jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/main/JavaCompiler.java@79eb8795a1de (annotated)

src/share/classes/com/sun/tools/javac/main/JavaCompiler.java@79eb8795a1de (annotated)

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

Wed, 20 May 2009 13:36:23 -0700

author: jjg
date: Wed, 20 May 2009 13:36:23 -0700
changeset 286: 79eb8795a1de
parent 257: af10262bd031
child 288: d402db1005ad
permissions: -rw-r--r--

6827026: Change javac source and target default to 7
Reviewed-by: darcy, ohair

 /*
  * Copyright 1999-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Sun designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Sun in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 package com.sun.tools.javac.main;
 import java.io.*;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.MissingResourceException;
 import java.util.ResourceBundle;
 import java.util.Set;
 import java.util.logging.Handler;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import javax.tools.JavaFileManager;
 import javax.tools.JavaFileObject;
 import javax.tools.DiagnosticListener;
 import com.sun.tools.javac.file.JavacFileManager;
 import com.sun.source.util.TaskEvent;
 import com.sun.source.util.TaskListener;
 import com.sun.tools.javac.util.*;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.tree.*;
 import com.sun.tools.javac.parser.*;
 import com.sun.tools.javac.comp.*;
 import com.sun.tools.javac.jvm.*;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.processing.*;
 import javax.annotation.processing.Processor;
 import static javax.tools.StandardLocation.CLASS_OUTPUT;
 import static com.sun.tools.javac.util.ListBuffer.lb;
 // TEMP, until we have a more efficient way to save doc comment info
 import com.sun.tools.javac.parser.DocCommentScanner;
 import java.util.HashMap;
 import java.util.Queue;
 import javax.lang.model.SourceVersion;
 /** This class could be the main entry point for GJC when GJC is used as a
  *  component in a larger software system. It provides operations to
  *  construct a new compiler, and to run a new compiler on a set of source
  *  files.
  *
  *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
  *  you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class JavaCompiler implements ClassReader.SourceCompleter {
     /** The context key for the compiler. */
     protected static final Context.Key<JavaCompiler> compilerKey =
         new Context.Key<JavaCompiler>();
     /** Get the JavaCompiler instance for this context. */
     public static JavaCompiler instance(Context context) {
         JavaCompiler instance = context.get(compilerKey);
         if (instance == null)
             instance = new JavaCompiler(context);
         return instance;
     }
     /** The current version number as a string.
      */
     public static String version() {
         return version("release");  // mm.nn.oo[-milestone]
     }
     /** The current full version number as a string.
      */
     public static String fullVersion() {
         return version("full"); // mm.mm.oo[-milestone]-build
     }
     private static final String versionRBName = "com.sun.tools.javac.resources.version";
     private static ResourceBundle versionRB;
     private static String version(String key) {
         if (versionRB == null) {
             try {
                 versionRB = ResourceBundle.getBundle(versionRBName);
             } catch (MissingResourceException e) {
                 return Log.getLocalizedString("version.resource.missing", System.getProperty("java.version"));
             }
         }
         try {
             return versionRB.getString(key);
         }
         catch (MissingResourceException e) {
             return Log.getLocalizedString("version.unknown", System.getProperty("java.version"));
         }
     }
     /**
      * Control how the compiler's latter phases (attr, flow, desugar, generate)
      * are connected. Each individual file is processed by each phase in turn,
      * but with different compile policies, you can control the order in which
      * each class is processed through its next phase.
      *
      * <p>Generally speaking, the compiler will "fail fast" in the face of
      * errors, although not aggressively so. flow, desugar, etc become no-ops
      * once any errors have occurred. No attempt is currently made to determine
      * if it might be safe to process a class through its next phase because
      * it does not depend on any unrelated errors that might have occurred.
      */
     protected static enum CompilePolicy {
         /**
          * Just attribute the parse trees.
          */
         ATTR_ONLY,
         /**
          * Just attribute and do flow analysis on the parse trees.
          * This should catch most user errors.
          */
         CHECK_ONLY,
         /**
          * Attribute everything, then do flow analysis for everything,
          * then desugar everything, and only then generate output.
          * This means no output will be generated if there are any
          * errors in any classes.
          */
         SIMPLE,
         /**
          * Groups the classes for each source file together, then process
          * each group in a manner equivalent to the {@code SIMPLE} policy.
          * This means no output will be generated if there are any
          * errors in any of the classes in a source file.
          */
         BY_FILE,
         /**
          * Completely process each entry on the todo list in turn.
          * -- this is the same for 1.5.
          * Means output might be generated for some classes in a compilation unit
          * and not others.
          */
         BY_TODO;
         static CompilePolicy decode(String option) {
             if (option == null)
                 return DEFAULT_COMPILE_POLICY;
             else if (option.equals("attr"))
                 return ATTR_ONLY;
             else if (option.equals("check"))
                 return CHECK_ONLY;
             else if (option.equals("simple"))
                 return SIMPLE;
             else if (option.equals("byfile"))
                 return BY_FILE;
             else if (option.equals("bytodo"))
                 return BY_TODO;
             else
                 return DEFAULT_COMPILE_POLICY;
         }
     }
     private static CompilePolicy DEFAULT_COMPILE_POLICY = CompilePolicy.BY_TODO;
     protected static enum ImplicitSourcePolicy {
         /** Don't generate or process implicitly read source files. */
         NONE,
         /** Generate classes for implicitly read source files. */
         CLASS,
         /** Like CLASS, but generate warnings if annotation processing occurs */
         UNSET;
         static ImplicitSourcePolicy decode(String option) {
             if (option == null)
                 return UNSET;
             else if (option.equals("none"))
                 return NONE;
             else if (option.equals("class"))
                 return CLASS;
             else
                 return UNSET;
         }
     }
     /** The log to be used for error reporting.
