private int substituteToTypeParameters(
      PsiTypeElement typeElement,
      PsiTypeElement inplaceTypeElement,
      PsiType[] paramVals,
      PsiTypeParameter[] params,
      TemplateBuilder builder,
      PsiSubstitutor rawingSubstitutor,
      boolean toplevel) {
    PsiType type = inplaceTypeElement.getType();
    List<PsiType> types = new ArrayList<>();
    for (int i = 0; i < paramVals.length; i++) {
      PsiType val = paramVals[i];
      if (val == null) return SUBSTITUTED_NONE;
      if (type.equals(val)) {
        types.add(myFactory.createType(params[i]));
      }
    }

    if (!types.isEmpty()) {
      Project project = typeElement.getProject();
      PsiType substituted = rawingSubstitutor.substitute(type);
      if (!CommonClassNames.JAVA_LANG_OBJECT.equals(substituted.getCanonicalText())
          && (toplevel || substituted.equals(type))) {
        types.add(substituted);
      }

      builder.replaceElement(
          typeElement,
          new TypeExpression(project, types.toArray(PsiType.createArray(types.size()))));
      return toplevel ? SUBSTITUTED_IN_REF : SUBSTITUTED_IN_PARAMETERS;
    }

    boolean substituted = false;
    PsiJavaCodeReferenceElement ref = typeElement.getInnermostComponentReferenceElement();
    PsiJavaCodeReferenceElement inplaceRef =
        inplaceTypeElement.getInnermostComponentReferenceElement();
    if (ref != null) {
      LOG.assertTrue(inplaceRef != null);
      PsiTypeElement[] innerTypeElements = ref.getParameterList().getTypeParameterElements();
      PsiTypeElement[] inplaceInnerTypeElements =
          inplaceRef.getParameterList().getTypeParameterElements();
      for (int i = 0; i < innerTypeElements.length; i++) {
        substituted |=
            substituteToTypeParameters(
                    innerTypeElements[i],
                    inplaceInnerTypeElements[i],
                    paramVals,
                    params,
                    builder,
                    rawingSubstitutor,
                    false)
                != SUBSTITUTED_NONE;
      }
    }

    return substituted ? SUBSTITUTED_IN_PARAMETERS : SUBSTITUTED_NONE;
  }
 private static void checkMethodReference(
     PsiMethodReferenceExpression expression,
     InspectionManager inspectionManager,
     List<ProblemDescriptor> problems) {
   final PsiTypeElement qualifierTypeElement = expression.getQualifierType();
   if (qualifierTypeElement != null) {
     final PsiType psiType = qualifierTypeElement.getType();
     if (psiType instanceof PsiClassType && !(((PsiClassType) psiType).isRaw())) {
       final JavaResolveResult result = expression.advancedResolve(false);
       final PsiElement element = result.getElement();
       if (element instanceof PsiTypeParameterListOwner) {
         final PsiMethodReferenceExpression copy =
             createMethodReference(expression, qualifierTypeElement);
         final JavaResolveResult simplifiedResolve = copy.advancedResolve(false);
         final PsiElement candidate = simplifiedResolve.getElement();
         if (candidate == element) {
           final PsiJavaCodeReferenceElement referenceElement =
               qualifierTypeElement.getInnermostComponentReferenceElement();
           LOG.assertTrue(referenceElement != null, qualifierTypeElement);
           final PsiReferenceParameterList parameterList = referenceElement.getParameterList();
           LOG.assertTrue(parameterList != null);
           final ProblemDescriptor descriptor =
               inspectionManager.createProblemDescriptor(
                   parameterList,
                   InspectionsBundle.message("inspection.redundant.type.problem.descriptor"),
                   new MyMethodReferenceFixAction(),
                   ProblemHighlightType.LIKE_UNUSED_SYMBOL,
                   false);
           problems.add(descriptor);
         }
       }
     }
   }
 }
  public static boolean isVal(@NotNull PsiTypeElement psiTypeElement) {
    final PsiJavaCodeReferenceElement referenceElement =
        psiTypeElement.getInnermostComponentReferenceElement();
    if (null != referenceElement) {
      final PsiElement psiElement = referenceElement.resolve();
      if (psiElement instanceof PsiClass) {
        final PsiClass psiClass = (PsiClass) psiElement;

        return isSameName(psiClass.getName()) && isSameName(psiClass.getQualifiedName());
      }
    }
    return false;
  }
  @Nullable
  public static HighlightInfo checkApplicability(
      @NotNull PsiAnnotation annotation,
      @NotNull LanguageLevel languageLevel,
      @NotNull PsiFile containingFile) {
    if (ANY_ANNOTATION_ALLOWED.accepts(annotation)) {
      return null;
    }

