Ejemplo n.º 1
0
        private static void MethodDeclarationAnalyzer(SyntaxNodeAnalysisContext context)
        {
            var method        = (MethodDeclarationSyntax)context.Node;
            var allAttributes = method.AttributeLists;
            var checkedTypes  = new List <ITypeSymbol>();

            foreach (var attrib in allAttributes)
            {
                var info = RedundantAnalyzer.GetAttributeParameterType(context, attrib);
                if (info == null)
                {
                    continue;
                }

                bool exists = false;
                foreach (var addedAttrib in checkedTypes)
                {
                    if (addedAttrib.Name.Equals(info.Name))
                    {
                        exists = true;
                        break;
                    }
                }

                if (!exists)
                {
                    checkedTypes.Add(info);
                    continue;
                }

                Diagnostic diagnostic = Diagnostic.Create(Rule, attrib.GetLocation(), info.Name);
                context.ReportDiagnostic(diagnostic);
            }
        }
Ejemplo n.º 2
0
        private static void CheckExceptionHandling(AttributeInfo throwExceptionAttrib, SyntaxNodeAnalysisContext context)
        {
            if (!throwExceptionAttrib.AttributeData.ConstructorArguments.Any())
            {
                return;
            }

            var attributeArgument = throwExceptionAttrib.AttributeData.ConstructorArguments.First().Value.ToString();

            MethodDeclarationSyntax callerMethod = context.Node.Parent.FirstAncestorOrSelf <MethodDeclarationSyntax>();
            ClassDeclarationSyntax  callerClass  = context.Node.Parent.FirstAncestorOrSelf <ClassDeclarationSyntax>();

            if (callerMethod == null || callerClass == null)
            {
                return;
            }

            var callerClassAndMethodsAttributes = callerMethod.AttributeLists
                                                  .Union(callerClass.AttributeLists)
                                                  .ToList();

            var detectedAttributes = from attributeList in callerClassAndMethodsAttributes
                                     let info = RedundantAnalyzer.GetAttributeParameterType(context, attributeList)
                                                where info != null && info.ToString().Equals(attributeArgument)
                                                select attributeList;

            if (detectedAttributes.Any())
            {
                return;
            }

            // Checking try catch block
            foreach (var g in context.Node.Parent.AncestorsAndSelf().OfType <TryStatementSyntax>())
            {
                foreach (var f in g.Catches)
                {
                    if (f.Declaration == null)
                    {
                        return;
                    }

                    foreach (var k in f.Declaration.DescendantNodes().OfType <IdentifierNameSyntax>())
                    {
                        var typeInfo = context.SemanticModel.GetTypeInfo(k);
                        if (typeInfo.Type == null)
                        {
                            continue;
                        }

                        if (typeInfo.Type.ToString().Equals(typeof(Exception).FullName) ||
                            typeInfo.Type.ToString().Equals(attributeArgument))
                        {
                            return;
                        }
                    }
                }
            }
            ////////////////////////////////////////////////////////

            Rule = new DiagnosticDescriptor(DiagnosticId, Title, FormattedMessage, Category,
                                            (Microsoft.CodeAnalysis.DiagnosticSeverity)throwExceptionAttrib.Severity, isEnabledByDefault: true, description: Description);
            Diagnostic diagnostic = Diagnostic.Create(Rule, context.Node.GetLocation(), attributeArgument);

            context.ReportDiagnostic(diagnostic);
        }