Creating factories mode
Interface definition for creating an object, but let subclasses decide which class to instantiate
role
- Product definitions factory methods to create objects
- ConcreteProduct achieve Product Interface, the definition of concrete products.
- Factory methods to create a Product Creator is used to declare the type of object.
- ConcreteCreator Creator factory method is implemented specifically for producing specific products ConcreteProduct.
Collaboration
Creator relies on its subclasses define factory methods.
Feature
- Abstract interfaces oriented product (Product); when adding a new type of product factory class for the abstract factory interface (Creator)
- When the user needs to add a new class of product type (NewProduct), corresponding to only need to add a new factory class (NewProductFactory)
- When users need to use the new product class, simply call the new factory class (NewProductFactory) to get new products to
Examples
// 产品 例如 果汁
public class Juicer{
public Juicer MakeJuice()
}
// 苹果汁
public class appleJuicer extends Juicer {}
// 销售员
public class Waiter{
public void sell(Juicer juicer){}
}
