jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java@4124840b35fe (annotated)

src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java@4124840b35fe (annotated)

src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java

Mon, 30 Aug 2010 18:03:35 -0700

author: jjg
date: Mon, 30 Aug 2010 18:03:35 -0700
changeset 664: 4124840b35fe
parent 663: eb7c263aab73
child 696: d4df3b6ee729
permissions: -rw-r--r--

6403465: javac should defer diagnostics until it can be determined they are persistent
Reviewed-by: mcimadamore, darcy

 /*
  * Copyright (c) 2005, 2009, 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.processing;
 import java.lang.reflect.*;
 import java.util.*;
 import java.util.regex.*;
 import java.net.URL;
 import java.io.Closeable;
 import java.io.File;
 import java.io.PrintWriter;
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.io.StringWriter;
 import javax.annotation.processing.*;
 import javax.lang.model.SourceVersion;
 import javax.lang.model.element.AnnotationMirror;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.element.PackageElement;
 import javax.lang.model.util.*;
 import javax.tools.JavaFileManager;
 import javax.tools.StandardJavaFileManager;
 import javax.tools.JavaFileObject;
 import javax.tools.DiagnosticListener;
 import com.sun.source.util.AbstractTypeProcessor;
 import com.sun.source.util.TaskEvent;
 import com.sun.source.util.TaskListener;
 import com.sun.tools.javac.api.JavacTaskImpl;
 import com.sun.tools.javac.code.*;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.file.JavacFileManager;
 import com.sun.tools.javac.jvm.*;
 import com.sun.tools.javac.main.JavaCompiler;
 import com.sun.tools.javac.main.JavaCompiler.CompileState;
 import com.sun.tools.javac.model.JavacElements;
 import com.sun.tools.javac.model.JavacTypes;
 import com.sun.tools.javac.parser.*;
 import com.sun.tools.javac.tree.*;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.Abort;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.Convert;
 import com.sun.tools.javac.util.FatalError;
 import com.sun.tools.javac.util.JCDiagnostic;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.Log;
 import com.sun.tools.javac.util.JavacMessages;
 import com.sun.tools.javac.util.Name;
 import com.sun.tools.javac.util.Names;
 import com.sun.tools.javac.util.Options;
 import static javax.tools.StandardLocation.*;
 import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag.*;
 /**
  * Objects of this class hold and manage the state needed to support
  * annotation processing.
  *
  * <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>
  */
 public class JavacProcessingEnvironment implements ProcessingEnvironment, Closeable {
     Options options;
     private final boolean printProcessorInfo;
     private final boolean printRounds;
     private final boolean verbose;
     private final boolean lint;
     private final boolean procOnly;
     private final boolean fatalErrors;
     private final boolean werror;
     private final boolean showResolveErrors;
     private boolean foundTypeProcessors;
     private final JavacFiler filer;
     private final JavacMessager messager;
     private final JavacElements elementUtils;
     private final JavacTypes typeUtils;
     /**
      * Holds relevant state history of which processors have been
      * used.
      */
     private DiscoveredProcessors discoveredProcs;
     /**
      * Map of processor-specific options.
      */
     private final Map<String, String> processorOptions;
     /**
      */
     private final Set<String> unmatchedProcessorOptions;
     /**
      * Annotations implicitly processed and claimed by javac.
      */
     private final Set<String> platformAnnotations;
     /**
      * Set of packages given on command line.
      */
     private Set<PackageSymbol> specifiedPackages = Collections.emptySet();
     /** The log to be used for error reporting.
      */
     Log log;
     /** Diagnostic factory.
      */
     JCDiagnostic.Factory diags;
     /**
      * Source level of the compile.
      */
     Source source;
     private ClassLoader processorClassLoader;
     /**
      * JavacMessages object used for localization
      */
     private JavacMessages messages;
     private Context context;
     public JavacProcessingEnvironment(Context context, Iterable<? extends Processor> processors) {
         this.context = context;
         log = Log.instance(context);
         source = Source.instance(context);
         diags = JCDiagnostic.Factory.instance(context);
         options = Options.instance(context);
         printProcessorInfo = options.get("-XprintProcessorInfo") != null;
         printRounds = options.get("-XprintRounds") != null;
         verbose = options.get("-verbose") != null;
         lint = options.lint("processing");
         procOnly = options.get("-proc:only") != null ||
             options.get("-Xprint") != null;
         fatalErrors = options.get("fatalEnterError") != null;
         showResolveErrors = options.get("showResolveErrors") != null;
         werror = options.get("-Werror") != null;
         platformAnnotations = initPlatformAnnotations();
         foundTypeProcessors = false;
         // Initialize services before any processors are initialzied
         // in case processors use them.
         filer = new JavacFiler(context);
         messager = new JavacMessager(context, this);
         elementUtils = new JavacElements(context);
         typeUtils = new JavacTypes(context);
         processorOptions = initProcessorOptions(context);
         unmatchedProcessorOptions = initUnmatchedProcessorOptions();
         messages = JavacMessages.instance(context);
         initProcessorIterator(context, processors);
     }
     private Set<String> initPlatformAnnotations() {
         Set<String> platformAnnotations = new HashSet<String>();
         platformAnnotations.add("java.lang.Deprecated");
         platformAnnotations.add("java.lang.Override");
         platformAnnotations.add("java.lang.SuppressWarnings");
         platformAnnotations.add("java.lang.annotation.Documented");
         platformAnnotations.add("java.lang.annotation.Inherited");
         platformAnnotations.add("java.lang.annotation.Retention");
         platformAnnotations.add("java.lang.annotation.Target");
         return Collections.unmodifiableSet(platformAnnotations);
     }
     private void initProcessorIterator(Context context, Iterable<? extends Processor> processors) {
         Log   log   = Log.instance(context);
         Iterator<? extends Processor> processorIterator;
         if (options.get("-Xprint") != null) {
             try {
                 Processor processor = PrintingProcessor.class.newInstance();
                 processorIterator = List.of(processor).iterator();
             } catch (Throwable t) {
                 AssertionError assertError =
                     new AssertionError("Problem instantiating PrintingProcessor.");
                 assertError.initCause(t);
                 throw assertError;
             }
         } else if (processors != null) {
             processorIterator = processors.iterator();
         } else {
             String processorNames = options.get("-processor");
             JavaFileManager fileManager = context.get(JavaFileManager.class);
             try {
                 // If processorpath is not explicitly set, use the classpath.
