| /** |
| * 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.atlas.repository.graphdb; |
| |
| /** |
| * Represent an edge in the graph |
| * |
| * @param <V> vertex class used by the graph |
| * @param <E> edge class used by the graph |
| */ |
| public interface AtlasEdge<V,E> extends AtlasElement { |
| |
| /** |
| * Gets the incoming vertex for this edge |
| * @param in |
| * @return |
| */ |
| AtlasVertex<V,E> getInVertex(); |
| |
| /** |
| * Gets the outgoing vertex for this edge |
| * |
| * @param in |
| * @return |
| */ |
| AtlasVertex<V,E> getOutVertex(); |
| |
| /** |
| * Gets the label associated with this edge. |
| * |
| * @return |
| */ |
| String getLabel(); |
| |
| /** |
| * Converts the edge to an instance of the underlying implementation class. This |
| * is syntactic sugar that allows the graph database implementation code to be strongly typed. This |
| * should not be called in other places. |
| * |
| * @return |
| */ |
| public E getE(); |
| |
| } |