RE: [Java-gnome-developer] handlers as ints?

[Jeffrey M. <Jef...@Br...>]

> Hello
> 
> Checking the docs I have found that handlers are treated as java ints.
> As we know ints are fixed 32 bits in Java, I wonder what will 
> happen in
> 64bits OSes? As I see it, two solutions are posible: 1. Have a handler
> table to make the conversion, 2. Change everything to long and
> recompile.
> None of this is a good solution.
> I think using a java.awt Peer like solution works better. Hiding the
> handler in an interface that can be implemented in every platform is a
> way to work around this problem without the need to change the library
> in every platform.
> Something like:
> 
> public interface Handler {}
> 
> public class GObject {
>     public GObject(Handler handler) {
>       ...
>     }
>     ...
> }
> 
> In native code, every platform have to implement a pair of functions
> like the following:
> 
> int javaToNative(JObject * handler); // receives a Handler instance
> JObject * nativeToJava(int handler); // returns a Handler instance
> 
> probably inline functions that should be used whenever is necesary to
> access a handler.
> 
> Then you can have a OS32bitHandler with a java int field inside, and a
> OS64bitHandler with a java long field inside, and the code in
> javaToNative and nativeToJava will conditionally use one of those
> implementations depending on the arch.
> 
> What do you think?

It seems like a reasonable solution but will we not
have to change all code that passes the int handle
to use jobject instead?

-Jeff