| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * 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.routeservice.store; |
| |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onosproject.routeservice.Route; |
| import org.onosproject.routeservice.RouteSet; |
| import org.onosproject.routeservice.RouteTableId; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| /** |
| * Route table that contains no routes. |
| */ |
| public final class EmptyRouteTable implements RouteTable { |
| |
| private final RouteTableId id = new RouteTableId("empty"); |
| |
| private static final EmptyRouteTable INSTANCE = new EmptyRouteTable(); |
| |
| /** |
| * Returns the instance of the empty route table. |
| * |
| * @return empty route table |
| */ |
| public static EmptyRouteTable instance() { |
| return INSTANCE; |
| } |
| |
| private EmptyRouteTable() { |
| } |
| |
| @Override |
| public void update(Route route) { |
| |
| } |
| |
| @Override |
| public void remove(Route route) { |
| |
| } |
| |
| @Override |
| public void replace(Route route) { |
| |
| } |
| |
| @Override |
| public RouteTableId id() { |
| return id; |
| } |
| |
| @Override |
| public Collection<RouteSet> getRoutes() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public RouteSet getRoutes(IpPrefix prefix) { |
| return null; |
| } |
| |
| @Override |
| public Collection<Route> getRoutesForNextHop(IpAddress nextHop) { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public void shutdown() { |
| |
| } |
| |
| @Override |
| public void destroy() { |
| |
| } |
| } |