| /* |
| * Copyright 2015-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.net.topology; |
| |
| import org.onlab.graph.ScalarWeight; |
| import org.onlab.graph.Weight; |
| import org.onosproject.net.AnnotationKeys; |
| |
| /** |
| * Link weight for measuring link cost using the link metric annotation. |
| */ |
| public class MetricLinkWeight implements LinkWeigher { |
| |
| @Override |
| public Weight getInitialWeight() { |
| return ScalarWeight.toWeight(0.0); |
| } |
| |
| @Override |
| public Weight getNonViableWeight() { |
| return ScalarWeight.NON_VIABLE_WEIGHT; |
| } |
| |
| @Override |
| public Weight weight(TopologyEdge edge) { |
| String v = edge.link().annotations().value(AnnotationKeys.METRIC); |
| try { |
| return ScalarWeight.toWeight(v != null ? Double.parseDouble(v) : 1); |
| } catch (NumberFormatException e) { |
| return ScalarWeight.toWeight(1.0); |
| } |
| } |
| } |
| |