Factory Method

最新推荐文章于 2004-12-26 17:40:00 发布
最新推荐文章于 2004-12-26 17:40:00 发布
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CC 4.0 BY-SA版权
分类专栏： Design Patterns 文章标签： class interface object
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本文链接：https://blog.youkuaiyun.com/wangjiong/article/details/80503
博客介绍了代码仅与接口交互，无需绑定特定类，能与实现该接口的任何类协作，且类内创建对象更灵活，子类可提供扩展版本。还说明了适用场景，如类无法预知需创建的对象类、希望子类指定实例化对象等。

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Benefits
It removes the need to bind application-specific classes into the code. The code interacts solely with the resultant interface, so it will work with any classes that implement that interface.
Because creating objects inside a class is more flexible than creating an object directly, it enables the subclass to provide an extended version of an object.

Applicable Scenarios
A class is not able to anticipate the class of objects it needs to create.
A class wants its subclasses to specify the objects it instantiates.
Classes assign responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate.

设计模式9-工厂模式（Factory Method）
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通过对象超级模式绕开。动态内存分配（new)，来避免对象创建过程中所导致的紧耦合(依赖具体类)，从而支持对象创建的稳定，它是结构抽象之后的第一步工作。工厂方法（Factory Method Pattern）抽象工厂（Abstract Factory Pattern）提供一个接口，用于创建相关或依赖对象的家族，而不需要指定具体的类。原型模式（Prototype Pattern）将一个复杂对象的构建过程与其表示分离，使得同样的构建过程可以创建不同的表示。
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在给定的"FactoryMethod"压缩包中，我们可以看到一个简单的工厂方法模式的实现。在这个例子中，可能会有如下结构： - `Product`：代表产品接口，例如定义了`produce()`方法。 - `ConcreteProduct1`, `...
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今天我们要探讨的是设计模式中的一个经典成员——工厂方法模式（Factory Method Pattern）。工厂方法模式是创建型设计模式的一种，它提供了一种创建对象的最佳方式。 ### 一、什么是工厂方法模式？ 工厂方法模式...
The Strategy, Template Method, and Bridge Patterns
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One of the great benefits of object-oriented programming is polymorphism; i.e., the ability to send a message to an object without knowing the true type of the object. Perhaps no pattern illustrates t
The Design Patterns Used in PetStore 2. Command
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A facades effectiveness is limited, since complex applications can cause the facades API to grow too large. This is the case with the sample application. Rather than continuing to add methods to the
Interpreter
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Benefits:• It is easier to change and extend the grammar.• Implementing the grammar is straightforward.Applicable Scenarios:• The grammar of the language is not complicated.• Efficiency is not a pri
State
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Benefits:• It keeps state-specific behavior local and partitions behavior for different states.• It makes any state transitions explicit.Applicable Scenarios:• The behavior of an object depends on i
The Design Patterns Used in PetStore 1. Facade
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The petstore application uses a facade session bean as a single interface to other enterprise bean business objects.When a web tier controller receives the requests from the client, it then passes the
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Benefit: • The Template Method pattern is a very common technique for reusing code.Applicable Scenarios:• You want to implement the nonvarying parts of an algorithm in a single class and the varying
Observer
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Benefits:• It abstracts the coupling between the subject and the observer.• It provides support for broadcast type communication.Applicable Scenarios:• A change to an object requires changing other
Mediator
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Benefits:• It decouples colleagues.• It simplifies object protocols.• It centralizes control.• The individual components become simpler and much easier to deal with because they do not need to pass me
Iterator
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Benefits:• It supports variations in the traversal of a collection.• It simplifies the interface to the collection.Applicable Scenarios:• Access to a collection object is required without having to
Builder
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Benefits: It permits you to vary an object’s internal representation. It isolates the code for construction and representation. It provides finer control over the construction process.Applicable Sce
Strategy
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Benefits:• It provides a substitute to subclassing.• It defines each behavior within its own class, eliminating the need for conditional statements.• It makes it easier to extend and incorporate new b
Decorator
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Benefits:• It provides greater flexibility than static inheritance.• It avoids the need to place feature-laden classes higher up the hierarchy.• It simplifies coding by allowing you to develop a serie
Abstract Factory
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Benefits: It isolates client from concrete (implementation) classes. It eases the exchanging of object families. It promotes consistency among objects.Applicable Scenarios: The system needs to be in
The differences between some patterns.
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Abstract Factory and Factory MethodThe Abstract factory pattern is used for creating many objects that are dependent on each other. The Factory Method pattern provides an interface for creating an o
深入解析Factory Method设计模式及实现
标题和描述中提及的“Factory Method 设计模式”，通常翻译为“工厂方法设计模式”，是软件设计模式中的一种创建型模式。该模式提供了一种在创建对象的同时隐藏创建逻辑的方式，而不是使用新的构造器直接实例化对象...
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