| /** |
| * 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.AtlasEdgeDirection; |
| import org.apache.atlas.repository.graphdb.AtlasPropertyKey; |
| import org.apache.tinkerpop.gremlin.structure.Direction; |
| |
| import com.thinkaurelius.titan.core.Cardinality; |
| import com.thinkaurelius.titan.core.PropertyKey; |
| |
| |
| /** |
| * Factory that serves up instances of Titan/Tinkerpop classes that correspond to |
| * graph database abstraction layer/Atlas classes. |
| */ |
| public final class TitanObjectFactory { |
| |
| private TitanObjectFactory() { |
| |
| } |
| |
| /** |
| * Retrieves the titan direction corresponding to the given |
| * AtlasEdgeDirection. |
| * |
| * @param dir |
| * @return |
| */ |
| public static Direction createDirection(AtlasEdgeDirection dir) { |
| |
| switch(dir) { |
| case IN: |
| return Direction.IN; |
| case OUT: |
| return Direction.OUT; |
| case BOTH: |
| return Direction.BOTH; |
| default: |
| throw new RuntimeException("Unrecognized direction: " + dir); |
| } |
| } |
| |
| |
| /** |
| * Converts a Multiplicity to a Cardinality. |
| * |
| * @param multiplicity |
| * @return |
| */ |
| public static Cardinality createCardinality(AtlasCardinality cardinality) { |
| switch(cardinality) { |
| |
| case SINGLE: |
| return Cardinality.SINGLE; |
| case LIST: |
| return Cardinality.LIST; |
| case SET: |
| return Cardinality.SET; |
| default: |
| throw new IllegalStateException("Unrecognized cardinality: " + cardinality); |
| } |
| } |
| |
| public static PropertyKey createPropertyKey(AtlasPropertyKey key) { |
| return ((Titan1PropertyKey)key).getWrappedPropertyKey(); |
| } |
| |
| } |