Re: Calling Java Methods from Ada

[Geoff Bull <mbit@acenet.com.au>]

See http://www.acenet.com.au/~gbull/

The Alchemist (none@none.com) wrote:
>         A group of us are trying to write a Java GUI to interface to some Ada 
> APIs for a class project. We've spent several weeks trying to get this 
> to work. We initially started with CORBA, but couldn't get Adabroker 
> working easily.
>         We then tried to go with JNI which lets us call Ada functions. However, 
> we need to register callback functions to the pre-existing Ada APIs (to 
> receive events coming from existing Ada infrastructure that will then 
> call Java methods to update GUI components). Our callback functions 
> would like to call Java code, but this doesn't seem possible with a JNI 
> connection (JNI needs a reference to a JNIENV that it only gets when 
> Java calls a JNI method).
>         Is there any way to call Java methods from Ada? Similar to the JNI method 
> for calling Ada from Java? Or do you think we will need to go with an 
> intermediary technology like CORBA or SOAP?
>         Your help would be greatly appreciated as we have spent many hours trying 
> to figure this one out. Our project's success depends on it!
>