public static void registerQuickFix(
     PsiMember refElement,
     PsiJavaCodeReferenceElement place,
     PsiClass accessObjectClass,
     HighlightInfo error) {
   if (refElement instanceof PsiField && place instanceof PsiReferenceExpression) {
     final PsiField psiField = (PsiField) refElement;
     final PsiClass containingClass = psiField.getContainingClass();
     if (containingClass != null) {
       if (PsiUtil.isOnAssignmentLeftHand((PsiExpression) place)) {
         final PsiMethod setterPrototype = PropertyUtil.generateSetterPrototype(psiField);
         final PsiMethod setter = containingClass.findMethodBySignature(setterPrototype, true);
         if (setter != null && PsiUtil.isAccessible(setter, place, accessObjectClass)) {
           QuickFixAction.registerQuickFixAction(
               error, new ReplaceInaccessibleFieldWithGetterSetterFix(place, setter, true));
         }
       } else if (PsiUtil.isAccessedForReading((PsiExpression) place)) {
         final PsiMethod getterPrototype = PropertyUtil.generateGetterPrototype(psiField);
         final PsiMethod getter = containingClass.findMethodBySignature(getterPrototype, true);
         if (getter != null && PsiUtil.isAccessible(getter, place, accessObjectClass)) {
           QuickFixAction.registerQuickFixAction(
               error, new ReplaceInaccessibleFieldWithGetterSetterFix(place, getter, false));
         }
       }
     }
   }
 }
 private static ArrayList<PsiMethod> filterConstructorsIfFieldAlreadyAssigned(
     PsiMethod[] constructors, PsiField field) {
   final ArrayList<PsiMethod> result = new ArrayList<PsiMethod>(Arrays.asList(constructors));
   for (PsiReference reference :
       ReferencesSearch.search(field, new LocalSearchScope(constructors))) {
     final PsiElement element = reference.getElement();
     if (element instanceof PsiReferenceExpression
         && PsiUtil.isOnAssignmentLeftHand((PsiExpression) element)) {
       result.remove(PsiTreeUtil.getParentOfType(element, PsiMethod.class));
     }
   }
   return result;
 }
  @Nullable
  public NonCodeUsageSearchInfo findUsages(
      @NotNull final PsiElement element,
      @NotNull final PsiElement[] allElementsToDelete,
      @NotNull final List<UsageInfo> usages) {
    Condition<PsiElement> insideDeletedCondition = getUsageInsideDeletedFilter(allElementsToDelete);
    if (element instanceof PsiClass) {
      findClassUsages((PsiClass) element, allElementsToDelete, usages);
      if (element instanceof PsiTypeParameter) {
        findTypeParameterExternalUsages((PsiTypeParameter) element, usages);
      }
    } else if (element instanceof PsiMethod) {
      insideDeletedCondition = findMethodUsages((PsiMethod) element, allElementsToDelete, usages);
    } else if (element instanceof PsiField) {
      insideDeletedCondition = findFieldUsages((PsiField) element, usages, allElementsToDelete);
    } else if (element instanceof PsiParameter) {
      LOG.assertTrue(((PsiParameter) element).getDeclarationScope() instanceof PsiMethod);
      findParameterUsages((PsiParameter) element, usages);
    } else if (element instanceof PsiLocalVariable) {
      for (PsiReference reference : ReferencesSearch.search(element)) {
        PsiReferenceExpression referencedElement = (PsiReferenceExpression) reference.getElement();
        final PsiStatement statement =
            PsiTreeUtil.getParentOfType(referencedElement, PsiStatement.class);

        boolean isSafeToDelete = PsiUtil.isAccessedForWriting(referencedElement);
        boolean hasSideEffects = false;
        if (PsiUtil.isOnAssignmentLeftHand(referencedElement)) {
          hasSideEffects =
              RemoveUnusedVariableUtil.checkSideEffects(
                  ((PsiAssignmentExpression) referencedElement.getParent()).getRExpression(),
                  ((PsiLocalVariable) element),
                  new ArrayList<>());
        }
        usages.add(
            new SafeDeleteReferenceJavaDeleteUsageInfo(
                statement, element, isSafeToDelete && !hasSideEffects));
      }
    }
    return new NonCodeUsageSearchInfo(insideDeletedCondition, element);
  }
  public void inlineElement(
      final Project project, final Editor editor, final PsiElement psiElement) {
    final PsiParameter psiParameter = (PsiParameter) psiElement;
    final PsiParameterList parameterList = (PsiParameterList) psiParameter.getParent();
    if (!(parameterList.getParent() instanceof PsiMethod)) {
      return;
    }
    final int index = parameterList.getParameterIndex(psiParameter);
    final PsiMethod method = (PsiMethod) parameterList.getParent();

