Add DiscreteResourceCodec for PortNumber

Change-Id: Iedda1a0ba46b3d044f127334a8abdb419dabcd9f
(cherry picked from commit cbd103df)

@@ -17,6 +17,7 @@ package org.onosproject.store.resource.impl;
 
 import org.onlab.packet.MplsLabel;
 import org.onlab.packet.VlanId;
+import org.onosproject.net.PortNumber;
 import org.onosproject.net.resource.DiscreteResource;
 import org.onosproject.net.resource.DiscreteResourceCodec;
 
@@ -46,6 +47,7 @@ final class Codecs {
     }
 
     private void init() {
+        codecs.put(PortNumber.class, new PortNumberCodec());
         codecs.put(VlanId.class, new VlanIdCodec());
         codecs.put(MplsLabel.class, new MplsLabelCodec());
     }

@@ -78,6 +78,7 @@ public class ConsistentResourceStore extends AbstractStore<ResourceEvent, Resour
             .register(EmptyDiscreteResources.class)
             .register(new EncodedResourcesSerializer(), EncodedDiscreteResources.class)
             .register(ContinuousResourceAllocation.class)
+            .register(PortNumberCodec.class)
             .register(VlanIdCodec.class)
             .register(MplsLabelCodec.class)
             .build());

+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.store.resource.impl;
+
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.resource.DiscreteResourceCodec;
+
+class PortNumberCodec implements DiscreteResourceCodec<PortNumber> {
+    @Override
+    public int encode(PortNumber resource) {
+        return (int) resource.toLong();
+    }
+
+    @Override
+    public PortNumber decode(int value) {
+        return PortNumber.portNumber(value);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        return PortNumber.class.hashCode();
+    }
+}