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 void testInferWithBounds1() throws Exception {
   PsiReferenceExpression ref = configure();
   JavaResolveResult resolveResult = ref.advancedResolve(false);
   PsiSubstitutor substitutor = resolveResult.getSubstitutor();
   PsiMethod method = (PsiMethod) resolveResult.getElement();
   PsiType type = substitutor.substitute(method.getTypeParameters()[0]);
   assertEquals("java.lang.String", type.getCanonicalText());
 }
  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;
  }
 @NotNull
 @Override
 public JavaResolveResult[] resolve(
     @NotNull ClsJavaCodeReferenceElementImpl ref, boolean incompleteCode) {
   final JavaResolveResult resolveResult = ref.advancedResolveImpl();
   return resolveResult.getElement() == null
       ? JavaResolveResult.EMPTY_ARRAY
       : new JavaResolveResult[] {resolveResult};
 }
 public MethodCallUsageInfo(
     final PsiElement ref, boolean isToChangeArguments, boolean isToCatchExceptions) {
   super(ref);
   myToChangeArguments = isToChangeArguments;
   myToCatchExceptions = isToCatchExceptions;
   final JavaResolveResult resolveResult = resolveMethod(ref);
   myReferencedMethod = (PsiMethod) resolveResult.getElement();
   mySubstitutor = resolveResult.getSubstitutor();
 }
    @Override
    @Nullable
    public PsiType fun(final PsiMethodCallExpression call) {
      PsiReferenceExpression methodExpression = call.getMethodExpression();
      PsiType theOnly = null;
      final JavaResolveResult[] results = methodExpression.multiResolve(false);
      LanguageLevel languageLevel = PsiUtil.getLanguageLevel(call);

      final PsiElement callParent = PsiUtil.skipParenthesizedExprUp(call.getParent());
      final PsiExpressionList parentArgList;
      if (languageLevel.isAtLeast(LanguageLevel.JDK_1_8)) {
        parentArgList =
            callParent instanceof PsiConditionalExpression
                    && !PsiPolyExpressionUtil.isPolyExpression((PsiExpression) callParent)
                ? null
                : PsiTreeUtil.getParentOfType(call, PsiExpressionList.class);
      } else {
        parentArgList = null;
      }
      final MethodCandidateInfo.CurrentCandidateProperties properties =
          MethodCandidateInfo.getCurrentMethod(parentArgList);
      final boolean genericMethodCall =
          properties != null && properties.getInfo().isToInferApplicability();

      for (int i = 0; i < results.length; i++) {
        final JavaResolveResult candidateInfo = results[i];

        if (genericMethodCall
            && PsiPolyExpressionUtil.isMethodCallPolyExpression(
                call, (PsiMethod) candidateInfo.getElement())) {
          if (callParent instanceof PsiAssignmentExpression) {
            return null;
          }
          LOG.error("poly expression evaluation during overload resolution");
        }

        final PsiType type = getResultType(call, methodExpression, candidateInfo, languageLevel);
        if (type == null) {
          return null;
        }

        if (i == 0) {
          theOnly = type;
        } else if (!theOnly.equals(type)) {
          return null;
        }
      }

      return PsiClassImplUtil.correctType(theOnly, call.getResolveScope());
    }
Example #7
0
  private void specialCase(
      InferenceSession session,
      List<ConstraintFormula> constraints,
      PsiSubstitutor substitutor,
      PsiParameter[] targetParameters,
      boolean ignoreRaw) {
    final PsiElement qualifier = myExpression.getQualifier();
    PsiType qualifierType = null;
    if (qualifier instanceof PsiTypeElement) {
      qualifierType = ((PsiTypeElement) qualifier).getType();
      final PsiClass qualifierClass = PsiUtil.resolveClassInType(qualifierType);
      if (qualifierClass != null) {
        qualifierType =
            JavaPsiFacade.getElementFactory(myExpression.getProject())
                .createType(qualifierClass, PsiSubstitutor.EMPTY);
      }
    } else if (qualifier instanceof PsiExpression) {
      qualifierType = ((PsiExpression) qualifier).getType();
      if (qualifierType == null && qualifier instanceof PsiReferenceExpression) {
        final JavaResolveResult resolveResult =
            ((PsiReferenceExpression) qualifier).advancedResolve(false);
        final PsiElement res = resolveResult.getElement();
        if (res instanceof PsiClass) {
          PsiClass containingClass = (PsiClass) res;
          final boolean isRawSubst =
              !ignoreRaw
                  && !myExpression.isConstructor()
                  && PsiUtil.isRawSubstitutor(containingClass, resolveResult.getSubstitutor());
          qualifierType =
              JavaPsiFacade.getElementFactory(res.getProject())
                  .createType(
                      containingClass,
                      isRawSubst ? PsiSubstitutor.EMPTY : resolveResult.getSubstitutor());
        }
      }
    }

