From: Alexandre Terrasa <alexandre@moz-code.org>
Date: Mon, 4 Jul 2016 23:22:45 +0000 (-0400)
Subject: metrics: add metric about abstract class inheritance
X-Git-Url: http://nitlanguage.org

metrics: add metric about abstract class inheritance

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
---

diff --git a/src/metrics/inheritance_metrics.nit b/src/metrics/inheritance_metrics.nit
index b00a40b..a9a4a6d 100644
--- a/src/metrics/inheritance_metrics.nit
+++ b/src/metrics/inheritance_metrics.nit
@@ -355,6 +355,29 @@ class CNODC
 	end
 end
 
+# MClass metric: Number of Abstract Class Ancestors
+#
+# Count only absrtract classes
+class CNOAA
+	super MClassMetric
+	super IntMetric
+	redef fun name do return "cnoaa"
+	redef fun desc do return "number of abstract class ancestors"
+
+	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 == abstract_kind then
+					count += 1
+				end
+			end
+			values[mclass] = count
+		end
+	end
+end
+
 # MClass metric: Number of Interface Ancestors
 #
 # Count only interfaces