jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java@c0f0c41cafa0 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java@c0f0c41cafa0 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java

Mon, 19 Nov 2012 11:38:49 -0800

author: jjg
date: Mon, 19 Nov 2012 11:38:49 -0800
changeset 1416: c0f0c41cafa0
parent 1413: bdcef2ef52d2
child 1455: 75ab654b5cd5
permissions: -rw-r--r--

8001098: Provide a simple light-weight "plug-in" mechanism for javac
Reviewed-by: mcimadamore

 /*
  * Copyright (c) 2005, 2012, Oracle and/or its affiliates. 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javac.api;
 import java.io.File;
 import java.io.IOException;
 import java.nio.CharBuffer;
 import java.util.*;
 import java.util.concurrent.atomic.AtomicBoolean;
 import javax.annotation.processing.Processor;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.type.TypeMirror;
 import javax.tools.*;
 import com.sun.source.tree.*;
 import com.sun.source.util.*;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.comp.*;
 import com.sun.tools.javac.file.JavacFileManager;
 import com.sun.tools.javac.main.*;
 import com.sun.tools.javac.main.JavaCompiler;
 import com.sun.tools.javac.model.*;
 import com.sun.tools.javac.parser.Parser;
 import com.sun.tools.javac.parser.ParserFactory;
 import com.sun.tools.javac.tree.*;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.*;
 import com.sun.tools.javac.util.List;
 /**
  * Provides access to functionality specific to the JDK Java Compiler, javac.
  *
  * <p><b>This is NOT part of any supported API.
  * 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></p>
  *
  * @author Peter von der Ah&eacute;
  * @author Jonathan Gibbons
  */
 public class JavacTaskImpl extends BasicJavacTask {
     private ClientCodeWrapper ccw;
     private Main compilerMain;
     private JavaCompiler compiler;
     private Locale locale;
     private String[] args;
     private String[] classNames;
     private List<JavaFileObject> fileObjects;
     private Map<JavaFileObject, JCCompilationUnit> notYetEntered;
     private ListBuffer<Env<AttrContext>> genList;
     private final AtomicBoolean used = new AtomicBoolean();
     private Iterable<? extends Processor> processors;
     private Main.Result result = null;
     JavacTaskImpl(Main compilerMain,
                 String[] args,
                 String[] classNames,
                 Context context,
                 List<JavaFileObject> fileObjects) {
         super(null, false);
         this.ccw = ClientCodeWrapper.instance(context);
         this.compilerMain = compilerMain;
         this.args = args;
         this.classNames = classNames;
         this.context = context;
         this.fileObjects = fileObjects;
         setLocale(Locale.getDefault());
         // null checks
         compilerMain.getClass();
         args.getClass();
         fileObjects.getClass();
     }
     JavacTaskImpl(Main compilerMain,
                 Iterable<String> args,
                 Context context,
                 Iterable<String> classes,
                 Iterable<? extends JavaFileObject> fileObjects) {
         this(compilerMain, toArray(args), toArray(classes), context, toList(fileObjects));
     }
     static private String[] toArray(Iterable<String> iter) {
         ListBuffer<String> result = new ListBuffer<String>();
         if (iter != null)
             for (String s : iter)
                 result.append(s);
         return result.toArray(new String[result.length()]);
     }
     static private List<JavaFileObject> toList(Iterable<? extends JavaFileObject> fileObjects) {
         if (fileObjects == null)
             return List.nil();
         ListBuffer<JavaFileObject> result = new ListBuffer<JavaFileObject>();
         for (JavaFileObject fo : fileObjects)
             result.append(fo);
         return result.toList();
     }
     public Boolean call() {
         if (!used.getAndSet(true)) {
             initContext();
             notYetEntered = new HashMap<JavaFileObject, JCCompilationUnit>();
             compilerMain.setAPIMode(true);
             result = compilerMain.compile(args, classNames, context, fileObjects, processors);
             cleanup();
             return result.isOK();
         } else {
             throw new IllegalStateException("multiple calls to method 'call'");