    final PsiClass qualifierClass = PsiUtil.resolveClassInType(qualifierType);
    if (qualifierClass != null) {
      session.initBounds(myExpression, qualifierClass.getTypeParameters());
      constraints.add(
          new StrictSubtypingConstraint(
              session.substituteWithInferenceVariables(qualifierType),
              session.substituteWithInferenceVariables(
                  substitutor.substitute(targetParameters[0].getType()))));
    }
  }
Example #8
0
  public void registerReference(
      @NotNull PsiJavaReference ref, @NotNull JavaResolveResult resolveResult) {
    PsiElement refElement = resolveResult.getElement();
    PsiFile psiFile = refElement == null ? null : refElement.getContainingFile();
    if (psiFile != null)
      psiFile =
          (PsiFile)
              psiFile
                  .getNavigationElement(); // look at navigation elements because all references
                                           // resolve into Cls elements when highlighting library
                                           // source
    if (refElement != null
        && psiFile != null
        && myFile.getViewProvider().equals(psiFile.getViewProvider())) {
      registerLocalRef(ref, refElement.getNavigationElement());
    }

    PsiElement resolveScope = resolveResult.getCurrentFileResolveScope();
    if (resolveScope instanceof PsiImportStatementBase) {
      registerImportStatement(ref, (PsiImportStatementBase) resolveScope);
    }
  }
  public static PsiType captureReturnType(
      PsiMethodCallExpression call,
      PsiMethod method,
      PsiType ret,
      JavaResolveResult result,
      LanguageLevel languageLevel) {
    PsiSubstitutor substitutor = result.getSubstitutor();
    PsiType substitutedReturnType = substitutor.substitute(ret);
    if (substitutedReturnType == null) {
      return TypeConversionUtil.erasure(ret);
    }

    if (InferenceSession.wasUncheckedConversionPerformed(call)) {
      // 18.5.2
      // if unchecked conversion was necessary, then this substitution provides the parameter types
      // of the invocation type,
      // while the return type and thrown types are given by the erasure of m's type (without
      // applying θ').
      // due to https://bugs.openjdk.java.net/browse/JDK-8135087 erasure is called on
      // substitutedReturnType and not on ret type itself as by spec
      return TypeConversionUtil.erasure(substitutedReturnType);
    }

    // 15.12.2.6. Method Invocation Type
    // If unchecked conversion was necessary for the method to be applicable,
    // the parameter types of the invocation type are the parameter types of the method's type,
    // and the return type and thrown types are given by the erasures of the return type and thrown
    // types of the method's type.
    if (!languageLevel.isAtLeast(LanguageLevel.JDK_1_8)
        && (method.hasTypeParameters()
            || JavaVersionService.getInstance().isAtLeast(call, JavaSdkVersion.JDK_1_8))
        && result instanceof MethodCandidateInfo
        && ((MethodCandidateInfo) result).isApplicable()) {
      final PsiType[] args = call.getArgumentList().getExpressionTypes();
      final boolean allowUncheckedConversion = false;
      final int applicabilityLevel =
          PsiUtil.getApplicabilityLevel(
              method, substitutor, args, languageLevel, allowUncheckedConversion, true);
      if (applicabilityLevel == MethodCandidateInfo.ApplicabilityLevel.NOT_APPLICABLE) {
        return TypeConversionUtil.erasure(substitutedReturnType);
      }
    }