                 processorClassLoader = fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
                     ? fileManager.getClassLoader(ANNOTATION_PROCESSOR_PATH)
                     : fileManager.getClassLoader(CLASS_PATH);
                 /*
                  * If the "-processor" option is used, search the appropriate
                  * path for the named class.  Otherwise, use a service
                  * provider mechanism to create the processor iterator.
                  */
                 if (processorNames != null) {
                     processorIterator = new NameProcessIterator(processorNames, processorClassLoader, log);
                 } else {
                     processorIterator = new ServiceIterator(processorClassLoader, log);
                 }
             } catch (SecurityException e) {
                 /*
                  * A security exception will occur if we can't create a classloader.
                  * Ignore the exception if, with hindsight, we didn't need it anyway
                  * (i.e. no processor was specified either explicitly, or implicitly,
                  * in service configuration file.) Otherwise, we cannot continue.
                  */
                 processorIterator = handleServiceLoaderUnavailability("proc.cant.create.loader", e);
             }
         }
         discoveredProcs = new DiscoveredProcessors(processorIterator);
     }
     /**
      * Returns an empty processor iterator if no processors are on the
      * relevant path, otherwise if processors are present, logs an
      * error.  Called when a service loader is unavailable for some
      * reason, either because a service loader class cannot be found
      * or because a security policy prevents class loaders from being
      * created.
      *
      * @param key The resource key to use to log an error message
      * @param e   If non-null, pass this exception to Abort
      */
     private Iterator<Processor> handleServiceLoaderUnavailability(String key, Exception e) {
         JavaFileManager fileManager = context.get(JavaFileManager.class);
         if (fileManager instanceof JavacFileManager) {
             StandardJavaFileManager standardFileManager = (JavacFileManager) fileManager;
             Iterable<? extends File> workingPath = fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
                 ? standardFileManager.getLocation(ANNOTATION_PROCESSOR_PATH)
                 : standardFileManager.getLocation(CLASS_PATH);
             if (needClassLoader(options.get("-processor"), workingPath) )
                 handleException(key, e);
         } else {
             handleException(key, e);
         }
         java.util.List<Processor> pl = Collections.emptyList();
         return pl.iterator();
     }
     /**
      * Handle a security exception thrown during initializing the
      * Processor iterator.
      */
     private void handleException(String key, Exception e) {
         if (e != null) {
             log.error(key, e.getLocalizedMessage());
             throw new Abort(e);
         } else {
             log.error(key);
             throw new Abort();
         }
     }
     /**
      * Use a service loader appropriate for the platform to provide an
      * iterator over annotations processors.  If
      * java.util.ServiceLoader is present use it, otherwise, use
      * sun.misc.Service, otherwise fail if a loader is needed.
      */
     private class ServiceIterator implements Iterator<Processor> {
         // The to-be-wrapped iterator.
         private Iterator<?> iterator;
         private Log log;
         private Class<?> loaderClass;
         private boolean jusl;
         private Object loader;
         ServiceIterator(ClassLoader classLoader, Log log) {
             String loadMethodName;
             this.log = log;
             try {
                 try {
                     loaderClass = Class.forName("java.util.ServiceLoader");
                     loadMethodName = "load";
                     jusl = true;
                 } catch (ClassNotFoundException cnfe) {
                     try {
                         loaderClass = Class.forName("sun.misc.Service");
                         loadMethodName = "providers";
                         jusl = false;
                     } catch (ClassNotFoundException cnfe2) {
                         // Fail softly if a loader is not actually needed.
                         this.iterator = handleServiceLoaderUnavailability("proc.no.service",
                                                                           null);
                         return;
                     }
                 }
                 // java.util.ServiceLoader.load or sun.misc.Service.providers
                 Method loadMethod = loaderClass.getMethod(loadMethodName,
                                                           Class.class,
                                                           ClassLoader.class);
                 Object result = loadMethod.invoke(null,
                                                   Processor.class,
                                                   classLoader);
                 // For java.util.ServiceLoader, we have to call another
                 // method to get the iterator.
                 if (jusl) {
                     loader = result; // Store ServiceLoader to call reload later
                     Method m = loaderClass.getMethod("iterator");
                     result = m.invoke(result); // serviceLoader.iterator();
                 }
                 // The result should now be an iterator.
                 this.iterator = (Iterator<?>) result;
             } catch (Throwable t) {
                 log.error("proc.service.problem");
                 throw new Abort(t);
             }
         }
         public boolean hasNext() {
             try {
                 return iterator.hasNext();
             } catch (Throwable t) {
                 if ("ServiceConfigurationError".
                     equals(t.getClass().getSimpleName())) {
                     log.error("proc.bad.config.file", t.getLocalizedMessage());
                 }
                 throw new Abort(t);
             }
         }
         public Processor next() {
             try {
                 return (Processor)(iterator.next());
             } catch (Throwable t) {
                 if ("ServiceConfigurationError".
                     equals(t.getClass().getSimpleName())) {
                     log.error("proc.bad.config.file", t.getLocalizedMessage());
                 } else {
                     log.error("proc.processor.constructor.error", t.getLocalizedMessage());
                 }
                 throw new Abort(t);
             }
         }
         public void remove() {
             throw new UnsupportedOperationException();
         }
         public void close() {
             if (jusl) {
                 try {
                     // Call java.util.ServiceLoader.reload
                     Method reloadMethod = loaderClass.getMethod("reload");
                     reloadMethod.invoke(loader);
                 } catch(Exception e) {
                     ; // Ignore problems during a call to reload.
