factory-method

问题 The documentation of method context.getBean(name, user) says Allows for specifying explicit constructor arguments / factory method arguments but no matter what I do (tried everything), with the most logical setting I get this when the beans are being loaded up during initialization: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'fileValidator' defined in PortletContext resource [/WEB-INF/classes/context/customer-form-portlet.xml]: Unsatisfied

问题 This is a question regarding the best practice for creating an instance of a class or type from different forms of the same data using python. Is it better to use a class method or is it better to use a separate function altogether? Let's say I have a class used to describe the size of a document. (Note: This is simply an example. I want to know the best way to create an instance of the class not the best way to describe the size of a document.) class Size(object): """ Utility object used to

问题 Before writing the question I read the following references: Factory Method Vs Abstract Factory Abstract Factory vs Factory Method (scope) Abstract Factory, Factory Method, Builder Factory, Abstract Factory and Factory Method Differences between Abstract Factory Pattern and Factory Method I see that many like me have had difficulty "grasping" the concrete differences between Abstract Factory and Factory Pattern. I'm not familiar with the design patterns, I came across this example http://www

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . What is the basic difference between the Factory and Abstract Factory Patterns? 回答1: With the Factory pattern, you produce instances of implementations ( Apple , Banana , Cherry , etc.) of a particular interface -- say, IFruit . With the Abstract Factory pattern, you provide a way

问题 I know there are many posts out there about the differences between these two patterns, but there are a few things that I cannot find. From what I have been reading, I see that the factory method pattern allows you to define how to create a single concrete product but hiding the implementation from the client as they will see a generic product. My first question is about the abstract factory. Is its role to allow you to create families of concrete objects in (that can depend on what specific

问题 In builder design pattern, is method buildpart() a factory method? (For comparison, an abstract factory is a collection of factory methods.) Why are they (not) factory methods? For clarification, could you also provide the definition of a factory method? An example for buildpart() from Design Patterns by Gamma et al is: void StandardMazeBuilder::BuildMaze () { _currentMaze = new Maze; } 回答1: A factory method creates a concrete object/product, usually with the new keyword, and returns that

问题 GOF talks about frameworks for "Factory method" pattern. Frameworks need objects but implementation of objects depends upon application hence an abstract method to create the object is created. Also as return type is needed so interface for the object needed is defined, it defines the apis needed for the object. Actual objects are created by subclasses (concrete Application) . This is a creational pattern. For Template pattern the only change is that the encapsulating class does not know the

问题 I would like to use factory classes and methods to generate GUI components, but I don't know how and in which class the various listeners should be declared and added to the components. If I have a simple factory class such as that listed below should I add an ActionListener to the button before it is returned to the calling class. If the answer is "Yes" then how do I add the listener? class GUIFactory { public static JButton getJButton() { JButton aButton = new JButton(); return aButton; } }

问题 This question already has answers here : What are the differences between Abstract Factory and Factory design patterns? (16 answers) Closed 5 years ago . I have read about Factory Method where Sub class creates needed Object and Abstract Factory has methods where concrete classes creates needed Object Factory Method public class PizzaStore { public Pizza orderPizza(String type) { Pizza pizza = createPizza(type); pizza.prepare(); pizza.bake(); pizza.cut(); } abstract Pizza createPizza(String

问题 TL;DR: Does Autofac support something like AutoFixture's fixture.Get() mechanism ? I'm using Autofac and need to invoke async factory methods which look like this: class AppModel { public static async Task<AppModel> CreateAsync(IDependency x, IDependency2 y) { ... } } What is the simplest way for me to execute such a method and have the arguments be supplied by Autofac ? i.e., I want to be able to do something like: Task<AppModel> creationTask = <some autofaccery>(AppModel.CreateAsync); var