Sun, 17 Feb 2013 16:44:55 -0500
Merge
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 */
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.code.TypeTag.CLASS;
67 import static com.sun.tools.javac.main.Option.*;
68 import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;
69 import static com.sun.tools.javac.util.ListBuffer.lb;
72 /** This class could be the main entry point for GJC when GJC is used as a
73 * component in a larger software system. It provides operations to
74 * construct a new compiler, and to run a new compiler on a set of source
75 * files.
76 *
77 * <p><b>This is NOT part of any supported API.
78 * If you write code that depends on this, you do so at your own risk.
79 * This code and its internal interfaces are subject to change or
80 * deletion without notice.</b>
81 */
82 public class JavaCompiler implements ClassReader.SourceCompleter {
83 /** The context key for the compiler. */
84 protected static final Context.Key<JavaCompiler> compilerKey =
85 new Context.Key<JavaCompiler>();
87 /** Get the JavaCompiler instance for this context. */
88 public static JavaCompiler instance(Context context) {
89 JavaCompiler instance = context.get(compilerKey);
90 if (instance == null)
91 instance = new JavaCompiler(context);
92 return instance;
93 }
95 /** The current version number as a string.
96 */
97 public static String version() {
98 return version("release"); // mm.nn.oo[-milestone]
99 }
101 /** The current full version number as a string.
102 */
103 public static String fullVersion() {
104 return version("full"); // mm.mm.oo[-milestone]-build
105 }
107 private static final String versionRBName = "com.sun.tools.javac.resources.version";
108 private static ResourceBundle versionRB;
110 private static String version(String key) {
111 if (versionRB == null) {
112 try {
113 versionRB = ResourceBundle.getBundle(versionRBName);
114 } catch (MissingResourceException e) {
115 return Log.getLocalizedString("version.not.available");
116 }
117 }
118 try {
119 return versionRB.getString(key);
120 }
121 catch (MissingResourceException e) {
122 return Log.getLocalizedString("version.not.available");
123 }
124 }
126 /**
127 * Control how the compiler's latter phases (attr, flow, desugar, generate)
128 * are connected. Each individual file is processed by each phase in turn,
129 * but with different compile policies, you can control the order in which
130 * each class is processed through its next phase.
131 *
132 * <p>Generally speaking, the compiler will "fail fast" in the face of
133 * errors, although not aggressively so. flow, desugar, etc become no-ops
134 * once any errors have occurred. No attempt is currently made to determine
135 * if it might be safe to process a class through its next phase because
136 * it does not depend on any unrelated errors that might have occurred.
137 */
138 protected static enum CompilePolicy {
139 /**
140 * Just attribute the parse trees.
141 */
142 ATTR_ONLY,
144 /**
145 * Just attribute and do flow analysis on the parse trees.
146 * This should catch most user errors.
147 */
148 CHECK_ONLY,
150 /**
151 * Attribute everything, then do flow analysis for everything,
152 * then desugar everything, and only then generate output.
153 * This means no output will be generated if there are any
154 * errors in any classes.
155 */
156 SIMPLE,
158 /**
159 * Groups the classes for each source file together, then process
160 * each group in a manner equivalent to the {@code SIMPLE} policy.
161 * This means no output will be generated if there are any
162 * errors in any of the classes in a source file.
163 */
164 BY_FILE,
166 /**
167 * Completely process each entry on the todo list in turn.
168 * -- this is the same for 1.5.
169 * Means output might be generated for some classes in a compilation unit
170 * and not others.
171 */
172 BY_TODO;
174 static CompilePolicy decode(String option) {
175 if (option == null)
176 return DEFAULT_COMPILE_POLICY;
177 else if (option.equals("attr"))
178 return ATTR_ONLY;
179 else if (option.equals("check"))
180 return CHECK_ONLY;
181 else if (option.equals("simple"))
182 return SIMPLE;
183 else if (option.equals("byfile"))
184 return BY_FILE;
185 else if (option.equals("bytodo"))
186 return BY_TODO;
187 else
188 return DEFAULT_COMPILE_POLICY;
189 }
190 }
192 private static final CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO;
194 protected static enum ImplicitSourcePolicy {
195 /** Don't generate or process implicitly read source files. */
196 NONE,
197 /** Generate classes for implicitly read source files. */
198 CLASS,
199 /** Like CLASS, but generate warnings if annotation processing occurs */
200 UNSET;
202 static ImplicitSourcePolicy decode(String option) {
203 if (option == null)
204 return UNSET;
205 else if (option.equals("none"))
206 return NONE;
207 else if (option.equals("class"))
208 return CLASS;
209 else
210 return UNSET;
211 }
212 }
214 /** The log to be used for error reporting.
215 */
216 public Log log;
218 /** Factory for creating diagnostic objects
219 */
220 JCDiagnostic.Factory diagFactory;
222 /** The tree factory module.
223 */
224 protected TreeMaker make;
226 /** The class reader.
227 */
228 protected ClassReader reader;
230 /** The class writer.
231 */
232 protected ClassWriter writer;
234 /** The native header writer.
235 */
236 protected JNIWriter jniWriter;
238 /** The module for the symbol table entry phases.
239 */
240 protected Enter enter;
242 /** The symbol table.
243 */
244 protected Symtab syms;
246 /** The language version.
247 */
248 protected Source source;
250 /** The module for code generation.
251 */
252 protected Gen gen;
254 /** The name table.
255 */
256 protected Names names;
258 /** The attributor.
259 */
260 protected Attr attr;
262 /** The attributor.
263 */
264 protected Check chk;
266 /** The flow analyzer.
267 */
268 protected Flow flow;
270 /** The type eraser.
271 */
272 protected TransTypes transTypes;
274 /** The lambda translator.
275 */
276 protected LambdaToMethod lambdaToMethod;
278 /** The syntactic sugar desweetener.
279 */
280 protected Lower lower;
282 /** The annotation annotator.
283 */
284 protected Annotate annotate;
286 /** Force a completion failure on this name
287 */
288 protected final Name completionFailureName;
290 /** Type utilities.
291 */
292 protected Types types;
294 /** Access to file objects.
295 */
296 protected JavaFileManager fileManager;
298 /** Factory for parsers.
299 */
300 protected ParserFactory parserFactory;
302 /** Broadcasting listener for progress events
303 */
304 protected MultiTaskListener taskListener;
306 /**
307 * Annotation processing may require and provide a new instance
308 * of the compiler to be used for the analyze and generate phases.
309 */
310 protected JavaCompiler delegateCompiler;
312 /**
313 * Command line options.
