The main difference between factory pattern and abstract factory pattern is that the factory pattern provides a method of creating objects without specifying the exact class used to create it while the abstract factory pattern provides a method to combine a group of individual factories without specifying their concrete classes.
What is the difference between factory pattern and factory method pattern?
One difference between the two is that with the Abstract Factory pattern, a class delegates the responsibility of object instantiation to another object via composition whereas the Factory Method pattern uses inheritance and relies on a subclass to handle the desired object instantiation.
What is abstract factory pattern in Java?
Abstract Factory Pattern In Abstract Factory we define an interface which will create families of related or dependent objects. In simple words, interface will expose multiple methods each of which will create some object. Again, here method return types will be generic interfaces.
What is the difference between factory and abstract factory in Salesforce?
Both create objects, but Factory method uses inheritance whereas Abstract Factory use composition. The Factory Method is inherited in subclasses to create the concrete objects (products) whereas Abstract Factory provide interface for creating the family of related products and subclass of these interface define how to create related products.
What is the difference between abstract factory and prototype?
Design start out using Factory Method (less complicated, more customizable, subclasses proliferate) and evolve toward Abstract Factory, Prototype, or Builder (more flexible, more complex) as the designer discovers where more flexibility is needed
What is the difference between factory and Abstract Factory pattern?
The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. 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.
What is difference between factory method and factory pattern?
The factory method is a creational design pattern, i.e., related to object creation. In the Factory pattern, we create objects without exposing the creation logic to the client and the client uses the same common interface to create a new type of object.
What is factory and Abstract Factory pattern demonstrate with example?
Abstract Factory Pattern says that just define an interface or abstract class for creating families of related (or dependent) objects but without specifying their concrete sub-classes. That means Abstract Factory lets a class returns a factory of classes.
Is Abstract Factory a factory of factories?
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 Abstract Factory pattern in Java?
The book Design Patterns: Elements of Reusable Object-Oriented Software states that an Abstract Factory “provides an interface for creating families of related or dependent objects without specifying their concrete classes”. In other words, this model allows us to create objects that follow a general pattern.
Why is factory pattern used?
Factory Method Pattern allows the sub-classes to choose the type of objects to create. It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.
Where is Abstract Factory pattern used?
The purpose of the Abstract Factory is to provide an interface for creating families of related objects, without specifying concrete classes. This pattern is found in the sheet metal stamping equipment used in the manufacture of Japanese automobiles.
What is factory pattern explain with example?
Example. The Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes.
Why is it called factory 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 problem does Abstract Factory solve?
The Abstract Factory design pattern solves problems like: How can an application be independent of how its objects are created? How can a class be independent of how the objects it requires are created? How can families of related or dependent objects be created?
What is Decorator pattern in java?
Decorator patterns allow a user to add new functionality to an existing object without altering its structure. So, there is no change to the original class. The decorator design pattern is a structural pattern, which provides a wrapper to the existing class.
What is builder class in java?
Builder is a creational design pattern, which allows constructing complex objects step by step. Unlike other creational patterns, Builder doesn't require products to have a common interface. That makes it possible to produce different products using the same construction process.
What is meant by Factory Method?
Factory method is a creational design pattern which solves the problem of creating product objects without specifying their concrete classes. The Factory Method defines a method, which should be used for creating objects instead of using a direct constructor call ( new operator).
What is the factory method pattern explain with examples?
Example. The Factory Method defines an interface for creating objects, but lets subclasses decide which classes to instantiate. Injection molding presses demonstrate this pattern. Manufacturers of plastic toys process plastic molding powder, and inject the plastic into molds of the desired shapes.
What are the types of factory pattern?
We also discussed their four different types, i.e., Singleton, Factory Method, Abstract Factory and Builder Pattern, their advantages, examples and when should we use them.
What is a Factory Method in programming?
Factory Method is a Creational Design Pattern that allows an interface or a class to create an object, but lets subclasses decide which class or object to instantiate.
What is the difference between abstract and factory methods?
