New class link to handle links between components and possible errors

models/links.go

@@ -14,17 +14,38 @@ type Link struct {
 // Use ResourceObject parameter to process certain components type differently
 // and Id's to identify each component as a node in an oriented graph
 
-func NewLink(src ResourceObject, srcId string, dst ResourceObject, dstId string) (link Link) {
+// In the case of DCLink we choose to always consider the DC as the destination
+// in order to facilitate some logic
 
+func NewLink(src ResourceObject, srcId string, dst ResourceObject, dstId string) (link Link) {
 	link.Source = srcId
 	link.Destination = dstId
 
+	// If the link is between a DC and a component make sure that the DC is destination
+	// and if the component is computing, update the DataCenterID
+
 	if (src.getRtype() == rtype.DATACENTER || dst.getRtype() == rtype.DATACENTER){
+		var linked ResourceObject
+
 		link.DCLink = true
 
+		if src.getRtype() == rtype.DATACENTER {
+			linked = dst
+		} else {
+			linked = src
+		}
 		
+		if( link.DCLink && src.getRtype() == rtype.DATACENTER){
+			link.Destination = srcId
+			link.Source = dstId
+		} 
+		
+		if (linked.getRtype() == rtype.COMPUTING){
+			linked.(*ComputingObject).DataCenterID = link.Destination
+		}
 	}
-	
+
+
 	return
 }