[ONOS-5607] Add LISP router, controller and listener interfaces

Change-Id: If01738d1b0e4e264618392844d96a9cf31cbd7c7
diff --git a/protocols/lisp/api/src/main/java/org/onosproject/lisp/ctl/LispRouterId.java b/protocols/lisp/api/src/main/java/org/onosproject/lisp/ctl/LispRouterId.java
new file mode 100644
index 0000000..d6b3c9c
--- /dev/null
+++ b/protocols/lisp/api/src/main/java/org/onosproject/lisp/ctl/LispRouterId.java
@@ -0,0 +1,94 @@
+/*
+ * 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.ctl;
+
+import org.onlab.packet.IpAddress;
+import org.onlab.util.Identifier;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+/**
+ * The class representing a network router identifier.
+ * This class is immutable.
+ */
+public final class LispRouterId extends Identifier<IpAddress> {
+
+    private static final String SCHEME = "lisp";
+    private static final IpAddress UNKNOWN = IpAddress.valueOf("0.0.0.0");
+
+    /**
+     * A default constructor.
+     */
+    public LispRouterId() {
+        super(UNKNOWN);
+    }
+
+    /**
+     * A constructor with an IpAddress value specified.
+     *
+     * @param value the value to use
+     */
+    public LispRouterId(IpAddress value) {
+        super(value);
+    }
+
+    /**
+     * A constructor with a String value specified.
+     *
+     * @param value the value to use
+     */
+    public LispRouterId(String value) {
+        super(IpAddress.valueOf(value));
+    }
+
+    /**
+     * Returns LispRouterId created from a given device URI.
+     *
+     * @param uri device URI
+     * @return object of LispRouterId
+     */
+    public static LispRouterId routerId(URI uri) {
+        checkArgument(uri.getScheme().equals(SCHEME), "Unsupported URI scheme");
+        return new LispRouterId(IpAddress.valueOf(uri.getSchemeSpecificPart()));
+    }
+
+    /**
+     * Produces a device URI from the given LispRouterId.
+     *
+     * @param routerId device identifier
+     * @return device URI
+     */
+    public static URI uri(LispRouterId routerId) {
+        return uri(routerId.id());
+    }
+
+    /**
+     * Produces device URI from the given device IpAddress.
+     *
+     * @param ipAddress device ip address
+     * @return device URI
+     */
+    public static URI uri(IpAddress ipAddress) {
+        try {
+            return new URI(SCHEME, ipAddress.toString(), null);
+        } catch (URISyntaxException e) {
+            return null;
+        }
+    }
+}