    if (PsiUtil.isRawSubstitutor(method, substitutor)) {
      final PsiType returnTypeErasure = TypeConversionUtil.erasure(ret);
      if (Comparing.equal(TypeConversionUtil.erasure(substitutedReturnType), returnTypeErasure)) {
        return returnTypeErasure;
      }
    }
    return PsiUtil.captureToplevelWildcards(substitutedReturnType, call);
  }
    @Nullable
    private static PsiType getResultType(
        PsiMethodCallExpression call,
        PsiReferenceExpression methodExpression,
        JavaResolveResult result,
        @NotNull final LanguageLevel languageLevel) {
      final PsiMethod method = (PsiMethod) result.getElement();
      if (method == null) return null;

      boolean is15OrHigher = languageLevel.compareTo(LanguageLevel.JDK_1_5) >= 0;
      final PsiType getClassReturnType =
          PsiTypesUtil.patchMethodGetClassReturnType(
              call,
              methodExpression,
              method,
              new Condition<IElementType>() {
                @Override
                public boolean value(IElementType type) {
                  return type != JavaElementType.CLASS;
                }
              },
              languageLevel);

      if (getClassReturnType != null) {
        return getClassReturnType;
      }

      PsiType ret = method.getReturnType();
      if (ret == null) return null;
      if (ret instanceof PsiClassType) {
        ret = ((PsiClassType) ret).setLanguageLevel(languageLevel);
      }
      if (is15OrHigher) {
        return captureReturnType(call, method, ret, result, languageLevel);
      }
      return TypeConversionUtil.erasure(ret);
    }
Example #11
0
  @Override
  public boolean reduce(InferenceSession session, List<ConstraintFormula> constraints) {
    if (!LambdaUtil.isFunctionalType(myT)) {
      return false;
    }

    final PsiType groundTargetType =
        FunctionalInterfaceParameterizationUtil.getGroundTargetType(myT);
    final PsiClassType.ClassResolveResult classResolveResult =
        PsiUtil.resolveGenericsClassInType(groundTargetType);
    final PsiMethod interfaceMethod = LambdaUtil.getFunctionalInterfaceMethod(classResolveResult);
    if (interfaceMethod == null) {
      return false;
    }

    final PsiSubstitutor substitutor =
        LambdaUtil.getSubstitutor(interfaceMethod, classResolveResult);
    final PsiParameter[] targetParameters = interfaceMethod.getParameterList().getParameters();
    final PsiType interfaceMethodReturnType = interfaceMethod.getReturnType();
    final PsiType returnType = substitutor.substitute(interfaceMethodReturnType);
    final PsiType[] typeParameters = myExpression.getTypeParameters();

    final PsiMethodReferenceUtil.QualifierResolveResult qualifierResolveResult =
        PsiMethodReferenceUtil.getQualifierResolveResult(myExpression);

    if (!myExpression.isExact()) {
      for (PsiParameter parameter : targetParameters) {
        if (!session.isProperType(substitutor.substitute(parameter.getType()))) {
          return false;
        }
      }
    } else {
      final PsiMember applicableMember = myExpression.getPotentiallyApplicableMember();
      LOG.assertTrue(applicableMember != null);

      final PsiClass applicableMemberContainingClass = applicableMember.getContainingClass();
      final PsiClass containingClass = qualifierResolveResult.getContainingClass();

      PsiSubstitutor psiSubstitutor = qualifierResolveResult.getSubstitutor();
      psiSubstitutor =
          applicableMemberContainingClass == null
                  || containingClass == null
                  || myExpression.isConstructor()
              ? psiSubstitutor
              : TypeConversionUtil.getSuperClassSubstitutor(
                  applicableMemberContainingClass, containingClass, psiSubstitutor);

