Application manages the IP layer topology information - Interfaces

Change-Id: Ie1dea035674ee98583e98a82cca7e33ab0858b92
diff --git a/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/AreaId.java b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/AreaId.java
new file mode 100644
index 0000000..79a326d
--- /dev/null
+++ b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/AreaId.java
@@ -0,0 +1,70 @@
+/*

+ * 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.iptopology.api;

+

+import static com.google.common.base.MoreObjects.toStringHelper;

+

+import java.util.Objects;

+

+/**

+ * Area identifier class (32 Bit Area-ID).

+ */

+public class AreaId {

+    private final int areaId;

+

+    /**

+     * Constructor to set area identifier.

+     *

+     * @param areaId area id

+     */

+    public AreaId(int areaId) {

+        this.areaId = areaId;

+    }

+

+    /**

+     * obtain area identifier.

+     *

+     * @return area identifier

+     */

+    public int areaId() {

+        return areaId;

+    }

+

+    @Override

+    public int hashCode() {

+        return Objects.hash(areaId);

+    }

+

+    @Override

+    public boolean equals(Object obj) {

+        if (this == obj) {

+            return true;

+        }

+

+        if (obj instanceof AreaId) {

+            AreaId other = (AreaId) obj;

+            return Objects.equals(areaId, other.areaId);

+        }

+        return false;

+    }

+

+    @Override

+    public String toString() {

+        return toStringHelper(this)

+                .add("areaId", areaId)

+                .toString();

+    }

+}
\ No newline at end of file