| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.catalog.projection; |
| |
| import com.tinkerpop.blueprints.Direction; |
| import com.tinkerpop.blueprints.Edge; |
| import com.tinkerpop.blueprints.Vertex; |
| import com.tinkerpop.pipes.Pipe; |
| import com.tinkerpop.pipes.PipeFunction; |
| import com.tinkerpop.pipes.filter.FilterFunctionPipe; |
| import org.apache.atlas.catalog.TermVertexWrapper; |
| import org.apache.atlas.catalog.VertexWrapper; |
| import org.apache.atlas.catalog.definition.EntityTagResourceDefinition; |
| import org.apache.atlas.catalog.definition.ResourceDefinition; |
| import org.apache.atlas.repository.Constants; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| /** |
| * Trait specific relation. |
| */ |
| //todo: combine with TagRelation |
| public class TraitRelation extends BaseRelation { |
| //todo: for now using entity tag resource definition |
| private static ResourceDefinition resourceDefinition = new EntityTagResourceDefinition(); |
| |
| @Override |
| public Collection<RelationSet> traverse(VertexWrapper vWrapper) { |
| Vertex v = vWrapper.getVertex(); |
| Collection<VertexWrapper> vertices = new ArrayList<>(); |
| for (Edge e : v.getEdges(Direction.OUT)) { |
| if (e.getLabel().startsWith(v.<String>getProperty(Constants.ENTITY_TYPE_PROPERTY_KEY))) { |
| VertexWrapper trait = new TermVertexWrapper(e.getVertex(Direction.IN)); |
| if (! trait.getPropertyKeys().contains("available_as_tag") && ! isDeleted(trait.getVertex())) { |
| vertices.add(trait); |
| } |
| } |
| } |
| return Collections.singletonList(new RelationSet("traits", vertices)); |
| } |
| |
| @Override |
| public Pipe asPipe() { |
| return new FilterFunctionPipe<>(new PipeFunction<Edge, Boolean>() { |
| @Override |
| public Boolean compute(Edge edge) { |
| String name = edge.getVertex(Direction.OUT).getProperty(Constants.ENTITY_TYPE_PROPERTY_KEY); |
| if (edge.getLabel().startsWith(name)) { |
| VertexWrapper v = new TermVertexWrapper(edge.getVertex(Direction.IN)); |
| return ! v.getPropertyKeys().contains("available_as_tag") && ! isDeleted(v.getVertex()); |
| } else { |
| return false; |
| } |
| } |
| }); |
| } |
| |
| @Override |
| public ResourceDefinition getResourceDefinition() { |
| return resourceDefinition; |
| } |
| } |