Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
tom | e348941 | 2014-08-29 02:30:38 -0700 | [diff] [blame] | 19 | package org.onlab.graph; |
| 20 | |
| 21 | import java.util.Map; |
| 22 | import java.util.Set; |
| 23 | |
| 24 | /** |
| 25 | * Representation of a graph path search algorithm. |
| 26 | * |
| 27 | * @param <V> vertex type |
| 28 | * @param <E> edge type |
| 29 | */ |
| 30 | public interface GraphPathSearch<V extends Vertex, E extends Edge<V>> { |
| 31 | |
| 32 | /** |
| 33 | * Abstraction of a path search result. |
| 34 | */ |
| 35 | public interface Result<V extends Vertex, E extends Edge<V>> { |
| 36 | |
| 37 | /** |
| 38 | * Returns the search source. |
| 39 | * |
| 40 | * @return search source |
| 41 | */ |
| 42 | public V src(); |
| 43 | |
| 44 | /** |
| 45 | * Returns the search destination, if was was given. |
| 46 | * |
| 47 | * @return optional search destination |
| 48 | */ |
| 49 | public V dst(); |
| 50 | |
| 51 | /** |
| 52 | * Returns the set of paths produced as a result of the graph search. |
| 53 | * |
| 54 | * @return set of paths |
| 55 | */ |
| 56 | Set<Path<V, E>> paths(); |
| 57 | |
| 58 | /** |
| 59 | * Returns bindings of each vertex to its parent edges in the path. |
| 60 | * |
| 61 | * @return map of vertex to its parent edge bindings |
| 62 | */ |
| 63 | public Map<V, Set<E>> parents(); |
| 64 | |
| 65 | /** |
| 66 | * Return a bindings of each vertex to its cost in the path. |
| 67 | * |
| 68 | * @return map of vertex to path cost bindings |
| 69 | */ |
| 70 | public Map<V, Double> costs(); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Searches the specified graph. |
| 75 | * |
| 76 | * @param graph graph to be searched |
| 77 | * @param src optional source vertex |
| 78 | * @param dst optional destination vertex; if null paths to all vertex |
| 79 | * destinations will be searched |
| 80 | * @param weight optional edge-weight; if null cost of each edge will be |
| 81 | * assumed to be 1.0 |
| 82 | * @return search results |
| 83 | */ |
| 84 | Result<V, E> search(Graph<V, E> graph, V src, V dst, EdgeWeight<V, E> weight); |
| 85 | |
| 86 | } |