Add ResourceType field for ResourceAllocation, and change visibility of some of methods

@@ -14,4 +14,9 @@ public class BandwidthResourceAllocation extends BandwidthResourceRequest
     public BandwidthResourceAllocation(Bandwidth bandwidth) {
         super(bandwidth);
     }
+
+    @Override
+    public ResourceType type() {
+        return ResourceType.BANDWIDTH;
+    }
 }

@@ -30,7 +30,7 @@ public class BandwidthResourceRequest implements ResourceRequest {
      *
      * @return the bandwidth resource
      */
-    Bandwidth bandwidth() {
+    public Bandwidth bandwidth() {
         return bandwidth;
     }
 }

@@ -7,6 +7,11 @@ public class LambdaResourceAllocation extends LambdaResourceRequest
         implements ResourceAllocation {
     private final Lambda lambda;
 
+    @Override
+    public ResourceType type() {
+        return ResourceType.LAMBDA;
+    }
+
     /**
      * Creates a new {@link LambdaResourceAllocation} with {@link Lambda}
      * object.
@@ -22,7 +27,7 @@ public class LambdaResourceAllocation extends LambdaResourceRequest
      *
      * @return the lambda resource
      */
-    Lambda lambda() {
+    public Lambda lambda() {
         return lambda;
     }
 }

@@ -4,5 +4,5 @@ package org.onlab.onos.net.resource;
  * Abstraction of allocated resource.
  */
 public interface ResourceAllocation extends ResourceRequest {
-
+    ResourceType type();
 }

+package org.onlab.onos.net.resource;
+
+public enum ResourceType {
+    LAMBDA,
+    BANDWIDTH,
+}