protected static void RunSelectionFilters(
ControllerContext controllerContext,
List <MethodInfo> methodInfos
)
{
// Filter depending on the selection attribute.
// Methods with valid selection attributes override all others.
// Methods with one or more invalid selection attributes are removed.
bool hasValidSelectionAttributes = false;
// loop backwards for fastest removal
for (int i = methodInfos.Count - 1; i >= 0; i--)
{
MethodInfo methodInfo = methodInfos[i];
ReadOnlyCollection <ActionMethodSelectorAttribute> attrs =
ReflectedAttributeCache.GetActionMethodSelectorAttributesCollection(methodInfo);
if (attrs.Count == 0)
{
// case 1: this method does not have a MethodSelectionAttribute
if (hasValidSelectionAttributes)
{
// if there is already method with a valid selection attribute, remove method without one
methodInfos.RemoveAt(i);
}
}
else if (IsValidMethodSelector(attrs, controllerContext, methodInfo))
{
// case 2: this method has MethodSelectionAttributes that are all valid
// if a matching action method had a selection attribute, consider it more specific than a matching action method
// without a selection attribute
if (!hasValidSelectionAttributes)
{
// when the first selection attribute is discovered, remove any items later in the list without selection attributes
if (i + 1 < methodInfos.Count)
{
methodInfos.RemoveFrom(i + 1);
}
hasValidSelectionAttributes = true;
}
}
else
{
// case 3: this method has a method selection attribute but it is not valid
// remove the method since it is opting out of this request
methodInfos.RemoveAt(i);
}
}
}