         }
     }
     public void setProcessors(Iterable<? extends Processor> processors) {
         processors.getClass(); // null check
         // not mt-safe
         if (used.get())
             throw new IllegalStateException();
         this.processors = processors;
     }
     public void setLocale(Locale locale) {
         if (used.get())
             throw new IllegalStateException();
         this.locale = locale;
     }
     private void prepareCompiler() throws IOException {
         if (used.getAndSet(true)) {
             if (compiler == null)
                 throw new IllegalStateException();
         } else {
             initContext();
             compilerMain.setOptions(Options.instance(context));
             compilerMain.filenames = new LinkedHashSet<File>();
             Collection<File> filenames = compilerMain.processArgs(CommandLine.parse(args), classNames);
             if (!filenames.isEmpty())
                 throw new IllegalArgumentException("Malformed arguments " + toString(filenames, " "));
             compiler = JavaCompiler.instance(context);
             compiler.keepComments = true;
             compiler.genEndPos = true;
             // NOTE: this value will be updated after annotation processing
             compiler.initProcessAnnotations(processors);
             notYetEntered = new HashMap<JavaFileObject, JCCompilationUnit>();
             for (JavaFileObject file: fileObjects)
                 notYetEntered.put(file, null);
             genList = new ListBuffer<Env<AttrContext>>();
             // endContext will be called when all classes have been generated
             // TODO: should handle the case after each phase if errors have occurred
             args = null;
             classNames = null;
         }
     }
     <T> String toString(Iterable<T> items, String sep) {
         String currSep = "";
         StringBuilder sb = new StringBuilder();
         for (T item: items) {
             sb.append(currSep);
             sb.append(item.toString());
             currSep = sep;
         }
         return sb.toString();
     }
     private void initContext() {
         context.put(JavacTask.class, this);
         //initialize compiler's default locale
         context.put(Locale.class, locale);
     }
     void cleanup() {
         if (compiler != null)
             compiler.close();
         compiler = null;
         compilerMain = null;
         args = null;
         classNames = null;
         context = null;
         fileObjects = null;
         notYetEntered = null;
     }
     /**
      * Construct a JavaFileObject from the given file.
      *
      * <p><b>TODO: this method is useless here</b></p>
      *
      * @param file a file
      * @return a JavaFileObject from the standard file manager.
      */
     public JavaFileObject asJavaFileObject(File file) {
         JavacFileManager fm = (JavacFileManager)context.get(JavaFileManager.class);
         return fm.getRegularFile(file);
     }
     /**
      * Parse the specified files returning a list of abstract syntax trees.
      *
      * @throws java.io.IOException TODO
      * @return a list of abstract syntax trees
      */
     public Iterable<? extends CompilationUnitTree> parse() throws IOException {
         try {
             prepareCompiler();
             List<JCCompilationUnit> units = compiler.parseFiles(fileObjects);
             for (JCCompilationUnit unit: units) {
                 JavaFileObject file = unit.getSourceFile();
                 if (notYetEntered.containsKey(file))
                     notYetEntered.put(file, unit);
             }
             return units;
         }
         finally {
             parsed = true;
             if (compiler != null && compiler.log != null)
                 compiler.log.flush();
         }
     }
     private boolean parsed = false;
     /**
      * Translate all the abstract syntax trees to elements.
      *
      * @throws IOException TODO
      * @return a list of elements corresponding to the top level
      * classes in the abstract syntax trees
      */
     public Iterable<? extends TypeElement> enter() throws IOException {
         return enter(null);
     }
     /**
      * Translate the given abstract syntax trees to elements.
      *
      * @param trees a list of abstract syntax trees.