                 }
             }
         }
     }
     private static class NameProcessIterator implements Iterator<Processor> {
         Processor nextProc = null;
         Iterator<String> names;
         ClassLoader processorCL;
         Log log;
         NameProcessIterator(String names, ClassLoader processorCL, Log log) {
             this.names = Arrays.asList(names.split(",")).iterator();
             this.processorCL = processorCL;
             this.log = log;
         }
         public boolean hasNext() {
             if (nextProc != null)
                 return true;
             else {
                 if (!names.hasNext())
                     return false;
                 else {
                     String processorName = names.next();
                     Processor processor;
                     try {
                         try {
                             processor =
                                 (Processor) (processorCL.loadClass(processorName).newInstance());
                         } catch (ClassNotFoundException cnfe) {
                             log.error("proc.processor.not.found", processorName);
                             return false;
                         } catch (ClassCastException cce) {
                             log.error("proc.processor.wrong.type", processorName);
                             return false;
                         } catch (Exception e ) {
                             log.error("proc.processor.cant.instantiate", processorName);
                             return false;
                         }
                     } catch(Throwable t) {
                         throw new AnnotationProcessingError(t);
                     }
                     nextProc = processor;
                     return true;
                 }
             }
         }
         public Processor next() {
             if (hasNext()) {
                 Processor p = nextProc;
                 nextProc = null;
                 return p;
             } else
                 throw new NoSuchElementException();
         }
         public void remove () {
             throw new UnsupportedOperationException();
         }
     }
     public boolean atLeastOneProcessor() {
         return discoveredProcs.iterator().hasNext();
     }
     private Map<String, String> initProcessorOptions(Context context) {
         Options options = Options.instance(context);
         Set<String> keySet = options.keySet();
         Map<String, String> tempOptions = new LinkedHashMap<String, String>();
         for(String key : keySet) {
             if (key.startsWith("-A") && key.length() > 2) {
                 int sepIndex = key.indexOf('=');
                 String candidateKey = null;
                 String candidateValue = null;
                 if (sepIndex == -1)
                     candidateKey = key.substring(2);
                 else if (sepIndex >= 3) {
                     candidateKey = key.substring(2, sepIndex);
                     candidateValue = (sepIndex < key.length()-1)?
                         key.substring(sepIndex+1) : null;
                 }
                 tempOptions.put(candidateKey, candidateValue);
             }
         }
         return Collections.unmodifiableMap(tempOptions);
     }
     private Set<String> initUnmatchedProcessorOptions() {
         Set<String> unmatchedProcessorOptions = new HashSet<String>();
         unmatchedProcessorOptions.addAll(processorOptions.keySet());
         return unmatchedProcessorOptions;
     }
     /**
      * State about how a processor has been used by the tool.  If a
      * processor has been used on a prior round, its process method is
      * called on all subsequent rounds, perhaps with an empty set of
      * annotations to process.  The {@code annotatedSupported} method
      * caches the supported annotation information from the first (and
      * only) getSupportedAnnotationTypes call to the processor.
      */
     static class ProcessorState {
         public Processor processor;
         public boolean   contributed;
         private ArrayList<Pattern> supportedAnnotationPatterns;
         private ArrayList<String>  supportedOptionNames;
         ProcessorState(Processor p, Log log, Source source, ProcessingEnvironment env) {
             processor = p;
             contributed = false;
             try {
                 processor.init(env);
                 checkSourceVersionCompatibility(source, log);
                 supportedAnnotationPatterns = new ArrayList<Pattern>();
                 for (String importString : processor.getSupportedAnnotationTypes()) {
                     supportedAnnotationPatterns.add(importStringToPattern(importString,
                                                                           processor,
                                                                           log));
                 }
                 supportedOptionNames = new ArrayList<String>();
                 for (String optionName : processor.getSupportedOptions() ) {
                     if (checkOptionName(optionName, log))
                         supportedOptionNames.add(optionName);
                 }
             } catch (Throwable t) {
                 throw new AnnotationProcessingError(t);
             }
         }
         /**
          * Checks whether or not a processor's source version is
          * compatible with the compilation source version.  The
          * processor's source version needs to be greater than or
          * equal to the source version of the compile.
          */
         private void checkSourceVersionCompatibility(Source source, Log log) {
             SourceVersion procSourceVersion = processor.getSupportedSourceVersion();
             if (procSourceVersion.compareTo(Source.toSourceVersion(source)) < 0 )  {
                 log.warning("proc.processor.incompatible.source.version",
                             procSourceVersion,
                             processor.getClass().getName(),
                             source.name);
             }
         }
         private boolean checkOptionName(String optionName, Log log) {
             boolean valid = isValidOptionName(optionName);
             if (!valid)
                 log.error("proc.processor.bad.option.name",
                             optionName,
                             processor.getClass().getName());
             return valid;
         }
         public boolean annotationSupported(String annotationName) {
             for(Pattern p: supportedAnnotationPatterns) {
                 if (p.matcher(annotationName).matches())
                     return true;
             }
             return false;
         }
         /**
          * Remove options that are matched by this processor.
          */
         public void removeSupportedOptions(Set<String> unmatchedProcessorOptions) {
             unmatchedProcessorOptions.removeAll(supportedOptionNames);
         }
     }
     // TODO: These two classes can probably be rewritten better...
