# MClass metric: Number of Interface Ancestors
#
# Count only interfaces
class CNOAI
	super MClassMetric
	super IntMetric
	redef fun name do return "cnoai"
	redef fun desc do return "number of interface_kind ancestor"

	redef fun collect(mclasses) do
		for mclass in mclasses do
			var count = 0
			for parent in mclass.in_hierarchy(mainmodule).greaters do
				if parent == mclass then continue
				if parent.kind == interface_kind then
					count += 1
				end
			end
			values[mclass] = count
		end
	end
end