kepler.gl/dist/utils/table-utils/data-container-utils.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.createDataContainer = createDataContainer;
exports.createIndexedDataContainer = createIndexedDataContainer;
exports.getSampleData = getSampleData;
exports.DataForm = void 0;

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

var _rowDataContainer = require("./row-data-container");

var _indexedDataContainer = require("./indexed-data-container");

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { (0, _defineProperty2["default"])(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

/** @type {import('./data-container-utils').DataForm} */
var DataForm = {
  ROWS_ARRAY: 'ROWS_ARRAY'
};
/** @type {import('./data-container-utils').DataContainerOptions} */

exports.DataForm = DataForm;
var defaultOptions = {
  inputDataFormat: DataForm.ROWS_ARRAY
};
/** @type {typeof import('./data-container-utils').createDataContainer} */

function createDataContainer(data) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOptions;
  options = _objectSpread(_objectSpread({}, defaultOptions), options);

  if (options.inputDataFormat === DataForm.ROWS_ARRAY) {
    return new _rowDataContainer.RowDataContainer({
      rows: data,
      fields: options.fields
    });
  }

  throw Error('Failed to create a data container: not implemented format');
}
/** @type {typeof import('./data-container-utils').createIndexedDataContainer} */


function createIndexedDataContainer(dataContainer, indices) {
  return new _indexedDataContainer.IndexedDataContainer(dataContainer, indices);
}
/** @type {typeof import('./data-container-utils').getSampleData} */


function getSampleData(dataContainer) {
  var sampleSize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 500;
  var numberOfRows = dataContainer.numRows();
  var sampleStep = Math.max(Math.floor(numberOfRows / sampleSize), 1);
  var indices = [];

  for (var i = 0; i < numberOfRows; i += sampleStep) {
    indices.push(i);
  }

  return createIndexedDataContainer(dataContainer, indices);
}
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