Re: News for Java?

Arne Vajh??j wrote:


Factories can set immutable public state for their clients. They control
the constructors, hiding them from the outside, so their use is
compatible with setting state in constructors of the hidden
implementation classes.

public interface Fooster
{
public Condition getInitialCondition();
public void foo();
}

public class FoosterFactory
{
public static Fooster produce( Condition condition )
{
return new FoosterImpl( condition );
}
}

public class Client
{
public void doSomething()
{
Condition condition = createInitialCondition();
Fooster fooster = FoosterFactory.produce( condition );
fooster.foo();
}
}