public PsiElement bindToElement(@NotNull PsiElement element) throws IncorrectOperationException {
    if (isReferenceTo(element)) return getElement();

    final String newName;
    if (element instanceof PsiClass) {
      PsiClass psiClass = (PsiClass) element;
      final boolean jvmFormat =
          Boolean.TRUE.equals(JavaClassReferenceProvider.JVM_FORMAT.getValue(getOptions()));
      newName = jvmFormat ? ClassUtil.getJVMClassName(psiClass) : psiClass.getQualifiedName();
    } else if (element instanceof PsiPackage) {
      PsiPackage psiPackage = (PsiPackage) element;
      newName = psiPackage.getQualifiedName();
    } else {
      throw new IncorrectOperationException("Cannot bind to " + element);
    }
    assert newName != null;

    TextRange range =
        new TextRange(
            myJavaClassReferenceSet.getReference(0).getRangeInElement().getStartOffset(),
            getRangeInElement().getEndOffset());
    final ElementManipulator<PsiElement> manipulator = getManipulator(getElement());
    if (manipulator != null) {
      final PsiElement finalElement = manipulator.handleContentChange(getElement(), range, newName);
      range = new TextRange(range.getStartOffset(), range.getStartOffset() + newName.length());
      myJavaClassReferenceSet.reparse(finalElement, range);
      return finalElement;
    }
    return element;
  }
 public JavaClassReference(
     final JavaClassReferenceSet referenceSet,
     TextRange range,
     int index,
     String text,
     final boolean staticImport) {
   super(referenceSet.getProvider());
   myInStaticImport = staticImport;
   LOG.assertTrue(range.getEndOffset() <= referenceSet.getElement().getTextLength());
   myIndex = index;
   myRange = range;
   myText = text;
   myJavaClassReferenceSet = referenceSet;
 }
 private boolean isStaticClassReference(final String s, boolean strict) {
   if (myIndex == 0) {
     return false;
   }
   char c = s.charAt(getRangeInElement().getStartOffset() - 1);
   return myJavaClassReferenceSet.isStaticSeparator(c, strict);
 }
  private JavaResolveResult advancedResolveInner(final PsiElement psiElement, final String qName) {
    final PsiManager manager = psiElement.getManager();
    final GlobalSearchScope scope = getScope();
    if (myIndex == myJavaClassReferenceSet.getReferences().length - 1) {
      final PsiClass aClass =
          JavaPsiFacade.getInstance(manager.getProject()).findClass(qName, scope);
      if (aClass != null) {
        return new ClassCandidateInfo(aClass, PsiSubstitutor.EMPTY, false, psiElement);
      } else {
        if (!JavaClassReferenceProvider.ADVANCED_RESOLVE.getBooleanValue(getOptions())) {
          return JavaResolveResult.EMPTY;
        }
      }
    }
    PsiElement resolveResult = JavaPsiFacade.getInstance(manager.getProject()).findPackage(qName);
    if (resolveResult == null) {
      resolveResult = JavaPsiFacade.getInstance(manager.getProject()).findClass(qName, scope);
    }
    if (myInStaticImport && resolveResult == null) {
      resolveResult = resolveMember(qName, manager, getElement().getResolveScope());
    }
    if (resolveResult == null) {
      PsiFile containingFile = psiElement.getContainingFile();

      if (containingFile instanceof PsiJavaFile) {
        if (containingFile instanceof JspFile) {
          containingFile = containingFile.getViewProvider().getPsi(StdLanguages.JAVA);
          if (containingFile == null) return JavaResolveResult.EMPTY;
        }

        final ClassResolverProcessor processor =
            new ClassResolverProcessor(getCanonicalText(), psiElement);
        containingFile.processDeclarations(processor, ResolveState.initial(), null, psiElement);

        if (processor.getResult().length == 1) {
          final JavaResolveResult javaResolveResult = processor.getResult()[0];

          if (javaResolveResult != JavaResolveResult.EMPTY && getOptions() != null) {
            final Boolean value =
                JavaClassReferenceProvider.RESOLVE_QUALIFIED_CLASS_NAME.getValue(getOptions());
            final PsiClass psiClass = (PsiClass) javaResolveResult.getElement();
            if (value != null && value.booleanValue() && psiClass != null) {
              final String qualifiedName = psiClass.getQualifiedName();

              if (!qName.equals(qualifiedName)) {
                return JavaResolveResult.EMPTY;
              }
            }
          }

          return javaResolveResult;
        }
      }
    }
    return resolveResult != null
        ? new CandidateInfo(resolveResult, PsiSubstitutor.EMPTY, false, false, psiElement)
        : JavaResolveResult.EMPTY;
  }
 private GlobalSearchScope getScope() {
   final GlobalSearchScope scope = myJavaClassReferenceSet.getProvider().getScope();
   if (scope == null) {
     final Module module = ModuleUtil.findModuleForPsiElement(getElement());
     if (module != null) {
       return module.getModuleWithDependenciesAndLibrariesScope(true);
     }
     return GlobalSearchScope.allScope(getElement().getProject());
   }
   return scope;
 }
  private JavaResolveResult doAdvancedResolve() {
    final PsiElement psiElement = getElement();

