[ONOS-2112]Create an application used to manage virtual network subnet and
virtualPort resource. Change the same of onos app as vtnrsc meaning that
the virtual resource.

Change-Id: Ia6057acdb39a6f51c1e67c0b143df8320dbcb224
diff --git a/apps/vtnrsc/src/main/java/org/onosproject/app/vtnrsc/PhysicalNetwork.java b/apps/vtnrsc/src/main/java/org/onosproject/app/vtnrsc/PhysicalNetwork.java
new file mode 100644
index 0000000..5b0e0f2
--- /dev/null
+++ b/apps/vtnrsc/src/main/java/org/onosproject/app/vtnrsc/PhysicalNetwork.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2015 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.app.vtnrsc;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Immutable representation of a physicalnetwork identity.
+ */
+public final class PhysicalNetwork {
+
+    private final String physicalnetwork;
+
+    // Public construction is prohibited
+    private PhysicalNetwork(String physicalnetwork) {
+        checkNotNull(physicalnetwork, "Physicalnetwork cannot be null");
+        this.physicalnetwork = physicalnetwork;
+    }
+
+    /**
+     * Creates a network id using the physicalnetwork.
+     *
+     * @param physicalnetwork network String
+     * @return physicalnetwork
+     */
+    public static PhysicalNetwork physicalNetwork(String physicalnetwork) {
+        return new PhysicalNetwork(physicalnetwork);
+    }
+
+    /**
+     *
+     * @return physicalnetwork
+     */
+    public String physicalnetwork() {
+        return physicalnetwork;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(physicalnetwork);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof PhysicalNetwork) {
+            final PhysicalNetwork that = (PhysicalNetwork) obj;
+            return this.getClass() == that.getClass()
+                    && Objects.equals(this.physicalnetwork,
+                                      that.physicalnetwork);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return physicalnetwork;
+    }
+
+}