Use JNA to CreateObject of a COM object I have no .class for

Question

I have seen examples like this

MsWordApp comObj = this.factory.createObject(MsWordApp.class);

in other questions here on SO.

My problem is that I need to create an object like it is done in a vbscript example:

Set tdc = CreateObject("TDApiOle80.TDConnection")

In this Scenario the createObject would need to process a String, not a class. How can I translate this vbscript to Java / JNA ?

Java can't create an object it doesn't know, so if you don't have .class, then you can not create the object — Lino
– Lino, Commented Oct 27, 2017 at 11:04
You could perhaps generate some Java class source codes and compile on the fly. — Vlasec
– Vlasec, Commented Oct 27, 2017 at 11:10

acelent · Accepted Answer · 2017-10-27 14:45:20Z

2

VBScript's CreateObject is essentially CLSIDFromProgID followed by CoCreateInstance, with error handling.

VBScript always uses late binding, so you're interested in IDispatch support.

It seems JNA provides this through COMBindingBaseObject:

new COMBindingBaseObject("TDApiOle80.TDConnection", false)

Then, use the provided IDispatch to invoke methods and get or set properties.

answered Oct 27, 2017 at 14:45

acelent

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