      PsiType applicableMethodReturnType =
          applicableMember instanceof PsiMethod
              ? ((PsiMethod) applicableMember).getReturnType()
              : null;
      int idx = 0;
      for (PsiTypeParameter param :
          ((PsiTypeParameterListOwner) applicableMember).getTypeParameters()) {
        if (idx < typeParameters.length) {
          psiSubstitutor = psiSubstitutor.put(param, typeParameters[idx++]);
        }
      }
      final PsiParameter[] parameters =
          applicableMember instanceof PsiMethod
              ? ((PsiMethod) applicableMember).getParameterList().getParameters()
              : PsiParameter.EMPTY_ARRAY;
      if (targetParameters.length == parameters.length + 1) {
        specialCase(session, constraints, substitutor, targetParameters, true);
        for (int i = 1; i < targetParameters.length; i++) {
          constraints.add(
              new TypeCompatibilityConstraint(
                  session.substituteWithInferenceVariables(
                      psiSubstitutor.substitute(parameters[i - 1].getType())),
                  substitutor.substitute(targetParameters[i].getType())));
        }
      } else if (targetParameters.length == parameters.length) {
        for (int i = 0; i < targetParameters.length; i++) {
          constraints.add(
              new TypeCompatibilityConstraint(
                  session.substituteWithInferenceVariables(
                      psiSubstitutor.substitute(parameters[i].getType())),
                  substitutor.substitute(targetParameters[i].getType())));
        }
      } else {
        return false;
      }
      if (returnType != PsiType.VOID && returnType != null) {
        if (applicableMethodReturnType == PsiType.VOID) {
          return false;
        }

        if (applicableMethodReturnType != null) {
          constraints.add(
              new TypeCompatibilityConstraint(
                  returnType,
                  session.substituteWithInferenceVariables(
                      psiSubstitutor.substitute(applicableMethodReturnType))));
        } else if (applicableMember instanceof PsiClass
            || applicableMember instanceof PsiMethod
                && ((PsiMethod) applicableMember).isConstructor()) {
          final PsiElementFactory elementFactory =
              JavaPsiFacade.getElementFactory(applicableMember.getProject());
          if (containingClass != null) {
            final PsiType classType =
                session.substituteWithInferenceVariables(
                    elementFactory.createType(containingClass, psiSubstitutor));
            constraints.add(new TypeCompatibilityConstraint(returnType, classType));
          }
        }
      }
      return true;
    }

    final Map<PsiElement, PsiType> map = LambdaUtil.getFunctionalTypeMap();
    final PsiType added = map.put(myExpression, session.startWithFreshVars(groundTargetType));
    final JavaResolveResult resolve;
    try {
      resolve = myExpression.advancedResolve(true);
    } finally {
      if (added == null) {
        map.remove(myExpression);
      }
    }
    final PsiElement element = resolve.getElement();
    if (element == null) {
      return false;
    }

    if (PsiType.VOID.equals(returnType) || returnType == null) {
      return true;
    }

    if (element instanceof PsiMethod) {
      final PsiMethod method = (PsiMethod) element;
      final PsiType referencedMethodReturnType;
      final PsiClass containingClass = method.getContainingClass();
      LOG.assertTrue(containingClass != null, method);
      PsiClass qContainingClass = qualifierResolveResult.getContainingClass();
      PsiSubstitutor psiSubstitutor = qualifierResolveResult.getSubstitutor();
      if (qContainingClass != null) {
        if (PsiUtil.isRawSubstitutor(qContainingClass, psiSubstitutor)) {
          psiSubstitutor = PsiSubstitutor.EMPTY;
        }
        if (qContainingClass.isInheritor(containingClass, true)) {
          psiSubstitutor =
              TypeConversionUtil.getClassSubstitutor(
                  containingClass, qContainingClass, PsiSubstitutor.EMPTY);
          LOG.assertTrue(psiSubstitutor != null);
        }
      }

      if (method.isConstructor()) {
        referencedMethodReturnType =
            JavaPsiFacade.getElementFactory(method.getProject())
                .createType(containingClass, PsiSubstitutor.EMPTY);
      } else {
        referencedMethodReturnType = method.getReturnType();
      }
      LOG.assertTrue(referencedMethodReturnType != null, method);

      if (!PsiTreeUtil.isContextAncestor(containingClass, myExpression, false)
          || PsiUtil.getEnclosingStaticElement(myExpression, containingClass) != null) {
        session.initBounds(myExpression, containingClass.getTypeParameters());
      }

      session.initBounds(myExpression, method.getTypeParameters());

