| /* |
| * 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. |
| */ |
| 'use strict'; |
| |
| /** |
| * Class to translate glv bytecode steps into executable Gremlin-Groovy script |
| */ |
| class Translator { |
| constructor(traversalSource) { |
| this._traversalSource = traversalSource; |
| } |
| |
| getTraversalSource() { |
| return this._traversalSource; |
| } |
| |
| getTargetLanguage() { |
| return "gremlin-groovy"; |
| } |
| |
| of(traversalSource) { |
| this._traversalSource = traversalSource; |
| } |
| |
| /** |
| * Returns a script representation of the given bytecode instructions. |
| * @param {Object} bytecode The bytecode object containing step instructions. |
| * @returns {string} Gremlin-Groovy script |
| */ |
| translate(bytecode) { |
| let script = this._traversalSource; |
| let instructions = bytecode.stepInstructions; |
| |
| // build the script from the glv instructions. |
| for (let i = 0; i < instructions.length; i++) { |
| const params = instructions[i].slice(1); |
| script += '.' + instructions[i][0] + '('; |
| |
| if (params.length) { |
| for (let k = 0; k < params.length; k++) { |
| if (k > 0) { |
| script += ', '; |
| } |
| |
| if (Object(params[k]) === params[k]) { |
| if (params[k].toString() === '[object Object]') { |
| Object.keys(params[k]).forEach(function(key, index) { |
| if (index > 0) script += ', '; |
| script += '(\'' + key + '\', '; |
| if (params[k][key] instanceof String || typeof params[k][key] === 'string') { |
| script += '\'' + params[k][key] + '\''; |
| } else { |
| script += params[k][key]; |
| } |
| script += ')'; |
| }); |
| } else { |
| script += params[k].toString(); |
| } |
| } else if (params[k] === undefined) { |
| script += ''; |
| } else if (typeof params[k] === 'number') { |
| script += params[k]; |
| } else { |
| script += '\'' + params[k] + '\''; |
| } |
| } |
| } |
| |
| script += ')'; |
| } |
| |
| return script; |
| } |
| } |
| |
| module.exports = Translator; |