/**
  * 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
   }
 }
    /**
     * 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);
      }
    }
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  public void visitTopLevel(JCCompilationUnit tree) {
    JavaFileObject prev = log.useSource(tree.sourcefile);
    boolean addEnv = false;
    boolean isPkgInfo =
        tree.sourcefile.isNameCompatible("package-info", JavaFileObject.Kind.SOURCE);
    if (tree.pid != null) {
      tree.packge = reader.enterPackage(TreeInfo.fullName(tree.pid));
      if (tree.packageAnnotations.nonEmpty()) {
        if (isPkgInfo) {
          addEnv = true;
        } else {
          log.error(tree.packageAnnotations.head.pos(), "pkg.annotations.sb.in.package-info.java");
        }
      }
    } else {
      tree.packge = syms.unnamedPackage;
    }
    tree.packge.complete(); // Find all classes in package.
    Env<AttrContext> env = topLevelEnv(tree);

    // Save environment of package-info.java file.
    if (isPkgInfo) {
      Env<AttrContext> env0 = typeEnvs.get(tree.packge);
      if (env0 == null) {
        typeEnvs.put(tree.packge, env);
      } else {
        JCCompilationUnit tree0 = env0.toplevel;
        if (!fileManager.isSameFile(tree.sourcefile, tree0.sourcefile)) {
          log.warning(
              tree.pid != null ? tree.pid.pos() : null, "pkg-info.already.seen", tree.packge);
          if (addEnv
              || (tree0.packageAnnotations.isEmpty()
                  && tree.docComments != null
                  && tree.docComments.get(tree) != null)) {
            typeEnvs.put(tree.packge, env);
          }
        }
      }
    }
    classEnter(tree.defs, env);
    if (addEnv) {
      todo.append(env);
    }
    log.useSource(prev);
    result = null;
  }
  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) {
        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.isSet("displayFilerState")) filer.displayState();
  }
 private void warnIfUnmatchedOptions() {
   if (!unmatchedProcessorOptions.isEmpty()) {
     log.warning("proc.unmatched.processor.options", unmatchedProcessorOptions.toString());
   }
 }