factory-pattern

问题 In Design Pattern by Gamma et al, "Factory Method" has the following structure: "Abstract Factory" has the following structure: Why does Creator has a method AnOperation() to call FactoryMethod() in Factory Method pattern, while AbstractFactory doesn't have a method to call CreateProductA() and CreateProductB() in Abstract Factory pattern? Does Creator 's method AnOperation() calling FactoryMethod() follow the Template pattern, whose structure is ? 回答1: It's simple: given "first-order factory

问题 I'm trying to get Unity to be my factory in a factory pattern, hence return different implementations of an Interface depending upon the named instance. I have the following code public static class Factory { private static readonly IUnityContainer container; static Factory() { container = new UnityContainer(); container .AddNewExtension<EnterpriseLibraryCoreExtension>() .AddNewExtension<Interception>() .RegisterType<IInterceptionBehavior, LoggingBehaviour>() //register the implemantation1

问题 This is related to creating and destroying objects from the book 'Effective Java' by Joshua Bloch Item 1: Consider static factory methods instead of constructors This method translates a boolean primitive value into a Boolean object reference: public static Boolean valueOf(boolean b) { return b ? Boolean.TRUE : Boolean.FALSE; } Note that a static factory method is not the same as the Factory Method pattern from Design Patterns [Gamma95, p. 107]. The static factory method described in this

问题 I want to decouple the creation of JavaScript objects from the code that is using it so that I have the flexibility of replacing one object implementation with other object implementation having same signature without touching much of the code. In order to achieve this I come up with the concept of Repository and a Factory Method to create objects. Here is the implementation: //The Factory Method function ObjectFactory() {} ObjectFactory.create = function (o) { var args = [].slice.call

问题 I am studying the Factory pattern and I have some doubts about which is the best way to buil it. I developed two progamas that do exactly the same, the only difference is the code that implements the pattern in question. After comparison could help me find: Code which one is better for reusability, for the JVM, for performance, etc, number 1 or 2? Is a 3.er optimal way to do even more? Shared Classes Artist public class ArtistFrame extends AbstractFactoryJInternalFrame { public ArtistFrame

问题 I am sorry for the long text but I would like to present the problem I am trying to solve with this as well as the actual problem. Maybe I will be pointed to another, possibly better approach. I would like to create an eventtriggerred handler system. I will have several handler modules. The basic idea is that during initialization these modules will register for events they handle (register(module,eventItGetsCalledFor)) in a eventlist. In the case an event is triggered, it is looked up in the

问题 I know that there are many similar questions, but I don't understand most of those questions because I'm not sure if I know what a factory method pattern is.. so..after reading many examples over the web, I came up with the following simple classes. Am I doing it correctly? abstract class Driveable { abstract public function start(); abstract public function stop(); } class CoupeDriveable extends Driveable { public function start() { } public function stop() { } } class MotorcycleDriveable

问题 I already asked a similar question here, however I didn't really get the answer I wanted because my question was poorly formulated and the examples were bad. So I give it another shot, with hopefully a better explanation and better code . The code bellow has been stripped out of unnecessary details but it works . The thing is I would like to use Template Argument Deduction, if possible, to simplify the templated function call . I have a factory which creates commands. To create a command, I

问题 I have a Data Access Layer library that I would like to make "portable". The reason I like it to be portable is because I want to work with SQL Azure & Azure File Storage (eg, data + pdf reports) as well as Sql Server 2008R2 and File System storage on a concrete server. Based on spec the system is supposed to go live with the later implementation (sql + file system storage), while upon a meeting a certain scalability threshold we plan on moving to Azure. The data access class I use implements

问题 this is a follow-up question to my last one here: iOS: Initialise object at start of application for all controllers to use . I have set my application up as follows (ignore the DB Prefix): DBFactoryClass // Built a DataManaging Object for later use in the app DBDataModel // Is created by the factory, holds all data & access methods DBViewControllerA // Will show some of the data that DBDataModel holds moreViewControllers that will need access to the same DBDataModel Object i will go step by