I was't so clear so I want to put it with an example. Let's suppose
your
helper class is named "Reflector". This class could be something like
this:
class Reflector {
public static T getInstance(Class<T extend Widget> class){
if (class == MyClass1.class)
return new MyClass1();
else if (class == MyClass2.class)
return new MyClass2();
else
throw new CouldntInstanceClassException();
}
}
It is type safe, although you can have a
CouldntInstanceClassException() if you forget to add the corresponding
comparison.
On 6 ago, 08:19, Fernando Barbat <[email protected]> wrote:
> You can do that on the client side. Although you don't have
> reflections, you can have a helper class which can do that work for
> you. That helper class could have a big "if, else if, else if" clause
> and compare classes using instance.getClass(). Every time you add a
> new class you want to use reflections with, you can add a new "else if
> (instance.getClass() == MyClass.class){ return new MyClass(); }"
> That was what I did when I needed to use reflections on the client
> side.
>
> On 6 ago, 05:07, Stephan T <[email protected]> wrote:
>
> > The reason why I try to do this is that GWT doesn't support
> > reflections. I'm trying to use a helper method on the server side
> > which receivs the class name, the server side then instatiates the
> > class and returns it to the client.
>
> > Any other suggestions how to solve this problem?
>
> > On 5 Aug, 15:47, Mikael Couzic <[email protected]> wrote:
>
> > > Sounds like you violated the SRP principle...
> > > If I got it right, Composite depends on the DOM, which doesn't exist
> > > server-side, so I don't think it is possible.
> > > A solution would be to encapsulate the functionnality you want to use
> > > server-side in a POJO. Your composite would then delegate to the POJO,
> > > which could be reused server-side.
> > > And if you wish to push further towards great design, embrace MVP !
>
> > > On 5 août, 14:42, Stephan T <[email protected]> wrote:
>
> > > > For several reasons I need to instansiate a Composite on the server
> > > > side that is in the client package. Is it possible? Now I think I'm
> > > > getting class not found exception when trying...
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