[ONOS-2606] Bgp local rib interface.

Change-Id: I1e501051e767f627367853c62ef90a0be15ffdb1

+/*
+ * 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.bgp.controller;
+
+import org.onosproject.bgpio.protocol.BGPLSNlri;
+import org.onosproject.bgpio.protocol.linkstate.PathAttrNlriDetails;
+import org.onosproject.bgpio.types.RouteDistinguisher;
+
+/**
+ * Abstraction of BGP local RIB.
+ */
+public interface BgpLocalRib {
+
+    /**
+     * Add NLRI to local RIB.
+     *
+     * @param sessionInfo session info
+     * @param nlri network layer reach info
+     * @param details nlri details
+     */
+    void add(BgpSessionInfo sessionInfo, BGPLSNlri nlri, PathAttrNlriDetails details);
+
+    /**
+     * Removes NLRI identifier if it exists.
+     *
+     * @param nlri info
+     */
+    void delete(BGPLSNlri nlri);
+
+    /**
+     * Update NLRI identifier mapped with route distinguisher if it exists in tree otherwise add NLRI infomation mapped
+     * to respective route distinguisher.
+     *
+     * @param sessionInfo BGP session info
+     * @param nlri info
+     * @param details has pathattribute, protocol id and identifier
+     * @param routeDistinguisher unique for each VPN
+     */
+    void add(BgpSessionInfo sessionInfo, BGPLSNlri nlri, PathAttrNlriDetails details,
+                    RouteDistinguisher routeDistinguisher);
+
+    /**
+     * Removes VPN NLRI identifier mapped to route distinguisher if it exists.
+     *
+     * @param nlri info
+     * @param routeDistinguisher unique for each VPN
+     */
+    void delete(BGPLSNlri nlri, RouteDistinguisher routeDistinguisher);
+}