mathjs/lib/json/reviver.js

'use strict';

module.exports = function (math) {

  var BigNumber   = require('../type/BigNumber');
  var Complex     = math.type.Complex;
  var Help        = math.type.Help;
  var Index       = math.type.Index;
  var DenseMatrix = math.type.DenseMatrix;
  var CcsMatrix   = math.type.CcsMatrix;
  var Range       = math.type.Range;
  var ResultSet   = math.type.ResultSet;
  var Unit        = math.type.Unit;

  /**
   * Instantiate mathjs data types from their JSON representation
   * @param {string} key
   * @param {*} value
   * @returns {*} Returns the revived object
   */
  function reviver(key, value) {
    var type = value && value.mathjs;

    switch (type) {
      case 'BigNumber':   return BigNumber.fromJSON(value);
      case 'Complex':     return Complex.fromJSON(value);
      case 'Help':        return Help.fromJSON(value);
      case 'Index':       return Index.fromJSON(value);
      case 'DenseMatrix': return DenseMatrix.fromJSON(value);
      case 'CcsMatrix':   return CcsMatrix.fromJSON(value);
      case 'Range':       return Range.fromJSON(value);
      case 'ResultSet':   return ResultSet.fromJSON(value);
      case 'Unit':        return Unit.fromJSON(value);
    }

    return value;
  }

  return reviver;
};