What is factory design pattern in Spring?
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What is factory design pattern in Spring?
Factory Method Pattern. The factory method pattern entails a factory class with an abstract method for creating the desired object. Often, we want to create different objects based on a particular context. For example, our application may require a vehicle object.
What is factory design pattern in Java with example?
The factory design pattern says that define an interface ( A java interface or an abstract class) and let the subclasses decide which object to instantiate. The factory method in the interface lets a class defer the instantiation to one or more concrete subclasses.
How do we implement factory patterns in Spring?
In the application, you can create an abstract class, say BasePizzaFactory with a factory method to create a pizza. You can then create a subclass of BasePizzaFactory , called PizzaFactory to implement the factory method. In the factory method, you can create and return a proper Pizza object.
What is factory design pattern with example?
This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object. In Factory pattern, we create object without exposing the creation logic to the client and refer to newly created object using a common interface.
What is factory method in Java Spring?
Spring framework provides facility to inject bean using factory method. To do so, we can use two attributes of bean element. factory-method: represents the factory method that will be invoked to inject the bean. factory-bean: represents the reference of the bean by which factory method will be invoked.
What is Factory Method design pattern?
In class-based programming, the factory method pattern is a creational pattern that uses factory methods to deal with the problem of creating objects without having to specify the exact class of the object that will be created.
What are the types of factory pattern?
the abstract factory pattern, the static factory method, the simple factory (also called factory).
Is Spring boot a factory pattern?
this is the usual way of implementing the factory pattern in Core Java. In Springboot with the dependency injection ( IoC ) the objects are created and injected automatically. we will see how to create a new object every time and implement the factory pattern.
What is a Factory Method give reference to any example class?
Factory Method Pattern. A Factory Pattern or Factory Method Pattern says that just define an interface or abstract class for creating an object but let the subclasses decide which class to instantiate. In other words, subclasses are responsible to create the instance of the class.
What is factory and abstract factory pattern demonstrate with example?
Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object.
What is a factory method give reference to any example class?
What is factory method in Java?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes. Factory Method defines a method, which should be used for creating objects instead of direct constructor call ( new operator).
What is factory bean in Spring?
A FactoryBean is a pattern to encapsulate interesting object construction logic in a class. It might be used, for example, to encode the construction of a complex object graph in a reusable way. Often this is used to construct complex objects that have many dependencies.
How does a factory design pattern work?
What is factory and Abstract Factory pattern?
The factory method is just a method, it can be overridden in a subclass, whereas the abstract factory is an object that has multiple factory methods on it. The Factory Method pattern uses inheritance and relies on a subclass to handle the desired object instantiation.
Where is factory design pattern used in Java?
The factory design pattern is used when we have a superclass with multiple sub-classes and based on input, we need to return one of the sub-class. This pattern takes out the responsibility of the instantiation of a class from the client program to the factory class.
How do you use bean factory in Spring?
- The first step is to create a factory object where we used the framework APIXmlBeanFactory() to create the factory bean andClassPathResource() API to load the bean configuration file available in CLASSPATH.
- The second step is used to get the required bean using getBean() method of the created bean factory object.
What is object factory in Spring?
Interface ObjectFactory Defines a factory which can return an Object instance (possibly shared or independent) when invoked. This interface is typically used to encapsulate a generic factory which returns a new instance (prototype) of some target object on each invocation.