     /**
      * This class holds information about the processors that have
      * been discoverd so far as well as the means to discover more, if
      * necessary.  A single iterator should be used per round of
      * annotation processing.  The iterator first visits already
      * discovered processors then fails over to the service provider
      * mechanism if additional queries are made.
      */
     class DiscoveredProcessors implements Iterable<ProcessorState> {
         class ProcessorStateIterator implements Iterator<ProcessorState> {
             DiscoveredProcessors psi;
             Iterator<ProcessorState> innerIter;
             boolean onProcInterator;
             ProcessorStateIterator(DiscoveredProcessors psi) {
                 this.psi = psi;
                 this.innerIter = psi.procStateList.iterator();
                 this.onProcInterator = false;
             }
             public ProcessorState next() {
                 if (!onProcInterator) {
                     if (innerIter.hasNext())
                         return innerIter.next();
                     else
                         onProcInterator = true;
                 }
                 if (psi.processorIterator.hasNext()) {
                     ProcessorState ps = new ProcessorState(psi.processorIterator.next(),
                                                            log, source, JavacProcessingEnvironment.this);
                     psi.procStateList.add(ps);
                     return ps;
                 } else
                     throw new NoSuchElementException();
             }
             public boolean hasNext() {
                 if (onProcInterator)
                     return  psi.processorIterator.hasNext();
                 else
                     return innerIter.hasNext() || psi.processorIterator.hasNext();
             }
             public void remove () {
                 throw new UnsupportedOperationException();
             }
             /**
              * Run all remaining processors on the procStateList that
              * have not already run this round with an empty set of
              * annotations.
              */
             public void runContributingProcs(RoundEnvironment re) {
                 if (!onProcInterator) {
                     Set<TypeElement> emptyTypeElements = Collections.emptySet();
                     while(innerIter.hasNext()) {
                         ProcessorState ps = innerIter.next();
                         if (ps.contributed)
                             callProcessor(ps.processor, emptyTypeElements, re);
                     }
                 }
             }
         }
         Iterator<? extends Processor> processorIterator;
         ArrayList<ProcessorState>  procStateList;
         public ProcessorStateIterator iterator() {
             return new ProcessorStateIterator(this);
         }
         DiscoveredProcessors(Iterator<? extends Processor> processorIterator) {
             this.processorIterator = processorIterator;
             this.procStateList = new ArrayList<ProcessorState>();
         }
         /**
          * Free jar files, etc. if using a service loader.
          */
         public void close() {
             if (processorIterator != null &&
                 processorIterator instanceof ServiceIterator) {
                 ((ServiceIterator) processorIterator).close();
             }
         }
     }
     private void discoverAndRunProcs(Context context,
                                      Set<TypeElement> annotationsPresent,
                                      List<ClassSymbol> topLevelClasses,
                                      List<PackageSymbol> packageInfoFiles) {
         Map<String, TypeElement> unmatchedAnnotations =
             new HashMap<String, TypeElement>(annotationsPresent.size());
         for(TypeElement a  : annotationsPresent) {
                 unmatchedAnnotations.put(a.getQualifiedName().toString(),
                                          a);
         }
         // Give "*" processors a chance to match
         if (unmatchedAnnotations.size() == 0)
             unmatchedAnnotations.put("", null);
         DiscoveredProcessors.ProcessorStateIterator psi = discoveredProcs.iterator();
         // TODO: Create proper argument values; need past round
         // information to fill in this constructor.  Note that the 1
         // st round of processing could be the last round if there
         // were parse errors on the initial source files; however, we
         // are not doing processing in that case.
         Set<Element> rootElements = new LinkedHashSet<Element>();
         rootElements.addAll(topLevelClasses);
         rootElements.addAll(packageInfoFiles);
         rootElements = Collections.unmodifiableSet(rootElements);
         RoundEnvironment renv = new JavacRoundEnvironment(false,
                                                           false,
                                                           rootElements,
                                                           JavacProcessingEnvironment.this);
         while(unmatchedAnnotations.size() > 0 && psi.hasNext() ) {
             ProcessorState ps = psi.next();
             Set<String>  matchedNames = new HashSet<String>();
             Set<TypeElement> typeElements = new LinkedHashSet<TypeElement>();
             for (Map.Entry<String, TypeElement> entry: unmatchedAnnotations.entrySet()) {
                 String unmatchedAnnotationName = entry.getKey();
                 if (ps.annotationSupported(unmatchedAnnotationName) ) {
                     matchedNames.add(unmatchedAnnotationName);
                     TypeElement te = entry.getValue();
                     if (te != null)
                         typeElements.add(te);
                 }
             }
             if (matchedNames.size() > 0 || ps.contributed) {
                 foundTypeProcessors = foundTypeProcessors || (ps.processor instanceof AbstractTypeProcessor);
                 boolean processingResult = callProcessor(ps.processor, typeElements, renv);
                 ps.contributed = true;
                 ps.removeSupportedOptions(unmatchedProcessorOptions);
                 if (printProcessorInfo || verbose) {
                     log.printNoteLines("x.print.processor.info",
                             ps.processor.getClass().getName(),
                             matchedNames.toString(),
                             processingResult);
                 }
                 if (processingResult) {
                     unmatchedAnnotations.keySet().removeAll(matchedNames);
                 }
             }
         }
         unmatchedAnnotations.remove("");
         if (lint && unmatchedAnnotations.size() > 0) {
             // Remove annotations processed by javac
             unmatchedAnnotations.keySet().removeAll(platformAnnotations);
             if (unmatchedAnnotations.size() > 0) {
                 log = Log.instance(context);
                 log.warning("proc.annotations.without.processors",
                             unmatchedAnnotations.keySet());
             }
         }
         // Run contributing processors that haven't run yet
         psi.runContributingProcs(renv);
         // Debugging
         if (options.get("displayFilerState") != null)
             filer.displayState();
     }
     /**
      * Computes the set of annotations on the symbol in question.
