| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.nemo.common.dag; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.node.JsonNodeFactory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Connects two vertices of a DAG. |
| * This class can be extended for various DAG representations. |
| * |
| * @param <V> the vertex type. |
| */ |
| public class Edge<V extends Vertex> implements Serializable { |
| private static final Logger LOG = LoggerFactory.getLogger(Edge.class.getName()); |
| |
| private final String id; |
| private final V src; |
| private final V dst; |
| |
| /** |
| * Constructor for Edge. |
| * |
| * @param id ID of the edge. |
| * @param src source vertex. |
| * @param dst destination vertex. |
| */ |
| public Edge(final String id, final V src, final V dst) { |
| this.id = id; |
| this.src = src; |
| this.dst = dst; |
| } |
| |
| /** |
| * @return the ID of the edge. |
| */ |
| public final String getId() { |
| return id; |
| } |
| |
| /** |
| * @return the numeric ID of the edge. (for edge id "edge-2", this method returns 2) |
| */ |
| public final Integer getNumericId() { |
| return Integer.parseInt(id.replaceAll("[^\\d.]", "")); |
| } |
| |
| /** |
| * @return source vertex. |
| */ |
| public final V getSrc() { |
| return src; |
| } |
| |
| /** |
| * @return destination vertex. |
| */ |
| public final V getDst() { |
| return dst; |
| } |
| |
| /** |
| * @return JSON representation of additional properties |
| */ |
| @SuppressWarnings("checkstyle:designforextension") |
| public JsonNode getPropertiesAsJsonNode() { |
| return JsonNodeFactory.instance.objectNode(); |
| } |
| } |