      * @throws java.io.IOException TODO
      * @return a list of elements corresponding to the top level
      * classes in the abstract syntax trees
      */
     public Iterable<? extends TypeElement> enter(Iterable<? extends CompilationUnitTree> trees)
         throws IOException
     {
         if (trees == null && notYetEntered != null && notYetEntered.isEmpty())
             return List.nil();
         prepareCompiler();
         ListBuffer<JCCompilationUnit> roots = null;
         if (trees == null) {
             // If there are still files which were specified to be compiled
             // (i.e. in fileObjects) but which have not yet been entered,
             // then we make sure they have been parsed and add them to the
             // list to be entered.
             if (notYetEntered.size() > 0) {
                 if (!parsed)
                     parse(); // TODO would be nice to specify files needed to be parsed
                 for (JavaFileObject file: fileObjects) {
                     JCCompilationUnit unit = notYetEntered.remove(file);
                     if (unit != null) {
                         if (roots == null)
                             roots = new ListBuffer<JCCompilationUnit>();
                         roots.append(unit);
                     }
                 }
                 notYetEntered.clear();
             }
         }
         else {
             for (CompilationUnitTree cu : trees) {
                 if (cu instanceof JCCompilationUnit) {
                     if (roots == null)
                         roots = new ListBuffer<JCCompilationUnit>();
                     roots.append((JCCompilationUnit)cu);
                     notYetEntered.remove(cu.getSourceFile());
                 }
                 else
                     throw new IllegalArgumentException(cu.toString());
             }
         }
         if (roots == null)
             return List.nil();
         try {
             List<JCCompilationUnit> units = compiler.enterTrees(roots.toList());
             if (notYetEntered.isEmpty())
                 compiler = compiler.processAnnotations(units);
             ListBuffer<TypeElement> elements = new ListBuffer<TypeElement>();
             for (JCCompilationUnit unit : units) {
                 for (JCTree node : unit.defs) {
                     if (node.hasTag(JCTree.Tag.CLASSDEF)) {
                         JCClassDecl cdef = (JCClassDecl) node;
                         if (cdef.sym != null) // maybe null if errors in anno processing
                             elements.append(cdef.sym);
                     }
                 }
             }
             return elements.toList();
         }
         finally {
             compiler.log.flush();
         }
     }
     /**
      * Complete all analysis.
      * @throws IOException TODO
      */
     @Override
     public Iterable<? extends Element> analyze() throws IOException {
         return analyze(null);
     }
     /**
      * Complete all analysis on the given classes.
      * This can be used to ensure that all compile time errors are reported.
      * The classes must have previously been returned from {@link #enter}.
      * If null is specified, all outstanding classes will be analyzed.
      *
      * @param classes a list of class elements
      */
     // This implementation requires that we open up privileges on JavaCompiler.
     // An alternative implementation would be to move this code to JavaCompiler and
     // wrap it here
     public Iterable<? extends Element> analyze(Iterable<? extends TypeElement> classes) throws IOException {
         enter(null);  // ensure all classes have been entered
         final ListBuffer<Element> results = new ListBuffer<Element>();
         try {
             if (classes == null) {
                 handleFlowResults(compiler.flow(compiler.attribute(compiler.todo)), results);
             } else {
                 Filter f = new Filter() {
                     public void process(Env<AttrContext> env) {
                         handleFlowResults(compiler.flow(compiler.attribute(env)), results);
                     }
                 };
                 f.run(compiler.todo, classes);
             }
         } finally {
             compiler.log.flush();
         }
         return results;
     }
     // where
         private void handleFlowResults(Queue<Env<AttrContext>> queue, ListBuffer<Element> elems) {
             for (Env<AttrContext> env: queue) {
                 switch (env.tree.getTag()) {
                     case CLASSDEF:
                         JCClassDecl cdef = (JCClassDecl) env.tree;
                         if (cdef.sym != null)
                             elems.append(cdef.sym);
                         break;
                     case TOPLEVEL:
                         JCCompilationUnit unit = (JCCompilationUnit) env.tree;
                         if (unit.packge != null)
                             elems.append(unit.packge);
                         break;
                 }
             }
             genList.addAll(queue);
         }
     /**
      * Generate code.
