| /** |
| * 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.titan1; |
| |
| import org.apache.atlas.repository.graphdb.AtlasCardinality; |
| import org.apache.atlas.repository.graphdb.AtlasGraphIndex; |
| import org.apache.atlas.repository.graphdb.titan1.query.Titan1GraphQuery; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| |
| import com.thinkaurelius.titan.core.Cardinality; |
| import com.thinkaurelius.titan.core.PropertyKey; |
| import com.thinkaurelius.titan.core.schema.TitanGraphIndex; |
| |
| |
| /** |
| * Factory that serves up instances of graph database abstraction layer classes |
| * that correspond to Titan/Tinkerpop3 classes. |
| */ |
| public final class GraphDbObjectFactory { |
| |
| private GraphDbObjectFactory() { |
| |
| } |
| |
| /** |
| * Creates a Titan1Edge that corresponds to the given Gremlin Edge. |
| * |
| * @param graph The graph the edge should be created in |
| * @param source The gremlin edge |
| */ |
| public static Titan1Edge createEdge(Titan1Graph graph, Edge source) { |
| |
| if (source == null) { |
| return null; |
| } |
| return new Titan1Edge(graph, source); |
| } |
| |
| /** |
| * Creates a Titan1GraphQuery that corresponds to the given GraphQuery. |
| * |
| * @param graph the graph that is being quried |
| */ |
| public static Titan1GraphQuery createQuery(Titan1Graph graph, boolean isChildQuery) { |
| |
| return new Titan1GraphQuery(graph, isChildQuery); |
| } |
| |
| /** |
| * Creates a Titan1Vertex that corresponds to the given Gremlin Vertex. |
| * |
| * @param graph The graph that contains the vertex |
| * @param source the Gremlin vertex |
| */ |
| public static Titan1Vertex createVertex(Titan1Graph graph, Vertex source) { |
| |
| if (source == null) { |
| return null; |
| } |
| return new Titan1Vertex(graph, source); |
| } |
| |
| /** |
| * @param propertyKey The Gremlin propertyKey. |
| * |
| */ |
| public static Titan1PropertyKey createPropertyKey(PropertyKey propertyKey) { |
| if (propertyKey == null) { |
| return null; |
| } |
| return new Titan1PropertyKey(propertyKey); |
| } |
| |
| /** |
| * @param index The gremlin index. |
| * @return |
| */ |
| public static AtlasGraphIndex createGraphIndex(TitanGraphIndex index) { |
| if (index == null) { |
| return null; |
| } |
| return new Titan1GraphIndex(index); |
| } |
| |
| /** |
| * Converts a Multiplicity to a Cardinality. |
| * |
| * @param cardinality |
| * @return |
| */ |
| public static AtlasCardinality createCardinality(Cardinality cardinality) { |
| |
| if (cardinality == Cardinality.SINGLE) { |
| return AtlasCardinality.SINGLE; |
| } else if (cardinality == Cardinality.LIST) { |
| return AtlasCardinality.LIST; |
| } |
| return AtlasCardinality.SET; |
| } |
| |
| } |