| /* |
| 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.edgent.graph; |
| |
| import java.util.Set; |
| |
| /** |
| * Represents an edge between two Vertices. |
| */ |
| public interface Edge { |
| |
| /** |
| * Returns the source vertex. |
| * @return the source vertex. |
| */ |
| Vertex<?, ?, ?> getSource(); |
| |
| /** |
| * Returns the source output port index. |
| * @return the source output port index. |
| */ |
| int getSourceOutputPort(); |
| |
| /** |
| * Returns the target vertex. |
| * @return the target vertex. |
| */ |
| Vertex<?, ?, ?> getTarget(); |
| |
| /** |
| * Returns the target input port index. |
| * @return the target input port index. |
| */ |
| int getTargetInputPort(); |
| |
| /** |
| * Returns the set of tags associated with this edge. |
| * |
| * @return set of tag values. |
| */ |
| Set<String> getTags(); |
| |
| /** |
| * Returns the alias associated with this edge. |
| * |
| * @return the alias. null if none. |
| */ |
| String getAlias(); |
| } |