analytics/webcontent/bi/js/gemini/lib/@waca/dashboard-common/dist/utils/MemUtil.js

'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/*
 *+------------------------------------------------------------------------+
 *| Licensed Materials - Property of IBM
 *| IBM Cognos Products: BI Dashboard
 *| (C) Copyright IBM Corp. 2019
 *|
 *| US Government Users Restricted Rights - Use, duplication or disclosure
 *| restricted by GSA ADP Schedule Contract with IBM Corp.
 *+------------------------------------------------------------------------+
 */

/**
 * Event helper class
 **/
define([], function () {

	var destroyedPrototypes = new WeakMap();
	var emptyFunction = function emptyFunction() {};

	var MemUtil = function () {
		function MemUtil() {
			_classCallCheck(this, MemUtil);
		}

		/**
   * Destroy an object - clear all attribute and set all functions to empty functions
   */
		MemUtil.destroy = function destroy(object) {
			var destroyedProto = destroyedPrototypes.get(object.__proto__);
			if (!destroyedProto) {
				destroyedProto = {};
				destroyedPrototypes.set(object.__proto__, destroyedProto);
				for (var prop in object.__proto__) {
					if (typeof object.__proto__[prop] === 'function') {
						destroyedProto[prop] = emptyFunction;
					}
				}
			}
			for (var _prop in object) {
				// clear everything referenced by this object in case someone is still holding on to it.
				if (Object.prototype.hasOwnProperty.call(object, _prop)) {
					if (typeof object[_prop] === 'function') {
						object[_prop] = emptyFunction;
					} else {
						delete object[_prop];
					}
				}
			}
			object.__proto__ = destroyedProto;
			object.__destroyed__ = true;
		};

		MemUtil.isDestroyed = function isDestroyed(object) {
			return object.__destroyed__;
		};

		return MemUtil;
	}();

	return MemUtil;
});
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