[ONOS-4718] Add several data types used for addressing LISP locator

Change-Id: If6263957b2ce1d9a6a07bbc12f4fb9c9e2fa7616
diff --git a/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAsAddress.java b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAsAddress.java
new file mode 100644
index 0000000..cb31108
--- /dev/null
+++ b/protocols/lisp/msg/src/main/java/org/onosproject/lisp/msg/types/LispAsAddress.java
@@ -0,0 +1,77 @@
+/*
+ * 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.lisp.msg.types;
+
+/**
+ * The identifier of Autonomous System (AS).
+ */
+public class LispAsAddress extends LispAfiAddress {
+
+    private final int asNum;
+
+    /**
+     * Initializes AS identifier number.
+     *
+     * @param num AS number
+     */
+    public LispAsAddress(int num) {
+        super(AddressFamilyIdentifierEnum.AS);
+        this.asNum = num;
+    }
+
+    /**
+     * Obtains AS identifier number.
+     *
+     * @return AS number
+     */
+    public int getASNum() {
+        return asNum;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = super.hashCode();
+        result = prime * result + asNum;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (!super.equals(obj)) {
+            return false;
+        }
+
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+
+        LispAsAddress other = (LispAsAddress) obj;
+        if (asNum != other.asNum) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(asNum);
+    }
+}