      */
     public Log log;
     /** Factory for creating diagnostic objects
      */
     JCDiagnostic.Factory diagFactory;
     /** The tree factory module.
      */
     protected TreeMaker make;
     /** The class reader.
      */
     protected ClassReader reader;
     /** The class writer.
      */
     protected ClassWriter writer;
     /** The module for the symbol table entry phases.
      */
     protected Enter enter;
     /** The symbol table.
      */
     protected Symtab syms;
     /** The language version.
      */
     protected Source source;
     /** The module for code generation.
      */
     protected Gen gen;
     /** The name table.
      */
     protected Names names;
     /** The attributor.
      */
     protected Attr attr;
     /** The attributor.
      */
     protected Check chk;
     /** The flow analyzer.
      */
     protected Flow flow;
     /** The type eraser.
      */
     protected TransTypes transTypes;
     /** The syntactic sugar desweetener.
      */
     protected Lower lower;
     /** The annotation annotator.
      */
     protected Annotate annotate;
     /** Force a completion failure on this name
      */
     protected final Name completionFailureName;
     /** Type utilities.
      */
     protected Types types;
     /** Access to file objects.
      */
     protected JavaFileManager fileManager;
     /** Factory for parsers.
      */
     protected ParserFactory parserFactory;
     /** Optional listener for progress events
      */
     protected TaskListener taskListener;
     /**
      * Annotation processing may require and provide a new instance
      * of the compiler to be used for the analyze and generate phases.
      */
     protected JavaCompiler delegateCompiler;
     /**
      * Flag set if any annotation processing occurred.
      **/
     protected boolean annotationProcessingOccurred;
     /**
      * Flag set if any implicit source files read.
      **/
     protected boolean implicitSourceFilesRead;
     protected Context context;
     /** Construct a new compiler using a shared context.
      */
     public JavaCompiler(final Context context) {
         this.context = context;
         context.put(compilerKey, this);
         // if fileManager not already set, register the JavacFileManager to be used
         if (context.get(JavaFileManager.class) == null)
             JavacFileManager.preRegister(context);
         names = Names.instance(context);
         log = Log.instance(context);
         diagFactory = JCDiagnostic.Factory.instance(context);
         reader = ClassReader.instance(context);
         make = TreeMaker.instance(context);
         writer = ClassWriter.instance(context);
         enter = Enter.instance(context);
         todo = Todo.instance(context);
         fileManager = context.get(JavaFileManager.class);
         parserFactory = ParserFactory.instance(context);
         try {
             // catch completion problems with predefineds
             syms = Symtab.instance(context);
         } catch (CompletionFailure ex) {
             // inlined Check.completionError as it is not initialized yet
             log.error("cant.access", ex.sym, ex.getDetailValue());
             if (ex instanceof ClassReader.BadClassFile)
                 throw new Abort();
         }
         source = Source.instance(context);
         attr = Attr.instance(context);
         chk = Check.instance(context);
         gen = Gen.instance(context);
         flow = Flow.instance(context);
         transTypes = TransTypes.instance(context);
         lower = Lower.instance(context);
         annotate = Annotate.instance(context);
         types = Types.instance(context);
         taskListener = context.get(TaskListener.class);
         reader.sourceCompleter = this;
         Options options = Options.instance(context);
         verbose       = options.get("-verbose")       != null;
         sourceOutput  = options.get("-printsource")   != null; // used to be -s
         stubOutput    = options.get("-stubs")         != null;
         relax         = options.get("-relax")         != null;
         printFlat     = options.get("-printflat")     != null;
         attrParseOnly = options.get("-attrparseonly") != null;
         encoding      = options.get("-encoding");
         lineDebugInfo = options.get("-g:")            == null ||
                         options.get("-g:lines")       != null;
         genEndPos     = options.get("-Xjcov")         != null ||
                         context.get(DiagnosticListener.class) != null;
         devVerbose    = options.get("dev") != null;
         processPcks   = options.get("process.packages") != null;
         werror        = options.get("-Werror")        != null;
         verboseCompilePolicy = options.get("verboseCompilePolicy") != null;
         if (attrParseOnly)
             compilePolicy = CompilePolicy.ATTR_ONLY;
         else
             compilePolicy = CompilePolicy.decode(options.get("compilePolicy"));
         implicitSourcePolicy = ImplicitSourcePolicy.decode(options.get("-implicit"));
         completionFailureName =
             (options.get("failcomplete") != null)
             ? names.fromString(options.get("failcomplete"))
             : null;
         shouldStopPolicy =
             (options.get("shouldStopPolicy") != null)
             ? CompileState.valueOf(options.get("shouldStopPolicy"))
             : null;
     }
     /* Switches:
      */
     /** Verbose output.
      */
     public boolean verbose;
     /** Emit plain Java source files rather than class files.
      */
     public boolean sourceOutput;
     /** Emit stub source files rather than class files.
      */
     public boolean stubOutput;
     /** Generate attributed parse tree only.
      */
     public boolean attrParseOnly;
     /** Switch: relax some constraints for producing the jsr14 prototype.
      */
     boolean relax;
     /** Debug switch: Emit Java sources after inner class flattening.
      */
     public boolean printFlat;
     /** The encoding to be used for source input.
      */
     public String encoding;
     /** Generate code with the LineNumberTable attribute for debugging
      */
     public boolean lineDebugInfo;
     /** Switch: should we store the ending positions?
      */
     public boolean genEndPos;
     /** Switch: should we debug ignored exceptions
      */
     protected boolean devVerbose;
     /** Switch: should we (annotation) process packages as well
      */
     protected boolean processPcks;
     /** Switch: treat warnings as errors
      */
     protected boolean werror;
     /** Switch: is annotation processing requested explitly via
      * CompilationTask.setProcessors?