    if (!psiElement.isValid()) return JavaResolveResult.EMPTY;

    final String elementText = psiElement.getText();

    final PsiElement context = getContext();
    if (context instanceof PsiClass) {
      if (isStaticClassReference(elementText, false)) {
        final PsiClass psiClass =
            ((PsiClass) context).findInnerClassByName(getCanonicalText(), false);
        if (psiClass != null)
          return new ClassCandidateInfo(psiClass, PsiSubstitutor.EMPTY, false, psiElement);
        PsiElement member = doResolveMember((PsiClass) context, myText);
        return member == null
            ? JavaResolveResult.EMPTY
            : new CandidateInfo(member, PsiSubstitutor.EMPTY, false, false, psiElement);
      } else if (!myInStaticImport && myJavaClassReferenceSet.isAllowDollarInNames()) {
        return JavaResolveResult.EMPTY;
      }
    }

    final int endOffset = getRangeInElement().getEndOffset();
    LOG.assertTrue(endOffset <= elementText.length(), elementText);
    final int startOffset =
        myJavaClassReferenceSet.getReference(0).getRangeInElement().getStartOffset();
    final String qName = elementText.substring(startOffset, endOffset);
    if (!qName.contains(".")) {
      final String defaultPackage =
          JavaClassReferenceProvider.DEFAULT_PACKAGE.getValue(getOptions());
      if (StringUtil.isNotEmpty(defaultPackage)) {
        final JavaResolveResult resolveResult =
            advancedResolveInner(psiElement, defaultPackage + "." + qName);
        if (resolveResult != JavaResolveResult.EMPTY) {
          return resolveResult;
        }
      }
    }
    return advancedResolveInner(psiElement, qName);
  }
  @NotNull
  private Object[] getSubclassVariants(
      @NotNull PsiPackage context, @NotNull String[] extendClasses) {
    HashSet<Object> lookups = new HashSet<Object>();
    GlobalSearchScope packageScope = PackageScope.packageScope(context, true);
    GlobalSearchScope scope = myJavaClassReferenceSet.getProvider().getScope();
    if (scope != null) {
      packageScope = packageScope.intersectWith(scope);
    }
    final GlobalSearchScope allScope = ProjectScope.getAllScope(context.getProject());
    final boolean instantiatable =
        JavaClassReferenceProvider.INSTANTIATABLE.getBooleanValue(getOptions());
    final boolean notInterface =
        JavaClassReferenceProvider.NOT_INTERFACE.getBooleanValue(getOptions());
    final boolean notEnum = JavaClassReferenceProvider.NOT_ENUM.getBooleanValue(getOptions());
    final boolean concrete = JavaClassReferenceProvider.CONCRETE.getBooleanValue(getOptions());

    final ClassKind classKind = getClassKind();

    for (String extendClassName : extendClasses) {
      final PsiClass extendClass =
          JavaPsiFacade.getInstance(context.getProject()).findClass(extendClassName, allScope);
      if (extendClass != null) {
        // add itself
        if (packageScope.contains(extendClass.getContainingFile().getVirtualFile())) {
          if (isClassAccepted(
              extendClass, classKind, instantiatable, concrete, notInterface, notEnum)) {
            ContainerUtil.addIfNotNull(createSubclassLookupValue(context, extendClass), lookups);
          }
        }
        for (final PsiClass clazz : ClassInheritorsSearch.search(extendClass, packageScope, true)) {
          if (isClassAccepted(clazz, classKind, instantiatable, concrete, notInterface, notEnum)) {
            ContainerUtil.addIfNotNull(createSubclassLookupValue(context, clazz), lookups);
          }
        }
      }
    }
    return lookups.toArray();
  }
 public String getUnresolvedMessagePattern() {
   return myJavaClassReferenceSet.getUnresolvedMessagePattern(myIndex);
 }
 @Nullable
 private Map<CustomizableReferenceProvider.CustomizationKey, Object> getOptions() {
   return myJavaClassReferenceSet.getOptions();
 }
 public boolean isSoft() {
   return myJavaClassReferenceSet.isSoft();
 }
 public PsiElement getElement() {
   return myJavaClassReferenceSet.getElement();
 }
 private boolean canReferencePackage() {
   return myJavaClassReferenceSet.canReferencePackage(myIndex);
 }
 @Nullable
 public PsiReference getContextReference() {
   return myIndex > 0 ? myJavaClassReferenceSet.getReference(myIndex - 1) : null;
 }