    String errorMessage = getCannotInlineMessage(psiParameter, method);
    if (errorMessage != null) {
      CommonRefactoringUtil.showErrorHint(
          project,
          editor,
          errorMessage,
          RefactoringBundle.message("inline.parameter.refactoring"),
          null);
      return;
    }

    final Ref<PsiExpression> refInitializer = new Ref<PsiExpression>();
    final Ref<PsiExpression> refConstantInitializer = new Ref<PsiExpression>();
    final Ref<PsiCallExpression> refMethodCall = new Ref<PsiCallExpression>();
    final List<PsiReference> occurrences =
        Collections.synchronizedList(new ArrayList<PsiReference>());
    final Collection<PsiFile> containingFiles = Collections.synchronizedSet(new HashSet<PsiFile>());
    containingFiles.add(psiParameter.getContainingFile());
    boolean result =
        ReferencesSearch.search(method)
            .forEach(
                new Processor<PsiReference>() {
                  public boolean process(final PsiReference psiReference) {
                    PsiElement element = psiReference.getElement();
                    final PsiElement parent = element.getParent();
                    if (parent instanceof PsiCallExpression) {
                      final PsiCallExpression methodCall = (PsiCallExpression) parent;
                      occurrences.add(psiReference);
                      containingFiles.add(element.getContainingFile());
                      final PsiExpression[] expressions =
                          methodCall.getArgumentList().getExpressions();
                      if (expressions.length <= index) return false;
                      PsiExpression argument = expressions[index];
                      if (!refInitializer.isNull()) {
                        return argument != null
                            && PsiEquivalenceUtil.areElementsEquivalent(
                                refInitializer.get(), argument)
                            && PsiEquivalenceUtil.areElementsEquivalent(
                                refMethodCall.get(), methodCall);
                      }
                      if (InlineToAnonymousConstructorProcessor.isConstant(argument)
                          || getReferencedFinalField(argument) != null) {
                        if (refConstantInitializer.isNull()) {
                          refConstantInitializer.set(argument);
                        } else if (!isSameConstant(argument, refConstantInitializer.get())) {
                          return false;
                        }
                      } else if (!isRecursiveReferencedParameter(argument, psiParameter)) {
                        if (!refConstantInitializer.isNull()) return false;
                        refInitializer.set(argument);
                        refMethodCall.set(methodCall);
                      }
                    }
                    return true;
                  }
                });
    final int offset = editor.getCaretModel().getOffset();
    final PsiElement refExpr = psiElement.getContainingFile().findElementAt(offset);
    final PsiCodeBlock codeBlock = PsiTreeUtil.getParentOfType(refExpr, PsiCodeBlock.class);
    if (codeBlock != null) {
      final PsiElement[] defs = DefUseUtil.getDefs(codeBlock, psiParameter, refExpr);
      if (defs.length == 1) {
        final PsiElement def = defs[0];
        if (def instanceof PsiReferenceExpression
            && PsiUtil.isOnAssignmentLeftHand((PsiExpression) def)) {
          final PsiExpression rExpr = ((PsiAssignmentExpression) def.getParent()).getRExpression();
          if (rExpr != null) {
            final PsiElement[] refs = DefUseUtil.getRefs(codeBlock, psiParameter, refExpr);