      */
     protected boolean explicitAnnotationProcessingRequested = false;
     /**
      * The policy for the order in which to perform the compilation
      */
     protected CompilePolicy compilePolicy;
     /**
      * The policy for what to do with implicitly read source files
      */
     protected ImplicitSourcePolicy implicitSourcePolicy;
     /**
      * Report activity related to compilePolicy
      */
     public boolean verboseCompilePolicy;
     /**
      * Policy of how far to continue processing. null means until first
      * error.
      */
     public CompileState shouldStopPolicy;
     /** A queue of all as yet unattributed classes.
      */
     public Todo todo;
     /** Ordered list of compiler phases for each compilation unit. */
     protected enum CompileState {
         PARSE(1),
         ENTER(2),
         PROCESS(3),
         ATTR(4),
         FLOW(5),
         TRANSTYPES(6),
         LOWER(7),
         GENERATE(8);
         CompileState(int value) {
             this.value = value;
         }
         boolean isDone(CompileState other) {
             return value >= other.value;
         }
         private int value;
     };
     /** Partial map to record which compiler phases have been executed
      * for each compilation unit. Used for ATTR and FLOW phases.
      */
     protected class CompileStates extends HashMap<Env<AttrContext>,CompileState> {
         private static final long serialVersionUID = 1812267524140424433L;
         boolean isDone(Env<AttrContext> env, CompileState cs) {
             CompileState ecs = get(env);
             return ecs != null && ecs.isDone(cs);
         }
     }
     private CompileStates compileStates = new CompileStates();
     /** The set of currently compiled inputfiles, needed to ensure
      *  we don't accidentally overwrite an input file when -s is set.
      *  initialized by `compile'.
      */
     protected Set<JavaFileObject> inputFiles = new HashSet<JavaFileObject>();
     protected boolean shouldStop(CompileState cs) {
         if (shouldStopPolicy == null)
             return (errorCount() > 0);
         else
             return cs.ordinal() > shouldStopPolicy.ordinal();
     }
     /** The number of errors reported so far.
      */
     public int errorCount() {
         if (delegateCompiler != null && delegateCompiler != this)
             return delegateCompiler.errorCount();
         else {
             if (werror && log.nerrors == 0 && log.nwarnings > 0) {
                 log.error("warnings.and.werror");
             }
         }
             return log.nerrors;
     }
     protected final <T> Queue<T> stopIfError(CompileState cs, Queue<T> queue) {
         return shouldStop(cs) ? ListBuffer.<T>lb() : queue;
     }
     protected final <T> List<T> stopIfError(CompileState cs, List<T> list) {
         return shouldStop(cs) ? List.<T>nil() : list;
     }
     /** The number of warnings reported so far.
      */
     public int warningCount() {
         if (delegateCompiler != null && delegateCompiler != this)
             return delegateCompiler.warningCount();
         else
             return log.nwarnings;
     }
     /** Whether or not any parse errors have occurred.
      */
     public boolean parseErrors() {
         return parseErrors;
     }
     /** Try to open input stream with given name.
      *  Report an error if this fails.
      *  @param filename   The file name of the input stream to be opened.
      */
     public CharSequence readSource(JavaFileObject filename) {
         try {
             inputFiles.add(filename);
             return filename.getCharContent(false);
         } catch (IOException e) {
             log.error("error.reading.file", filename, e.getLocalizedMessage());
             return null;
         }
     }
     /** Parse contents of input stream.
      *  @param filename     The name of the file from which input stream comes.
      *  @param input        The input stream to be parsed.
      */
     protected JCCompilationUnit parse(JavaFileObject filename, CharSequence content) {
         long msec = now();
         JCCompilationUnit tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(),
                                       null, List.<JCTree>nil());
         if (content != null) {
             if (verbose) {
                 printVerbose("parsing.started", filename);
             }
             if (taskListener != null) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, filename);
                 taskListener.started(e);
             }
             int initialErrorCount = log.nerrors;
             Parser parser = parserFactory.newParser(content, keepComments(), genEndPos, lineDebugInfo);
             tree = parser.parseCompilationUnit();
             parseErrors |= (log.nerrors > initialErrorCount);
             if (verbose) {
                 printVerbose("parsing.done", Long.toString(elapsed(msec)));
             }
         }
         tree.sourcefile = filename;
         if (content != null && taskListener != null) {
             TaskEvent e = new TaskEvent(TaskEvent.Kind.PARSE, tree);
             taskListener.finished(e);
         }
         return tree;
     }
     // where
         public boolean keepComments = false;
         protected boolean keepComments() {
             return keepComments || sourceOutput || stubOutput;
         }
     /** Parse contents of file.
      *  @param filename     The name of the file to be parsed.
      */
     @Deprecated
     public JCTree.JCCompilationUnit parse(String filename) throws IOException {
         JavacFileManager fm = (JavacFileManager)fileManager;
         return parse(fm.getJavaFileObjectsFromStrings(List.of(filename)).iterator().next());
     }
     /** Parse contents of file.
      *  @param filename     The name of the file to be parsed.
      */
     public JCTree.JCCompilationUnit parse(JavaFileObject filename) {
         JavaFileObject prev = log.useSource(filename);
         try {
             JCTree.JCCompilationUnit t = parse(filename, readSource(filename));
             if (t.endPositions != null)
                 log.setEndPosTable(filename, t.endPositions);
             return t;
         } finally {
             log.useSource(prev);
         }
     }
     /** Resolve an identifier.
      * @param name      The identifier to resolve
      */
     public Symbol resolveIdent(String name) {
         if (name.equals(""))
             return syms.errSymbol;
         JavaFileObject prev = log.useSource(null);
         try {
             JCExpression tree = null;
             for (String s : name.split("\\.", -1)) {
                 if (!SourceVersion.isIdentifier(s)) // TODO: check for keywords
                     return syms.errSymbol;
                 tree = (tree == null) ? make.Ident(names.fromString(s))
                                       : make.Select(tree, names.fromString(s));
             }
             JCCompilationUnit toplevel =
                 make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
             toplevel.packge = syms.unnamedPackage;
             return attr.attribIdent(tree, toplevel);
         } finally {
             log.useSource(prev);
         }
     }
     /** Emit plain Java source for a class.
