2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 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=========================================================
20 package org.onap.aai.serialization.tinkerpop;
22 import org.apache.tinkerpop.gremlin.structure.Direction;
23 import org.apache.tinkerpop.gremlin.structure.Edge;
24 import org.apache.tinkerpop.gremlin.structure.Graph;
25 import org.apache.tinkerpop.gremlin.structure.Vertex;
26 import org.apache.tinkerpop.gremlin.structure.util.detached.DetachedEdge;
27 import org.apache.tinkerpop.gremlin.util.iterator.IteratorUtils;
29 import java.util.Iterator;
33 * Represents a {@link Edge} that is disconnected from a {@link Graph} however,
34 * traversals are supported as they are backed by a Tree with saturated {@link Vertex} and {@link Edge} objects.
35 * These objects are not mutable and can only be used to read information out.
38 public class TreeBackedEdge extends DetachedEdge implements Edge {
40 private static final long serialVersionUID = 5419650145562077538L;
41 private TreeBackedVertex inVertex;
42 private TreeBackedVertex outVertex;
43 public TreeBackedEdge(Edge edge, TreeBackedVertex inVertex, TreeBackedVertex outVertex) {
45 this.inVertex = inVertex;
46 this.outVertex = outVertex;
50 public Vertex inVertex() {
55 public Vertex outVertex() {
56 return this.outVertex;
60 public Iterator<Vertex> bothVertices() {
61 return this.vertices(Direction.BOTH);
65 public Iterator<Vertex> vertices(Direction direction) {
68 return IteratorUtils.of(this.outVertex);
70 return IteratorUtils.of(this.inVertex);
72 return IteratorUtils.of(this.outVertex, this.inVertex);