internal static FieldReference CreateLoggerStaticField(TypeReferenceProvider typeReferenceProvider,
MethodReferenceProvider methodReferenceProvider,
TypeDefinition typeDefinition)
{
var logTypeRef = typeReferenceProvider.LogAdapterReference;
var logManagerTypeRef = typeReferenceProvider.LogManagerReference;
//look for existing one
var loggerField = typeDefinition.Fields.FirstOrDefault(fld => fld.IsStatic &&
fld.FieldType.FullName.Equals(logTypeRef.FullName));
if (loggerField != null)
{
return(loggerField.FixFieldReferenceIfDeclaringTypeIsGeneric());
}
//$log should be unique
loggerField = new FieldDefinition("$log", FieldAttributes.Private | FieldAttributes.Static, logTypeRef);
typeDefinition.Fields.Add(loggerField);
//create field init
var staticConstructor = typeDefinition.GetStaticConstructor();
if (staticConstructor == null)
{
const MethodAttributes methodAttributes = MethodAttributes.Private | MethodAttributes.Static | MethodAttributes.HideBySig | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName;
staticConstructor = new MethodDefinition(".cctor", methodAttributes, typeReferenceProvider.Void);
typeDefinition.Methods.Add(staticConstructor);
staticConstructor.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
}
var getLoggerMethod = new MethodReference("GetLogger", logTypeRef, logManagerTypeRef);
getLoggerMethod.Parameters.Add(new ParameterDefinition(typeReferenceProvider.Type));
//build up typeInfo
var getTypeFromHandleMethod = methodReferenceProvider.GetGetTypeFromHandleReference();
//spec treatment for generic types
var loggerFieldRef = loggerField.FixFieldReferenceIfDeclaringTypeIsGeneric();
//if generated nested type use the declaring type as logger type as it is more natural from
//end users perspective
var hasCompilerGeneratedAttribute = typeDefinition.HasCustomAttributes && typeDefinition.CustomAttributes
.Any(attr => attr.AttributeType.FullName.Equals(typeof(CompilerGeneratedAttribute).FullName, StringComparison.Ordinal));
var loggerTypeDefinition = hasCompilerGeneratedAttribute && typeDefinition.IsNested
? typeDefinition.DeclaringType : typeDefinition;
staticConstructor.Body.InsertAtTheBeginning(new[]
{
Instruction.Create(OpCodes.Ldtoken, loggerTypeDefinition.GetGenericInstantiationIfGeneric()),
Instruction.Create(OpCodes.Call, getTypeFromHandleMethod),
Instruction.Create(OpCodes.Call, getLoggerMethod),
Instruction.Create(OpCodes.Stsfld, loggerFieldRef)
});
return(loggerFieldRef);
}
