flow;
269 /** The type eraser.
270 */
271 protected TransTypes transTypes;
273 /** The syntactic sugar desweetener.
274 */
275 protected Lower lower;
277 /** The annotation annotator.
278 */
279 protected Annotate annotate;
281 /** Force a completion failure on this name
282 */
283 protected final Name completionFailureName;
285 /** Type utilities.
286 */
287 protected Types types;
289 /** Access to file objects.
290 */
291 protected JavaFileManager fileManager;
293 /** Factory for parsers.
294 */
295 protected ParserFactory parserFactory;
297 /** Broadcasting listener for progress events
298 */
299 protected MultiTaskListener taskListener;
301 /**
302 * Annotation processing may require and provide a new instance
303 * of the compiler to be used for the analyze and generate phases.
304 */
305 protected JavaCompiler delegateCompiler;
307 /**
308 * Command line options.
309 */
310 protected Options options;
312 protected Context context;
314 /**
315 * Flag set if any annotation processing occurred.
316 **/
317 protected boolean annotationProcessingOccurred;
319 /**
320 * Flag set if any implicit source files read.
321 **/
322 protected boolean implicitSourceFilesRead;
324 /** Construct a new compiler using a shared context.
325 */
326 public JavaCompiler(Context context) {
327 this.context = context;
328 context.put(compilerKey, this);
330 // if fileManager not already set, register the JavacFileManager to be used
331 if (context.get(JavaFileManager.class) == null)
332 JavacFileManager.preRegister(context);
334 names = Names.instance(context);
335 log = Log.instance(context);
336 diagFactory = JCDiagnostic.Factory.instance(context);
337 reader = ClassReader.instance(context);
338 make = TreeMaker.instance(context);
339 writer = ClassWriter.instance(context);
340 jniWriter = JNIWriter.instance(context);
341 enter = Enter.instance(context);
342 todo = Todo.instance(context);
344 fileManager = context.get(JavaFileManager.class);
345 parserFactory = ParserFactory.instance(context);
347 try {
348 // catch completion problems with predefineds
349 syms = Symtab.instance(context);
350 } catch (CompletionFailure ex) {
351 // inlined Check.completionError as it is not initialized yet
352 log.error("cant.access", ex.sym, ex.getDetailValue());
353 if (ex instanceof ClassReader.BadClassFile)
354 throw new Abort();
355 }
356 source = Source.instance(context);
357 attr = Attr.instance(context);
358 chk = Check.instance(context);
359 gen = Gen.instance(context);
360 flow = Flow.instance(context);
361 transTypes = TransTypes.instance(context);
362 lower = Lower.instance(context);
363 annotate = Annotate.instance(context);
364 types = Types.instance(context);
365 taskListener = MultiTaskListener.instance(context);
367 reader.sourceCompleter = this;
369 options = Options.instance(context);
371 verbose = options.isSet(VERBOSE);
372 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s
373 stubOutput = options.isSet("-stubs");
374 relax = options.isSet("-relax");
375 printFlat = options.isSet("-printflat");
376 attrParseOnly = options.isSet("-attrparseonly");
377 encoding = options.get(ENCODING);
378 lineDebugInfo = options.isUnset(G_CUSTOM) ||
379 options.isSet(G_CUSTOM, "lines");
380 genEndPos = options.isSet(XJCOV) ||
381 context.get(DiagnosticListener.class) != null;
382 devVerbose = options.isSet("dev");
383 processPcks = options.isSet("process.packages");
384 werror = options.isSet(WERROR);
386 if (source.compareTo(Source.DEFAULT) < 0) {
387 if (options.isUnset(XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option)) {
388 if (fileManager instanceof BaseFileManager) {
389 if (((BaseFileManager) fileManager).isDefaultBootClassPath())
390 log.warning(LintCategory.OPTIONS, "source.no.bootclasspath", source.name);
391 }
392 }
393 }
395 verboseCompilePolicy = options.isSet("verboseCompilePolicy");
397 if (attrParseOnly)
398 compilePolicy = CompilePolicy.ATTR_ONLY;
399 else
400 compilePolicy = CompilePolicy.decode(options.get("compilePolicy"));
402 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit"));
404 completionFailureName =
405 options.isSet("failcomplete")
406 ? names.fromString(options.get("failcomplete"))
407 : null;
409 shouldStopPolicyIfError =
410 options.isSet("shouldStopPolicy") // backwards compatible
411 ? CompileState.valueOf(options.get("shouldStopPolicy"))
412 : options.isSet("shouldStopPolicyIfError")
413 ? CompileState.valueOf(options.get("shouldStopPolicyIfError"))
414 : CompileState.INIT;
415 shouldStopPolicyIfNoError =
416 options.isSet("shouldStopPolicyIfNoError")
417 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError"))
418 : CompileState.GENERATE;
420 if (options.isUnset("oldDiags"))
421 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context));
422 }
424 /* Switches:
425 */
427 /** Verbose output.