314 */
315 protected Options options;
317 protected Context context;
319 /**
320 * Flag set if any annotation processing occurred.
321 **/
322 protected boolean annotationProcessingOccurred;
324 /**
325 * Flag set if any implicit source files read.
326 **/
327 protected boolean implicitSourceFilesRead;
329 /** Construct a new compiler using a shared context.
330 */
331 public JavaCompiler(Context context) {
332 this.context = context;
333 context.put(compilerKey, this);
335 // if fileManager not already set, register the JavacFileManager to be used
336 if (context.get(JavaFileManager.class) == null)
337 JavacFileManager.preRegister(context);
339 names = Names.instance(context);
340 log = Log.instance(context);
341 diagFactory = JCDiagnostic.Factory.instance(context);
342 reader = ClassReader.instance(context);
343 make = TreeMaker.instance(context);
344 writer = ClassWriter.instance(context);
345 jniWriter = JNIWriter.instance(context);
346 enter = Enter.instance(context);
347 todo = Todo.instance(context);
349 fileManager = context.get(JavaFileManager.class);
350 parserFactory = ParserFactory.instance(context);
352 try {
353 // catch completion problems with predefineds
354 syms = Symtab.instance(context);
355 } catch (CompletionFailure ex) {
356 // inlined Check.completionError as it is not initialized yet
357 log.error("cant.access", ex.sym, ex.getDetailValue());
358 if (ex instanceof ClassReader.BadClassFile)
359 throw new Abort();
360 }
361 source = Source.instance(context);
362 attr = Attr.instance(context);
363 chk = Check.instance(context);
364 gen = Gen.instance(context);
365 flow = Flow.instance(context);
366 transTypes = TransTypes.instance(context);
367 lower = Lower.instance(context);
368 annotate = Annotate.instance(context);
369 types = Types.instance(context);
370 taskListener = MultiTaskListener.instance(context);
372 reader.sourceCompleter = this;
374 options = Options.instance(context);
376 lambdaToMethod = LambdaToMethod.instance(context);
378 verbose = options.isSet(VERBOSE);
379 sourceOutput = options.isSet(PRINTSOURCE); // used to be -s
380 stubOutput = options.isSet("-stubs");
381 relax = options.isSet("-relax");
382 printFlat = options.isSet("-printflat");
383 attrParseOnly = options.isSet("-attrparseonly");
384 encoding = options.get(ENCODING);
385 lineDebugInfo = options.isUnset(G_CUSTOM) ||
386 options.isSet(G_CUSTOM, "lines");
387 genEndPos = options.isSet(XJCOV) ||
388 context.get(DiagnosticListener.class) != null;
389 devVerbose = options.isSet("dev");
390 processPcks = options.isSet("process.packages");
391 werror = options.isSet(WERROR);
393 if (source.compareTo(Source.DEFAULT) < 0) {
394 if (options.isUnset(XLINT_CUSTOM, "-" + LintCategory.OPTIONS.option)) {
395 if (fileManager instanceof BaseFileManager) {
396 if (((BaseFileManager) fileManager).isDefaultBootClassPath())
397 log.warning(LintCategory.OPTIONS, "source.no.bootclasspath", source.name);
398 }
399 }
400 }
402 verboseCompilePolicy = options.isSet("verboseCompilePolicy");
404 if (attrParseOnly)
405 compilePolicy = CompilePolicy.ATTR_ONLY;
406 else
407 compilePolicy = CompilePolicy.decode(options.get("compilePolicy"));
409 implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit"));
411 completionFailureName =
412 options.isSet("failcomplete")
413 ? names.fromString(options.get("failcomplete"))
414 : null;
416 shouldStopPolicyIfError =
417 options.isSet("shouldStopPolicy") // backwards compatible
418 ? CompileState.valueOf(options.get("shouldStopPolicy"))
419 : options.isSet("shouldStopPolicyIfError")
420 ? CompileState.valueOf(options.get("shouldStopPolicyIfError"))
421 : CompileState.INIT;
422 shouldStopPolicyIfNoError =
423 options.isSet("shouldStopPolicyIfNoError")
424 ? CompileState.valueOf(options.get("shouldStopPolicyIfNoError"))
425 : CompileState.GENERATE;
427 if (options.isUnset("oldDiags"))
428 log.setDiagnosticFormatter(RichDiagnosticFormatter.instance(context));
429 }
431 /* Switches:
432 */
434 /** Verbose output.
435 */
436 public boolean verbose;
438 /** Emit plain Java source files rather than class files.
439 */
440 public boolean sourceOutput;
442 /** Emit stub source files rather than class files.
443 */
444 public boolean stubOutput;
446 /** Generate attributed parse tree only.
447 */
448 public boolean attrParseOnly;
450 /** Switch: relax some constraints for producing the jsr14 prototype.
451 */
452 boolean relax;
454 /** Debug switch: Emit Java sources after inner class flattening.
455 */
456 public boolean printFlat;
458 /** The encoding to be used for source input.
459 */
460 public String encoding;
462 /** Generate code with the LineNumberTable attribute for debugging
463 */
464 public boolean lineDebugInfo;
466 /** Switch: should we store the ending positions?
467 */
468 public boolean genEndPos;
470 /** Switch: should we debug ignored exceptions
471 */
472 protected boolean devVerbose;
474 /** Switch: should we (annotation) process packages as well
475 */
476 protected boolean processPcks;
478 /** Switch: treat warnings as errors
479 */
480 protected boolean werror;
482 /** Switch: is annotation processing requested explitly via
483 * CompilationTask.setProcessors?
484 */
485 protected boolean explicitAnnotationProcessingRequested = false;
487 /**
488 * The policy for the order in which to perform the compilation
489 */
490 protected CompilePolicy compilePolicy;
492 /**
493 * The policy for what to do with implicitly read source files
494 */
495 protected ImplicitSourcePolicy implicitSourcePolicy;
497 /**
498 * Report activity related to compilePolicy
499 */
500 public boolean verboseCompilePolicy;
502 /**
503 * Policy of how far to continue compilation after errors have occurred.
504 * Set this to minimum CompileState (INIT) to stop as soon as possible
505 * after errors.
506 */
507 public CompileState shouldStopPolicyIfError;
509 /**
510 * Policy of how far to continue compilation when no errors have occurred.
511 * Set this to maximum CompileState (GENERATE) to perform full compilation.
512 * Set this lower to perform partial compilation, such as -proc:only.
513 */
514 public CompileState shouldStopPolicyIfNoError;
516 /** A queue of all as yet unattributed classes.