      // if i) the method reference elides NonWildTypeArguments,
      //  ii) the compile-time declaration is a generic method, and
      // iii) the return type of the compile-time declaration mentions at least one of the method's
      // type parameters;
      if (typeParameters.length == 0 && method.getTypeParameters().length > 0) {
        final PsiClass interfaceClass = classResolveResult.getElement();
        LOG.assertTrue(interfaceClass != null);
        if (PsiPolyExpressionUtil.mentionsTypeParameters(
            referencedMethodReturnType, ContainerUtil.newHashSet(method.getTypeParameters()))) {
          // the constraint reduces to the bound set B3 which would be used to determine the method
          // reference's invocation type
          // when targeting the return type of the function type, as defined in 18.5.2.
          session.collectApplicabilityConstraints(
              myExpression, ((MethodCandidateInfo) resolve), groundTargetType);
          session.registerReturnTypeConstraints(referencedMethodReturnType, returnType);
          return true;
        }
      }

      if (PsiType.VOID.equals(referencedMethodReturnType)) {
        return false;
      }

      int idx = 0;
      for (PsiTypeParameter param : method.getTypeParameters()) {
        if (idx < typeParameters.length) {
          psiSubstitutor = psiSubstitutor.put(param, typeParameters[idx++]);
        }
      }

      final PsiParameter[] parameters = method.getParameterList().getParameters();
      if (targetParameters.length == parameters.length + 1
          && !method.isVarArgs()
          && PsiPolyExpressionUtil.mentionsTypeParameters(
              referencedMethodReturnType,
              ContainerUtil.newHashSet(
                  containingClass.getTypeParameters()))) { // todo specification bug?
        specialCase(session, constraints, substitutor, targetParameters, false);
      }
      constraints.add(
          new TypeCompatibilityConstraint(
              returnType,
              session.substituteWithInferenceVariables(
                  psiSubstitutor.substitute(referencedMethodReturnType))));
    }

    return true;
  }
  @Nullable
  public static String getSuspiciousMethodCallMessage(
      @NotNull PsiMethodCallExpression methodCall,
      PsiType argType,
      boolean reportConvertibleMethodCalls,
      @NotNull List<PsiMethod> patternMethods,
      @NotNull IntArrayList indices) {
    final PsiReferenceExpression methodExpression = methodCall.getMethodExpression();
    final PsiExpression qualifier = methodExpression.getQualifierExpression();
    if (qualifier == null
        || qualifier instanceof PsiThisExpression
        || qualifier instanceof PsiSuperExpression) return null;
    if (argType instanceof PsiPrimitiveType) {
      argType = ((PsiPrimitiveType) argType).getBoxedType(methodCall);
    }

    if (!(argType instanceof PsiClassType)) return null;

    final JavaResolveResult resolveResult = methodExpression.advancedResolve(false);
    PsiMethod calleeMethod = (PsiMethod) resolveResult.getElement();
    if (calleeMethod == null) return null;
    PsiMethod contextMethod = PsiTreeUtil.getParentOfType(methodCall, PsiMethod.class);

    //noinspection SynchronizationOnLocalVariableOrMethodParameter
    synchronized (patternMethods) {
      if (patternMethods.isEmpty()) {
        setupPatternMethods(
            methodCall.getManager(), methodCall.getResolveScope(), patternMethods, indices);
      }
    }

    for (int i = 0; i < patternMethods.size(); i++) {
      PsiMethod patternMethod = patternMethods.get(i);
      if (!patternMethod.getName().equals(methodExpression.getReferenceName())) continue;
      int index = indices.get(i);

      // we are in collections method implementation
      if (contextMethod != null && isInheritorOrSelf(contextMethod, patternMethod)) return null;

      final PsiClass calleeClass = calleeMethod.getContainingClass();
      PsiSubstitutor substitutor = resolveResult.getSubstitutor();
      final PsiClass patternClass = patternMethod.getContainingClass();
      assert patternClass != null;
      assert calleeClass != null;
      substitutor = TypeConversionUtil.getClassSubstitutor(patternClass, calleeClass, substitutor);
      if (substitutor == null) continue;

      if (!patternMethod
          .getSignature(substitutor)
          .equals(calleeMethod.getSignature(PsiSubstitutor.EMPTY))) continue;

      PsiTypeParameter[] typeParameters = patternClass.getTypeParameters();
      if (typeParameters.length <= index) return null;
      final PsiTypeParameter typeParameter = typeParameters[index];
      PsiType typeParamMapping = substitutor.substitute(typeParameter);
      if (typeParamMapping == null) return null;