    PsiJavaCodeReferenceElement nameRef = annotation.getNameReferenceElement();
    if (nameRef == null) return null;

    PsiAnnotationOwner owner = annotation.getOwner();
    PsiAnnotation.TargetType[] targets = PsiImplUtil.getTargetsForLocation(owner);
    if (owner == null || targets.length == 0) {
      String message = JavaErrorMessages.message("annotation.not.allowed.here");
      return annotationError(annotation, message);
    }

    if (!(owner instanceof PsiModifierList)) {
      HighlightInfo info =
          HighlightUtil.checkTypeAnnotationFeature(annotation, languageLevel, containingFile);
      if (info != null) return info;
    }

    PsiAnnotation.TargetType applicable = PsiImplUtil.findApplicableTarget(annotation, targets);
    if (applicable == PsiAnnotation.TargetType.UNKNOWN) return null;

    if (applicable == null) {
      String target = JavaErrorMessages.message("annotation.target." + targets[0]);
      String message =
          JavaErrorMessages.message("annotation.not.applicable", nameRef.getText(), target);
      return annotationError(annotation, message);
    }

    if (applicable == PsiAnnotation.TargetType.TYPE_USE) {
      if (owner instanceof PsiClassReferenceType) {
        PsiJavaCodeReferenceElement ref = ((PsiClassReferenceType) owner).getReference();
        HighlightInfo info = checkReferenceTarget(annotation, ref);
        if (info != null) return info;
      } else if (owner instanceof PsiModifierList) {
        PsiElement nextElement =
            PsiTreeUtil.skipSiblingsForward(
                (PsiModifierList) owner,
                PsiComment.class,
                PsiWhiteSpace.class,
                PsiTypeParameterList.class);
        if (nextElement instanceof PsiTypeElement) {
          PsiTypeElement typeElement = (PsiTypeElement) nextElement;
          PsiType type = typeElement.getType();
          if (PsiType.VOID.equals(type)) {
            String message = JavaErrorMessages.message("annotation.not.allowed.void");
            return annotationError(annotation, message);
          }
          if (!(type instanceof PsiPrimitiveType)) {
            PsiJavaCodeReferenceElement ref =
                getOutermostReferenceElement(typeElement.getInnermostComponentReferenceElement());
            HighlightInfo info = checkReferenceTarget(annotation, ref);
            if (info != null) return info;
          }
        }
      } else if (owner instanceof PsiTypeElement) {
        PsiElement context =
            PsiTreeUtil.skipParentsOfType((PsiTypeElement) owner, PsiTypeElement.class);
        if (context instanceof PsiClassObjectAccessExpression) {
          String message = JavaErrorMessages.message("annotation.not.allowed.class");
          return annotationError(annotation, message);
        }
      }
    }

    return null;
  }
Esempio n. 5
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  @Override
  public void beforeCompletion(@NotNull final CompletionInitializationContext context) {
    final PsiFile file = context.getFile();

    if (file instanceof PsiJavaFile) {
      if (context.getInvocationCount() > 0) {
        autoImport(file, context.getStartOffset() - 1, context.getEditor());

        PsiElement leaf = file.findElementAt(context.getStartOffset() - 1);
        if (leaf != null) leaf = PsiTreeUtil.prevVisibleLeaf(leaf);

        PsiVariable variable = PsiTreeUtil.getParentOfType(leaf, PsiVariable.class);
        if (variable != null) {
          PsiTypeElement typeElement = variable.getTypeElement();
          if (typeElement != null) {
            PsiType type = typeElement.getType();
            if (type instanceof PsiClassType && ((PsiClassType) type).resolve() == null) {
              autoImportReference(
                  file, context.getEditor(), typeElement.getInnermostComponentReferenceElement());
            }
          }
        }
      }