            if (InlineLocalHandler.checkRefsInAugmentedAssignmentOrUnaryModified(refs, def)
                == null) {
              new WriteCommandAction(project) {
                @Override
                protected void run(Result result) throws Throwable {
                  for (final PsiElement ref : refs) {
                    InlineUtil.inlineVariable(
                        psiParameter, rExpr, (PsiJavaCodeReferenceElement) ref);
                  }
                  def.getParent().delete();
                }
              }.execute();
              return;
            }
          }
        }
      }
    }
    if (occurrences.isEmpty()) {
      CommonRefactoringUtil.showErrorHint(
          project,
          editor,
          "Method has no usages",
          RefactoringBundle.message("inline.parameter.refactoring"),
          null);
      return;
    }
    if (!result) {
      CommonRefactoringUtil.showErrorHint(
          project,
          editor,
          "Cannot find constant initializer for parameter",
          RefactoringBundle.message("inline.parameter.refactoring"),
          null);
      return;
    }
    if (!refInitializer.isNull()) {
      if (ApplicationManager.getApplication().isUnitTestMode()) {
        final InlineParameterExpressionProcessor processor =
            new InlineParameterExpressionProcessor(
                refMethodCall.get(),
                method,
                psiParameter,
                refInitializer.get(),
                method
                    .getProject()
                    .getUserData(InlineParameterExpressionProcessor.CREATE_LOCAL_FOR_TESTS));
        processor.run();
      } else {
        final boolean createLocal = ReferencesSearch.search(psiParameter).findAll().size() > 1;
        InlineParameterDialog dlg =
            new InlineParameterDialog(
                refMethodCall.get(), method, psiParameter, refInitializer.get(), createLocal);
        dlg.show();
      }
      return;
    }
    if (refConstantInitializer.isNull()) {
      CommonRefactoringUtil.showErrorHint(
          project,
          editor,
          "Cannot find constant initializer for parameter",
          RefactoringBundle.message("inline.parameter.refactoring"),
          null);
      return;
    }

    final Ref<Boolean> isNotConstantAccessible = new Ref<Boolean>();
    final PsiExpression constantExpression = refConstantInitializer.get();
    constantExpression.accept(
        new JavaRecursiveElementVisitor() {
          @Override
          public void visitReferenceExpression(PsiReferenceExpression expression) {
            super.visitReferenceExpression(expression);
            final PsiElement resolved = expression.resolve();
            if (resolved instanceof PsiMember
                && !PsiUtil.isAccessible((PsiMember) resolved, method, null)) {
              isNotConstantAccessible.set(Boolean.TRUE);
            }
          }
        });
    if (!isNotConstantAccessible.isNull() && isNotConstantAccessible.get()) {
      CommonRefactoringUtil.showErrorHint(
          project,
          editor,
          "Constant initializer is not accessible in method body",
          RefactoringBundle.message("inline.parameter.refactoring"),
          null);
      return;
    }

    for (PsiReference psiReference : ReferencesSearch.search(psiParameter)) {
      final PsiElement element = psiReference.getElement();
      if (element instanceof PsiExpression
          && PsiUtil.isAccessedForWriting((PsiExpression) element)) {
        CommonRefactoringUtil.showErrorHint(
            project,
            editor,
            "Inline parameter which has write usages is not supported",
            RefactoringBundle.message("inline.parameter.refactoring"),
            null);
        return;
      }
    }

    if (!ApplicationManager.getApplication().isUnitTestMode()) {
      String occurencesString = RefactoringBundle.message("occurences.string", occurrences.size());
      String question =
          RefactoringBundle.message(
                  "inline.parameter.confirmation",
                  psiParameter.getName(),
                  constantExpression.getText())
              + " "
              + occurencesString;
      RefactoringMessageDialog dialog =
          new RefactoringMessageDialog(
              REFACTORING_NAME,
              question,
              HelpID.INLINE_VARIABLE,
              "OptionPane.questionIcon",
              true,
              project);
      dialog.show();
      if (!dialog.isOK()) {
        return;
      }
    }

    final RefactoringEventData data = new RefactoringEventData();
    data.addElement(psiElement.copy());
    project
        .getMessageBus()
        .syncPublisher(RefactoringEventListener.REFACTORING_EVENT_TOPIC)
        .refactoringStarted(REFACTORING_ID, data);

    SameParameterValueInspection.InlineParameterValueFix.inlineSameParameterValue(
        method, psiParameter, constantExpression);