517 */
518 public Todo todo;
520 /** A list of items to be closed when the compilation is complete.
521 */
522 public List<Closeable> closeables = List.nil();
524 /** Ordered list of compiler phases for each compilation unit. */
525 public enum CompileState {
526 INIT(0),
527 PARSE(1),
528 ENTER(2),
529 PROCESS(3),
530 ATTR(4),
531 FLOW(5),
532 TRANSTYPES(6),
533 UNLAMBDA(7),
534 LOWER(8),
535 GENERATE(9);
537 CompileState(int value) {
538 this.value = value;
539 }
540 boolean isAfter(CompileState other) {
541 return value > other.value;
542 }
543 public static CompileState max(CompileState a, CompileState b) {
544 return a.value > b.value ? a : b;
545 }
546 private final int value;
547 };
548 /** Partial map to record which compiler phases have been executed
549 * for each compilation unit. Used for ATTR and FLOW phases.
550 */
551 protected class CompileStates extends HashMap<Env<AttrContext>,CompileState> {
552 private static final long serialVersionUID = 1812267524140424433L;
553 boolean isDone(Env<AttrContext> env, CompileState cs) {
554 CompileState ecs = get(env);
555 return (ecs != null) && !cs.isAfter(ecs);
556 }
557 }
558 private CompileStates compileStates = new CompileStates();
560 /** The set of currently compiled inputfiles, needed to ensure
561 * we don't accidentally overwrite an input file when -s is set.
562 * initialized by `compile'.
563 */
564 protected Set<JavaFileObject> inputFiles = new HashSet<JavaFileObject>();
566 protected boolean shouldStop(CompileState cs) {
567 CompileState shouldStopPolicy = (errorCount() > 0 || unrecoverableError())
568 ? shouldStopPolicyIfError
569 : shouldStopPolicyIfNoError;
570 return cs.isAfter(shouldStopPolicy);
571 }
573 /** The number of errors reported so far.
574 */
575 public int errorCount() {
576 if (delegateCompiler != null && delegateCompiler != this)
577 return delegateCompiler.errorCount();
578 else {
579 if (werror && log.nerrors == 0 && log.nwarnings > 0) {
580 log.error("warnings.and.werror");
581 }
582 }
583 return log.nerrors;
584 }
586 protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) {
587 return shouldStop(cs) ? ListBuffer.<T>lb() : queue;
588 }
590 protected final <T> List<T> stopIfError(CompileState cs, List<T> list) {
591 return shouldStop(cs) ? List.<T>nil() : list;
592 }
594 /** The number of warnings reported so far.
595 */
596 public int warningCount() {
597 if (delegateCompiler != null && delegateCompiler != this)
598 return delegateCompiler.warningCount();
599 else
600 return log.nwarnings;
601 }
603 /** Try to open input stream with given name.
604 * Report an error if this fails.
605 * @param filename The file name of the input stream to be opened.
606 */
607 public CharSequence readSource(JavaFileObject filename) {
608 try {
609 inputFiles.add(filename);
610 return filename.getCharContent(false);
611 } catch (IOException e) {
612 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
613 return null;
614 }
615 }
617 /** Parse contents of input stream.
618 * @param filename The name of the file from which input stream comes.
619 * @param content The characters to be parsed.
620 */
621 protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) {
622 long msec = now();
623 JCCompilationUnit tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(),
624 null, List.<JCTree>nil());
625 if (content != null) {
626 if (verbose) {
627 log.printVerbose("parsing.started", filename);
628 }
629 if (!taskListener.isEmpty()) {
630 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename);
631 taskListener.started(e);
632 keepComments = true;
633 genEndPos = true;
634 }
635 Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo);
636 tree = parser.parseCompilationUnit();
637 if (verbose) {
638 log.printVerbose("parsing.done", Long.toString(elapsed(msec)));
639 }
640 }
642 tree.sourcefile = filename;
644 if (content != null && !taskListener.isEmpty()) {
645 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree);
646 taskListener.finished(e);
647 }
649 return tree;
650 }
651 // where
652 public boolean keepComments = false;
653 protected boolean keepComments() {
654 return keepComments || sourceOutput || stubOutput;
655 }
658 /** Parse contents of file.
659 * @param filename The name of the file to be parsed.
660 */
661 @Deprecated
662 public JCTree.JCCompilationUnit parse(String filename) {
663 JavacFileManager fm = (JavacFileManager)fileManager;
664 return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next());
665 }
667 /** Parse contents of file.
668 * @param filename The name of the file to be parsed.
669 */
670 public JCTree.JCCompilationUnit parse(JavaFileObject filename) {
671 JavaFileObject prev = log.useSource(filename);
672 try {
673 JCTree.JCCompilationUnit t = parse(filename, readSource(filename));
674 if (t.endPositions != null)
675 log.setEndPosTable(filename, t.endPositions);
676 return t;
677 } finally {
678 log.useSource(prev);
679 }
680 }
682 /** Resolve an identifier which may be the binary name of a class or
683 * the Java name of a class or package.
684 * @param name The name to resolve
685 */
686 public Symbol resolveBinaryNameOrIdent(String name) {
687 try {
688 Name flatname = names.fromString(name.replace("/", "."));
689 return reader.loadClass(flatname);
690 } catch (CompletionFailure ignore) {
691 return resolveIdent(name);
692 }
693 }
695 /** Resolve an identifier.
696 * @param name The identifier to resolve
697 */
698 public Symbol resolveIdent(String name) {
699 if (name.equals(""))
700 return syms.errSymbol;
701 JavaFileObject prev = log.useSource(null);
702 try {
703 JCExpression tree = null;
704 for (String s : name.split("\\.", -1)) {
705 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords
706 return syms.errSymbol;
707 tree = (tree == null) ? make.Ident(names.fromString(s))
708 : make.Select(tree, names.fromString(s));
709 }
710 JCCompilationUnit toplevel =
711 make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
712 toplevel.packge = syms.unnamedPackage;
713 return attr.attribIdent(tree, toplevel);
714 } finally {
715 log.useSource(prev);
716 }
717 }
719 /** Emit plain Java source for a class.
720 * @param env The attribution environment of the outermost class
721 * containing this class.
722 * @param cdef The class definition to be printed.
