| /* |
| * 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. |
| */ |
| |
| def stringify(v) { |
| def vertex = [v.id(), v.label()] |
| switch (v.label()) { |
| case "song": |
| vertex << v.value("name") |
| vertex << v.value("songType") |
| vertex << v.value("performances") |
| break |
| case "artist": |
| vertex << v.value("name") |
| break |
| default: |
| throw new Exception("Unexpected vertex label: ${v.label()}") |
| } |
| def g = v.graph().traversal() |
| def outE = g.V(v).outE().map { |
| def e = it.get() |
| def weight = e.property("weight") |
| def edge = [e.label(), e.inVertex().id()] |
| if (weight.isPresent()) edge << weight.value() |
| return edge.join(",") |
| } |
| def inE = g.V(v).inE().map { |
| def e = it.get() |
| def weight = e.property("weight") |
| def edge = [e.label(), e.outVertex().id()] |
| if (weight.isPresent()) edge << weight.value() |
| return edge.join(",") |
| } |
| return [vertex.join(","), outE.join("|"), inE.join("|")].join("\t") |
| } |
