| /* |
| 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. |
| */ |
| |
| const gremlin = require('gremlin'); |
| const traversal = gremlin.process.AnonymousTraversalSource.traversal; |
| const __ = gremlin.process.statics; |
| const DriverRemoteConnection = gremlin.driver.DriverRemoteConnection; |
| const p = gremlin.process.P; |
| const t = gremlin.process.t; |
| |
| async function main() { |
| /* |
| This example requires the Modern toy graph to be preloaded upon launching the Gremlin server. |
| For details, see https://tinkerpop.apache.org/docs/current/reference/#gremlin-server-docker-image and use |
| conf/gremlin-server-modern.yaml. |
| */ |
| const dc = new DriverRemoteConnection('ws://localhost:8182/gremlin'); |
| const g = traversal().withRemote(dc); |
| |
| const e1 = await g.V(1).bothE().toList(); // (1) |
| const e2 = await g.V(1).bothE().where(__.otherV().hasId(2)).toList(); // (2) |
| const v1 = await g.V(1).next(); |
| const v2 = await g.V(2).next(); |
| const e3 = await g.V(v1.value).bothE().where(__.otherV().is(v2.value)).toList(); // (3) |
| const e4 = await g.V(v1.value).outE().where(__.inV().is(v2.value)).toList(); // (4) |
| const e5 = await g.V(1).outE().where(__.inV().has(t.id, p.within(2,3))).toList(); // (5) |
| const e6 = await g.V(1).out().where(__.in_().hasId(6)).toList(); // (6) |
| |
| console.log("1: " + e1.toString()); |
| console.log("2: " + e2.toString()); |
| console.log("3: " + e3.toString()); |
| console.log("4: " + e4.toString()); |
| console.log("5: " + e5.toString()); |
| console.log("6: " + e6.toString()); |
| |
| /* |
| 1. There are three edges from the vertex with the identifier of "1". |
| 2. Filter those three edges using the where()-step using the identifier of the vertex returned by otherV() to |
| ensure it matches on the vertex of concern, which is the one with an identifier of "2". |
| 3. Note that the same traversal will work if there are actual Vertex instances rather than just vertex |
| identifiers. |
| 4. The vertex with identifier "1" has all outgoing edges, so it would also be acceptable to use the directional |
| steps of outE() and inV() since the schema allows it. |
| 5. There is also no problem with filtering the terminating side of the traversal on multiple vertices, in this |
| case, vertices with identifiers "2" and "3". |
| 6. There’s no reason why the same pattern of exclusion used for edges with where() can’t work for a vertex |
| between two vertices. |
| */ |
| |
| await dc.close(); |
| } |
| |
| main(); |