| /* |
| * Copyright 2014 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.net; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.collect.ImmutableList; |
| import org.onosproject.net.provider.ProviderId; |
| |
| import java.util.List; |
| import java.util.Objects; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * Default implementation of a network path. |
| */ |
| public class DefaultPath extends DefaultLink implements Path { |
| |
| private final List<Link> links; |
| private final double cost; |
| |
| /** |
| * Creates a path from the specified source and destination using the |
| * supplied list of links. |
| * |
| * @param providerId provider identity |
| * @param links contiguous links that comprise the path |
| * @param cost unit-less path cost |
| * @param annotations optional key/value annotations |
| */ |
| public DefaultPath(ProviderId providerId, List<Link> links, double cost, |
| Annotations... annotations) { |
| super(providerId, source(links), destination(links), Type.INDIRECT, annotations); |
| this.links = ImmutableList.copyOf(links); |
| this.cost = cost; |
| } |
| |
| @Override |
| public List<Link> links() { |
| return links; |
| } |
| |
| @Override |
| public double cost() { |
| return cost; |
| } |
| |
| // Returns the source of the first link. |
| private static ConnectPoint source(List<Link> links) { |
| checkNotNull(links, "List of path links cannot be null"); |
| checkArgument(!links.isEmpty(), "List of path links cannot be empty"); |
| return links.get(0).src(); |
| } |
| |
| // Returns the destination of the last link. |
| private static ConnectPoint destination(List<Link> links) { |
| checkNotNull(links, "List of path links cannot be null"); |
| checkArgument(!links.isEmpty(), "List of path links cannot be empty"); |
| return links.get(links.size() - 1).dst(); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(this) |
| .add("src", src()) |
| .add("dst", dst()) |
| .add("type", type()) |
| .add("state", state()) |
| .add("durable", isDurable()) |
| .add("links", links) |
| .add("cost", cost) |
| .toString(); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(links); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof DefaultPath) { |
| final DefaultPath other = (DefaultPath) obj; |
| return Objects.equals(this.links, other.links); |
| } |
| return false; |
| } |
| } |