723 */
724 JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
725 JavaFileObject outFile
726 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
727 cdef.sym.flatname.toString(),
728 JavaFileObject.Kind.SOURCE,
729 null);
730 if (inputFiles.contains(outFile)) {
731 log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile);
732 return null;
733 } else {
734 BufferedWriter out = new BufferedWriter(outFile.openWriter());
735 try {
736 new Pretty(out, true).printUnit(env.toplevel, cdef);
737 if (verbose)
738 log.printVerbose("wrote.file", outFile);
739 } finally {
740 out.close();
741 }
742 return outFile;
743 }
744 }
746 /** Generate code and emit a class file for a given class
747 * @param env The attribution environment of the outermost class
748 * containing this class.
749 * @param cdef The class definition from which code is generated.
750 */
751 JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
752 try {
753 if (gen.genClass(env, cdef) && (errorCount() == 0))
754 return writer.writeClass(cdef.sym);
755 } catch (ClassWriter.PoolOverflow ex) {
756 log.error(cdef.pos(), "limit.pool");
757 } catch (ClassWriter.StringOverflow ex) {
758 log.error(cdef.pos(), "limit.string.overflow",
759 ex.value.substring(0, 20));
760 } catch (CompletionFailure ex) {
761 chk.completionError(cdef.pos(), ex);
762 }
763 return null;
764 }
766 /** Complete compiling a source file that has been accessed
767 * by the class file reader.
768 * @param c The class the source file of which needs to be compiled.
769 */
770 public void complete(ClassSymbol c) throws CompletionFailure {
771 // System.err.println("completing " + c);//DEBUG
772 if (completionFailureName == c.fullname) {
773 throw new CompletionFailure(c, "user-selected completion failure by class name");
774 }
775 JCCompilationUnit tree;
776 JavaFileObject filename = c.classfile;
777 JavaFileObject prev = log.useSource(filename);
779 try {
780 tree = parse(filename, filename.getCharContent(false));
781 } catch (IOException e) {
782 log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
783 tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
784 } finally {
785 log.useSource(prev);
786 }
788 if (!taskListener.isEmpty()) {
789 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
790 taskListener.started(e);
791 }
793 enter.complete(List.of(tree), c);
795 if (!taskListener.isEmpty()) {
796 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
797 taskListener.finished(e);
798 }
800 if (enter.getEnv(c) == null) {
801 boolean isPkgInfo =
802 tree.sourcefile.isNameCompatible("package-info",
803 JavaFileObject.Kind.SOURCE);
804 if (isPkgInfo) {
805 if (enter.getEnv(tree.packge) == null) {
806 JCDiagnostic diag =
807 diagFactory.fragment("file.does.not.contain.package",
808 c.location());
809 throw reader.new BadClassFile(c, filename, diag);
810 }
811 } else {
812 JCDiagnostic diag =
813 diagFactory.fragment("file.doesnt.contain.class",
814 c.getQualifiedName());
815 throw reader.new BadClassFile(c, filename, diag);
816 }
817 }
819 implicitSourceFilesRead = true;
820 }
822 /** Track when the JavaCompiler has been used to compile something. */
823 private boolean hasBeenUsed = false;
824 private long start_msec = 0;
825 public long elapsed_msec = 0;
827 public void compile(List<JavaFileObject> sourceFileObject)
828 throws Throwable {
829 compile(sourceFileObject, List.<String>nil(), null);
830 }
832 /**
833 * Main method: compile a list of files, return all compiled classes
834 *
835 * @param sourceFileObjects file objects to be compiled
836 * @param classnames class names to process for annotations
837 * @param processors user provided annotation processors to bypass
838 * discovery, {@code null} means that no processors were provided
839 */
840 public void compile(List<JavaFileObject> sourceFileObjects,
841 List<String> classnames,
842 Iterable<? extends Processor> processors)
843 {
844 if (processors != null && processors.iterator().hasNext())
845 explicitAnnotationProcessingRequested = true;
846 // as a JavaCompiler can only be used once, throw an exception if
847 // it has been used before.
848 if (hasBeenUsed)
849 throw new AssertionError("attempt to reuse JavaCompiler");
850 hasBeenUsed = true;
852 // forcibly set the equivalent of -Xlint:-options, so that no further
853 // warnings about command line options are generated from this point on
854 options.put(XLINT_CUSTOM.text + "-" + LintCategory.OPTIONS.option, "true");
855 options.remove(XLINT_CUSTOM.text + LintCategory.OPTIONS.option);
857 start_msec = now();
859 try {
860 initProcessAnnotations(processors);
862 // These method calls must be chained to avoid memory leaks
863 delegateCompiler =
864 processAnnotations(
865 enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))),
866 classnames);
868 delegateCompiler.compile2();
869 delegateCompiler.close();
870 elapsed_msec = delegateCompiler.elapsed_msec;
871 } catch (Abort ex) {
872 if (devVerbose)
873 ex.printStackTrace(System.err);
874 } finally {
875 if (procEnvImpl != null)
876 procEnvImpl.close();
877 }
878 }
880 /**
881 * The phases following annotation processing: attribution,
882 * desugar, and finally code generation.
883 */
884 private void compile2() {
885 try {
886 switch (compilePolicy) {
887 case ATTR_ONLY:
888 attribute(todo);
889 break;
891 case CHECK_ONLY:
892 flow(attribute(todo));
893 break;
895 case SIMPLE:
896 generate(desugar(flow(attribute(todo))));
897 break;
899 case BY_FILE: {
900 Queue<Queue<Env<AttrContext>>> q = todo.groupByFile();
901 while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) {
902 generate(desugar(flow(attribute(q.remove()))));
903 }
904 }
905 break;
907 case BY_TODO:
908 while (!todo.isEmpty())
909 generate(desugar(flow(attribute(todo.remove()))));
910 break;
912 default:
913 Assert.error("unknown compile policy");
914 }
915 } catch (Abort ex) {
916 if (devVerbose)
917 ex.printStackTrace(System.err);
918 }
920 if (verbose) {
921 elapsed_msec = elapsed(start_msec);
922 log.printVerbose("total", Long.toString(elapsed_msec));
923 }
925 reportDeferredDiagnostics();
927 if (!log.hasDiagnosticListener()) {
928 printCount("error", errorCount());
929 printCount("warn", warningCount());
930 }
931 }
933 /**
934 * Set needRootClasses to true, in JavaCompiler subclass constructor
935 * that want to collect public apis of classes supplied on the command line.
936 */
937 protected boolean needRootClasses = false;
939 /**
940 * The list of classes explicitly supplied on the command line for compilation.
941 * Not always populated.
942 */
943 private List<JCClassDecl> rootClasses;
945 /**
946 * Parses a list of files.
