General question on Java/COM bridging
A general question that I hope Windows Java developers can answer for me...
A company develops and sells a commercial ActiveX component for Windows. In the Java world, is it the Java developer that takes care of integrating the component into their app, using a JNI wrapper creation tool of their choice (eg. Java2com, Jacob, JacoZoom, etc.)? Or is it down to the company itself to supply a JNI wrapper?
Thanks in advance (and please excuse my ignorance!)
[474 byte] By [
calzakka] at [2007-11-26 14:51:07]
# 1
To write JNI code for integrating of an activeX is not a simple task. You will face with a number of problems related to COM:
- when and where to call CoInitialize and CoUninitialize,
- how to clean up COM references on Java Application exit,
- when to do Thread Marshal and when it is not needed for COM interfaces;
- how to Marshal and Unmarshal COM parameters in Java methods calls to COM Interface methods, etc.
The best decision is to use some Java-COM Bridge.
My company has developed tools like
- Java-COM Bridge
- Object-Oriented JNI SDKs for C++ and .NET (v1.1,v.2.0) languages (do not mix with JNI wrapper generators). These are an object-oriented maps of the regular JNI SDK,
- Add-Ins for MS Visual Studio v.6.0 and v.7.1 that generate Java wrappers in C++, C#, J#, MCpp, VB for Object-Oriented JNI SDK.
So we know problems you have.
See our site
http://www.javain.com
# 2
> A company develops and sells a commercial ActiveX
> component for Windows. In the Java world, is it the
> Java developer that takes care of integrating the
> component into their app, using a JNI wrapper
> creation tool of their choice (eg. Java2com, Jacob,
> JacoZoom, etc.)? Or is it down to the company itself
> to supply a JNI wrapper?
I suppose it could go either way
