| /** |
| * 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; |
| |
| /** |
| * A query against a particular vertex. |
| * |
| * @param <V> vertex class used by the graph |
| * @param <E> edge class used by the graph |
| */ |
| public interface AtlasVertexQuery<V, E> { |
| |
| /** |
| * Specifies the edge direction that should be query. |
| * |
| * @param queryDirection |
| * @return |
| */ |
| AtlasVertexQuery<V, E> direction(AtlasEdgeDirection queryDirection); |
| |
| /** |
| * Returns the vertices that satisfy the query condition. |
| * |
| * @return |
| */ |
| Iterable<AtlasVertex<V, E>> vertices(); |
| |
| /** |
| * Returns the incident edges that satisfy the query condition. |
| * @return |
| */ |
| Iterable<AtlasEdge<V, E>> edges(); |
| |
| /** |
| * Returns the number of elements that match the query. |
| * @return |
| */ |
| long count(); |
| |
| } |