428 */
429 public boolean verbose;
431 /** Emit plain Java source files rather than class files.
432 */
433 public boolean sourceOutput;
435 /** Emit stub source files rather than class files.
436 */
437 public boolean stubOutput;
439 /** Generate attributed parse tree only.
440 */
441 public boolean attrParseOnly;
443 /** Switch: relax some constraints for producing the jsr14 prototype.
444 */
445 boolean relax;
447 /** Debug switch: Emit Java sources after inner class flattening.
448 */
449 public boolean printFlat;
451 /** The encoding to be used for source input.
452 */
453 public String encoding;
455 /** Generate code with the LineNumberTable attribute for debugging
456 */
457 public boolean lineDebugInfo;
459 /** Switch: should we store the ending positions?
460 */
461 public boolean genEndPos;
463 /** Switch: should we debug ignored exceptions
464 */
465 protected boolean devVerbose;
467 /** Switch: should we (annotation) process packages as well
468 */
469 protected boolean processPcks;
471 /** Switch: treat warnings as errors
472 */
473 protected boolean werror;
475 /** Switch: is annotation processing requested explitly via
476 * CompilationTask.setProcessors?
477 */
478 protected boolean explicitAnnotationProcessingRequested = false;
480 /**
481 * The policy for the order in which to perform the compilation
482 */
483 protected CompilePolicy compilePolicy;
485 /**
486 * The policy for what to do with implicitly read source files
487 */
488 protected ImplicitSourcePolicy implicitSourcePolicy;
490 /**
491 * Report activity related to compilePolicy
492 */
493 public boolean verboseCompilePolicy;
495 /**
496 * Policy of how far to continue compilation after errors have occurred.
497 * Set this to minimum CompileState (INIT) to stop as soon as possible
498 * after errors.
499 */
500 public CompileState shouldStopPolicyIfError;
502 /**
503 * Policy of how far to continue compilation when no errors have occurred.
504 * Set this to maximum CompileState (GENERATE) to perform full compilation.
505 * Set this lower to perform partial compilation, such as -proc:only.
506 */
507 public CompileState shouldStopPolicyIfNoError;
509 /** A queue of all as yet unattributed classes.oLo
510 */
511 public Todo todo;
513 /** A list of items to be closed when the compilation is complete.
514 */
515 public List<Closeable> closeables = List.nil();
517 /** Ordered list of compiler phases for each compilation unit. */
518 public enum CompileState {
519 INIT(0),
520 PARSE(1),
521 ENTER(2),
522 PROCESS(3),
523 ATTR(4),
524 FLOW(5),
525 TRANSTYPES(6),
526 LOWER(7),
527 GENERATE(8);
528 CompileState(int value) {
529 this.value = value;
530 }
531 boolean isAfter(CompileState other) {
532 return value > other.value;
533 }
534 public static CompileState max(CompileState a, CompileState b) {
535 return a.value > b.value ? a : b;
536 }
537 private int value;
538 };
539 /** Partial map to record which compiler phases have been executed
540 * for each compilation unit. Used for ATTR and FLOW phases.
541 */
542 protected class CompileStates extends HashMap<Env<AttrContext>,CompileState> {
543 private static final long serialVersionUID = 1812267524140424433L;
544 boolean isDone(Env<AttrContext> env, CompileState cs) {
545 CompileState ecs = get(env);
546 return (ecs != null) && !cs.isAfter(ecs);
547 }
548 }
549 private CompileStates compileStates = new CompileStates();
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>();
557 protected boolean shouldStop(CompileState cs) {
558 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError())
559 ? shouldStopPolicyIfError
560 : shouldStopPolicyIfNoError;
561 return cs.isAfter(shouldStopPolicy);
562 }
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 }
577 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) {
578 return shouldStop(cs) ? ListBuffer.<T>lb() : queue;
579 }
581 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) {
582 return shouldStop(cs) ? List.<T>nil() : list;
583 }
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 }
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 }
608 /** Parse contents of input stream.
609 * @param filename The name of the file from which input stream comes.
610 * @param input The input stream 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 }
624 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo);
625 tree = parser.parseCompilationUnit();
626 if (verbose) {
627 log.printVerbose("parsing.done", Long.toString(elapsed(msec)));
628 }
629 }
631 tree.sourcefile = filename;
633 if (content != null && !taskListener.isEmpty()) {
634 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree);
635 taskListener.finished(e);
636 }
638 return tree;
639 }
640 // where
641 public boolean keepComments = false;
642 protected boolean keepComments() {
643 return keepComments || sourceOutput || stubOutput;
644 }
647 /** Parse contents of file.
648 * @param filename The name of the file to be parsed.
649 */
650 @Deprecated
651 public JCTree.JCCompilationUnit parse(String filename) {
652 JavacFileManager fm = (JavacFileManager)fileManager;
653 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next());
654 }
656 /** Parse contents of file.
657 * @param filename The name of the file to be parsed.
