abstract-factory | 易学教程

Abstract factory pattern [closed]

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Good example for Abstract factory pattern in C#? What are the advantages of the Abstract factory pattern in C#? How to use C# generics with the Abstract factory pattern? How to unit test with the Abstract factory pattern? First of all, I would suggest you to read about the Abstract Factory pattern, for example here . Now I will try to explain why you would use this pattern. Normally, if you use the Factory pattern, you will create objects in a Factory. The problem arises when you have multiple implementation of a given class (or classes). Now, those multiple implementations are grouped. You

Avoiding all DI antipatterns for types requiring asynchronous initialization

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问题 I have a type Connections that requires asynchronous initialization. An instance of this type is consumed by several other types (e.g., Storage ), each of which also require asynchronous initialization (static, not per-instance, and these initializations also depend on Connections ). Finally, my logic types (e.g., Logic ) consumes these storage instances. Currently using Simple Injector. I've tried several different solutions, but there's always an antipattern present. Explicit Initialization

What is the difference between Factory and Strategy patterns?

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Can any one explain the difference between factory and strategy patterns? For me both are looking same other than an extra factory class (which create an object of product in factory patterns) A factory pattern is a creational pattern. A strategy pattern is an operational pattern. Put another way, a factory pattern is used to create objects of a specific type. A strategy pattern is use to perform an operation (or set of operations) in a particular manner. In the classic example, a factory might create different types of Animals: Dog, Cat, Tiger, while a strategy pattern would perform

Abstract factory pattern [closed]

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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 3 years ago . Good example for Abstract factory pattern in C#? What are the advantages of the Abstract factory pattern in C#? How to use C# generics with the Abstract factory pattern? How to unit test with the Abstract factory pattern? 回答1: First of all, I would suggest you to read about the

What is the difference between Factory and Strategy patterns?

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问题 Can any one explain the difference between factory and strategy patterns? For me both are looking same other than an extra factory class (which create an object of product in factory patterns) 回答1: A factory pattern is a creational pattern. A strategy pattern is an operational pattern. Put another way, a factory pattern is used to create objects of a specific type. A strategy pattern is use to perform an operation (or set of operations) in a particular manner. In the classic example, a

What is the basic difference between the Factory and Abstract Factory Design Patterns? [closed]

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What is the basic difference between the Factory and Abstract Factory Patterns? 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 for anyone to provide their own factory. This allows your warehouse to be either an IFruitFactory or an IJuiceFactory , without requiring your warehouse to know anything about fruits or juices. Sudhakar Kalmari Source for this information taken from: http://java.dzone.com/news/intro-design-patterns-abstract Abstract

Factory, Abstract Factory and Factory Method

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问题 I am really confused about these three terms. My understanding is that: in the Factory pattern, there is no concrete factory. The factory builds the new objects according to the parameters. in Abstract Factory pattern, there are multiple concrete factories. The client has to create different concrete factories explicitly. Is that right? What are the other differences? Furthermore, what is the Factory Method pattern? Is it same as the Factory pattern? 回答1: The Gang Of Four "Design Patterns;

Design Patterns: Abstract Factory vs Factory Method

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问题 Note: Questions are at the end of the post. I have read the other stackoverflow threads regarding Abstract Factory vs Factory Method . I understand the intent of each pattern. However, I am not clear on the definition. Factory Method defines an interface for creating an object, but lets subclasses decide which of those to instantiate. A factory method lets classes defer instantiation to subclasses. By contrast, an Abstract Factory provides an interface for creating families of related or

Why do we need Abstract factory design pattern?

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问题 Most of the definition says: An abstract factory provides an interface for creating families of related objects without specifying their concrete classes What is the use of Abstract Factory Pattern as we can achieve the task via creating object of concrete class itself. Why do we have a factory method that creates object of Concrete class? Please provide me any real life example where I must implement abstractFactory pattern? 回答1: Abstract Factory is a very central design pattern for