| /* |
| * 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.structure.util.reference; |
| |
| 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.StringFactory; |
| import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils; |
| |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public class ReferenceEdge extends ReferenceElement<Edge> implements Edge { |
| |
| private ReferenceVertex inVertex; |
| private ReferenceVertex outVertex; |
| |
| private ReferenceEdge() { |
| |
| } |
| |
| public ReferenceEdge(final Edge edge) { |
| super(edge); |
| this.inVertex = new ReferenceVertex(edge.inVertex()); |
| this.outVertex = new ReferenceVertex(edge.outVertex()); |
| } |
| |
| public ReferenceEdge(final Object id, final String label, final ReferenceVertex inVertex, final ReferenceVertex outVertex) { |
| super(id, label); |
| this.inVertex = inVertex; |
| this.outVertex = outVertex; |
| } |
| |
| @Override |
| public <V> Property<V> property(final String key, final V value) { |
| throw Element.Exceptions.propertyAdditionNotSupported(); |
| } |
| |
| @Override |
| public void remove() { |
| throw Edge.Exceptions.edgeRemovalNotSupported(); |
| } |
| |
| @Override |
| public Iterator<Vertex> vertices(final Direction direction) { |
| if (direction.equals(Direction.OUT)) |
| return IteratorUtils.of(this.outVertex); |
| else if (direction.equals(Direction.IN)) |
| return IteratorUtils.of(this.inVertex); |
| else |
| return IteratorUtils.of(this.outVertex, this.inVertex); |
| } |
| |
| @Override |
| public Vertex inVertex() { |
| return this.inVertex; |
| } |
| |
| @Override |
| public Vertex outVertex() { |
| return this.outVertex; |
| } |
| |
| @Override |
| public <V> Iterator<Property<V>> properties(final String... propertyKeys) { |
| return Collections.emptyIterator(); |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.edgeString(this); |
| } |
| } |