658 */
659 public JCTree.JCCompilationUnit parse(JavaFileObject filename) {
660 JavaFileObject prev = log.useSource(filename);
661 try {
662 JCTree.JCCompilationUnit t = parse(filename, readSource(filename));
663 if (t.endPositions != null)
664 log.setEndPosTable(filename, t.endPositions);
665 return t;
666 } finally {
667 log.useSource(prev);
668 }
669 }
671 /** Resolve an identifier which may be the binary name of a class or
672 * the Java name of a class or package.
673 * @param name The name to resolve
674 */
675 public Symbol resolveBinaryNameOrIdent(String name) {
676 try {
677 Name flatname = names.fromString(name.replace("/", "."));
678 return reader.loadClass(flatname);
679 } catch (CompletionFailure ignore) {
680 return resolveIdent(name);
681 }
682 }
684 /** Resolve an identifier.
685 * @param name The identifier to resolve
686 */
687 public Symbol resolveIdent(String name) {
688 if (name.equals(""))
689 return syms.errSymbol;
690 JavaFileObject prev = log.useSource(null);
691 try {
692 JCExpression tree = null;
693 for (String s : name.split("\\.", -1)) {
694 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords
695 return syms.errSymbol;
696 tree = (tree == null) ? make.Ident(names.fromString(s))
697 : make.Select(tree, names.fromString(s));
698 }
699 JCCompilationUnit toplevel =
700 make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
701 toplevel.packge = syms.unnamedPackage;
702 return attr.attribIdent(tree, toplevel);
703 } finally {
704 log.useSource(prev);
705 }
706 }
708 /** Emit plain Java source for a class.
709 * @param env The attribution environment of the outermost class
710 * containing this class.
711 * @param cdef The class definition to be printed.
712 */
713 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
714 JavaFileObject outFile
715 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
716 cdef.sym.flatname.toString(),
717 JavaFileObject.Kind.SOURCE,
718 null);
719 if (inputFiles.contains(outFile)) {
720 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile);
721 return null;
722 } else {
723 BufferedWriter out = new BufferedWriter(outFile.openWriter());
724 try {
725 new Pretty(out, true).printUnit(env.toplevel, cdef);
726 if (verbose)
727 log.printVerbose("wrote.file", outFile);
728 } finally {
729 out.close();
730 }
731 return outFile;
732 }
733 }
735 /** Generate code and emit a class file for a given class
736 * @param env The attribution environment of the outermost class
737 * containing this class.
738 * @param cdef The class definition from which code is generated.
739 */
740 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
741 try {
742 if (gen.genClass(env, cdef) && (errorCount() == 0))
743 return writer.writeClass(cdef.sym);
744 } catch (ClassWriter.PoolOverflow ex) {
745 log.error(cdef.pos(), "limit.pool");
746 } catch (ClassWriter.StringOverflow ex) {
747 log.error(cdef.pos(), "limit.string.overflow",
748 ex.value.substring(0, 20));
749 } catch (CompletionFailure ex) {
750 chk.completionError(cdef.pos(), ex);
751 }
752 return null;
753 }
755 /** Complete compiling a source file that has been accessed
756 * by the class file reader.
757 * @param c The class the source file of which needs to be compiled.
758 * @param filename The name of the source file.
759 * @param f An input stream that reads the source file.
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);
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 }
779 if (!taskListener.isEmpty()) {
780 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
781 taskListener.started(e);
782 }
784 enter.complete(List.of(tree), c);
786 if (!taskListener.isEmpty()) {
787 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
788 taskListener.finished(e);
789 }
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 }
810 implicitSourceFilesRead = true;
811 }
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;
818 public void compile(List<JavaFileObject> sourceFileObject)
819 throws Throwable {
820 compile(sourceFileObject, List.<String>nil(), null);
821 }
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;
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);
848 start_msec = now();
850 try {
851 initProcessAnnotations(processors);
853 // These method calls must be chained to avoid memory leaks
854 delegateCompiler =
855 processAnnotations(
856 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))),
857 classnames);
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 }
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;
882 case CHECK_ONLY:
883 flow(attribute(todo));
884 break;
886 case SIMPLE:
887 generate(desugar(flow(attribute(todo))));
888 break;
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;
898 case BY_TODO:
899 while (!todo.isEmpty())
900 generate(desugar(flow(attribute(todo.remove()))));
901 break;
903 default:
904 Assert.error("unknown compile policy");
905 }
906 } catch (Abort ex) {
907 if (devVerbose)
908 ex.printStackTrace(System.err);
909 }
911 if (verbose) {
912 elapsed_msec = elapsed(start_msec);
913 log.printVerbose("total", Long.toString(elapsed_msec));
914 }
916 reportDeferredDiagnostics();
918 if (!log.hasDiagnosticListener()) {
919 printCount("error", errorCount());
920 printCount("warn", warningCount());
921 }
922 }
924 private List<JCClassDecl> rootClasses;
926 /**
927 * Parses a list of files.