      *  @param env    The attribution environment of the outermost class
      *                containing this class.
      *  @param cdef   The class definition to be printed.
      */
     JavaFileObject printSource(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
         JavaFileObject outFile
             = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
                                                cdef.sym.flatname.toString(),
                                                JavaFileObject.Kind.SOURCE,
                                                null);
         if (inputFiles.contains(outFile)) {
             log.error(cdef.pos(), "source.cant.overwrite.input.file", outFile);
             return null;
         } else {
             BufferedWriter out = new BufferedWriter(outFile.openWriter());
             try {
                 new Pretty(out, true).printUnit(env.toplevel, cdef);
                 if (verbose)
                     printVerbose("wrote.file", outFile);
             } finally {
                 out.close();
             }
             return outFile;
         }
     }
     /** Generate code and emit a class file for a given class
      *  @param env    The attribution environment of the outermost class
      *                containing this class.
      *  @param cdef   The class definition from which code is generated.
      */
     JavaFileObject genCode(Env<AttrContext> env, JCClassDecl cdef) throws IOException {
         try {
             if (gen.genClass(env, cdef) && (errorCount() == 0))
                 return writer.writeClass(cdef.sym);
         } catch (ClassWriter.PoolOverflow ex) {
             log.error(cdef.pos(), "limit.pool");
         } catch (ClassWriter.StringOverflow ex) {
             log.error(cdef.pos(), "limit.string.overflow",
                       ex.value.substring(0, 20));
         } catch (CompletionFailure ex) {
             chk.completionError(cdef.pos(), ex);
         }
         return null;
     }
     /** Complete compiling a source file that has been accessed
      *  by the class file reader.
      *  @param c          The class the source file of which needs to be compiled.
      *  @param filename   The name of the source file.
      *  @param f          An input stream that reads the source file.
      */
     public void complete(ClassSymbol c) throws CompletionFailure {
 //      System.err.println("completing " + c);//DEBUG
         if (completionFailureName == c.fullname) {
             throw new CompletionFailure(c, "user-selected completion failure by class name");
         }
         JCCompilationUnit tree;
         JavaFileObject filename = c.classfile;
         JavaFileObject prev = log.useSource(filename);
         try {
             tree = parse(filename, filename.getCharContent(false));
         } catch (IOException e) {
             log.error("error.reading.file", filename, e);
             tree = make.TopLevel(List.<JCTree.JCAnnotation>nil(), null, List.<JCTree>nil());
         } finally {
             log.useSource(prev);
         }
         if (taskListener != null) {
             TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
             taskListener.started(e);
         }
         enter.complete(List.of(tree), c);
         if (taskListener != null) {
             TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, tree);
             taskListener.finished(e);
         }
         if (enter.getEnv(c) == null) {
             boolean isPkgInfo =
                 tree.sourcefile.isNameCompatible("package-info",
                                                  JavaFileObject.Kind.SOURCE);
             if (isPkgInfo) {
                 if (enter.getEnv(tree.packge) == null) {
                     JCDiagnostic diag =
                         diagFactory.fragment("file.does.not.contain.package",
                                                  c.location());
                     throw reader.new BadClassFile(c, filename, diag);
                 }
             } else {
                 JCDiagnostic diag =
                         diagFactory.fragment("file.doesnt.contain.class",
                                             c.getQualifiedName());
                 throw reader.new BadClassFile(c, filename, diag);
             }
         }
         implicitSourceFilesRead = true;
     }
     /** Track when the JavaCompiler has been used to compile something. */
     private boolean hasBeenUsed = false;
     private long start_msec = 0;
     public long elapsed_msec = 0;
     /** Track whether any errors occurred while parsing source text. */
     private boolean parseErrors = false;
     public void compile(List<JavaFileObject> sourceFileObject)
         throws Throwable {
         compile(sourceFileObject, List.<String>nil(), null);
     }
     /**
      * Main method: compile a list of files, return all compiled classes
      *
      * @param sourceFileObjects file objects to be compiled
      * @param classnames class names to process for annotations
      * @param processors user provided annotation processors to bypass
      * discovery, {@code null} means that no processors were provided
      */
     public void compile(List<JavaFileObject> sourceFileObjects,
                         List<String> classnames,
                         Iterable<? extends Processor> processors)
         throws IOException // TODO: temp, from JavacProcessingEnvironment
     {
         if (processors != null && processors.iterator().hasNext())
             explicitAnnotationProcessingRequested = true;
         // as a JavaCompiler can only be used once, throw an exception if
         // it has been used before.
         if (hasBeenUsed)
             throw new AssertionError("attempt to reuse JavaCompiler");
         hasBeenUsed = true;
         start_msec = now();
         try {
             initProcessAnnotations(processors);
             // These method calls must be chained to avoid memory leaks
             delegateCompiler =
                 processAnnotations(
                     enterTrees(stopIfError(CompileState.PARSE, parseFiles(sourceFileObjects))),
                     classnames);
             delegateCompiler.compile2();
             delegateCompiler.close();
             elapsed_msec = delegateCompiler.elapsed_msec;
         } catch (Abort ex) {
             if (devVerbose)
                 ex.printStackTrace();
         }
     }
     /**
      * The phases following annotation processing: attribution,
      * desugar, and finally code generation.