      PsiParameter[] parameters = patternMethod.getParameterList().getParameters();
      if (parameters.length == 1 && "removeAll".equals(patternMethod.getName())) {
        PsiType paramType = parameters[0].getType();
        if (InheritanceUtil.isInheritor(paramType, CommonClassNames.JAVA_UTIL_COLLECTION)) {
          PsiType qualifierType = qualifier.getType();
          if (qualifierType != null) {
            final PsiType itemType =
                JavaGenericsUtil.getCollectionItemType(argType, calleeMethod.getResolveScope());
            final PsiType qualifierItemType =
                JavaGenericsUtil.getCollectionItemType(
                    qualifierType, calleeMethod.getResolveScope());
            if (qualifierItemType != null
                && itemType != null
                && !qualifierItemType.isAssignableFrom(itemType)) {
              return InspectionsBundle.message(
                  "inspection.suspicious.collections.method.calls.problem.descriptor",
                  PsiFormatUtil.formatType(qualifierType, 0, PsiSubstitutor.EMPTY),
                  PsiFormatUtil.formatType(itemType, 0, PsiSubstitutor.EMPTY));
            }
          }
          return null;
        }
      }

      String message = null;
      if (typeParamMapping instanceof PsiCapturedWildcardType) {
        typeParamMapping = ((PsiCapturedWildcardType) typeParamMapping).getWildcard();
      }
      if (!typeParamMapping.isAssignableFrom(argType)) {
        if (typeParamMapping.isConvertibleFrom(argType)) {
          if (reportConvertibleMethodCalls) {
            message =
                InspectionsBundle.message(
                    "inspection.suspicious.collections.method.calls.problem.descriptor1",
                    PsiFormatUtil.formatMethod(
                        calleeMethod,
                        substitutor,
                        PsiFormatUtilBase.SHOW_NAME | PsiFormatUtilBase.SHOW_CONTAINING_CLASS,
                        PsiFormatUtilBase.SHOW_TYPE));
          }
        } else {
          PsiType qualifierType = qualifier.getType();
          if (qualifierType != null) {
            message =
                InspectionsBundle.message(
                    "inspection.suspicious.collections.method.calls.problem.descriptor",
                    PsiFormatUtil.formatType(qualifierType, 0, PsiSubstitutor.EMPTY),
                    PsiFormatUtil.formatType(argType, 0, PsiSubstitutor.EMPTY));
          }
        }
      }
      return message;
    }
    return null;
  }
Example #13
0
  private static void addNamesToImport(
      @NotNull Set<String> names,
      @NotNull PsiElement scope,
      @NotNull String thisPackageName,
      @NotNull Set<String> namesToImportStaticly,
      PsiFile context) {
    if (scope instanceof PsiImportList) return;

    final LinkedList<PsiElement> stack = new LinkedList<PsiElement>();
    stack.add(scope);
    while (!stack.isEmpty()) {
      final PsiElement child = stack.removeFirst();
      if (child instanceof PsiImportList) continue;
      stack.addAll(Arrays.asList(child.getChildren()));

      for (final PsiReference reference : child.getReferences()) {
        if (!(reference instanceof PsiJavaReference)) continue;
        final PsiJavaReference javaReference = (PsiJavaReference) reference;
        if (javaReference instanceof JavaClassReference) {
          if (((JavaClassReference) javaReference).getContextReference() != null) continue;
        }
        PsiJavaCodeReferenceElement referenceElement = null;
        if (reference instanceof PsiJavaCodeReferenceElement) {
          referenceElement = (PsiJavaCodeReferenceElement) child;
          if (referenceElement.getQualifier() != null) {
            continue;
          }
          if (reference instanceof PsiJavaCodeReferenceElementImpl
              && ((PsiJavaCodeReferenceElementImpl) reference).getKind()
                  == PsiJavaCodeReferenceElementImpl.CLASS_IN_QUALIFIED_NEW_KIND) {
            continue;
          }
        }

        final JavaResolveResult resolveResult = javaReference.advancedResolve(true);
        PsiElement refElement = resolveResult.getElement();
        if (refElement == null && referenceElement != null) {
          refElement = ResolveClassUtil.resolveClass(referenceElement); // might be uncomplete code
        }

