public IEnumerable <AspectInstance> ProvideAspects(object targetElement)
{
var parameter = targetElement as ParameterInfo;
if (parameter != null)
{
// When the attribute is applied on a parameter, we have to apply the filter when the method is invoked.
var method = (MethodBase)parameter.Member;
// Add an aspect to the method. Make sure we have a single aspect instance even if many parameters need filtering.
var filterMethodArgumentsAspect = GetAspect <FilterMethodArgumentsAspect>(method);
if (filterMethodArgumentsAspect == null)
{
filterMethodArgumentsAspect = new FilterMethodArgumentsAspect(method);
yield return(new AspectInstance(method, filterMethodArgumentsAspect));
}
filterMethodArgumentsAspect.SetFilter(parameter, this);
}
else
{
// When the attribute is applied on a field or property, we will apply the filter when asked implicitly.
var locationInfo = LocationInfo.ToLocationInfo(targetElement);
if (locationInfo.IsStatic)
{
Message.Write(locationInfo, SeverityType.Error, "MY02", "Cannot apply [{0}] to {1} because it is static.",
GetType().Name, locationInfo);
yield break;
}
var type = locationInfo.DeclaringType;
if (type.IsValueType)
{
Message.Write(locationInfo, SeverityType.Error, "MY03",
"Cannot apply [{0}] to {1} because the declaring type is a struct.", GetType().Name, locationInfo);
yield break;
}
var filterTypePropertiesAspect = GetAspect <FilterTypePropertiesAspect>(type);
if (filterTypePropertiesAspect == null)
{
filterTypePropertiesAspect = new FilterTypePropertiesAspect();
yield return(new AspectInstance(type, filterTypePropertiesAspect));
}
filterTypePropertiesAspect.SetFilter(locationInfo, this);
}
}
public IEnumerable <AspectInstance> ProvideAspects(object targetElement)
{
var parameter = targetElement as ParameterInfo;
if (parameter != null)
{
var method = (MethodBase)parameter.Member;
var filterMethodArgumentsAspect = GetAspect <FilterMethodArgumentsAspect>(method);
if (filterMethodArgumentsAspect == null)
{
filterMethodArgumentsAspect = new FilterMethodArgumentsAspect(method);
yield return(new AspectInstance(method, filterMethodArgumentsAspect));
}
filterMethodArgumentsAspect.SetFilter(parameter, this);
}
else
{
var locationInfo = LocationInfo.ToLocationInfo(targetElement);
if (locationInfo.IsStatic)
{
Message.Write(locationInfo, SeverityType.Error, "MY02", "Cannot apply [{0}] to {1} because it is static.",
GetType().Name, locationInfo);
yield break;
}
var type = locationInfo.DeclaringType;
if (type.IsValueType)
{
Message.Write(locationInfo, SeverityType.Error, "MY03",
"Cannot apply [{0}] to {1} because the declaring type is a struct.", GetType().Name, locationInfo);
yield break;
}
var filterTypePropertiesAspect = GetAspect <FilterTypePropertiesAspect>(type);
if (filterTypePropertiesAspect == null)
{
filterTypePropertiesAspect = new FilterTypePropertiesAspect();
yield return(new AspectInstance(type, filterTypePropertiesAspect));
}
filterTypePropertiesAspect.SetFilter(locationInfo, this);
}
}