The Difference Between The Two#N#The main difference between a "factory method" and an "abstract factory" is that the factory method is a method, and an abstract factory is an object. I think a lot of people get these two terms confused, and start using them interchangeably. I remember that I had a hard time finding exactly what the difference was when I learnt them.#N#Because the factory method is just a method, it can be overridden in a subclass, hence the second half of your quote:#N#... the Factory Method pattern uses inheritance and relies on a subclass to handle the desired object instantiation.#N#The quote assumes that an object is calling its own factory method here. Therefore the only thing that could change the return value would be a subclass.#N#The abstract factory is an object that has multiple factory methods on it. Looking at the first half of your quote:#N#... with the Abstract Factory pattern, a class delegates the responsibility of object instantiation to another object via composition ...#N#What they're saying is that there is an object A, who wants to make a Foo object. Instead of making the Foo object itself (e.g., with a factory method), it's going to get a different object (the abstract factory) to create the Foo object.#N#Code Examples#N#To show you the difference, here is a factory method in use:#N#class A { public void doSomething () { Foo f = makeFoo (); f.whatever (); } protected Foo makeFoo () { return new RegularFoo (); } } class B extends A { protected Foo makeFoo () { //subclass is overriding the factory method //to return something different return new SpecialFoo (); } }#N#And here is an abstract factory in use:#N#class A { private Factory factory; public A (Factory factory) { this.factory = factory; } public void doSomething () { //The concrete class of "f" depends on the concrete class //of the factory passed into the constructor. If you provide a //different factory, you get a different Foo object. Foo f = factory.makeFoo (); f.whatever (); } } interface Factory { Foo makeFoo (); Bar makeBar (); Aycufcn makeAmbiguousYetCommonlyUsedFakeClassName (); } //need to make concrete factories that implement the "Factory" interface here
What is abstract factory?
Abstract factory creates a base class with abstract methods defining methods for the objects that should be created. Each factory class which derives the base class can create their own implementation of each object type.
What is the purpose of a factory?
The purpose of a factory is to provide a objects, either to a client or itself.
What is factory method?
Factory method is just a simple method used to create objects in a class. It's usually added in the aggregate root (The Order class has a method called CreateOrderLine)
Why do we introduce the factory method?
Therefore we introduce the factory method so that the creation of the response class also is abstracted away.
Can concrete belong to more than one family?
There's nothing in the pattern that says an object can't belong to more than one family (although your use case might prohibit it). Each concrete factory is responsible for deciding which products are allowed to be created together.
Can you return multiple factory methods?
Each method does return just one product, but the creator can use multiple factory methods, they just aren't necessarily related in any particular way.
What is the difference between factory pattern and factory method?
Did you notice the difference? unlike factory pattern, factory method had two dedicated factories each specialised in doing just one thing. The actual instance is decided within the subclass. Concrete creators override the factory method to change the resulting product’s type.
Why is it called an abstract factory?
Thus abstract factory is also called as factory of factories, because it is capable of producing different kinds of instances based on the need. Also there exists an abstraction for factory.
Can you continue reading as the theoretical difference is done?
O r you can continue reading, as the theoretical difference is done, and real programmer likes code 🤓 So, let’s see each design patterns with code snippets:
Difference between Factory and Abstract Factory Design Pattern in Java
Abstract Factory and Factory design pattern are creational design pattern and use to decouple clients from creating objects they need, But there is a significant difference between Factory and Abstract Factory design patterns, Factory design pattern produces implementation of Products like Garment Factory produce different kinds of clothes, On the other hand, Abstract Factory design pattern adds another layer of abstraction over Factory Pattern and Abstract Factory implementation itself like the AbstractFactory will allow you to choose a particular Factory implementation based upon need which will then produce different kinds of products..
Difference between Abstract Factory and Factory design pattern in Java
Difference between Factory vs Abstract Factory pattern in JavaLet see another example of Abstract Factory and Factory design pattern in Java from JDK itself to get a better understanding. If you have done some XML work in Java e.g.
When to use Abstract Factory and Factory method design pattern in Java
Factory method design patterns are a modern way of creating objects. It offers some notable advantages over new () operator to create Objects e.g. By using the Factory method design pattern client is completely decoupled with object creation code, which enforces Encapsulation, and the result is a loosely coupled and highly cohesive system.
What is abstract factory?
In Abstract Factory we define an interface which will create families of related or dependent objects. In simple words, interface will expose multiple methods each of which will create some object. Again, here method return types will be generic interfaces. All this objects will together become the part of some important functionality.
What is design pattern?
