Extract method to create a FlowRule

Change-Id: Ib40b557a724e9c11ea9c6c30ab99b903ecb21823

@@ -241,27 +241,31 @@ public class OpticalCircuitIntentCompiler implements IntentCompiler<OpticalCircu
             intentService.submit(connIntent);
         }
 
+        // Save circuit to connectivity intent mapping
+        intentSetMultimap.allocateMapping(connIntent.id(), intent.id());
+
+        FlowRuleIntent circuitIntent = createFlowRule(intent, connIntent, slots);
+        return ImmutableList.of(circuitIntent);
+    }
+
+    private FlowRuleIntent createFlowRule(OpticalCircuitIntent higherIntent,
+                                          OpticalConnectivityIntent lowerIntent, Set<TributarySlot> slots) {
         // Create optical circuit intent
         List<FlowRule> rules = new LinkedList<>();
         // at the source: ODUCLT port mapping to OCH port
-        rules.add(connectPorts(src, connIntent.getSrc(), intent.priority(), slots));
+        rules.add(connectPorts(higherIntent.getSrc(), lowerIntent.getSrc(), higherIntent.priority(), slots));
         // at the destination: OCH port mapping to ODUCLT port
-        rules.add(connectPorts(connIntent.getDst(), dst, intent.priority(), slots));
+        rules.add(connectPorts(lowerIntent.getDst(), higherIntent.getDst(), higherIntent.priority(), slots));
 
         // Create flow rules for reverse path
-        if (intent.isBidirectional()) {
+        if (higherIntent.isBidirectional()) {
            // at the destination: OCH port mapping to ODUCLT port
-            rules.add(connectPorts(connIntent.getSrc(), src, intent.priority(), slots));
+            rules.add(connectPorts(lowerIntent.getSrc(), higherIntent.getSrc(), higherIntent.priority(), slots));
             // at the source: ODUCLT port mapping to OCH port
-            rules.add(connectPorts(dst, connIntent.getDst(), intent.priority(), slots));
+            rules.add(connectPorts(higherIntent.getDst(), lowerIntent.getDst(), higherIntent.priority(), slots));
         }
 
-        FlowRuleIntent circuitIntent = new FlowRuleIntent(appId, rules, intent.resources());
-
-        // Save circuit to connectivity intent mapping
-        intentSetMultimap.allocateMapping(connIntent.id(), intent.id());
-
-        return ImmutableList.of(circuitIntent);
+        return new FlowRuleIntent(appId, rules, higherIntent.resources());
     }
 
     /**