947 */
948 public List<JCCompilationUnit> parseFiles(Iterable<JavaFileObject> fileObjects) {
949 if (shouldStop(CompileState.PARSE))
950 return List.nil();
952 //parse all files
953 ListBuffer<JCCompilationUnit> trees = lb();
954 Set<JavaFileObject> filesSoFar = new HashSet<JavaFileObject>();
955 for (JavaFileObject fileObject : fileObjects) {
956 if (!filesSoFar.contains(fileObject)) {
957 filesSoFar.add(fileObject);
958 trees.append(parse(fileObject));
959 }
960 }
961 return trees.toList();
962 }
964 /**
965 * Enter the symbols found in a list of parse trees if the compilation
966 * is expected to proceed beyond anno processing into attr.
967 * As a side-effect, this puts elements on the "todo" list.
968 * Also stores a list of all top level classes in rootClasses.
969 */
970 public List<JCCompilationUnit> enterTreesIfNeeded(List<JCCompilationUnit> roots) {
971 if (shouldStop(CompileState.ATTR))
972 return List.nil();
973 return enterTrees(roots);
974 }
976 /**
977 * Enter the symbols found in a list of parse trees.
978 * As a side-effect, this puts elements on the "todo" list.
979 * Also stores a list of all top level classes in rootClasses.
980 */
981 public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) {
982 //enter symbols for all files
983 if (!taskListener.isEmpty()) {
984 for (JCCompilationUnit unit: roots) {
985 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
986 taskListener.started(e);
987 }
988 }
990 enter.main(roots);
992 if (!taskListener.isEmpty()) {
993 for (JCCompilationUnit unit: roots) {
994 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
995 taskListener.finished(e);
996 }
997 }
999 // If generating source, or if tracking public apis,
1000 // then remember the classes declared in
1001 // the original compilation units listed on the command line.
1002 if (needRootClasses || sourceOutput || stubOutput) {
1003 ListBuffer<JCClassDecl> cdefs = lb();
1004 for (JCCompilationUnit unit : roots) {
1005 for (List<JCTree> defs = unit.defs;
1006 defs.nonEmpty();
1007 defs = defs.tail) {
1008 if (defs.head instanceof JCClassDecl)
1009 cdefs.append((JCClassDecl)defs.head);
1010 }
1011 }
1012 rootClasses = cdefs.toList();
1013 }
1015 // Ensure the input files have been recorded. Although this is normally
1016 // done by readSource, it may not have been done if the trees were read
1017 // in a prior round of annotation processing, and the trees have been
1018 // cleaned and are being reused.
1019 for (JCCompilationUnit unit : roots) {
1020 inputFiles.add(unit.sourcefile);
1021 }
1023 return roots;
1024 }
1026 /**
1027 * Set to true to enable skeleton annotation processing code.
1028 * Currently, we assume this variable will be replaced more
1029 * advanced logic to figure out if annotation processing is
1030 * needed.
1031 */
1032 boolean processAnnotations = false;
1034 Log.DeferredDiagnosticHandler deferredDiagnosticHandler;
1036 /**
1037 * Object to handle annotation processing.
1038 */
1039 private JavacProcessingEnvironment procEnvImpl = null;
1041 /**
1042 * Check if we should process annotations.
1043 * If so, and if no scanner is yet registered, then set up the DocCommentScanner
1044 * to catch doc comments, and set keepComments so the parser records them in
1045 * the compilation unit.
1046 *
1047 * @param processors user provided annotation processors to bypass
1048 * discovery, {@code null} means that no processors were provided
1049 */
1050 public void initProcessAnnotations(Iterable<? extends Processor> processors) {
1051 // Process annotations if processing is not disabled and there
1052 // is at least one Processor available.
1053 if (options.isSet(PROC, "none")) {
1054 processAnnotations = false;
1055 } else if (procEnvImpl == null) {
1056 procEnvImpl = JavacProcessingEnvironment.instance(context);
1057 procEnvImpl.setProcessors(processors);
1058 processAnnotations = procEnvImpl.atLeastOneProcessor();
1060 if (processAnnotations) {
1061 options.put("save-parameter-names", "save-parameter-names");
1062 reader.saveParameterNames = true;
1063 keepComments = true;
1064 genEndPos = true;
1065 if (!taskListener.isEmpty())
1066 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
1067 deferredDiagnosticHandler = new Log.DeferredDiagnosticHandler(log);
1068 } else { // free resources
1069 procEnvImpl.close();
1070 }
1071 }
1072 }
1074 // TODO: called by JavacTaskImpl
1075 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots) {
1076 return processAnnotations(roots, List.<String>nil());
1077 }
1079 /**
1080 * Process any annotations found in the specified compilation units.
1081 * @param roots a list of compilation units
1082 * @return an instance of the compiler in which to complete the compilation
1083 */
1084 // Implementation note: when this method is called, log.deferredDiagnostics
1085 // will have been set true by initProcessAnnotations, meaning that any diagnostics
1086 // that are reported will go into the log.deferredDiagnostics queue.
1087 // By the time this method exits, log.deferDiagnostics must be set back to false,
1088 // and all deferredDiagnostics must have been handled: i.e. either reported
1089 // or determined to be transient, and therefore suppressed.
1090 public JavaCompiler processAnnotations(List<JCCompilationUnit> roots,
1091 List<String> classnames) {
1092 if (shouldStop(CompileState.PROCESS)) {
1093 // Errors were encountered.
1094 // Unless all the errors are resolve errors, the errors were parse errors
1095 // or other errors during enter which cannot be fixed by running
1096 // any annotation processors.
1097 if (unrecoverableError()) {
1098 deferredDiagnosticHandler.reportDeferredDiagnostics();
1099 log.popDiagnosticHandler(deferredDiagnosticHandler);
1100 return this;
1101 }
1102 }
1104 // ASSERT: processAnnotations and procEnvImpl should have been set up by
1105 // by initProcessAnnotations
1107 // NOTE: The !classnames.isEmpty() checks should be refactored to Main.
1109 if (!processAnnotations) {
1110 // If there are no annotation processors present, and
1111 // annotation processing is to occur with compilation,
1112 // emit a warning.
