As you have already figured out, Dependency Injection (DI) itself is only a collection of patterns and techniques. At the root of the application we wire up all necessary object graphs. This place is called the Composition Root, and we can use a DI Container to do this wiring for us, or we can do … Read more
You should modify your code to return a promise and use the value in controller pls see dummy modified code myDemo.factory(‘photosFactory’, function($http) { return{ getPhotos : function() { return $http({ url: ‘content/test_data.json’, method: ‘GET’ }) } } }); and controller – controllers.AppCtrl = function($scope, $location, $http, photosFactory) { $scope.photos = []; photosFactory.getPhotos().success(function(data){ $scope.photos=data; }); };
What you’ve done is probably the best way to go about it, until a switch on string is available. (Edit 2019: A switch on string is available – use that.) You could create factory objects and a map from strings to these. But this does get a tad verbose in current Java. private interface AnimalFactory … Read more
I’m not entirely sure what use case you are trying to satisfy. But it is possible to have a factory return instances of an object. You should be able to modify this to suit your needs. var ExampleApplication = angular.module(‘ExampleApplication’, []); ExampleApplication.factory(‘InstancedService’, function(){ function Instance(name, type){ this.name = name; this.type = type; } return { … Read more
You can make the constructor private, and the factory a nested type: public class BusinessObject { private BusinessObject(string property) { } public class Factory { public static BusinessObject CreateBusinessObject(string property) { return new BusinessObject(property); } } } This works because nested types have access to the private members of their enclosing types. I know it’s … Read more
Are you familiar with JDBC? It’s one and all (abstract) factory. It’s a good real world example. // Factory method. Loads the driver by given classname. It actually returns a // concrete Class<Driver>. However, we don’t need it here, so we just ignore it. // It can be any driver class name. The MySQL one … Read more
Here is a table displaying pairs of Strings and Objects of various types. A custom cell factory is used to handle display of different object types (by performing an instanceof check on the object’s type and rendering the appropriate text or graphic). import javafx.application.*; import javafx.beans.property.ReadOnlyObjectWrapper; import javafx.beans.value.ObservableValue; import javafx.collections.*; import javafx.scene.Scene; import javafx.scene.control.*; import … Read more
The Gang Of Four “Design Patterns; Elements of Reusable Object-Oriented Software” book contains two entries, “Abstract Factory” (aka ‘Virtual Constructor’) and “Factory Method”. I don’t know about “Concrete Factory.” I’ve heard the term, but never given it too much thought. Factory Method In “Factory Method” an object has a method which is responsible for the … Read more
Quoting https://web.archive.org/web/20140227201242/http://v1.dione.zcu.cz/java/docs/jndi-1.2/tutorial/beyond/misc/policy.html At the root context of the namespace is a binding with the name “comp”, which is bound to a subtree reserved for component-related bindings. The name “comp” is short for component. There are no other bindings at the root context. However, the root context is reserved for the future expansion of the policy, … Read more
Here’s some supplemental information that may help better understand several of the other shorter, although technically correct, answers. In the strictest sense a Class Factory is a function or method that creates or selects a class and returns it, based on some condition determined from input parameters or global context. This is required when the … Read more