@mnakhla/rocketrml/src/input-parser/JSONParser.js

This is a forked rocketrml mapper for the RDF mapping language

const { JSONPath } = require('jsonpath-plus');
const helper = require('./helper');

class JsonParser {
  constructor(inputPath, iterator, options) {
    this.iterator = iterator;
    this.json = helper.readFileJSON(inputPath, options);
    this.paths = JSONPath({
      path: iterator,
      json: this.json,
      resultType: 'path',
    });
  }

  getCount() {
    return this.paths.length;
  }

  getData(index, selector) {
    const sel = selector.replace(/^PATH~/, '');
    const splitter = sel.startsWith('[') ? '' : '.';
    const arr = JSONPath({
      path: `${this.paths[index]}${splitter}${sel}`,
      json: this.json,
      resultType: selector.startsWith('PATH~') ? 'pointer' : 'value',
    }).filter((e) => e !== null && e !== undefined); // null values are ignored (undefined shouldn't happens since input is json)

    if (arr.length === 1 && Array.isArray(arr[0])) {
      return arr[0].map((e) => e.toString());
    }
    return arr.map((e) => e.toString());
  }
}

module.exports = JsonParser;