1113 if (options.isSet(PROC, "only")) {
1114 log.warning("proc.proc-only.requested.no.procs");
1115 todo.clear();
1116 }
1117 // If not processing annotations, classnames must be empty
1118 if (!classnames.isEmpty()) {
1119 log.error("proc.no.explicit.annotation.processing.requested",
1120 classnames);
1121 }
1122 Assert.checkNull(deferredDiagnosticHandler);
1123 return this; // continue regular compilation
1124 }
1126 Assert.checkNonNull(deferredDiagnosticHandler);
1128 try {
1129 List<ClassSymbol> classSymbols = List.nil();
1130 List<PackageSymbol> pckSymbols = List.nil();
1131 if (!classnames.isEmpty()) {
1132 // Check for explicit request for annotation
1133 // processing
1134 if (!explicitAnnotationProcessingRequested()) {
1135 log.error("proc.no.explicit.annotation.processing.requested",
1136 classnames);
1137 deferredDiagnosticHandler.reportDeferredDiagnostics();
1138 log.popDiagnosticHandler(deferredDiagnosticHandler);
1139 return this; // TODO: Will this halt compilation?
1140 } else {
1141 boolean errors = false;
1142 for (String nameStr : classnames) {
1143 Symbol sym = resolveBinaryNameOrIdent(nameStr);
1144 if (sym == null ||
1145 (sym.kind == Kinds.PCK && !processPcks) ||
1146 sym.kind == Kinds.ABSENT_TYP) {
1147 log.error("proc.cant.find.class", nameStr);
1148 errors = true;
1149 continue;
1150 }
1151 try {
1152 if (sym.kind == Kinds.PCK)
1153 sym.complete();
1154 if (sym.exists()) {
1155 if (sym.kind == Kinds.PCK)
1156 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1157 else
1158 classSymbols = classSymbols.prepend((ClassSymbol)sym);
1159 continue;
1160 }
1161 Assert.check(sym.kind == Kinds.PCK);
1162 log.warning("proc.package.does.not.exist", nameStr);
1163 pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
1164 } catch (CompletionFailure e) {
1165 log.error("proc.cant.find.class", nameStr);
1166 errors = true;
1167 continue;
1168 }
1169 }
1170 if (errors) {
1171 deferredDiagnosticHandler.reportDeferredDiagnostics();
1172 log.popDiagnosticHandler(deferredDiagnosticHandler);
1173 return this;
1174 }
1175 }
1176 }
1177 try {
1178 JavaCompiler c = procEnvImpl.doProcessing(context, roots, classSymbols, pckSymbols,
1179 deferredDiagnosticHandler);
1180 if (c != this)
1181 annotationProcessingOccurred = c.annotationProcessingOccurred = true;
1182 // doProcessing will have handled deferred diagnostics
1183 return c;
1184 } finally {
1185 procEnvImpl.close();
1186 }
1187 } catch (CompletionFailure ex) {
1188 log.error("cant.access", ex.sym, ex.getDetailValue());
1189 deferredDiagnosticHandler.reportDeferredDiagnostics();
1190 log.popDiagnosticHandler(deferredDiagnosticHandler);
1191 return this;
1192 }
1193 }
1195 private boolean unrecoverableError() {
1196 if (deferredDiagnosticHandler != null) {
1197 for (JCDiagnostic d: deferredDiagnosticHandler.getDiagnostics()) {
1198 if (d.getKind() == JCDiagnostic.Kind.ERROR && !d.isFlagSet(RECOVERABLE))
1199 return true;
1200 }
1201 }
1202 return false;
1203 }
1205 boolean explicitAnnotationProcessingRequested() {
1206 return
1207 explicitAnnotationProcessingRequested ||
1208 explicitAnnotationProcessingRequested(options);
1209 }
1211 static boolean explicitAnnotationProcessingRequested(Options options) {
1212 return
1213 options.isSet(PROCESSOR) ||
1214 options.isSet(PROCESSORPATH) ||
1215 options.isSet(PROC, "only") ||
1216 options.isSet(XPRINT);
1217 }
1219 /**
1220 * Attribute a list of parse trees, such as found on the "todo" list.
1221 * Note that attributing classes may cause additional files to be
1222 * parsed and entered via the SourceCompleter.
1223 * Attribution of the entries in the list does not stop if any errors occur.
1224 * @returns a list of environments for attributd classes.
1225 */
1226 public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) {
1227 ListBuffer<Env<AttrContext>> results = lb();
1228 while (!envs.isEmpty())
1229 results.append(attribute(envs.remove()));
1230 return stopIfError(CompileState.ATTR, results);
1231 }
1233 /**
1234 * Attribute a parse tree.
1235 * @returns the attributed parse tree
1236 */
1237 public Env<AttrContext> attribute(Env<AttrContext> env) {
1238 if (compileStates.isDone(env, CompileState.ATTR))
1239 return env;
1241 if (verboseCompilePolicy)
1242 printNote("[attribute " + env.enclClass.sym + "]");
1243 if (verbose)
1244 log.printVerbose("checking.attribution", env.enclClass.sym);
1246 if (!taskListener.isEmpty()) {
1247 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1248 taskListener.started(e);
1249 }
1251 JavaFileObject prev = log.useSource(
1252 env.enclClass.sym.sourcefile != null ?
1253 env.enclClass.sym.sourcefile :
1254 env.toplevel.sourcefile);
1255 try {
1256 attr.attrib(env);
1257 if (errorCount() > 0 && !shouldStop(CompileState.ATTR)) {
1258 //if in fail-over mode, ensure that AST expression nodes
1259 //are correctly initialized (e.g. they have a type/symbol)
1260 attr.postAttr(env.tree);
1261 }
1262 compileStates.put(env, CompileState.ATTR);
1263 if (rootClasses != null && rootClasses.contains(env.enclClass)) {
1264 // This was a class that was explicitly supplied for compilation.
1265 // If we want to capture the public api of this class,
1266 // then now is a good time to do it.
1267 reportPublicApi(env.enclClass.sym);
1268 }
1269 }
1270 finally {
1271 log.useSource(prev);
1272 }
1274 return env;
1275 }
1277 /** Report the public api of a class that was supplied explicitly for compilation,
1278 * for example on the command line to javac.
1279 * @param sym The symbol of the class.
1280 */
1281 public void reportPublicApi(ClassSymbol sym) {
1282 // Override to collect the reported public api.
1283 }
1285 /**
1286 * Perform dataflow checks on attributed parse trees.
1287 * These include checks for definite assignment and unreachable statements.
1288 * If any errors occur, an empty list will be returned.
1289 * @returns the list of attributed parse trees
1290 */
1291 public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) {
1292 ListBuffer<Env<AttrContext>> results = lb();
1293 for (Env<AttrContext> env: envs) {
1294 flow(env, results);
1295 }
1296 return stopIfError(CompileState.FLOW, results);
1297 }
1299 /**
1300 * Perform dataflow checks on an attributed parse tree.