      * Leave class public for external testing purposes.
      */
     public static class ComputeAnnotationSet extends
         ElementScanner7<Set<TypeElement>, Set<TypeElement>> {
         final Elements elements;
         public ComputeAnnotationSet(Elements elements) {
             super();
             this.elements = elements;
         }
         @Override
         public Set<TypeElement> visitPackage(PackageElement e, Set<TypeElement> p) {
             // Don't scan enclosed elements of a package
             return p;
         }
         @Override
         public Set<TypeElement> scan(Element e, Set<TypeElement> p) {
             for (AnnotationMirror annotationMirror :
                      elements.getAllAnnotationMirrors(e) ) {
                 Element e2 = annotationMirror.getAnnotationType().asElement();
                 p.add((TypeElement) e2);
             }
             return super.scan(e, p);
         }
     }
     private boolean callProcessor(Processor proc,
                                          Set<? extends TypeElement> tes,
                                          RoundEnvironment renv) {
         try {
             return proc.process(tes, renv);
         } catch (CompletionFailure ex) {
             StringWriter out = new StringWriter();
             ex.printStackTrace(new PrintWriter(out));
             log.error("proc.cant.access", ex.sym, ex.getDetailValue(), out.toString());
             return false;
         } catch (Throwable t) {
             throw new AnnotationProcessingError(t);
         }
     }
     /**
      * Helper object for a single round of annotation processing.
      */
     class Round {
         /** The round number. */
         final int number;
         /** The context for the round. */
         final Context context;
         /** The compiler for the round. */
         final JavaCompiler compiler;
         /** The log for the round. */
         final Log log;
         /** The number of warnings in the previous round. */
         final int priorWarnings;
         /** The ASTs to be compiled. */
         List<JCCompilationUnit> roots;
         /** The classes to be compiler that have were generated. */
         Map<String, JavaFileObject> genClassFiles;
         /** The set of annotations to be processed this round. */
         Set<TypeElement> annotationsPresent;
         /** The set of top level classes to be processed this round. */
         List<ClassSymbol> topLevelClasses;
         /** The set of package-info files to be processed this round. */
         List<PackageSymbol> packageInfoFiles;
         /** Create a round (common code). */
         private Round(Context context, int number, int priorWarnings) {
             this.context = context;
             this.number = number;
             this.priorWarnings = priorWarnings;
             compiler = JavaCompiler.instance(context);
             log = Log.instance(context);
             log.deferDiagnostics = true;
             // the following is for the benefit of JavacProcessingEnvironment.getContext()
             JavacProcessingEnvironment.this.context = context;
             // the following will be populated as needed
             topLevelClasses  = List.nil();
             packageInfoFiles = List.nil();
         }
         /** Create the first round. */
         Round(Context context, List<JCCompilationUnit> roots, List<ClassSymbol> classSymbols) {
             this(context, 1, 0);
             this.roots = roots;
             genClassFiles = new HashMap<String,JavaFileObject>();
             compiler.todo.clear(); // free the compiler's resources
             // The reverse() in the following line is to maintain behavioural
             // compatibility with the previous revision of the code. Strictly speaking,
             // it should not be necessary, but a javah golden file test fails without it.
             topLevelClasses =
                 getTopLevelClasses(roots).prependList(classSymbols.reverse());
             packageInfoFiles = getPackageInfoFiles(roots);
             findAnnotationsPresent();
         }
         /** Create a new round. */
         private Round(Round prev,
                 Set<JavaFileObject> newSourceFiles, Map<String,JavaFileObject> newClassFiles) {
             this(prev.nextContext(), prev.number+1, prev.compiler.log.nwarnings);
             this.genClassFiles = prev.genClassFiles;
             updateProcessingState();
             List<JCCompilationUnit> parsedFiles = compiler.parseFiles(newSourceFiles);
             roots = cleanTrees(prev.roots).appendList(parsedFiles);
             // Check for errors after parsing
             if (unrecoverableError())
                 return;
             enterClassFiles(genClassFiles);
             List<ClassSymbol> newClasses = enterClassFiles(newClassFiles);
             genClassFiles.putAll(newClassFiles);
             enterTrees(roots);
             if (unrecoverableError())
                 return;
             topLevelClasses = join(
                     getTopLevelClasses(parsedFiles),
                     getTopLevelClassesFromClasses(newClasses));
             packageInfoFiles = join(
                     getPackageInfoFiles(parsedFiles),
                     getPackageInfoFilesFromClasses(newClasses));
             findAnnotationsPresent();
         }
         /** Create the next round to be used. */
         Round next(Set<JavaFileObject> newSourceFiles, Map<String, JavaFileObject> newClassFiles) {
             try {
                 return new Round(this, newSourceFiles, newClassFiles);
             } finally {
                 compiler.close(false);
             }
         }
         /** Create the compiler to be used for the final compilation. */
         JavaCompiler finalCompiler(boolean errorStatus) {
             try {
                 JavaCompiler c = JavaCompiler.instance(nextContext());
                 if (errorStatus) {
                     c.log.nwarnings += priorWarnings + compiler.log.nwarnings;
                     c.log.nerrors += compiler.log.nerrors;
                 }
                 return c;
             } finally {
                 compiler.close(false);
             }
         }
         /** Return the number of errors found so far in this round.
