devextreme/dist/transpiled/core/utils/dependency_injector.js

HTML5 JavaScript Component Suite for Responsive Web Development

"use strict";

module.exports = function (object) {
    var extend = require("./extend").extend,
        isFunction = require("./type").isFunction,
        each = require("./iterator").each,
        Class = require("../class");

    var BaseClass = Class.inherit(object),
        InjectedClass = BaseClass,
        instance = new InjectedClass(object),
        initialFields = {};

    var injectFields = function injectFields(injectionObject, initial) {
        each(injectionObject, function (key) {
            if (isFunction(instance[key])) {
                if (initial || !object[key]) {
                    object[key] = function () {
                        return instance[key].apply(object, arguments);
                    };
                }
            } else {
                if (initial) {
                    initialFields[key] = object[key];
                }
                object[key] = instance[key];
            }
        });
    };

    injectFields(object, true);

    object.inject = function (injectionObject) {
        InjectedClass = InjectedClass.inherit(injectionObject);
        instance = new InjectedClass();
        injectFields(injectionObject);
    };

    object.resetInjection = function () {
        extend(object, initialFields);
        InjectedClass = BaseClass;
        instance = new BaseClass();
    };

    return object;
};