| /* |
| * 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.tinkerpop.gremlin.neo4j.structure; |
| |
| import org.apache.tinkerpop.gremlin.structure.Direction; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Element; |
| import org.apache.tinkerpop.gremlin.structure.Property; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.util.ElementHelper; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| import org.apache.tinkerpop.gremlin.structure.util.wrapped.WrappedEdge; |
| import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; |
| import org.neo4j.tinkerpop.api.Neo4jRelationship; |
| |
| import java.util.Iterator; |
| |
| /** |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public final class Neo4jEdge extends Neo4jElement implements Edge, WrappedEdge<Neo4jRelationship> { |
| |
| public Neo4jEdge(final Neo4jRelationship relationship, final Neo4jGraph graph) { |
| super(relationship, graph); |
| } |
| |
| @Override |
| public Vertex outVertex() { |
| return new Neo4jVertex(this.getBaseEdge().start(), this.graph); |
| } |
| |
| @Override |
| public Vertex inVertex() { |
| return new Neo4jVertex(this.getBaseEdge().end(), this.graph); |
| } |
| |
| @Override |
| public Iterator<Vertex> vertices(final Direction direction) { |
| this.graph.tx().readWrite(); |
| switch (direction) { |
| case OUT: |
| return IteratorUtils.of(new Neo4jVertex(this.getBaseEdge().start(), this.graph)); |
| case IN: |
| return IteratorUtils.of(new Neo4jVertex(this.getBaseEdge().end(), this.graph)); |
| default: |
| return IteratorUtils.of(new Neo4jVertex(this.getBaseEdge().start(), this.graph), new Neo4jVertex(this.getBaseEdge().end(), this.graph)); |
| } |
| } |
| |
| @Override |
| public void remove() { |
| this.graph.tx().readWrite(); |
| try { |
| this.baseElement.delete(); |
| } catch (IllegalStateException ignored) { |
| // NotFoundException happens if the edge is committed |
| // IllegalStateException happens if the edge is still chilling in the tx |
| } catch (RuntimeException e) { |
| if (!Neo4jHelper.isNotFound(e)) throw e; |
| // NotFoundException happens if the edge is committed |
| // IllegalStateException happens if the edge is still chilling in the tx |
| } |
| } |
| |
| public String toString() { |
| return StringFactory.edgeString(this); |
| } |
| |
| @Override |
| public String label() { |
| this.graph.tx().readWrite(); |
| return this.getBaseEdge().type(); |
| } |
| |
| @Override |
| public Neo4jRelationship getBaseEdge() { |
| return (Neo4jRelationship) this.baseElement; |
| } |
| |
| @Override |
| public <V> Iterator<Property<V>> properties(final String... propertyKeys) { |
| this.graph.tx().readWrite(); |
| Iterable<String> keys = this.baseElement.getKeys(); |
| Iterator<String> filter = IteratorUtils.filter(keys.iterator(), |
| key -> ElementHelper.keyExists(key, propertyKeys)); |
| return IteratorUtils.map(filter, |
| key -> new Neo4jProperty<>(this, key, (V) this.baseElement.getProperty(key))); |
| } |
| |
| @Override |
| public <V> Property<V> property(final String key) { |
| this.graph.tx().readWrite(); |
| if (this.baseElement.hasProperty(key)) |
| return new Neo4jProperty<>(this, key, (V) this.baseElement.getProperty(key)); |
| else |
| return Property.empty(); |
| } |
| |
| @Override |
| public <V> Property<V> property(final String key, final V value) { |
| ElementHelper.validateProperty(key, value); |
| |
| if (null == value) { |
| properties(key).forEachRemaining(Property::remove); |
| return Property.empty(); |
| } |
| |
| this.graph.tx().readWrite(); |
| try { |
| this.baseElement.setProperty(key, value); |
| return new Neo4jProperty<>(this, key, value); |
| } catch (final IllegalArgumentException e) { |
| throw Property.Exceptions.dataTypeOfPropertyValueNotSupported(value, e); |
| } |
| } |
| } |