1301 */
1302 public Queue<Env<AttrContext>> flow(Env<AttrContext> env) {
1303 ListBuffer<Env<AttrContext>> results = lb();
1304 flow(env, results);
1305 return stopIfError(CompileState.FLOW, results);
1306 }
1308 /**
1309 * Perform dataflow checks on an attributed parse tree.
1310 */
1311 protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) {
1312 try {
1313 if (shouldStop(CompileState.FLOW))
1314 return;
1316 if (relax || compileStates.isDone(env, CompileState.FLOW)) {
1317 results.add(env);
1318 return;
1319 }
1321 if (verboseCompilePolicy)
1322 printNote("[flow " + env.enclClass.sym + "]");
1323 JavaFileObject prev = log.useSource(
1324 env.enclClass.sym.sourcefile != null ?
1325 env.enclClass.sym.sourcefile :
1326 env.toplevel.sourcefile);
1327 try {
1328 make.at(Position.FIRSTPOS);
1329 TreeMaker localMake = make.forToplevel(env.toplevel);
1330 flow.analyzeTree(env, localMake);
1331 compileStates.put(env, CompileState.FLOW);
1333 if (shouldStop(CompileState.FLOW))
1334 return;
1336 results.add(env);
1337 }
1338 finally {
1339 log.useSource(prev);
1340 }
1341 }
1342 finally {
1343 if (!taskListener.isEmpty()) {
1344 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
1345 taskListener.finished(e);
1346 }
1347 }
1348 }
1350 /**
1351 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1352 * for source or code generation.
1353 * If any errors occur, an empty list will be returned.
1354 * @returns a list containing the classes to be generated
1355 */
1356 public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) {
1357 ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = lb();
1358 for (Env<AttrContext> env: envs)
1359 desugar(env, results);
1360 return stopIfError(CompileState.FLOW, results);
1361 }
1363 HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>> desugaredEnvs =
1364 new HashMap<Env<AttrContext>, Queue<Pair<Env<AttrContext>, JCClassDecl>>>();
1366 /**
1367 * Prepare attributed parse trees, in conjunction with their attribution contexts,
1368 * for source or code generation. If the file was not listed on the command line,
1369 * the current implicitSourcePolicy is taken into account.
1370 * The preparation stops as soon as an error is found.
1371 */
1372 protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) {
1373 if (shouldStop(CompileState.TRANSTYPES))
1374 return;
1376 if (implicitSourcePolicy == ImplicitSourcePolicy.NONE
1377 && !inputFiles.contains(env.toplevel.sourcefile)) {
1378 return;
1379 }
1381 if (compileStates.isDone(env, CompileState.LOWER)) {
1382 results.addAll(desugaredEnvs.get(env));
1383 return;
1384 }
1386 /**
1387 * Ensure that superclasses of C are desugared before C itself. This is
1388 * required for two reasons: (i) as erasure (TransTypes) destroys
1389 * information needed in flow analysis and (ii) as some checks carried
1390 * out during lowering require that all synthetic fields/methods have
1391 * already been added to C and its superclasses.
1392 */
1393 class ScanNested extends TreeScanner {
1394 Set<Env<AttrContext>> dependencies = new LinkedHashSet<Env<AttrContext>>();
1395 @Override
1396 public void visitClassDef(JCClassDecl node) {
1397 Type st = types.supertype(node.sym.type);
1398 if (st.hasTag(CLASS)) {
1399 ClassSymbol c = st.tsym.outermostClass();
1400 Env<AttrContext> stEnv = enter.getEnv(c);
1401 if (stEnv != null && env != stEnv) {
1402 if (dependencies.add(stEnv))
1403 scan(stEnv.tree);
1404 }
1405 }
1406 super.visitClassDef(node);
1407 }
1408 }
1409 ScanNested scanner = new ScanNested();
1410 scanner.scan(env.tree);
1411 for (Env<AttrContext> dep: scanner.dependencies) {
1412 if (!compileStates.isDone(dep, CompileState.FLOW))
1413 desugaredEnvs.put(dep, desugar(flow(attribute(dep))));
1414 }
1416 //We need to check for error another time as more classes might
1417 //have been attributed and analyzed at this stage
1418 if (shouldStop(CompileState.TRANSTYPES))
1419 return;
1421 if (verboseCompilePolicy)
1422 printNote("[desugar " + env.enclClass.sym + "]");
1424 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1425 env.enclClass.sym.sourcefile :
1426 env.toplevel.sourcefile);
1427 try {
1428 //save tree prior to rewriting
1429 JCTree untranslated = env.tree;
1431 make.at(Position.FIRSTPOS);
1432 TreeMaker localMake = make.forToplevel(env.toplevel);
1434 if (env.tree instanceof JCCompilationUnit) {
1435 if (!(stubOutput || sourceOutput || printFlat)) {
1436 if (shouldStop(CompileState.LOWER))
1437 return;
1438 List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake);
1439 if (pdef.head != null) {
1440 Assert.check(pdef.tail.isEmpty());
1441 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, (JCClassDecl)pdef.head));
1442 }
1443 }
1444 return;
1445 }
1447 if (stubOutput) {
1448 //emit stub Java source file, only for compilation
1449 //units enumerated explicitly on the command line
1450 JCClassDecl cdef = (JCClassDecl)env.tree;
1451 if (untranslated instanceof JCClassDecl &&
1452 rootClasses.contains((JCClassDecl)untranslated) &&
1453 ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1454 cdef.sym.packge().getQualifiedName() == names.java_lang)) {
1455 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, removeMethodBodies(cdef)));
1456 }
1457 return;
1458 }
1460 if (shouldStop(CompileState.TRANSTYPES))
1461 return;
1463 env.tree = transTypes.translateTopLevelClass(env.tree, localMake);
1464 compileStates.put(env, CompileState.TRANSTYPES);
1466 if (shouldStop(CompileState.UNLAMBDA))
1467 return;
1469 env.tree = lambdaToMethod.translateTopLevelClass(env, env.tree, localMake);
1470 compileStates.put(env, CompileState.UNLAMBDA);
1472 if (shouldStop(CompileState.LOWER))
1473 return;
1475 if (sourceOutput) {
1476 //emit standard Java source file, only for compilation
1477 //units enumerated explicitly on the command line
1478 JCClassDecl cdef = (JCClassDecl)env.tree;
1479 if (untranslated instanceof JCClassDecl &&
1480 rootClasses.contains((JCClassDecl)untranslated)) {
1481 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1482 }
1483 return;
1484 }
1486 //translate out inner classes
1487 List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake);
1488 compileStates.put(env, CompileState.LOWER);
1490 if (shouldStop(CompileState.LOWER))
1491 return;
1493 //generate code for each class
1494 for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) {
1495 JCClassDecl cdef = (JCClassDecl)l.head;
1496 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
1497 }
1498 }
1499 finally {
1500 log.useSource(prev);
1501 }
1503 }
1505 /** Generates the source or class file for a list of classes.
