- ~ Posted by Deepak Kamboj on September 22, 2009
The factory method pattern is a creational design pattern used in software development to encapsulate the process of creating the objects.
Concerns:
- Which object needs to be created.
- Managing the life time of the object.
- Managing the build-up and tear down concerns of the object.
Definition:
“Define an interface for creating an object, but let subclasses decide which class to instantiate”
C# Implementation of Factory method
abstract class Factory
{
//Factory Method Declaration
public abstract Product GetProduct();
}
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class concreteFactoryforProcuct1 : Factory
{
//Factory Method Implementation
public override Product GetProduct()
{
return new Product1();
}
}
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class concreteFactoryforProcuct2 : Factory
{
//Factory Method Implementation
public override Product GetProduct()
{
return new Product2();
}
}
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interface Product
{
void GetDetails();
}
class Product1 : Product
{
public void GetDetails()
{
Console.WriteLine("Product1 Details are Called");
}
}
class Product2 : Product
{
public void GetDetails()
{
Console.WriteLine("Product2 Details are called");
}
}
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protected void Page_Load(object sender, EventArgs e)
{
Factory[] objFactories = new Factory[2];
objFactories[0] = new concreteFactoryforProcuct1();
objFactories[1] = new concreteFactoryforProcuct2();
foreach (Factory objFactory in objFactories)
{
Product objProduct = objFactory.GetProduct();
objProduct.GetDetails();
}
}
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References: dofactory.com