928 */
929 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) {
930 if (shouldStop(CompileState.PARSE))
931 return List.nil();
933 //parse all files
934 ListBuffer<JCCompilationUnit> trees = lb();
935 Set<JavaFileObject> filesSoFar = new HashSet<JavaFileObject>();
936 for (JavaFileObject fileObject : fileObjects) {
937 if (!filesSoFar.contains(fileObject)) {
938 filesSoFar.add(fileObject);
939 trees.append(parse(fileObject));
940 }
941 }
942 return trees.toList();
943 }
945 /**
946 * Enter the symbols found in a list of parse trees if the compilation
947 * is expected to proceed beyond anno processing into attr.
948 * As a side-effect, this puts elements on the "todo" list.
949 * Also stores a list of all top level classes in rootClasses.
950 */
951 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) {
952 if (shouldStop(CompileState.ATTR))
953 return List.nil();
954 return enterTrees(roots);
955 }
957 /**
958 * Enter the symbols found in a list of parse trees.
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> enterTrees(List<JCCompilationUnit> roots) {
963 //enter symbols for all files
964 if (!taskListener.isEmpty()) {
965 for (JCCompilationUnit unit: roots) {
966 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
967 taskListener.started(e);
968 }
969 }
971 enter.main(roots);
973 if (!taskListener.isEmpty()) {
974 for (JCCompilationUnit unit: roots) {
975 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
976 taskListener.finished(e);
977 }
978 }
980 //If generating source, remember the classes declared in
981 //the original compilation units listed on the command line.
982 if (sourceOutput || stubOutput) {
983 ListBuffer<JCClassDecl> cdefs = lb();
984 for (JCCompilationUnit unit : roots) {
985 for (List<JCTree> defs = unit.defs;
986 defs.nonEmpty();
987 defs = defs.tail) {
988 if (defs.head instanceof JCClassDecl)
989 cdefs.append((JCClassDecl)defs.head);
990 }
991 }
992 rootClasses = cdefs.toList();
993 }
995 // Ensure the input files have been recorded. Although this is normally
996 // done by readSource, it may not have been done if the trees were read
997 // in a prior round of annotation processing, and the trees have been
998 // cleaned and are being reused.
999 for (JCCompilationUnit unit : roots) {
1000 inputFiles.add(unit.sourcefile);
1001 }
1003 return roots;
1004 }
1006 /**
1007 * Set to true to enable skeleton annotation processing code.
1008 * Currently, we assume this variable will be replaced more
1009 * advanced logic to figure out if annotation processing is
1010 * needed.
1011 */
1012 boolean processAnnotations = false;
1014 /**
1015 * Object to handle annotation processing.
1016 */
1017 private JavacProcessingEnvironment procEnvImpl = null;
1019 /**
1020 * Check if we should process annotations.
1021 * If so, and if no scanner is yet registered, then set up the DocCommentScanner
1022 * to catch doc comments, and set keepComments so the parser records them in
1023 * the compilation unit.
1024 *
1025 * @param processors user provided annotation processors to bypass
1026 * discovery, {@code null} means that no processors were provided
1027 */
1028 public void initProcessAnnotations(Iterable<? extends Processor> processors) {
1029 // Process annotations if processing is not disabled and there
1030 // is at least one Processor available.
1031 if (options.isSet(PROC, "none")) {
1032 processAnnotations = false;
1033 } else if (procEnvImpl == null) {
1034 procEnvImpl = new JavacProcessingEnvironment(context, processors);
1035 processAnnotations = procEnvImpl.atLeastOneProcessor();
1037 if (processAnnotations) {
1038 options.put("save-parameter-names", "save-parameter-names");
1039 reader.saveParameterNames = true;
1040 keepComments = true;
1041 genEndPos = true;
1042 if (!taskListener.isEmpty())
1043 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
1044 log.deferAll();
1045 } else { // free resources
1046 procEnvImpl.close();
1047 }
1048 }
1049 }
1051 // TODO: called by JavacTaskImpl
1052 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots) {
1053 return processAnnotations(roots, List.<String>nil());
1054 }
1056 /**
1057 * Process any annotations found in the specified compilation units.
1058 * @param roots a list of compilation units
1059 * @return an instance of the compiler in which to complete the compilation
1060 */
1061 // Implementation note: when this method is called, log.deferredDiagnostics
1062 // will have been set true by initProcessAnnotations, meaning that any diagnostics
1063 // that are reported will go into the log.deferredDiagnostics queue.
1064 // By the time this method exits, log.deferDiagnostics must be set back to false,
1065 // and all deferredDiagnostics must have been handled: i.e. either reported
1066 // or determined to be transient, and therefore suppressed.
1067 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots,
1068 List<String> classnames) {
1069 if (shouldStop(CompileState.PROCESS)) {
1070 // Errors were encountered.
1071 // Unless all the errors are resolve errors, the errors were parse errors
1072 // or other errors during enter which cannot be fixed by running
1073 // any annotation processors.