      */
     private void compile2() {
         try {
             switch (compilePolicy) {
             case ATTR_ONLY:
                 attribute(todo);
                 break;
             case CHECK_ONLY:
                 flow(attribute(todo));
                 break;
             case SIMPLE:
                 generate(desugar(flow(attribute(todo))));
                 break;
             case BY_FILE: {
                     Queue<Queue<Env<AttrContext>>> q = todo.groupByFile();
                     while (!q.isEmpty() && !shouldStop(CompileState.ATTR)) {
                         generate(desugar(flow(attribute(q.remove()))));
                     }
                 }
                 break;
             case BY_TODO:
                 while (!todo.isEmpty())
                     generate(desugar(flow(attribute(todo.remove()))));
                 break;
             default:
                 assert false: "unknown compile policy";
             }
         } catch (Abort ex) {
             if (devVerbose)
                 ex.printStackTrace();
         }
         if (verbose) {
             elapsed_msec = elapsed(start_msec);
             printVerbose("total", Long.toString(elapsed_msec));
         }
         reportDeferredDiagnostics();
         if (!log.hasDiagnosticListener()) {
             printCount("error", errorCount());
             printCount("warn", warningCount());
         }
     }
     private List<JCClassDecl> rootClasses;
     /**
      * Parses a list of files.
      */
    public List<JCCompilationUnit> parseFiles(List<JavaFileObject> fileObjects) throws IOException {
        if (shouldStop(CompileState.PARSE))
            return List.nil();
         //parse all files
         ListBuffer<JCCompilationUnit> trees = lb();
         for (JavaFileObject fileObject : fileObjects)
             trees.append(parse(fileObject));
         return trees.toList();
     }
     /**
      * Enter the symbols found in a list of parse trees.
      * As a side-effect, this puts elements on the "todo" list.
      * Also stores a list of all top level classes in rootClasses.
      */
     public List<JCCompilationUnit> enterTrees(List<JCCompilationUnit> roots) {
         //enter symbols for all files
         if (taskListener != null) {
             for (JCCompilationUnit unit: roots) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
                 taskListener.started(e);
             }
         }
         enter.main(roots);
         if (taskListener != null) {
             for (JCCompilationUnit unit: roots) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.ENTER, unit);
                 taskListener.finished(e);
             }
         }
         //If generating source, remember the classes declared in
         //the original compilation units listed on the command line.
         if (sourceOutput || stubOutput) {
             ListBuffer<JCClassDecl> cdefs = lb();
             for (JCCompilationUnit unit : roots) {
                 for (List<JCTree> defs = unit.defs;
                      defs.nonEmpty();
                      defs = defs.tail) {
                     if (defs.head instanceof JCClassDecl)
                         cdefs.append((JCClassDecl)defs.head);
                 }
             }
             rootClasses = cdefs.toList();
         }
         return roots;
     }
     /**
      * Set to true to enable skeleton annotation processing code.
      * Currently, we assume this variable will be replaced more
      * advanced logic to figure out if annotation processing is
      * needed.
      */
     boolean processAnnotations = false;
     /**
      * Object to handle annotation processing.
      */
     JavacProcessingEnvironment procEnvImpl = null;
     /**
      * Check if we should process annotations.
      * If so, and if no scanner is yet registered, then set up the DocCommentScanner
      * to catch doc comments, and set keepComments so the parser records them in
      * the compilation unit.
      *
      * @param processors user provided annotation processors to bypass
      * discovery, {@code null} means that no processors were provided
      */
     public void initProcessAnnotations(Iterable<? extends Processor> processors) {
         // Process annotations if processing is not disabled and there
         // is at least one Processor available.
         Options options = Options.instance(context);
         if (options.get("-proc:none") != null) {
             processAnnotations = false;
         } else if (procEnvImpl == null) {
             procEnvImpl = new JavacProcessingEnvironment(context, processors);
             processAnnotations = procEnvImpl.atLeastOneProcessor();
             if (processAnnotations) {
                 if (context.get(Scanner.Factory.scannerFactoryKey) == null)
                     DocCommentScanner.Factory.preRegister(context);
                 options.put("save-parameter-names", "save-parameter-names");
                 reader.saveParameterNames = true;
                 keepComments = true;
                 if (taskListener != null)
                     taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
             } else { // free resources
                 procEnvImpl.close();
             }
         }
     }
     // TODO: called by JavacTaskImpl
     public JavaCompiler processAnnotations(List<JCCompilationUnit> roots) throws IOException {
         return processAnnotations(roots, List.<String>nil());
     }
     /**
      * Process any anotations found in the specifed compilation units.
      * @param roots a list of compilation units
      * @return an instance of the compiler in which to complete the compilation
      */
     public JavaCompiler processAnnotations(List<JCCompilationUnit> roots,
                                            List<String> classnames)
         throws IOException  { // TODO: see TEMP note in JavacProcessingEnvironment
         if (shouldStop(CompileState.PROCESS)) {
             // Errors were encountered.  If todo is empty, then the
             // encountered errors were parse errors.  Otherwise, the
             // errors were found during the enter phase which should
             // be ignored when processing annotations.
             if (todo.isEmpty())
                 return this;
         }
         // ASSERT: processAnnotations and procEnvImpl should have been set up by
         // by initProcessAnnotations
         // NOTE: The !classnames.isEmpty() checks should be refactored to Main.
         if (!processAnnotations) {
             // If there are no annotation processors present, and
             // annotation processing is to occur with compilation,
             // emit a warning.
             Options options = Options.instance(context);
             if (options.get("-proc:only") != null) {
                 log.warning("proc.proc-only.requested.no.procs");
                 todo.clear();
             }
             // If not processing annotations, classnames must be empty
             if (!classnames.isEmpty()) {
                 log.error("proc.no.explicit.annotation.processing.requested",
                           classnames);
             }
             return this; // continue regular compilation
         }
         try {
             List<ClassSymbol> classSymbols = List.nil();
             List<PackageSymbol> pckSymbols = List.nil();
             if (!classnames.isEmpty()) {
                  // Check for explicit request for annotation
                  // processing
                 if (!explicitAnnotationProcessingRequested()) {
                     log.error("proc.no.explicit.annotation.processing.requested",
                               classnames);
                     return this; // TODO: Will this halt compilation?
