sas factory

before explaining the simple factory pattern, it is necessary to understand some of the principles of OO NBSP;1.OCP (opening and closing principles, open-closed principle): A software entity should be open to extension and closed to modifications. That is, for an existing software, if it needs to be extended, it should be done on the basis that there is no need to modify the existing code. 2.DIP (relying on the reverse principle, dependence inver

Introduction to Factory mode.The factory model is dedicated to instantiating a large number of classes with common interfacesFactory mode can dynamically decide which class to instantiate, without knowing in advance which class to instantiate each time.There are three types of factory models:1, simple factory model

Design patterns can be divided into three types depending on the type of use:1. creation mode : Factory (Factory mode), Singleton (single State), Builder ((builder mode), Prototype (prototype mode), factory method mode.2. structure mode : Flyweight (Shared mode), Bridge (bridge mode), Decorator ((decorative mode), Composite ((combo mode), Adapter (adapter mode),

Direct point, the factory model is to take over the creation of objects, at the same time, new () can do the additional exception handling, initialization and other operations, but also reduce the coupling between the modules, easy to maintain and expand.Based on the complexity of the object creation, it can be divided into simple Factory mode, factory law mode a

One: Simple Factory mode 1, Concept A simple factory model is a factory object that determines which product class instances are created. As the name implies, the factory is the production of things, there are raw materials (parameters), mold (object) can produce a lot of objects with the same function. 2,UML Chart 3

This example is about 3 kinds of fruit in an orchard, and industrious gardeners take care of them and give them when they need fruit. 1. Factory Method Example Class diagram 2. Java Implementation Code Package Cn.edu.ynu.sei.factoryMethod; /** * Orchard Gardener Interface * * @author 88250 * @version 1.0.0, 2007-8-12 * @uml. Dependency supplier= "Cn.edu.ynu.sei.factoryMethod.Fruit" */ public interface Fruitgardener { /** *

These days are learning design patterns, read the book, must write a simple example bar:-) So, from today began to write a simple pure design pattern to implement the Java code, the first more shallow to experience the idea of design patterns. So that it can be used correctly later in the actual project. In this example, Arttracer's accusation is to draw a variety of graphics according to the customer's request; The shape interface provides some common drawing operations, which are implemented

OPPO N3 Restore factory settings: This will reset the phone to its original factory status, wiping out all data and downloaded applications. The data will not recover, please restore the factory back to your own data. OPPO N3 Restore Factory method One: Enter the OPPO N3 mobile phone "settings"-"General"-"more" click

3 Complete Solutions Sunny company developers decided to use the factory method model to design the logger, the basic structure of which is shown in Figure 3: Figure 3 Log recorder structure diagram In Figure 3, the Logger interface acts as an abstract product whose subclasses FileLogger and Databaselogger act as specific products, and the Loggerfactory interface acts as an abstract factory, Its subclasse

1, factory method modeFactory method mode is the creation mode of a class, also known as virtual Construction sub-mode or polymorphism Factory mode. The factory method pattern is intended to define a factory interface that creates product objects, deferring the actual work to subclasses.1.1, what is the

The factory class is a class that is designed to create other objects, and factory classes are very important in the practice of polymorphism programming. It allows you to dynamically replace classes, modify configurations, and make your application more flexible. Mastering the factory model is essential for web development.