1074 if (unrecoverableError()) {
1075 log.reportDeferredDiagnostics();
1076 return this;
1077 }
1078 }
1080 // ASSERT: processAnnotations and procEnvImpl should have been set up by
1081 // by initProcessAnnotations
1083 // NOTE: The !classnames.isEmpty() checks should be refactored to Main.
1085 if (!processAnnotations) {
1086 // If there are no annotation processors present, and
1087 // annotation processing is to occur with compilation,
1088 // emit a warning.
1089 if (options.isSet(PROC, "only")) {
1090 log.warning("proc.proc-only.requested.no.procs");
1091 todo.clear();
1092 }
1093 // If not processing annotations, classnames must be empty
1094 if (!classnames.isEmpty()) {
1095 log.error("proc.no.explicit.annotation.processing.requested",
1096 classnames);
1097 }
1098 log.reportDeferredDiagnostics();
1099 return this; // continue regular compilation
1100 }
1102 try {
1103 List<ClassSymbol> classSymbols = List.nil();
1104 List<PackageSymbol> pckSymbols = List.nil();
1105 if (!classnames.isEmpty()) {
1106 // Check for explicit request for annotation
1107 // processing
1108 if (!explicitAnnotationProcessingRequested()) {
1109 log.error("proc.no.explicit.annotation.processing.requested",
1110 classnames);
1111 log.reportDeferredDiagnostics();
1112 return this; // TODO: Will this halt compilation?
1113 } else {
1114 boolean errors = false;
1115 for (String nameStr : classnames) {
1116 Symbol sym = resolveBinaryNameOrIdent(nameStr);
1117 if (sym == null ||
1118 (sym.kind == Kinds.PCK && !processPcks) ||
1119 sym.kind == Kinds.ABSENT_TYP) {
1120 log.error("proc.cant.find.class", nameStr);
1121 errors = true;
1122 continue;
1123 }
1124 try {
1125 if (sym.kind == Kinds.PCK)
1126 sym.complete();
1127 if (sym.exists()) {
1128 if (sym.kind == Kinds.PCK)
1129 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1130 else
1131 classSymbols = classSymbols.prepend((ClassSymbol)sym);
1132 continue;
1133 }
1134 Assert.check(sym.kind == Kinds.PCK);
1135 log.warning("proc.package.does.not.exist", nameStr);
1136 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1137 } catch (CompletionFailure e) {
1138 log.error("proc.cant.find.class", nameStr);
1139 errors = true;
1140 continue;
1141 }
1142 }
1143 if (errors) {
1144 log.reportDeferredDiagnostics();
1145 return this;
1146 }
1147 }
1148 }
1149 try {
1150 JavaCompiler c = procEnvImpl.doProcessing(context, roots, classSymbols, pckSymbols);
1151 if (c != this)
1152 annotationProcessingOccurred = c.annotationProcessingOccurred = true;
1153 // doProcessing will have handled deferred diagnostics
1154 Assert.check(c.log.deferredDiagFilter == null
1155 && c.log.deferredDiagnostics.size() == 0);
1156 return c;
1157 } finally {
1158 procEnvImpl.close();
1159 }
1160 } catch (CompletionFailure ex) {
1161 log.error("cant.access", ex.sym, ex.getDetailValue());
1162 log.reportDeferredDiagnostics();
1163 return this;
1164 }
1165 }
1167 private boolean unrecoverableError() {
1168 for (JCDiagnostic d: log.deferredDiagnostics) {
1169 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE))
1170 return true;
1171 }
1172 return false;
1173 }
1175 boolean explicitAnnotationProcessingRequested() {
1176 return
1177 explicitAnnotationProcessingRequested ||
1178 explicitAnnotationProcessingRequested(options);
1179 }
1181 static boolean explicitAnnotationProcessingRequested(Options options) {
1182 return
1183 options.isSet(PROCESSOR) ||
1184 options.isSet(PROCESSORPATH) ||
1185 options.isSet(PROC, "only") ||
1186 options.isSet(XPRINT);
1187 }
1189 /**
1190 * Attribute a list of parse trees, such as found on the "todo" list.
1191 * Note that attributing classes may cause additional files to be
1192 * parsed and entered via the SourceCompleter.
1193 * Attribution of the entries in the list does not stop if any errors occur.
1194 * @returns a list of environments for attributd classes.
1195 */
1196 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) {
1197 ListBuffer<Env<AttrContext>> results = lb();
1198 while (!envs.isEmpty())
1199 results.append(attribute(envs.remove()));
1200 return stopIfError(CompileState.ATTR, results);
1201 }
1203 /**
1204 * Attribute a parse tree.
1205 * @returns the attributed parse tree
1206 */
1207 public Env<AttrContext> attribute(Env<AttrContext> env) {
1208 if (compileStates.isDone(env, CompileState.ATTR))
1209 return env;
1211 if (verboseCompilePolicy)
1212 printNote("[attribute " + env.enclClass.sym + "]");
1213 if (verbose)
1214 log.printVerbose("checking.attribution", env.enclClass.sym);
1216 if (!taskListener.isEmpty()) {
1217 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1218 taskListener.started(e);
1219 }
1221 JavaFileObject prev = log.useSource(
1222 env.enclClass.sym.sourcefile != null ?