                 } else {
                     boolean errors = false;
                     for (String nameStr : classnames) {
                         Symbol sym = resolveIdent(nameStr);
                         if (sym == null || (sym.kind == Kinds.PCK && !processPcks)) {
                             log.error("proc.cant.find.class", nameStr);
                             errors = true;
                             continue;
                         }
                         try {
                             if (sym.kind == Kinds.PCK)
                                 sym.complete();
                             if (sym.exists()) {
                                 Name name = names.fromString(nameStr);
                                 if (sym.kind == Kinds.PCK)
                                     pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
                                 else
                                     classSymbols = classSymbols.prepend((ClassSymbol)sym);
                                 continue;
                             }
                             assert sym.kind == Kinds.PCK;
                             log.warning("proc.package.does.not.exist", nameStr);
                             pckSymbols = pckSymbols.prepend((PackageSymbol)sym);
                         } catch (CompletionFailure e) {
                             log.error("proc.cant.find.class", nameStr);
                             errors = true;
                             continue;
                         }
                     }
                     if (errors)
                         return this;
                 }
             }
             JavaCompiler c = procEnvImpl.doProcessing(context, roots, classSymbols, pckSymbols);
             if (c != this)
                 annotationProcessingOccurred = c.annotationProcessingOccurred = true;
             return c;
         } catch (CompletionFailure ex) {
             log.error("cant.access", ex.sym, ex.getDetailValue());
             return this;
         }
     }
     boolean explicitAnnotationProcessingRequested() {
         Options options = Options.instance(context);
         return
             explicitAnnotationProcessingRequested ||
             options.get("-processor") != null ||
             options.get("-processorpath") != null ||
             options.get("-proc:only") != null ||
             options.get("-Xprint") != null;
     }
     /**
      * Attribute a list of parse trees, such as found on the "todo" list.
      * Note that attributing classes may cause additional files to be
      * parsed and entered via the SourceCompleter.
      * Attribution of the entries in the list does not stop if any errors occur.
      * @returns a list of environments for attributd classes.
      */
     public Queue<Env<AttrContext>> attribute(Queue<Env<AttrContext>> envs) {
         ListBuffer<Env<AttrContext>> results = lb();
         while (!envs.isEmpty())
             results.append(attribute(envs.remove()));
         return stopIfError(CompileState.ATTR, results);
     }
     /**
      * Attribute a parse tree.
      * @returns the attributed parse tree
      */
     public Env<AttrContext> attribute(Env<AttrContext> env) {
         if (compileStates.isDone(env, CompileState.ATTR))
             return env;
         if (verboseCompilePolicy)
             log.printLines(log.noticeWriter, "[attribute " + env.enclClass.sym + "]");
         if (verbose)
             printVerbose("checking.attribution", env.enclClass.sym);
         if (taskListener != null) {
             TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
             taskListener.started(e);
         }
         JavaFileObject prev = log.useSource(
                                   env.enclClass.sym.sourcefile != null ?
                                   env.enclClass.sym.sourcefile :
                                   env.toplevel.sourcefile);
         try {
             attr.attribClass(env.tree.pos(), env.enclClass.sym);
             compileStates.put(env, CompileState.ATTR);
         }
         finally {
             log.useSource(prev);
         }
         return env;
     }
     /**
      * Perform dataflow checks on attributed parse trees.
      * These include checks for definite assignment and unreachable statements.
      * If any errors occur, an empty list will be returned.
      * @returns the list of attributed parse trees
      */
     public Queue<Env<AttrContext>> flow(Queue<Env<AttrContext>> envs) {
         ListBuffer<Env<AttrContext>> results = lb();
         for (Env<AttrContext> env: envs) {
             flow(env, results);
         }
         return stopIfError(CompileState.FLOW, results);
     }
     /**
      * Perform dataflow checks on an attributed parse tree.
      */
     public Queue<Env<AttrContext>> flow(Env<AttrContext> env) {
         ListBuffer<Env<AttrContext>> results = lb();
         flow(env, results);
         return stopIfError(CompileState.FLOW, results);
     }
     /**
      * Perform dataflow checks on an attributed parse tree.
      */
     protected void flow(Env<AttrContext> env, Queue<Env<AttrContext>> results) {
         try {
             if (shouldStop(CompileState.FLOW))
                 return;
             if (relax || compileStates.isDone(env, CompileState.FLOW)) {
                 results.add(env);
                 return;
             }
             if (verboseCompilePolicy)
                 printNote("[flow " + env.enclClass.sym + "]");
             JavaFileObject prev = log.useSource(
                                                 env.enclClass.sym.sourcefile != null ?
                                                 env.enclClass.sym.sourcefile :
                                                 env.toplevel.sourcefile);
             try {
                 make.at(Position.FIRSTPOS);
                 TreeMaker localMake = make.forToplevel(env.toplevel);
                 flow.analyzeTree(env.tree, localMake);
                 compileStates.put(env, CompileState.FLOW);
                 if (shouldStop(CompileState.FLOW))
                     return;
                 results.add(env);
             }
             finally {
                 log.useSource(prev);
             }
         }
         finally {
             if (taskListener != null) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.ANALYZE, env.toplevel, env.enclClass.sym);
                 taskListener.finished(e);
             }
         }
     }
     /**
      * Prepare attributed parse trees, in conjunction with their attribution contexts,
      * for source or code generation.
      * If any errors occur, an empty list will be returned.
      * @returns a list containing the classes to be generated
      */
     public Queue<Pair<Env<AttrContext>, JCClassDecl>> desugar(Queue<Env<AttrContext>> envs) {
         ListBuffer<Pair<Env<AttrContext>, JCClassDecl>> results = lb();
         for (Env<AttrContext> env: envs)
             desugar(env, results);
         return stopIfError(CompileState.FLOW, results);
     }
     /**
      * Prepare attributed parse trees, in conjunction with their attribution contexts,
      * for source or code generation. If the file was not listed on the command line,
      * the current implicitSourcePolicy is taken into account.