        PsiElement currentFileResolveScope = resolveResult.getCurrentFileResolveScope();
        if (!(currentFileResolveScope instanceof PsiImportStatementBase)) continue;
        if (context != null
            && currentFileResolveScope instanceof JspxImportStatement
            && context != ((JspxImportStatement) currentFileResolveScope).getDeclarationFile()) {
          continue;
        }

        if (refElement != null) {
          // Add names imported statically
          if (referenceElement != null) {
            if (currentFileResolveScope instanceof PsiImportStaticStatement) {
              PsiImportStaticStatement importStaticStatement =
                  (PsiImportStaticStatement) currentFileResolveScope;
              String name = importStaticStatement.getImportReference().getCanonicalText();
              if (importStaticStatement.isOnDemand()) {
                String refName = referenceElement.getReferenceName();
                if (refName != null) name = name + "." + refName;
              }
              names.add(name);
              namesToImportStaticly.add(name);
              continue;
            }
          }

          if (refElement instanceof PsiClass) {
            String qName = ((PsiClass) refElement).getQualifiedName();
            if (hasPackage(qName, thisPackageName)) continue;
            names.add(qName);
          }
        }
      }
    }
  }
Example #14
0
  private NamesByExprInfo suggestVariableNameByExpressionPlace(
      PsiExpression expr, final VariableKind variableKind, boolean correctKeywords) {
    if (expr.getParent() instanceof PsiExpressionList) {
      PsiExpressionList list = (PsiExpressionList) expr.getParent();
      PsiElement listParent = list.getParent();
      PsiSubstitutor subst = PsiSubstitutor.EMPTY;
      PsiMethod method = null;
      if (listParent instanceof PsiMethodCallExpression) {
        final JavaResolveResult resolveResult =
            ((PsiMethodCallExpression) listParent).getMethodExpression().advancedResolve(false);
        method = (PsiMethod) resolveResult.getElement();
        subst = resolveResult.getSubstitutor();
      } else {
        if (listParent instanceof PsiAnonymousClass) {
          listParent = listParent.getParent();
        }
        if (listParent instanceof PsiNewExpression) {
          method = ((PsiNewExpression) listParent).resolveConstructor();
        }
      }

      if (method != null) {
        final PsiElement navElement = method.getNavigationElement();
        if (navElement instanceof PsiMethod) {
          method = (PsiMethod) navElement;
        }
        PsiExpression[] expressions = list.getExpressions();
        int index = -1;
        for (int i = 0; i < expressions.length; i++) {
          if (expressions[i] == expr) {
            index = i;
            break;
          }
        }
        PsiParameter[] parameters = method.getParameterList().getParameters();
        if (index < parameters.length) {
          String name = parameters[index].getName();
          if (name != null
              && TypeConversionUtil.areTypesAssignmentCompatible(
                  subst.substitute(parameters[index].getType()), expr)) {
            name = variableNameToPropertyName(name, VariableKind.PARAMETER);
            String[] names = getSuggestionsByName(name, variableKind, false, correctKeywords);
            if (expressions.length == 1) {
              final String methodName = method.getName();
              String[] words = NameUtil.nameToWords(methodName);
              if (words.length > 0) {
                final String firstWord = words[0];
                if (SET_PREFIX.equals(firstWord)) {
                  final String propertyName = methodName.substring(firstWord.length());
                  final String[] setterNames =
                      getSuggestionsByName(propertyName, variableKind, false, correctKeywords);
                  names = ArrayUtil.mergeArrays(names, setterNames);
                }
              }
            }
            return new NamesByExprInfo(name, names);
          }
        }
      }
    } else if (expr.getParent() instanceof PsiAssignmentExpression
        && variableKind == VariableKind.PARAMETER) {
      final PsiAssignmentExpression assignmentExpression =
          (PsiAssignmentExpression) expr.getParent();
      if (expr == assignmentExpression.getRExpression()) {
        final PsiExpression leftExpression = assignmentExpression.getLExpression();
        if (leftExpression instanceof PsiReferenceExpression
            && ((PsiReferenceExpression) leftExpression).getQualifier() == null) {
          String name = leftExpression.getText();
          if (name != null) {
            final PsiElement resolve = ((PsiReferenceExpression) leftExpression).resolve();
            if (resolve instanceof PsiVariable) {
              name = variableNameToPropertyName(name, getVariableKind((PsiVariable) resolve));
            }
            String[] names = getSuggestionsByName(name, variableKind, false, correctKeywords);
            return new NamesByExprInfo(name, names);
          }
        }
      }
    }

