How do you create Static Factories?

Question

I have a series of Factory objects I wish to expose trough a "root" utility (object). This root utility is in-and-of itself...a factory. As a utility object, I wish to implement it as a static class. However, isn't possible using my current design...as you cannot implement static members in an interface.

So...

MY QUESTION IS: How can I alter the classes below to get the static factory affect above?

THE CODE LOOKS LIKE:

public interface IFactory
{
    I Create<I>();

    IFactoryTransform Transformer { get; }
    IFactoryDataAccess DataAccessor { get; }
    IFactoryValidator Validator { get; }
}

public static class Factory : IFactory
{
    static Factory()
    {

        Transformer = new FactoryTransform();
        DataAccessor = new FactoryDataAccess();
        Validator = new FactoryValidator();
    }

    public I Create<I>()
    {
        var model = typeof(I);

        // Activation code will go here...

        throw new NotSupportedException("Type " + model.FullName + " is not supported.");
    }

    public IFactoryDataAccess DataAccessor { get; private set; }
    public IFactoryTransform Transformer { get; private set; }
    public IFactoryValidator Validator { get; private set; }
}

Answer 1

You can move your static keyword from Factory class to one level up. For example you can have a static class Utils, where you have a singleton property MyFactory.

public static class Utils
{
    public static IFactory MyFactory {get; private set}
    static Utils()
    {  
        MyFactory = new Factory();
    }
}

//usage
var myInterface = Utils.MyFactory.Create<IMyInterfrace>()

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That said, I would probably use DI instead of the factories and IoC container to manage lifetime of the objects.