      * The preparation stops as soon as an error is found.
      */
     protected void desugar(final Env<AttrContext> env, Queue<Pair<Env<AttrContext>, JCClassDecl>> results) {
         if (shouldStop(CompileState.TRANSTYPES))
             return;
         if (implicitSourcePolicy == ImplicitSourcePolicy.NONE
                 && !inputFiles.contains(env.toplevel.sourcefile)) {
             return;
         }
         /**
          * As erasure (TransTypes) destroys information needed in flow analysis,
          * including information in supertypes, we need to ensure that supertypes
          * are processed through attribute and flow before subtypes are translated.
          */
         class ScanNested extends TreeScanner {
             Set<Env<AttrContext>> dependencies = new LinkedHashSet<Env<AttrContext>>();
             @Override
             public void visitClassDef(JCClassDecl node) {
                 Type st = types.supertype(node.sym.type);
                 if (st.tag == TypeTags.CLASS) {
                     ClassSymbol c = st.tsym.outermostClass();
                     Env<AttrContext> stEnv = enter.getEnv(c);
                     if (stEnv != null && env != stEnv) {
                         if (dependencies.add(stEnv))
                             scan(stEnv.tree);
                     }
                 }
                 super.visitClassDef(node);
             }
         }
         ScanNested scanner = new ScanNested();
         scanner.scan(env.tree);
         for (Env<AttrContext> dep: scanner.dependencies) {
             if (!compileStates.isDone(dep, CompileState.FLOW))
                 flow(attribute(dep));
         }
         //We need to check for error another time as more classes might
         //have been attributed and analyzed at this stage
         if (shouldStop(CompileState.TRANSTYPES))
             return;
         if (verboseCompilePolicy)
             printNote("[desugar " + env.enclClass.sym + "]");
         JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
                                   env.enclClass.sym.sourcefile :
                                   env.toplevel.sourcefile);
         try {
             //save tree prior to rewriting
             JCTree untranslated = env.tree;
             make.at(Position.FIRSTPOS);
             TreeMaker localMake = make.forToplevel(env.toplevel);
             if (env.tree instanceof JCCompilationUnit) {
                 if (!(stubOutput || sourceOutput || printFlat)) {
                     if (shouldStop(CompileState.LOWER))
                         return;
                     List<JCTree> pdef = lower.translateTopLevelClass(env, env.tree, localMake);
                     if (pdef.head != null) {
                         assert pdef.tail.isEmpty();
                         results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, (JCClassDecl)pdef.head));
                     }
                 }
                 return;
             }
             if (stubOutput) {
                 //emit stub Java source file, only for compilation
                 //units enumerated explicitly on the command line
                 JCClassDecl cdef = (JCClassDecl)env.tree;
                 if (untranslated instanceof JCClassDecl &&
                     rootClasses.contains((JCClassDecl)untranslated) &&
                     ((cdef.mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                      cdef.sym.packge().getQualifiedName() == names.java_lang)) {
                     results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, removeMethodBodies(cdef)));
                 }
                 return;
             }
             if (shouldStop(CompileState.TRANSTYPES))
                 return;
             env.tree = transTypes.translateTopLevelClass(env.tree, localMake);
             if (shouldStop(CompileState.LOWER))
                 return;
             if (sourceOutput) {
                 //emit standard Java source file, only for compilation
                 //units enumerated explicitly on the command line
                 JCClassDecl cdef = (JCClassDecl)env.tree;
                 if (untranslated instanceof JCClassDecl &&
                     rootClasses.contains((JCClassDecl)untranslated)) {
                     results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
                 }
                 return;
             }
             //translate out inner classes
             List<JCTree> cdefs = lower.translateTopLevelClass(env, env.tree, localMake);
             if (shouldStop(CompileState.LOWER))
                 return;
             //generate code for each class
             for (List<JCTree> l = cdefs; l.nonEmpty(); l = l.tail) {
                 JCClassDecl cdef = (JCClassDecl)l.head;
                 results.add(new Pair<Env<AttrContext>, JCClassDecl>(env, cdef));
             }
         }
         finally {
             log.useSource(prev);
         }
     }
     /** Generates the source or class file for a list of classes.
      * The decision to generate a source file or a class file is
      * based upon the compiler's options.
      * Generation stops if an error occurs while writing files.
      */
     public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue) {
         generate(queue, null);
     }
     public void generate(Queue<Pair<Env<AttrContext>, JCClassDecl>> queue, Queue<JavaFileObject> results) {
         if (shouldStop(CompileState.GENERATE))
             return;
         boolean usePrintSource = (stubOutput || sourceOutput || printFlat);
         for (Pair<Env<AttrContext>, JCClassDecl> x: queue) {
             Env<AttrContext> env = x.fst;
             JCClassDecl cdef = x.snd;
             if (verboseCompilePolicy) {
                 printNote("[generate "
                                + (usePrintSource ? " source" : "code")
                                + " " + cdef.sym + "]");
             }
             if (taskListener != null) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
                 taskListener.started(e);
             }
             JavaFileObject prev = log.useSource(env.enclClass.sym.sourcefile != null ?