    project
        .getMessageBus()
        .syncPublisher(RefactoringEventListener.REFACTORING_EVENT_TOPIC)
        .refactoringDone(REFACTORING_ID, null);
  }
  @Nullable
  public static PsiType getFunctionalInterfaceType(
      PsiElement expression, final boolean tryToSubstitute, int paramIdx) {
    PsiElement parent = expression.getParent();
    PsiElement element = expression;
    while (parent instanceof PsiParenthesizedExpression
        || parent instanceof PsiConditionalExpression) {
      if (parent instanceof PsiConditionalExpression
          && ((PsiConditionalExpression) parent).getThenExpression() != element
          && ((PsiConditionalExpression) parent).getElseExpression() != element) break;
      element = parent;
      parent = parent.getParent();
    }
    if (parent instanceof PsiArrayInitializerExpression) {
      final PsiType psiType = ((PsiArrayInitializerExpression) parent).getType();
      if (psiType instanceof PsiArrayType) {
        return ((PsiArrayType) psiType).getComponentType();
      }
    } else if (parent instanceof PsiTypeCastExpression) {
      final PsiType castType = ((PsiTypeCastExpression) parent).getType();
      if (castType instanceof PsiIntersectionType) {
        for (PsiType conjunctType : ((PsiIntersectionType) castType).getConjuncts()) {
          if (getFunctionalInterfaceMethod(conjunctType) != null) return conjunctType;
        }
      }
      return castType;
    } else if (parent instanceof PsiVariable) {
      return ((PsiVariable) parent).getType();
    } else if (parent instanceof PsiAssignmentExpression
        && expression instanceof PsiExpression
        && !PsiUtil.isOnAssignmentLeftHand((PsiExpression) expression)) {
      final PsiExpression lExpression = ((PsiAssignmentExpression) parent).getLExpression();
      return lExpression.getType();
    } else if (parent instanceof PsiExpressionList) {
      final PsiExpressionList expressionList = (PsiExpressionList) parent;
      final int lambdaIdx = getLambdaIdx(expressionList, expression);
      if (lambdaIdx > -1) {

        PsiType cachedType = null;
        final Pair<PsiMethod, PsiSubstitutor> method = MethodCandidateInfo.getCurrentMethod(parent);
        if (method != null) {
          final PsiParameter[] parameters = method.first.getParameterList().getParameters();
          cachedType =
              lambdaIdx < parameters.length
                  ? method.second.substitute(
                      getNormalizedType(
                          parameters[adjustLambdaIdx(lambdaIdx, method.first, parameters)]))
                  : null;
          if (!tryToSubstitute) return cachedType;
        }

        PsiElement gParent = expressionList.getParent();

        if (gParent instanceof PsiAnonymousClass) {
          gParent = gParent.getParent();
        }

        if (gParent instanceof PsiCall) {
          final PsiCall contextCall = (PsiCall) gParent;
          final JavaResolveResult resolveResult = contextCall.resolveMethodGenerics();
          final PsiElement resolve = resolveResult.getElement();
          if (resolve instanceof PsiMethod) {
            final PsiParameter[] parameters =
                ((PsiMethod) resolve).getParameterList().getParameters();
            final int finalLambdaIdx = adjustLambdaIdx(lambdaIdx, (PsiMethod) resolve, parameters);
            if (finalLambdaIdx < parameters.length) {
              if (!tryToSubstitute) return getNormalizedType(parameters[finalLambdaIdx]);
              if (cachedType != null && paramIdx > -1) {
                final PsiMethod interfaceMethod = getFunctionalInterfaceMethod(cachedType);
                if (interfaceMethod != null) {
                  final PsiClassType.ClassResolveResult cachedResult =
                      PsiUtil.resolveGenericsClassInType(cachedType);
                  final PsiType interfaceMethodParameterType =
                      interfaceMethod.getParameterList().getParameters()[paramIdx].getType();
                  if (!dependsOnTypeParams(
                      cachedResult.getSubstitutor().substitute(interfaceMethodParameterType),
                      cachedType,
                      expression)) {
                    return cachedType;
                  }
                }
              }
              return PsiResolveHelper.ourGuard.doPreventingRecursion(
                  expression,
                  true,
                  new Computable<PsiType>() {
                    @Override
                    public PsiType compute() {
                      return resolveResult
                          .getSubstitutor()
                          .substitute(getNormalizedType(parameters[finalLambdaIdx]));
                    }
                  });
            }
          }
          return null;
        }
      }
    } else if (parent instanceof PsiReturnStatement) {
      final PsiLambdaExpression gParent =
          PsiTreeUtil.getParentOfType(parent, PsiLambdaExpression.class);
      if (gParent != null) {
        return getFunctionalInterfaceTypeByContainingLambda(gParent);
      } else {
        final PsiMethod method = PsiTreeUtil.getParentOfType(parent, PsiMethod.class);
        if (method != null) {
          return method.getReturnType();
        }
      }
    } else if (parent instanceof PsiLambdaExpression) {
      return getFunctionalInterfaceTypeByContainingLambda((PsiLambdaExpression) parent);
    }
    return null;
  }