1223 env.enclClass.sym.sourcefile :
1224 env.toplevel.sourcefile);
1225 try {
1226 attr.attrib(env);
1227 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) {
1228 //if in fail-over mode, ensure that AST expression nodes
1229 //are correctly initialized (e.g. they have a type/symbol)
1230 attr.postAttr(env.tree);
1231 }
1232 compileStates.put(env, CompileState.ATTR);
1233 }
1234 finally {
1235 log.useSource(prev);
1236 }
1238 return env;
1239 }
1241 /**
1242 * Perform dataflow checks on attributed parse trees.
1243 * These include checks for definite assignment and unreachable statements.
1244 * If any errors occur, an empty list will be returned.
1245 * @returns the list of attributed parse trees
1246 */
1247 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) {
1248 ListBuffer<Env<AttrContext>> results = lb();
1249 for (Env<AttrContext> env: envs) {
1250 flow(env, results);
1251 }
1252 return stopIfError(CompileState.FLOW, results);
1253 }
1255 /**
1256 * Perform dataflow checks on an attributed parse tree.
1257 */
1258 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) {
1259 ListBuffer<Env<AttrContext>> results = lb();
1260 flow(env, results);
1261 return stopIfError(CompileState.FLOW, results);
1262 }
1264 /**
1265 * Perform dataflow checks on an attributed parse tree.
1266 */
1267 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) {
1268 try {
1269 if (shouldStop(CompileState.FLOW))
1270 return;
1272 if (relax || compileStates.isDone(env, CompileState.FLOW)) {
1273 results.add(env);
1274 return;
1275 }
1277 if (verboseCompilePolicy)
1278 printNote("[flow " + env.enclClass.sym + "]");
1279 JavaFileObject prev = log.useSource(
1280 env.enclClass.sym.sourcefile != null ?
1281 env.enclClass.sym.sourcefile :
1282 env.toplevel.sourcefile);
1283 try {
1284 make.at(Position.FIRSTPOS);
1285 TreeMaker localMake = make.forToplevel(env.toplevel);
1286 flow.analyzeTree(env, localMake);
1287 compileStates.put(env, CompileState.FLOW);
1289 if (shouldStop(CompileState.FLOW))
1290 return;
1292 results.add(env);
1293 }
1294 finally {
1295 log.useSource(prev);
1296 }
1297 }
1298 finally {
1299 if (!taskListener.isEmpty()) {
1300 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1301 taskListener.finished(e);
1302 }
1303 }
1304 }
1306 /**
1307 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1308 * for source or code generation.
1309 * If any errors occur, an empty list will be returned.
1310 * @returns a list containing the classes to be generated
1311 */
1312 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) {
1313 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = lb();
1314 for (Env<AttrContext> env: envs)
1315 desugar(env, results);
1316 return stopIfError(CompileState.FLOW, results);
1317 }
1319 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs =
1320 new HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>>();
1322 /**
1323 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1324 * for source or code generation. If the file was not listed on the command line,
1325 * the current implicitSourcePolicy is taken into account.
1326 * The preparation stops as soon as an error is found.
1327 */
1328 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) {
1329 if (shouldStop(CompileState.TRANSTYPES))
1330 return;
1332 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE
1333 && !inputFiles.contains(env.toplevel.sourcefile)) {
1334 return;
1335 }
1337 if (compileStates.isDone(env, CompileState.LOWER)) {
1338 results.addAll(desugaredEnvs.get(env));
1339 return;
1340 }
1342 /**
1343 * Ensure that superclasses of C are desugared before C itself. This is
1344 * required for two reasons: (i) as erasure (TransTypes) destroys
1345 * information needed in flow analysis and (ii) as some checks carried
1346 * out during lowering require that all synthetic fields/methods have
1347 * already been added to C and its superclasses.