1506 * The decision to generate a source file or a class file is
1507 * based upon the compiler's options.
1508 * Generation stops if an error occurs while writing files.
1509 */
1510 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) {
1511 generate(queue, null);
1512 }
1514 public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) {
1515 if (shouldStop(CompileState.GENERATE))
1516 return;
1518 boolean usePrintSource = (stubOutput || sourceOutput || printFlat);
1520 for (Pair<Env<AttrContext>, JCClassDecl> x: queue) {
1521 Env<AttrContext> env = x.fst;
1522 JCClassDecl cdef = x.snd;
1524 if (verboseCompilePolicy) {
1525 printNote("[generate "
1526 + (usePrintSource ? " source" : "code")
1527 + " " + cdef.sym + "]");
1528 }
1530 if (!taskListener.isEmpty()) {
1531 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1532 taskListener.started(e);
1533 }
1535 JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
1536 env.enclClass.sym.sourcefile :
1537 env.toplevel.sourcefile);
1538 try {
1539 JavaFileObject file;
1540 if (usePrintSource)
1541 file = printSource(env, cdef);
1542 else {
1543 if (fileManager.hasLocation(StandardLocation.NATIVE_HEADER_OUTPUT)
1544 && jniWriter.needsHeader(cdef.sym)) {
1545 jniWriter.write(cdef.sym);
1546 }
1547 file = genCode(env, cdef);
1548 }
1549 if (results != null && file != null)
1550 results.add(file);
1551 } catch (IOException ex) {
1552 log.error(cdef.pos(), "class.cant.write",
1553 cdef.sym, ex.getMessage());
1554 return;
1555 } finally {
1556 log.useSource(prev);
1557 }
1559 if (!taskListener.isEmpty()) {
1560 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
1561 taskListener.finished(e);
1562 }
1563 }
1564 }
1566 // where
1567 Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) {
1568 // use a LinkedHashMap to preserve the order of the original list as much as possible
1569 Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<JCCompilationUnit, Queue<Env<AttrContext>>>();
1570 for (Env<AttrContext> env: envs) {
1571 Queue<Env<AttrContext>> sublist = map.get(env.toplevel);
1572 if (sublist == null) {
1573 sublist = new ListBuffer<Env<AttrContext>>();
1574 map.put(env.toplevel, sublist);
1575 }
1576 sublist.add(env);
1577 }
1578 return map;
1579 }
1581 JCClassDecl removeMethodBodies(JCClassDecl cdef) {
1582 final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0;
1583 class MethodBodyRemover extends TreeTranslator {
1584 @Override
1585 public void visitMethodDef(JCMethodDecl tree) {
1586 tree.mods.flags &= ~Flags.SYNCHRONIZED;
1587 for (JCVariableDecl vd : tree.params)
1588 vd.mods.flags &= ~Flags.FINAL;
1589 tree.body = null;
1590 super.visitMethodDef(tree);
1591 }
1592 @Override
1593 public void visitVarDef(JCVariableDecl tree) {
1594 if (tree.init != null && tree.init.type.constValue() == null)
1595 tree.init = null;
1596 super.visitVarDef(tree);
1597 }
1598 @Override
1599 public void visitClassDef(JCClassDecl tree) {
1600 ListBuffer<JCTree> newdefs = lb();
1601 for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
1602 JCTree t = it.head;
1603 switch (t.getTag()) {
1604 case CLASSDEF:
1605 if (isInterface ||
1606 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1607 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1608 newdefs.append(t);
1609 break;
1610 case METHODDEF:
1611 if (isInterface ||
1612 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1613 ((JCMethodDecl) t).sym.name == names.init ||
1614 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1615 newdefs.append(t);
1616 break;
1617 case VARDEF:
1618 if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
1619 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang)
1620 newdefs.append(t);
1621 break;
1622 default:
1623 break;
1624 }
1625 }
1626 tree.defs = newdefs.toList();
1627 super.visitClassDef(tree);
1628 }
1629 }
1630 MethodBodyRemover r = new MethodBodyRemover();
1631 return r.translate(cdef);
1632 }
1634 public void reportDeferredDiagnostics() {
1635 if (errorCount() == 0
1636 && annotationProcessingOccurred
1637 && implicitSourceFilesRead
1638 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) {
1639 if (explicitAnnotationProcessingRequested())
1640 log.warning("proc.use.implicit");
1641 else
1642 log.warning("proc.use.proc.or.implicit");
1643 }
1644 chk.reportDeferredDiagnostics();
1645 }
1647 /** Close the compiler, flushing the logs
1648 */
1649 public void close() {
1650 close(true);
1651 }
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;
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;
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 }
1697 }
1699 protected void printNote(String lines) {
1700 log.printRawLines(Log.WriterKind.NOTICE, lines);
1701 }
1703 /** Print numbers of errors and warnings.
1704 */
1705 public void printCount(String kind, int count) {
1706 if (count != 0) {
1707 String key;
1708 if (count == 1)
1709 key = "count." + kind;
1710 else
1711 key = "count." + kind + ".plural";
1712 log.printLines(WriterKind.ERROR, key, String.valueOf(count));
1713 log.flush(Log.WriterKind.ERROR);
1714 }
1715 }
1717 private static long now() {
1718 return System.currentTimeMillis();
1719 }
1721 private static long elapsed(long then) {
1722 return now() - then;
1723 }
1725 public void initRound(JavaCompiler prev) {
1726 genEndPos = prev.genEndPos;
1727 keepComments = prev.keepComments;
1728 start_msec = prev.start_msec;
1729 hasBeenUsed = true;
1730 closeables = prev.closeables;
1731 prev.closeables = List.nil();
1732 shouldStopPolicyIfError = prev.shouldStopPolicyIfError;
1733 shouldStopPolicyIfNoError = prev.shouldStopPolicyIfNoError;
1734 }
1736 public static void enableLogging() {
1737 Logger logger = Logger.getLogger(com.sun.tools.javac.Main.class.getPackage().getName());
1738 logger.setLevel(Level.ALL);
1739 for (Handler h : logger.getParent().getHandlers()) {
1740 h.setLevel(Level.ALL);
1741 }
1743 }
1744 }