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Factory Pattern. When to use factory methods?
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444answered Mar 12, 2010 at 5:38
I like thinking about design pattens in terms of my classes being 'people,' and the patterns are the ways that the people talk to each other.
So, to me the factory pattern is like a hiring agency. You've got someone that will need a variable number o...

public interface IThingFactory
{
Thing GetThing(string theString);
}

public class ThingFactory : IThingFactory
{
public Thing GetThing(string theString)
{
return new Thing(theString, firstDependency, secondDependency);
}
}
So, now the consumer of the ThingFactory can get a Thing, without having to know about ...
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https://stackoverflow.com/questions/69849
Factory Pattern. When to use factory methods? - Stack Overflow
WEBJun 3, 2016 · The stated purpose of the Factory Patterns is: Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.
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Class Factory
Factory Pattern
I like thinking about design pattens in terms of my classes being 'people,' and the patterns are the ways that the people talk to each other. So, t...
Best answer
·
444
Factory methods should be considered as an alternative to constructors - mostly when constructors aren't expressive enough, ie. class Foo{ public...
123
One situation where I personally find separate Factory classes to make sense is when the final object you are trying to create relies on several ot...
94
It is good idea to use factory methods inside object when: Object's class doesn't know what exact sub-classes it have to create Object's class is...
23
They're also useful when you need several "constructors" with the same parameter type but with different behavior.
19
It is important to clearly differentiate the idea behind using factory or factory method. Both are meant to address mutually exclusive different ki...
19
Problem statement: Create a Factory of Games by using Factory Methods, which defines the game interface. Code snippet: import java.util.HashMap;...
17
It's really a matter of taste. Factory classes can be abstracted/interfaced away as necessary, whereas factory methods are lighter weight (and also...
6
Factory classes are useful for when the object type that they return has a private constructor, when different factory classes set different proper...
4
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What exactly is a Class Factory? - Stack Overflow
WEBAug 14, 2014 · In the strictest sense a Class Factory is a function or method that creates or selects a class and returns it, based on some condition determined from input …
Here's some supplemental information that may help better understand several of the other shorter, although technically correct, answers. In the s...
34
A class factory constructs instances of other classes. Typically, the classes they create share a common base class or interface, but derived class...
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21
A class factory is a method which (according to some parameters for example) returns you a customised class (not instantiated!).
7
The Wikipedia article gives a pretty good definition: http://en.wikipedia.org/wiki/Factory_pattern. But probably the most authoritative definition...
3
I felt that this explains it pretty well (for me, anyway). Class factories are used in the factory design pattern, I think. Like other creational...
2
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WEBMay 14, 2013 · Use the Factory Method pattern when. · a class can't anticipate the class of objects it must create. · a class wants its subclasses to specify the objects it creates. · …
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Factory Class Pattern
Object-oriented Design Patterns
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People also ask
What is a factory method?Factory Method: Define an interface for creating an object, but let subclasses decide which class to instantiate. The Factory method lets a class defer instantiation it uses to subclasses." (Gang Of Four) Use case: When to use: Client doesn't know which concrete classes it will be required to create the object at runtime.
Factory Pattern. When to use factory methods? - Stack Overflow
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When is a factory class useful?Factory classes are useful when you need a complicated process for constructing the object, when the construction need a dependency that you do not want for the actual class, when you need to construct different objects etc. Where is the Factory class here? @KorayTugay: There is no factory class, only factory methods.
Factory Pattern. When to use factory methods? - Stack Overflow
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Why do we need a 'factory'?Abstract Factories are great for supporting multiple platforms while keeping your code-base unified. Suppose you have a large Qt or GTK+ or .NET/Mono program that you want to run on Windows, Linux, and OSX. But you have a feature that is implemented in a different way on each platform (perhaps via the kernel32 API or a POSIX feature).
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When should I use a factory method?A factory method is most useful when you don't know precisely what class will be returned. You may, eg, get a different class based on whether an accessed resource is local or remote. Another case is where the the object being returned is a "composite".
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