1348 */
1349 class ScanNested extends TreeScanner {
1350 Set<Env<AttrContext>> dependencies = new LinkedHashSet<Env<AttrContext>>();
1351 @Override
1352 public void visitClassDef(JCClassDecl node) {
1353 Type st = types.supertype(node.sym.type);
1354 if (st.tag == TypeTags.CLASS) {
1355 ClassSymbol c = st.tsym.outermostClass();
1356 Env<AttrContext> stEnv = enter.getEnv(c);
1357 if (stEnv != null && env != stEnv) {
1358 if (dependencies.add(stEnv))
1359 scan(stEnv.tree);
1360 }
1361 }
1362 super.visitClassDef(node);
1363 }
1364 }
1365 ScanNested scanner = new ScanNested();
1366 scanner.scan(env.tree);
1367 for (Env<AttrContext> dep: scanner.dependencies) {
1368 if (!compileStates.isDone(dep, CompileState.FLOW))
1369 desugaredEnvs.put(dep, desugar(flow(attribute(dep))));
1370 }
1372 //We need to check for error another time as more classes might
1373 //have been attributed and analyzed at this stage
1374 if (shouldStop(CompileState.TRANSTYPES))
1375 return;
1377 if (verboseCompilePolicy)
1378 printNote("[desugar " + env.enclClass.sym + "]");
1380 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1381 env.enclClass.sym.sourcefile :
1382 env.toplevel.sourcefile);
1383 try {
1384 //save tree prior to rewriting
1385 JCTree untranslated = env.tree;
1387 make.at(Position.FIRSTPOS);
1388 TreeMaker localMake = make.forToplevel(env.toplevel);
1390 if (env.tree instanceof JCCompilationUnit) {
1391 if (!(stubOutput || sourceOutput || printFlat)) {
1392 if (shouldStop(CompileState.LOWER))
1393 return;
1394 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake);
1395 if (pdef.head != null) {
1396 Assert.check(pdef.tail.isEmpty());
1397 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, (JCClassDecl)pdef.head));
1398 }
1399 }
1400 return;
1401 }
1403 if (stubOutput) {
1404 //emit stub Java source file, only for compilation
1405 //units enumerated explicitly on the command line
1406 JCClassDecl cdef = (JCClassDecl)env.tree;
1407 if (untranslated instanceof JCClassDecl &&
1408 rootClasses.contains((JCClassDecl)untranslated) &&
1409 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1410 cdef.sym.packge().getQualifiedName() == names.java_lang)) {
1411 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, removeMethodBodies(cdef)));
1412 }
1413 return;
1414 }
1416 if (shouldStop(CompileState.TRANSTYPES))
1417 return;
1419 env.tree = transTypes.translateTopLevelClass(env.tree, localMake);
1420 compileStates.put(env, CompileState.TRANSTYPES);
1422 if (shouldStop(CompileState.LOWER))
1423 return;
1425 if (sourceOutput) {
1426 //emit standard Java source file, only for compilation
1427 //units enumerated explicitly on the command line
1428 JCClassDecl cdef = (JCClassDecl)env.tree;
1429 if (untranslated instanceof JCClassDecl &&
1430 rootClasses.contains((JCClassDecl)untranslated)) {
1431 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1432 }
1433 return;
1434 }
1436 //translate out inner classes
1437 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake);
1438 compileStates.put(env, CompileState.LOWER);
1440 if (shouldStop(CompileState.LOWER))
1441 return;
1443 //generate code for each class
1444 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) {
1445 JCClassDecl cdef = (JCClassDecl)l.head;
1446 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1447 }
1448 }
1449 finally {
1450 log.useSource(prev);
1451 }
1453 }
1455 /** Generates the source or class file for a list of classes.
1456 * The decision to generate a source file or a class file is
1457 * based upon the compiler's options.
1458 * Generation stops if an error occurs while writing files.
1459 */
1460 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) {
1461 generate(queue, null);
1462 }
1464 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) {
1465 if (shouldStop(CompileState.GENERATE))
1466 return;
1468 boolean usePrintSource = (stubOutput || sourceOutput || printFlat);
1470 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) {
1471 Env<AttrContext> env = x.fst;
1472 JCClassDecl cdef = x.snd;
1474 if (verboseCompilePolicy) {
1475 printNote("[generate "
1476 + (usePrintSource ? " source" : "code")
1477 + " " + cdef.sym + "]");
1478 }
1480 if (!taskListener.isEmpty()) {
1481 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1482 taskListener.started(e);
1483 }
1485 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1486 env.enclClass.sym.sourcefile :
1487 env.toplevel.sourcefile);
1488 try {
1489 JavaFileObject file;
1490 if (usePrintSource)
1491 file = printSource(env, cdef);
1492 else {
1493 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT)
1494 && jniWriter.needsHeader(cdef.sym)) {
1495 jniWriter.write(cdef.sym);
1496 }
1497 file = genCode(env, cdef);
1498 }
1499 if (results != null && file != null)
1500 results.add(file);
1501 } catch (IOException ex) {
1502 log.error(cdef.pos(), "class.cant.write",
1503 cdef.sym, ex.getMessage());
1504 return;
1505 } finally {
1506 log.useSource(prev);
1507 }
1509 if (!taskListener.isEmpty()) {
1510 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1511 taskListener.finished(e);
1512 }