      JavaCompletionUtil.initOffsets(file, context.getOffsetMap());

      if (context.getCompletionType() == CompletionType.BASIC) {
        if (semicolonNeeded(context.getEditor(), file, context.getStartOffset())) {
          context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
          return;
        }

        final PsiJavaCodeReferenceElement ref =
            PsiTreeUtil.findElementOfClassAtOffset(
                file, context.getStartOffset(), PsiJavaCodeReferenceElement.class, false);
        if (ref != null && !(ref instanceof PsiReferenceExpression)) {
          if (ref.getParent() instanceof PsiTypeElement) {
            context.setDummyIdentifier(
                CompletionInitializationContext.DUMMY_IDENTIFIER.trim() + ";");
          }

          if (JavaSmartCompletionContributor.AFTER_NEW.accepts(ref)) {
            final PsiReferenceParameterList paramList = ref.getParameterList();
            if (paramList != null && paramList.getTextLength() > 0) {
              context
                  .getOffsetMap()
                  .addOffset(
                      ConstructorInsertHandler.PARAM_LIST_START,
                      paramList.getTextRange().getStartOffset());
              context
                  .getOffsetMap()
                  .addOffset(
                      ConstructorInsertHandler.PARAM_LIST_END,
                      paramList.getTextRange().getEndOffset());
            }
          }

          return;
        }

        final PsiElement element = file.findElementAt(context.getStartOffset());

        if (psiElement().inside(PsiAnnotation.class).accepts(element)) {
          return;
        }

        context.setDummyIdentifier(CompletionInitializationContext.DUMMY_IDENTIFIER_TRIMMED);
      }
    }
  }
  public void setupTypeElement(
      PsiTypeElement typeElement,
      ExpectedTypeInfo[] infos,
      PsiSubstitutor substitutor,
      TemplateBuilder builder,
      @Nullable PsiElement context,
      PsiClass targetClass) {
    LOG.assertTrue(typeElement.isValid());
    ApplicationManager.getApplication().assertWriteAccessAllowed();

    PsiManager manager = typeElement.getManager();
    GlobalSearchScope scope = typeElement.getResolveScope();
    Project project = manager.getProject();

    if (infos.length == 1 && substitutor != null && substitutor != PsiSubstitutor.EMPTY) {
      ExpectedTypeInfo info = infos[0];
      Map<PsiTypeParameter, PsiType> map = substitutor.getSubstitutionMap();
      PsiType[] vals = map.values().toArray(PsiType.createArray(map.size()));
      PsiTypeParameter[] params = map.keySet().toArray(new PsiTypeParameter[map.size()]);

      List<PsiType> types = matchingTypeParameters(vals, params, info);
      if (!types.isEmpty()) {
        ContainerUtil.addAll(
            types,
            ExpectedTypesProvider.processExpectedTypes(
                infos, new MyTypeVisitor(manager, scope), project));
        builder.replaceElement(
            typeElement,
            new TypeExpression(project, types.toArray(PsiType.createArray(types.size()))));
        return;
      } else {
        PsiElementFactory factory =
            JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
        PsiType type = info.getType();
        PsiType defaultType = info.getDefaultType();
        try {
          PsiTypeElement inplaceTypeElement =
              ((PsiVariable)
                      factory.createVariableDeclarationStatement("foo", type, null)
                          .getDeclaredElements()[0])
                  .getTypeElement();

          PsiSubstitutor rawingSubstitutor = getRawingSubstitutor(context, targetClass);
          int substitionResult =
              substituteToTypeParameters(
                  typeElement, inplaceTypeElement, vals, params, builder, rawingSubstitutor, true);
          if (substitionResult != SUBSTITUTED_NONE) {
            if (substitionResult == SUBSTITUTED_IN_PARAMETERS) {
              PsiJavaCodeReferenceElement refElement =
                  typeElement.getInnermostComponentReferenceElement();
              LOG.assertTrue(refElement != null && refElement.getReferenceNameElement() != null);
              type = getComponentType(type);
              LOG.assertTrue(type != null);
              defaultType = getComponentType(defaultType);
              LOG.assertTrue(defaultType != null);
              ExpectedTypeInfo info1 =
                  ExpectedTypesProvider.createInfo(
                      ((PsiClassType) defaultType).rawType(),
                      ExpectedTypeInfo.TYPE_STRICTLY,
                      ((PsiClassType) defaultType).rawType(),
                      info.getTailType());
              MyTypeVisitor visitor = new MyTypeVisitor(manager, scope);
              builder.replaceElement(
                  refElement.getReferenceNameElement(),
                  new TypeExpression(
                      project,
                      ExpectedTypesProvider.processExpectedTypes(
                          new ExpectedTypeInfo[] {info1}, visitor, project)));
            }

            return;
          }
        } catch (IncorrectOperationException e) {
          LOG.error(e);
        }
      }
    }

    PsiType[] types =
        infos.length == 0
            ? new PsiType[] {typeElement.getType()}
            : ExpectedTypesProvider.processExpectedTypes(
                infos, new MyTypeVisitor(manager, scope), project);
    builder.replaceElement(typeElement, new TypeExpression(project, types));
  }