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);
}
}
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);
}