          * This may include uncoverable errors, such as parse errors,
          * and transient errors, such as missing symbols. */
         int errorCount() {
             return compiler.errorCount();
         }
         /** Return the number of warnings found so far in this round. */
         int warningCount() {
             return compiler.warningCount();
         }
         /** Return whether or not an unrecoverable error has occurred. */
         boolean unrecoverableError() {
             if (messager.errorRaised())
                 return true;
             for (JCDiagnostic d: log.deferredDiagnostics) {
                 switch (d.getKind()) {
                     case WARNING:
                         if (werror)
                             return true;
                         break;
                     case ERROR:
                         if (fatalErrors || !d.isFlagSet(RESOLVE_ERROR))
                             return true;
                         break;
                 }
             }
             return false;
         }
         /** Find the set of annotations present in the set of top level
          *  classes and package info files to be processed this round. */
         void findAnnotationsPresent() {
             ComputeAnnotationSet annotationComputer = new ComputeAnnotationSet(elementUtils);
             // Use annotation processing to compute the set of annotations present
             annotationsPresent = new LinkedHashSet<TypeElement>();
             for (ClassSymbol classSym : topLevelClasses)
                 annotationComputer.scan(classSym, annotationsPresent);
             for (PackageSymbol pkgSym : packageInfoFiles)
                 annotationComputer.scan(pkgSym, annotationsPresent);
         }
         /** Enter a set of generated class files. */
         private List<ClassSymbol> enterClassFiles(Map<String, JavaFileObject> classFiles) {
             ClassReader reader = ClassReader.instance(context);
             Names names = Names.instance(context);
             List<ClassSymbol> list = List.nil();
             for (Map.Entry<String,JavaFileObject> entry : classFiles.entrySet()) {
                 Name name = names.fromString(entry.getKey());
                 JavaFileObject file = entry.getValue();
                 if (file.getKind() != JavaFileObject.Kind.CLASS)
                     throw new AssertionError(file);
                 ClassSymbol cs;
                 if (isPkgInfo(file, JavaFileObject.Kind.CLASS)) {
                     Name packageName = Convert.packagePart(name);
                     PackageSymbol p = reader.enterPackage(packageName);
                     if (p.package_info == null)
                         p.package_info = reader.enterClass(Convert.shortName(name), p);
                     cs = p.package_info;
                     if (cs.classfile == null)
                         cs.classfile = file;
                 } else
                     cs = reader.enterClass(name, file);
                 list = list.prepend(cs);
             }
             return list.reverse();
         }
         /** Enter a set of syntax trees. */
         private void enterTrees(List<JCCompilationUnit> roots) {
             compiler.enterTrees(roots);
         }
         /** Run a processing round. */
         void run(boolean lastRound, boolean errorStatus) {
             printRoundInfo(lastRound);
             TaskListener taskListener = context.get(TaskListener.class);
             if (taskListener != null)
                 taskListener.started(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING_ROUND));
             try {
                 if (lastRound) {
                     filer.setLastRound(true);
                     Set<Element> emptyRootElements = Collections.emptySet(); // immutable
                     RoundEnvironment renv = new JavacRoundEnvironment(true,
                             errorStatus,
                             emptyRootElements,
                             JavacProcessingEnvironment.this);
                     discoveredProcs.iterator().runContributingProcs(renv);
                 } else {
                     discoverAndRunProcs(context, annotationsPresent, topLevelClasses, packageInfoFiles);
                 }
             } finally {
                 if (taskListener != null)
                     taskListener.finished(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING_ROUND));
             }
         }
         void showDiagnostics(boolean showAll) {
             Set<JCDiagnostic.Kind> kinds = EnumSet.allOf(JCDiagnostic.Kind.class);
             if (!showAll) {
                 // suppress errors, which are all presumed to be transient resolve errors
                 kinds.remove(JCDiagnostic.Kind.ERROR);
             }
             log.reportDeferredDiagnostics(kinds);
         }
         /** Update the processing state for the current context. */
         private void updateProcessingState() {
             filer.newRound(context);
             messager.newRound(context);
             elementUtils.setContext(context);
             typeUtils.setContext(context);
         }
         /** Print info about this round. */
         private void printRoundInfo(boolean lastRound) {
             if (printRounds || verbose) {
                 List<ClassSymbol> tlc = lastRound ? List.<ClassSymbol>nil() : topLevelClasses;
                 Set<TypeElement> ap = lastRound ? Collections.<TypeElement>emptySet() : annotationsPresent;
                 log.printNoteLines("x.print.rounds",
                         number,
                         "{" + tlc.toString(", ") + "}",
                         ap,
                         lastRound);
             }
         }
         /** Get the context for the next round of processing.
          * Important values are propogated from round to round;
          * other values are implicitly reset.
          */
         private Context nextContext() {
             Context next = new Context();
             Options options = Options.instance(context);
             assert options != null;
             next.put(Options.optionsKey, options);
             PrintWriter out = context.get(Log.outKey);
             assert out != null;
             next.put(Log.outKey, out);
             final boolean shareNames = true;
             if (shareNames) {
                 Names names = Names.instance(context);
                 assert names != null;
                 next.put(Names.namesKey, names);
             }
             DiagnosticListener<?> dl = context.get(DiagnosticListener.class);
             if (dl != null)
                 next.put(DiagnosticListener.class, dl);
             TaskListener tl = context.get(TaskListener.class);
             if (tl != null)
                 next.put(TaskListener.class, tl);
             JavaFileManager jfm = context.get(JavaFileManager.class);
             assert jfm != null;
             next.put(JavaFileManager.class, jfm);
             if (jfm instanceof JavacFileManager) {
                 ((JavacFileManager)jfm).setContext(next);
             }
             Names names = Names.instance(context);
             assert names != null;
             next.put(Names.namesKey, names);
             Keywords keywords = Keywords.instance(context);
             assert(keywords != null);
             next.put(Keywords.keywordsKey, keywords);
             JavaCompiler oldCompiler = JavaCompiler.instance(context);
             JavaCompiler nextCompiler = JavaCompiler.instance(next);
             nextCompiler.initRound(oldCompiler);
             JavacTaskImpl task = context.get(JavacTaskImpl.class);
             if (task != null) {
                 next.put(JavacTaskImpl.class, task);
                 task.updateContext(next);
             }
             context.clear();
             return next;
         }
     }
     // TODO: internal catch clauses?; catch and rethrow an annotation
     // processing error
     public JavaCompiler doProcessing(Context context,
                                      List<JCCompilationUnit> roots,
                                      List<ClassSymbol> classSymbols,
                                      Iterable<? extends PackageSymbol> pckSymbols) {
         TaskListener taskListener = context.get(TaskListener.class);
         log = Log.instance(context);
         Set<PackageSymbol> specifiedPackages = new LinkedHashSet<PackageSymbol>();
         for (PackageSymbol psym : pckSymbols)
             specifiedPackages.add(psym);
         this.specifiedPackages = Collections.unmodifiableSet(specifiedPackages);
         Round round = new Round(context, roots, classSymbols);
         boolean errorStatus;
         boolean moreToDo;
         do {
             // Run processors for round n
             round.run(false, false);
             // Processors for round n have run to completion.
