2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.openecomp.aai.serialization.tinkerpop;
23 import java.util.Iterator;
25 import org.apache.tinkerpop.gremlin.structure.Direction;
26 import org.apache.tinkerpop.gremlin.structure.Edge;
27 import org.apache.tinkerpop.gremlin.structure.Graph;
28 import org.apache.tinkerpop.gremlin.structure.Vertex;
29 import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedEdge;
30 import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils;
34 * Represents a {@link Edge} that is disconnected from a {@link Graph} however,
35 * traversals are supported as they are backed by a Tree with saturated {@link Vertex} and {@link Edge} objects.
36 * These objects are not mutable and can only be used to read information out.
39 public class TreeBackedEdge extends DetachedEdge implements Edge {
41 private static final long serialVersionUID = 5419650145562077538L;
42 private TreeBackedVertex inVertex;
43 private TreeBackedVertex outVertex;
44 public TreeBackedEdge(Edge edge, TreeBackedVertex inVertex, TreeBackedVertex outVertex) {
46 this.inVertex = inVertex;
47 this.outVertex = outVertex;
51 public Vertex inVertex() {
56 public Vertex outVertex() {
57 return this.outVertex;
61 public Iterator<Vertex> bothVertices() {
62 return this.vertices(Direction.BOTH);
66 public Iterator<Vertex> vertices(Direction direction) {
69 return IteratorUtils.of(this.outVertex);
71 return IteratorUtils.of(this.inVertex);
73 return IteratorUtils.of(this.outVertex, this.inVertex);