🚀 go-pugleaf

In article <78gocb$p3j13@forums.borland.com>,
  "Jason Burton" <Jason.Burton@McLeodSoftware.com> wrote:
> I am curious how to implement some native methods contained in a 3rd party
> DLL.  I don't have a problem with my System.loadLibrary call, but when I go
> to call one of the methods contained in the DLL, I get an
> UnsatisfiedLinkException.  I am sure that the function calls are in the DLL,
> as I have done the same work in Delphi and C++, and I have capitalized the
> function calls correctly (not sure if this matters or not in Java).  Any
> ideas why I get UnsatisfiedLink?

I only see two possibilities. (1) You have mis-specified the function
prototype that you need. Basically you need to run javah -jni <classname> to
get the C-style header and then convert that to Delphi. (2) It can't find the
DLL specified in the loadLibrary call.

Well, probably (1) since you would probably have triple-checked (2) by now.

>
> Also, what do I need to do handle functions that take pointers as parameters
> (or return them)?

In general, you need to wrap your data as java objects and return a handle to
it. IT gets complicated because the JNI is so messy in terms of instantiating
java objects from native code and such.

I have written an object-oriented API that is designed to wrap the whole JNI
mess in a more intuitive manner. (At least it's fairly intuitive for me.)

It's free. If you want to give it a try, follow the link in my sig below.


Jonathan Revusky
--
Java and Delphi Consulting
Make your .class files double-clickable with SmartJ!
http://www.bigfoot.com/~crystalline.solutions

-----------== Posted via Deja News, The Discussion Network ==----------
http://www.dejanews.com/       Search, Read, Discuss, or Start Your Own