Implement Oplink drivers for port adjacency

Change-Id: I3cdc402c4dac544a7cb48544352df758c416345d
diff --git a/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalAdjacencyLinkService.java b/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalAdjacencyLinkService.java
new file mode 100644
index 0000000..290bb12
--- /dev/null
+++ b/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalAdjacencyLinkService.java
@@ -0,0 +1,58 @@
+/*
+ * 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.drivers.optical;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.link.LinkDescription;
+
+/**
+ * Interface to allow for optical device drivers to add/remove links to
+ * the store. Acts as a proxy to LinkProviderService.
+ */
+@Beta
+public interface OpticalAdjacencyLinkService {
+    /**
+     * Signals that an infrastructure link has been detected.
+     *
+     * @param linkDescription link information
+     */
+    void linkDetected(LinkDescription linkDescription);
+
+    /**
+     * Signals that an infrastructure link has disappeared.
+     *
+     * @param linkDescription link information
+     */
+    void linkVanished(LinkDescription linkDescription);
+
+    /**
+     * Signals that infrastructure links associated with the specified
+     * connect point have vanished.
+     *
+     * @param connectPoint connect point
+     */
+    void linksVanished(ConnectPoint connectPoint);
+
+    /**
+     * Signals that infrastructure links associated with the specified
+     * device have vanished.
+     *
+     * @param deviceId device identifier
+     */
+    void linksVanished(DeviceId deviceId);
+}