             // Check for errors and whether there is more work to do.
             errorStatus = round.unrecoverableError();
             moreToDo = moreToDo();
             round.showDiagnostics(errorStatus || showResolveErrors);
             // Set up next round.
             // Copy mutable collections returned from filer.
             round = round.next(
                     new LinkedHashSet<JavaFileObject>(filer.getGeneratedSourceFileObjects()),
                     new LinkedHashMap<String,JavaFileObject>(filer.getGeneratedClasses()));
              // Check for errors during setup.
             if (round.unrecoverableError())
                 errorStatus = true;
         } while (moreToDo && !errorStatus);
         // run last round
         round.run(true, errorStatus);
         round.showDiagnostics(true);
         filer.warnIfUnclosedFiles();
         warnIfUnmatchedOptions();
         /*
          * If an annotation processor raises an error in a round,
          * that round runs to completion and one last round occurs.
          * The last round may also occur because no more source or
          * class files have been generated.  Therefore, if an error
          * was raised on either of the last *two* rounds, the compile
          * should exit with a nonzero exit code.  The current value of
          * errorStatus holds whether or not an error was raised on the
          * second to last round; errorRaised() gives the error status
          * of the last round.
          */
         if (messager.errorRaised()
                 || werror && round.warningCount() > 0 && round.errorCount() > 0)
             errorStatus = true;
         Set<JavaFileObject> newSourceFiles =
                 new LinkedHashSet<JavaFileObject>(filer.getGeneratedSourceFileObjects());
         roots = cleanTrees(round.roots);
         JavaCompiler compiler = round.finalCompiler(errorStatus);
         if (newSourceFiles.size() > 0)
             roots = roots.appendList(compiler.parseFiles(newSourceFiles));
         errorStatus = errorStatus || (compiler.errorCount() > 0);
         // Free resources
         this.close();
         if (taskListener != null)
             taskListener.finished(new TaskEvent(TaskEvent.Kind.ANNOTATION_PROCESSING));
         if (errorStatus) {
             if (compiler.errorCount() == 0)
                 compiler.log.nerrors++;
             return compiler;
         }
         if (procOnly && !foundTypeProcessors) {
             compiler.todo.clear();
         } else {
             if (procOnly && foundTypeProcessors)
                 compiler.shouldStopPolicy = CompileState.FLOW;
             compiler.enterTrees(roots);
         }
         return compiler;
     }
     private void warnIfUnmatchedOptions() {
         if (!unmatchedProcessorOptions.isEmpty()) {
             log.warning("proc.unmatched.processor.options", unmatchedProcessorOptions.toString());
         }
     }
     /**
      * Free resources related to annotation processing.
      */
     public void close() {
         filer.close();
         if (discoveredProcs != null) // Make calling close idempotent
             discoveredProcs.close();
         discoveredProcs = null;
         if (processorClassLoader != null && processorClassLoader instanceof Closeable) {
             try {
                 ((Closeable) processorClassLoader).close();
             } catch (IOException e) {
                 JCDiagnostic msg = diags.fragment("fatal.err.cant.close.loader");
                 throw new FatalError(msg, e);
             }
         }
     }
     private List<ClassSymbol> getTopLevelClasses(List<? extends JCCompilationUnit> units) {
         List<ClassSymbol> classes = List.nil();
         for (JCCompilationUnit unit : units) {
             for (JCTree node : unit.defs) {
                 if (node.getTag() == JCTree.CLASSDEF) {
                     ClassSymbol sym = ((JCClassDecl) node).sym;
                     assert sym != null;
                     classes = classes.prepend(sym);
                 }
             }
         }
         return classes.reverse();
     }
     private List<ClassSymbol> getTopLevelClassesFromClasses(List<? extends ClassSymbol> syms) {
         List<ClassSymbol> classes = List.nil();
         for (ClassSymbol sym : syms) {
             if (!isPkgInfo(sym)) {
                 classes = classes.prepend(sym);
             }
         }
         return classes.reverse();
     }
     private List<PackageSymbol> getPackageInfoFiles(List<? extends JCCompilationUnit> units) {
         List<PackageSymbol> packages = List.nil();
         for (JCCompilationUnit unit : units) {
             if (isPkgInfo(unit.sourcefile, JavaFileObject.Kind.SOURCE)) {
                 packages = packages.prepend(unit.packge);
             }
         }
         return packages.reverse();
     }
     private List<PackageSymbol> getPackageInfoFilesFromClasses(List<? extends ClassSymbol> syms) {
         List<PackageSymbol> packages = List.nil();
         for (ClassSymbol sym : syms) {
             if (isPkgInfo(sym)) {
                 packages = packages.prepend((PackageSymbol) sym.owner);
             }
         }
         return packages.reverse();
     }
     // avoid unchecked warning from use of varargs
     private static <T> List<T> join(List<T> list1, List<T> list2) {
         return list1.appendList(list2);
     }
     private boolean isPkgInfo(JavaFileObject fo, JavaFileObject.Kind kind) {
         return fo.isNameCompatible("package-info", kind);
     }
     private boolean isPkgInfo(ClassSymbol sym) {
         return isPkgInfo(sym.classfile, JavaFileObject.Kind.CLASS) && (sym.packge().package_info == sym);
     }
     /*
      * Called retroactively to determine if a class loader was required,
      * after we have failed to create one.