      * @throws IOException TODO
      */
     @Override
     public Iterable<? extends JavaFileObject> generate() throws IOException {
         return generate(null);
     }
     /**
      * Generate code corresponding to the given classes.
      * The classes must have previously been returned from {@link #enter}.
      * If there are classes outstanding to be analyzed, that will be done before
      * any classes are generated.
      * If null is specified, code will be generated for all outstanding classes.
      *
      * @param classes a list of class elements
      */
     public Iterable<? extends JavaFileObject> generate(Iterable<? extends TypeElement> classes) throws IOException {
         final ListBuffer<JavaFileObject> results = new ListBuffer<JavaFileObject>();
         try {
             analyze(null);  // ensure all classes have been parsed, entered, and analyzed
             if (classes == null) {
                 compiler.generate(compiler.desugar(genList), results);
                 genList.clear();
             }
             else {
                 Filter f = new Filter() {
                         public void process(Env<AttrContext> env) {
                             compiler.generate(compiler.desugar(ListBuffer.of(env)), results);
                         }
                     };
                 f.run(genList, classes);
             }
             if (genList.isEmpty()) {
                 compiler.reportDeferredDiagnostics();
                 cleanup();
             }
         }
         finally {
             if (compiler != null)
                 compiler.log.flush();
         }
         return results;
     }
     public TypeMirror getTypeMirror(Iterable<? extends Tree> path) {
         // TODO: Should complete attribution if necessary
         Tree last = null;
         for (Tree node : path)
             last = node;
         return ((JCTree)last).type;
     }
     public JavacElements getElements() {
         if (context == null)
             throw new IllegalStateException();
         return JavacElements.instance(context);
     }
     public JavacTypes getTypes() {
         if (context == null)
             throw new IllegalStateException();
         return JavacTypes.instance(context);
     }
     public Iterable<? extends Tree> pathFor(CompilationUnitTree unit, Tree node) {
         return TreeInfo.pathFor((JCTree) node, (JCTree.JCCompilationUnit) unit).reverse();
     }
     abstract class Filter {
         void run(Queue<Env<AttrContext>> list, Iterable<? extends TypeElement> classes) {
             Set<TypeElement> set = new HashSet<TypeElement>();
             for (TypeElement item: classes)
                 set.add(item);
             ListBuffer<Env<AttrContext>> defer = ListBuffer.<Env<AttrContext>>lb();
             while (list.peek() != null) {
                 Env<AttrContext> env = list.remove();
                 ClassSymbol csym = env.enclClass.sym;
                 if (csym != null && set.contains(csym.outermostClass()))
                     process(env);
                 else
                     defer = defer.append(env);
             }
             list.addAll(defer);
         }
         abstract void process(Env<AttrContext> env);
     }
     /**
      * For internal use only.  This method will be
      * removed without warning.
      */
     public Type parseType(String expr, TypeElement scope) {
         if (expr == null || expr.equals(""))
             throw new IllegalArgumentException();
         compiler = JavaCompiler.instance(context);
         JavaFileObject prev = compiler.log.useSource(null);
         ParserFactory parserFactory = ParserFactory.instance(context);
         Attr attr = Attr.instance(context);
         try {
             CharBuffer buf = CharBuffer.wrap((expr+"\u0000").toCharArray(), 0, expr.length());
             Parser parser = parserFactory.newParser(buf, false, false, false);
             JCTree tree = parser.parseType();
             return attr.attribType(tree, (Symbol.TypeSymbol)scope);
         } finally {
             compiler.log.useSource(prev);
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java@c0f0c41cafa0 (annotated)

src/share/classes/com/sun/tools/javac/api/JavacTaskImpl.java