* Added initial support for add/get/delete Flow state to the Network MAP via the REST API
  NOTE: The "add" REST API can't be used as-is.
* Added initial support for reading the Flow state from the Network MAP by the Controller
  and sending it to the switches.
  Currently, the Controller reads periodically the Flow entries (every 3 seconds)
  NOTE: The writing of the OpenFlow state to the switches is not tested.

The Python scripts for to add/delete/get flows are intentionally omitted until
the "add" REST API issue is resolved.

NOTE: Two new keys have been added to the database: "flow_id" and "flow_entry_id".
This requires that the older database should be deleted, because Cassandra
doesn't allow adding new keys to an existing database.
diff --git a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
index c485d91..34d79c8 100644
--- a/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
+++ b/src/main/java/net/floodlightcontroller/flowcache/web/GetAllFlowsByEndpointsResource.java
@@ -19,7 +19,7 @@
 
     @Get("json")
     public ArrayList<FlowPath> retrieve() {
-	ArrayList<FlowPath> result = new ArrayList<FlowPath>();
+	ArrayList<FlowPath> result = null;
 
         IFlowService flowService =
                 (IFlowService)getContext().getAttributes().
@@ -48,7 +48,7 @@
 	DataPathEndpoints dataPathEndpoints =
 	    new DataPathEndpoints(srcSwitchPort, dstSwitchPort);
 
-	flowService.getAllFlows(dataPathEndpoints, result);
+	result = flowService.getAllFlows(dataPathEndpoints);
 
         return result;
     }