Design patterns are reusable and documented solutions for commonly occurring problems in software programming or development.
Is the Factory Method pattern born from GOF?
This is one of the pattern not born from GOF and most of the peopleconsiders this as the default Factory method pattern.
What is an abstract factory pattern?
Abstract Factory design pattern is one of the Creational pattern. Abstract Factory pattern is almost similar to Factory Pattern is considered as another layer of abstraction over factory pattern. Abstract Factory patterns work around a super-factory which creates other factories.
Why is the Abstract Factory pattern important?
Because a factory encapsulates the responsibility and the process of creating product objects, it isolates clients from implementation classes. Clients manipulate instances through their abstract interfaces. Product class names are isolated in the implementation of the concrete factory; they do not appear in client code.
What is the difference between a factory method and an abstract factory?
The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. 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.
What is factory method?
The Factory Method pattern uses inheritance and relies on a subclass to handle the desired object instantiation.
What is product in concrete?
Product: Defines a product object to be created by the corresponding concrete factory and implements the AbstractProduct interface.
Why are factory patterns and builders patterns similar?
Builder Pattern and Factory pattern, both seem pretty similar to naked eyes because they both create objects for you.
Why do we use factory pattern?
It is used for complex objects creation (objects which may consists of complicated properties) While factory pattern specifies that you want to create objects of a common family and you want it to be cerated at once.
What is a builder pattern?
A builder pattern, on the other hand, is in essence a wrapper object around all the possible parameters you might want to pass into a constructor invocation. This allows you to use setter methods to slowly build up your parameter list. One additional method on a builder class is a build() method, which simply passes the builder object into the desired constructor, and returns the result.
What is the difference between builder and factory?
Goood answer, although 2 things which is worth adding is: 1) Builder is mainly used to build POJOs using Fluent API (e.g. Person.builder().withName("Sam").withAge(38).build(). 2) In my experiene, builder is useful for POJO creation for domain objects , whereas factory is useful for creating a service objects like PdfGeneratorFactory class. The service object could be cached within factory for more than 1 time use, whereas builder always creates a new object by design.
How is Builder similar to Abstract Factory?
In the case of the Abstract Factory, the client uses the factory's methods to create its own objects. In the Builder's case, the Builder class is instructed on how to create the object and then it is asked for it, but the way that the class is put together is up to the Builder class, this detail making the difference between the two patterns.
What is factory method?
A factory is simply a wrapper function around a constructor (possibly one in a different class). The key difference is that a factory method pattern requires the entire object to be built in a single method call, with all the parameters passed in on a single line. The final object will be returned.
What is the factory in the factorypattern?
In the Factorypattern, the factory is in charge of creating various subtypes of an object depending on the needs.
What is a factory pattern?
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, ...
How to tell the difference between abstract and simple factory?
The first one is a simple factory where you only have one class which acts as a factory for object creation, while in the latter you connect to an factory interface (which defines the method names) and then call the different factories that implement this interface which are supposed to have different implementations of the same method based on some criteria. For example, we have a ButtonCreationFactory interface, which is implemented by two factories, the first WindowsButtonCreationFactory (creates buttons with Windows look and feel) and the second LinuxButtonCreationFactory (creates buttons with Linux look and feel). So both these factories do have the same creation method with different implementations (algorithms). You can reference this in runtime based on the method that you type of button that you want.
What is the difference between strategy and factory?
Factory is for create multi object that has same behaviour but Strategy is for One Object that has different way to work.
What is the difference between a lot of patterns and a lot of implementations?
That is, a lot have you create an interface where perhaps there wasn't one before in your code , and then create a bunch of implementations of that interface. The difference is in their purpose and how they are used.
What are some examples of factory patterns?
In the classic example, a factory might create different types of Animals: Dog, Cat, Tiger, while a strategy pattern would perform particular actions, for example, Move; using Run, Walk, or Lope strategies. In fact the two can be used together. For example, you may have a factory that creates your business objects.
Is abstract factory the same as strategy pattern?
So, basically with abstract factory you have object creation using different strategies, which makes it very similar to the strategy pattern. However the AbstractFactory is creational, while the Strategy pattern is operational. Implementation wise, they result to be the same.
Is abstract factory creational?
However the AbstractFactory is creational, while the Strategy pattern is operational. Implementation wise, they result to be the same. Share.
