Re: Lushous - Lush/Java Initiative

Hi Ralf,

> I think it would be nice to be able to use existing Java code
> in a Lush program. What's your idea, how are you going to make
> this work?

Well, this is actually not that difficult, at least for gcc-java. Using gcc-java and 
its related utilities, java code can be compiled to binaries and a Lush interface
made as usual. gcc-java already has its own implementation of the core java libraries
pre-compiled. So only the interface for that will be needed. It would be nice to
auto-generate interfaces, which I imagine will be simpler than doing the same
for C/C++.

For Sun Java it will be a different story. Either the use of JNI (Java Native Interface)
or recompilation of the Sun code with gcc-java will be needed. That's a big job and
it will probably be better to just develop a scripting frontend to Java for that (Sun's
1.6 version is to be scriptable and there are already a few languages being offered
for that).

Initially only a subset of Java code will be useable, due in part to gcc-java not
having up-to-date support for Sun's version and specific libraries being implemented
differently (Gtk+ for GUI instead of Swing, etc.). This will change in future once
Sun makes Java open source.

Apart from that basic approach I want to have similar functionality as CLush to
inline Java code, compile, and run in standard Lush. This should be simpler than 
CLush due to the simpler nature of Java as a language. I will just start with the
CLush code as a guide.

Still in the very initial stages of planning. I have to do some testing with gcc-java
generated binaries and Lush to see where there are potential difficulties. As it
stands, Lush can already load any of the gcc-java libraries as long as all the
system requirements are met. It is no different than loading any C binary.

Raymond
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