Andrey Komarov | 2398d96 | 2016-09-26 15:11:23 +0300 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Andrey Komarov | 2398d96 | 2016-09-26 15:11:23 +0300 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.net.topology; |
| 18 | |
| 19 | import org.onlab.graph.DefaultEdgeWeigher; |
| 20 | import org.onlab.graph.ScalarWeight; |
| 21 | import org.onlab.graph.Weight; |
| 22 | |
| 23 | /** |
| 24 | * Wrapper which transforms double-based link weigher to {@link Weight}-based |
| 25 | * link weigher. |
| 26 | */ |
| 27 | public final class AdapterLinkWeigher |
| 28 | extends DefaultEdgeWeigher<TopologyVertex, TopologyEdge> |
| 29 | implements LinkWeigher { |
| 30 | |
| 31 | private final LinkWeight doubleWeigher; |
| 32 | |
| 33 | private AdapterLinkWeigher(LinkWeight doubleWeigher) { |
| 34 | this.doubleWeigher = doubleWeigher; |
| 35 | } |
| 36 | |
| 37 | @Override |
| 38 | public Weight weight(TopologyEdge edge) { |
| 39 | return new ScalarWeight(doubleWeigher.weight(edge)); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Transforms double-based link weigher to {@link Weight}-based weigher. |
| 44 | * |
| 45 | * @param lw double-based weigher |
| 46 | * @return {@link Weight}-based weigher |
| 47 | */ |
| 48 | public static LinkWeigher adapt(LinkWeight lw) { |
| 49 | return lw == null ? null : new AdapterLinkWeigher(lw); |
| 50 | } |
| 51 | } |