| /* |
| * Copyright 2014-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.onlab.graph; |
| |
| |
| import java.util.Set; |
| |
| /** |
| * Abstraction of a directed graph structure. |
| * |
| * @param <V> vertex type |
| * @param <E> edge type |
| */ |
| public interface Graph<V extends Vertex, E extends Edge> { |
| |
| /** |
| * Returns the set of vertexes comprising the graph. |
| * |
| * @return set of vertexes |
| */ |
| Set<V> getVertexes(); |
| |
| /** |
| * Returns the set of edges comprising the graph. |
| * |
| * @return set of edges |
| */ |
| Set<E> getEdges(); |
| |
| /** |
| * Returns all edges leading out from the specified source vertex. |
| * |
| * @param src source vertex |
| * @return set of egress edges; empty if no such edges |
| */ |
| Set<E> getEdgesFrom(V src); |
| |
| /** |
| * Returns all edges leading towards the specified destination vertex. |
| * |
| * @param dst destination vertex |
| * @return set of ingress vertexes; empty if no such edges |
| */ |
| Set<E> getEdgesTo(V dst); |
| |
| } |