1513 }
1514 }
1516 // where
1517 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) {
1518 // use a LinkedHashMap to preserve the order of the original list as much as possible
1519 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<JCCompilationUnit, Queue<Env<AttrContext>>>();
1520 for (Env<AttrContext> env: envs) {
1521 Queue<Env<AttrContext>> sublist = map.get(env.toplevel);
1522 if (sublist == null) {
1523 sublist = new ListBuffer<Env<AttrContext>>();
1524 map.put(env.toplevel, sublist);
1525 }
1526 sublist.add(env);
1527 }
1528 return map;
1529 }
1531 JCClassDecl removeMethodBodies(JCClassDecl cdef) {
1532 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0;
1533 class MethodBodyRemover extends TreeTranslator {
1534 @Override
1535 public void visitMethodDef(JCMethodDecl tree) {
1536 tree.mods.flags &= ~Flags.SYNCHRONIZED;
1537 for (JCVariableDecl vd : tree.params)
1538 vd.mods.flags &= ~Flags.FINAL;
1539 tree.body = null;
1540 super.visitMethodDef(tree);
1541 }
1542 @Override
1543 public void visitVarDef(JCVariableDecl tree) {
1544 if (tree.init != null && tree.init.type.constValue() == null)
1545 tree.init = null;
1546 super.visitVarDef(tree);
1547 }
1548 @Override
1549 public void visitClassDef(JCClassDecl tree) {
1550 ListBuffer<JCTree> newdefs = lb();
1551 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
1552 JCTree t = it.head;
1553 switch (t.getTag()) {
1554 case CLASSDEF:
1555 if (isInterface ||
1556 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1557 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1558 newdefs.append(t);
1559 break;
1560 case METHODDEF:
1561 if (isInterface ||
1562 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1563 ((JCMethodDecl) t).sym.name == names.init ||
1564 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1565 newdefs.append(t);
1566 break;
1567 case VARDEF:
1568 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1569 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1570 newdefs.append(t);
1571 break;
1572 default:
1573 break;
1574 }
1575 }
1576 tree.defs = newdefs.toList();
1577 super.visitClassDef(tree);
1578 }
1579 }
1580 MethodBodyRemover r = new MethodBodyRemover();
1581 return r.translate(cdef);
1582 }
1584 public void reportDeferredDiagnostics() {
1585 if (errorCount() == 0
1586 && annotationProcessingOccurred
1587 && implicitSourceFilesRead
1588 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) {
1589 if (explicitAnnotationProcessingRequested())
1590 log.warning("proc.use.implicit");
1591 else
1592 log.warning("proc.use.proc.or.implicit");
1593 }
1594 chk.reportDeferredDiagnostics();
1595 }
1597 /** Close the compiler, flushing the logs
1598 */
1599 public void close() {
1600 close(true);
1601 }
1603 public void close(boolean disposeNames) {
1604 rootClasses = null;
1605 reader = null;
1606 make = null;
1607 writer = null;
1608 enter = null;
1609 if (todo != null)
1610 todo.clear();
1611 todo = null;
1612 parserFactory = null;
1613 syms = null;
1614 source = null;
1615 attr = null;
1616 chk = null;
1617 gen = null;
1618 flow = null;
1619 transTypes = null;
1620 lower = null;
1621 annotate = null;
1622 types = null;
1624 log.flush();
1625 try {
1626 fileManager.flush();
1627 } catch (IOException e) {
1628 throw new Abort(e);
1629 } finally {
1630 if (names != null && disposeNames)
1631 names.dispose();
1632 names = null;
1634 for (Closeable c: closeables) {
1635 try {
1636 c.close();
1637 } catch (IOException e) {
1638 // When javac uses JDK 7 as a baseline, this code would be
1639 // better written to set any/all exceptions from all the
1640 // Closeables as suppressed exceptions on the FatalError
1641 // that is thrown.
1642 JCDiagnostic msg = diagFactory.fragment("fatal.err.cant.close");
1643 throw new FatalError(msg, e);
1644 }
1645 }
1646 }
1647 }
1649 protected void printNote(String lines) {
1650 log.printRawLines(Log.WriterKind.NOTICE, lines);
1651 }
1653 /** Print numbers of errors and warnings.
1654 */
1655 protected void printCount(String kind, int count) {
1656 if (count != 0) {
1657 String key;
1658 if (count == 1)
1659 key = "count." + kind;
1660 else
1661 key = "count." + kind + ".plural";
1662 log.printLines(WriterKind.ERROR, key, String.valueOf(count));
1663 log.flush(Log.WriterKind.ERROR);
1664 }
1665 }
1667 private static long now() {
1668 return System.currentTimeMillis();
1669 }
1671 private static long elapsed(long then) {
1672 return now() - then;
1673 }
1675 public void initRound(JavaCompiler prev) {
1676 genEndPos = prev.genEndPos;
1677 keepComments = prev.keepComments;
1678 start_msec = prev.start_msec;
1679 hasBeenUsed = true;
1680 closeables = prev.closeables;
1681 prev.closeables = List.nil();
1682 shouldStopPolicyIfError = prev.shouldStopPolicyIfError;
1683 shouldStopPolicyIfNoError = prev.shouldStopPolicyIfNoError;
1684 }
1686 public static void enableLogging() {
1687 Logger logger = Logger.getLogger(com.sun.tools.javac.Main.class.getPackage().getName());
1688 logger.setLevel(Level.ALL);
1689 for (Handler h : logger.getParent().getHandlers()) {
1690 h.setLevel(Level.ALL);
1691 }
1693 }
1694 }