      */
     private boolean needClassLoader(String procNames, Iterable<? extends File> workingpath) {
         if (procNames != null)
             return true;
         String procPath;
         URL[] urls = new URL[1];
         for(File pathElement : workingpath) {
             try {
                 urls[0] = pathElement.toURI().toURL();
                 if (ServiceProxy.hasService(Processor.class, urls))
                     return true;
             } catch (MalformedURLException ex) {
                 throw new AssertionError(ex);
             }
             catch (ServiceProxy.ServiceConfigurationError e) {
                 log.error("proc.bad.config.file", e.getLocalizedMessage());
                 return true;
             }
         }
         return false;
     }
     private static <T extends JCTree> List<T> cleanTrees(List<T> nodes) {
         for (T node : nodes)
             treeCleaner.scan(node);
         return nodes;
     }
     private static TreeScanner treeCleaner = new TreeScanner() {
             public void scan(JCTree node) {
                 super.scan(node);
                 if (node != null)
                     node.type = null;
             }
             public void visitTopLevel(JCCompilationUnit node) {
                 node.packge = null;
                 super.visitTopLevel(node);
             }
             public void visitClassDef(JCClassDecl node) {
                 node.sym = null;
                 super.visitClassDef(node);
             }
             public void visitMethodDef(JCMethodDecl node) {
                 node.sym = null;
                 super.visitMethodDef(node);
             }
             public void visitVarDef(JCVariableDecl node) {
                 node.sym = null;
                 super.visitVarDef(node);
             }
             public void visitNewClass(JCNewClass node) {
                 node.constructor = null;
                 super.visitNewClass(node);
             }
             public void visitAssignop(JCAssignOp node) {
                 node.operator = null;
                 super.visitAssignop(node);
             }
             public void visitUnary(JCUnary node) {
                 node.operator = null;
                 super.visitUnary(node);
             }
             public void visitBinary(JCBinary node) {
                 node.operator = null;
                 super.visitBinary(node);
             }
             public void visitSelect(JCFieldAccess node) {
                 node.sym = null;
                 super.visitSelect(node);
             }
             public void visitIdent(JCIdent node) {
                 node.sym = null;
                 super.visitIdent(node);
             }
         };
     private boolean moreToDo() {
         return filer.newFiles();
     }
     /**
      * {@inheritdoc}
      *
      * Command line options suitable for presenting to annotation
      * processors.  "-Afoo=bar" should be "-Afoo" => "bar".
      */
     public Map<String,String> getOptions() {
         return processorOptions;
     }
     public Messager getMessager() {
         return messager;
     }
     public Filer getFiler() {
         return filer;
     }
     public JavacElements getElementUtils() {
         return elementUtils;
     }
     public JavacTypes getTypeUtils() {
         return typeUtils;
     }
     public SourceVersion getSourceVersion() {
         return Source.toSourceVersion(source);
     }
     public Locale getLocale() {
         return messages.getCurrentLocale();
     }
     public Set<Symbol.PackageSymbol> getSpecifiedPackages() {
         return specifiedPackages;
     }
     private static final Pattern allMatches = Pattern.compile(".*");
     public static final Pattern noMatches  = Pattern.compile("(\\P{all})+");
     /**
      * Convert import-style string for supported annotations into a
      * regex matching that string.  If the string is a valid
      * import-style string, return a regex that won't match anything.
      */
     private static Pattern importStringToPattern(String s, Processor p, Log log) {
         if (isValidImportString(s)) {
             return validImportStringToPattern(s);
         } else {
             log.warning("proc.malformed.supported.string", s, p.getClass().getName());
             return noMatches; // won't match any valid identifier
         }
     }
     /**
      * Return true if the argument string is a valid import-style
      * string specifying claimed annotations; return false otherwise.
      */
     public static boolean isValidImportString(String s) {
         if (s.equals("*"))
             return true;
         boolean valid = true;
         String t = s;
         int index = t.indexOf('*');
         if (index != -1) {
             // '*' must be last character...
             if (index == t.length() -1) {
                 // ... any and preceding character must be '.'
                 if ( index-1 >= 0 ) {
                     valid = t.charAt(index-1) == '.';
                     // Strip off ".*$" for identifier checks
                     t = t.substring(0, t.length()-2);
                 }
             } else
                 return false;
         }
         // Verify string is off the form (javaId \.)+ or javaId
         if (valid) {
             String[] javaIds = t.split("\\.", t.length()+2);
             for(String javaId: javaIds)
                 valid &= SourceVersion.isIdentifier(javaId);
         }
         return valid;
     }
     public static Pattern validImportStringToPattern(String s) {
         if (s.equals("*")) {
             return allMatches;
         } else {
             String s_prime = s.replace(".", "\\.");
             if (s_prime.endsWith("*")) {
                 s_prime =  s_prime.substring(0, s_prime.length() - 1) + ".+";
             }
             return Pattern.compile(s_prime);
         }
     }
     /**
      * For internal use only.  This method will be
      * removed without warning.
      */
     public Context getContext() {
         return context;
     }
     public String toString() {
         return "javac ProcessingEnvironment";
     }
     public static boolean isValidOptionName(String optionName) {
         for(String s : optionName.split("\\.", -1)) {
             if (!SourceVersion.isIdentifier(s))
                 return false;
         }
         return true;
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java@4124840b35fe (annotated)

src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java