    return new NamesByExprInfo(null, ArrayUtil.EMPTY_STRING_ARRAY);
  }
  public void registerCastActions(
      CandidateInfo[] candidates,
      PsiCall call,
      HighlightInfo highlightInfo,
      final TextRange fixRange) {
    if (candidates.length == 0) return;
    List<CandidateInfo> methodCandidates = new ArrayList<CandidateInfo>(Arrays.asList(candidates));
    PsiExpressionList list = call.getArgumentList();
    PsiExpression[] expressions = list.getExpressions();
    if (expressions.length == 0) return;
    // filter out not castable candidates
    nextMethod:
    for (int i = methodCandidates.size() - 1; i >= 0; i--) {
      CandidateInfo candidate = methodCandidates.get(i);
      PsiMethod method = (PsiMethod) candidate.getElement();
      PsiSubstitutor substitutor = candidate.getSubstitutor();
      assert method != null;
      PsiParameter[] parameters = method.getParameterList().getParameters();
      if (expressions.length != parameters.length) {
        methodCandidates.remove(i);
        continue;
      }
      for (int j = 0; j < parameters.length; j++) {
        PsiParameter parameter = parameters[j];
        PsiExpression expression = expressions[j];
        // check if we can cast to this method
        PsiType exprType = expression.getType();
        PsiType parameterType = substitutor.substitute(parameter.getType());
        if (exprType == null
            || parameterType == null
            || !areTypesConvertible(exprType, parameterType, call)) {
          methodCandidates.remove(i);
          continue nextMethod;
        }
      }
    }

    if (methodCandidates.isEmpty()) return;

    try {
      for (int i = 0; i < expressions.length; i++) {
        PsiExpression expression = expressions[i];
        PsiType exprType = expression.getType();
        Set<String> suggestedCasts = new THashSet<String>();
        // find to which type we can cast this param to get valid method call
        for (CandidateInfo candidate : methodCandidates) {
          PsiMethod method = (PsiMethod) candidate.getElement();
          PsiSubstitutor substitutor = candidate.getSubstitutor();
          assert method != null;
          PsiParameter[] parameters = method.getParameterList().getParameters();
          PsiType originalParameterType = parameters[i].getType();
          PsiType parameterType = substitutor.substitute(originalParameterType);
          if (parameterType instanceof PsiWildcardType) continue;
          if (!GenericsUtil.isFromExternalTypeLanguage(parameterType)) continue;
          if (suggestedCasts.contains(parameterType.getCanonicalText())) continue;
          // strict compare since even widening cast may help
          if (Comparing.equal(exprType, parameterType)) continue;
          PsiCall newCall = (PsiCall) call.copy();
          PsiExpression modifiedExpression = getModifiedArgument(expression, parameterType);
          if (modifiedExpression == null) continue;
          newCall.getArgumentList().getExpressions()[i].replace(modifiedExpression);
          JavaResolveResult resolveResult = newCall.resolveMethodGenerics();
          if (resolveResult.getElement() != null && resolveResult.isValidResult()) {
            suggestedCasts.add(parameterType.getCanonicalText());
            QuickFixAction.registerQuickFixAction(
                highlightInfo, fixRange, createFix(list, i, parameterType), null);
          }
        }
      }
    } catch (IncorrectOperationException e) {
      LOG.error(e);
    }
  }
 @NotNull
 public JavaResolveResult[] multiResolve(boolean incompleteCode) {
   final JavaResolveResult javaResolveResult = advancedResolve(incompleteCode);
   if (javaResolveResult.getElement() == null) return JavaResolveResult.EMPTY_ARRAY;
   return new JavaResolveResult[] {javaResolveResult};
 }