                                       env.enclClass.sym.sourcefile :
                                       env.toplevel.sourcefile);
             try {
                 JavaFileObject file;
                 if (usePrintSource)
                     file = printSource(env, cdef);
                 else
                     file = genCode(env, cdef);
                 if (results != null && file != null)
                     results.add(file);
             } catch (IOException ex) {
                 log.error(cdef.pos(), "class.cant.write",
                           cdef.sym, ex.getMessage());
                 return;
             } finally {
                 log.useSource(prev);
             }
             if (taskListener != null) {
                 TaskEvent e = new TaskEvent(TaskEvent.Kind.GENERATE, env.toplevel, cdef.sym);
                 taskListener.finished(e);
             }
         }
     }
         // where
         Map<JCCompilationUnit, Queue<Env<AttrContext>>> groupByFile(Queue<Env<AttrContext>> envs) {
             // use a LinkedHashMap to preserve the order of the original list as much as possible
             Map<JCCompilationUnit, Queue<Env<AttrContext>>> map = new LinkedHashMap<JCCompilationUnit, Queue<Env<AttrContext>>>();
             for (Env<AttrContext> env: envs) {
                 Queue<Env<AttrContext>> sublist = map.get(env.toplevel);
                 if (sublist == null) {
                     sublist = new ListBuffer<Env<AttrContext>>();
                     map.put(env.toplevel, sublist);
                 }
                 sublist.add(env);
             }
             return map;
         }
         JCClassDecl removeMethodBodies(JCClassDecl cdef) {
             final boolean isInterface = (cdef.mods.flags & Flags.INTERFACE) != 0;
             class MethodBodyRemover extends TreeTranslator {
                 @Override
                 public void visitMethodDef(JCMethodDecl tree) {
                     tree.mods.flags &= ~Flags.SYNCHRONIZED;
                     for (JCVariableDecl vd : tree.params)
                         vd.mods.flags &= ~Flags.FINAL;
                     tree.body = null;
                     super.visitMethodDef(tree);
                 }
                 @Override
                 public void visitVarDef(JCVariableDecl tree) {
                     if (tree.init != null && tree.init.type.constValue() == null)
                         tree.init = null;
                     super.visitVarDef(tree);
                 }
                 @Override
                 public void visitClassDef(JCClassDecl tree) {
                     ListBuffer<JCTree> newdefs = lb();
                     for (List<JCTree> it = tree.defs; it.tail != null; it = it.tail) {
                         JCTree t = it.head;
                         switch (t.getTag()) {
                         case JCTree.CLASSDEF:
                             if (isInterface ||
                                 (((JCClassDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                                 (((JCClassDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCClassDecl) t).sym.packge().getQualifiedName() == names.java_lang)
                                 newdefs.append(t);
                             break;
                         case JCTree.METHODDEF:
                             if (isInterface ||
                                 (((JCMethodDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                                 ((JCMethodDecl) t).sym.name == names.init ||
                                 (((JCMethodDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCMethodDecl) t).sym.packge().getQualifiedName() == names.java_lang)
                                 newdefs.append(t);
                             break;
                         case JCTree.VARDEF:
                             if (isInterface || (((JCVariableDecl) t).mods.flags & (Flags.PROTECTED|Flags.PUBLIC)) != 0 ||
                                 (((JCVariableDecl) t).mods.flags & (Flags.PRIVATE)) == 0 && ((JCVariableDecl) t).sym.packge().getQualifiedName() == names.java_lang)
                                 newdefs.append(t);
                             break;
                         default:
                             break;
                         }
                     }
                     tree.defs = newdefs.toList();
                     super.visitClassDef(tree);
                 }
             }
             MethodBodyRemover r = new MethodBodyRemover();
             return r.translate(cdef);
         }
     public void reportDeferredDiagnostics() {
         if (annotationProcessingOccurred
                 && implicitSourceFilesRead
                 && implicitSourcePolicy == ImplicitSourcePolicy.UNSET) {
             if (explicitAnnotationProcessingRequested())
                 log.warning("proc.use.implicit");
             else
                 log.warning("proc.use.proc.or.implicit");
         }
         chk.reportDeferredDiagnostics();
     }
     /** Close the compiler, flushing the logs
      */
     public void close() {
         close(true);
     }
     public void close(boolean disposeNames) {
         rootClasses = null;
         reader = null;
         make = null;
         writer = null;
         enter = null;
         if (todo != null)
             todo.clear();
         todo = null;
         parserFactory = null;
         syms = null;
         source = null;
         attr = null;
         chk = null;
         gen = null;
         flow = null;
         transTypes = null;
         lower = null;
         annotate = null;
         types = null;
         log.flush();
         try {
             fileManager.flush();
         } catch (IOException e) {
             throw new Abort(e);
         } finally {
             if (names != null && disposeNames)
                 names.dispose();
             names = null;
         }
     }
     protected void printNote(String lines) {
         Log.printLines(log.noticeWriter, lines);
     }
     /** Output for "-verbose" option.
      *  @param key The key to look up the correct internationalized string.
      *  @param arg An argument for substitution into the output string.
      */
     protected void printVerbose(String key, Object arg) {
         Log.printLines(log.noticeWriter, Log.getLocalizedString("verbose." + key, arg));
     }
     /** Print numbers of errors and warnings.
      */
     protected void printCount(String kind, int count) {
         if (count != 0) {
             String text;
             if (count == 1)
                 text = Log.getLocalizedString("count." + kind, String.valueOf(count));
             else
                 text = Log.getLocalizedString("count." + kind + ".plural", String.valueOf(count));
             Log.printLines(log.errWriter, text);
             log.errWriter.flush();
         }
     }
     private static long now() {
         return System.currentTimeMillis();
     }
     private static long elapsed(long then) {
         return now() - then;
     }
     public void initRound(JavaCompiler prev) {
         keepComments = prev.keepComments;
         start_msec = prev.start_msec;
         hasBeenUsed = true;
     }
     public static void enableLogging() {
         Logger logger = Logger.getLogger(com.sun.tools.javac.Main.class.getPackage().getName());
         logger.setLevel(Level.ALL);
         for (Handler h : logger.getParent().getHandlers()) {
             h.setLevel(Level.ALL);
        }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/main/JavaCompiler.java@79eb8795a1de (annotated)

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