I have a class and I would like to restrict its instantiation to only one Factory class, how can I prevent this object from instantiation by the new operator?
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I have a class and I would like to restrict its instantiation to only one Factory class, how can I prevent this object from instantiation by the new operator?
Make all the constructors package private; have a single Factory object in that same package that owns the public creation method for clients outside the package.
It’s easy to do with a single class, but I’m imagining that you’d like that Factory to be virtual: able to create several implementations of a single interface or abstract class.