Using Variant [] with Jawin

Hey guys, I have just started using Jawin and this is the stub that has
been generated,

public int BuildTree(Variant[] query_words,Variant[] paragraphs,int lang)
throws COMException
{

  return ((Integer)invokeN("BuildTree", new Object[]
{query_words, paragraphs, new Integer(lang)})).intValue();

}

I try to call BuildTree using the following code,

Variant searchterms [] = new Variant [1];
searchterms [0] = new Variant ();
searchterms [0].bstrVal = "AJ";

Variant searchdesc [] = new Variant [1];
searchdesc [0] = new Variant ();
searchdesc [0].bstrVal = "AJ is cool";

clusterobj.BuildTree(searchterms, searchdesc, 50);

I am new to this, so please bear with me if I sound ignorant. I've tried
to search my best, but I get the following error from the COM component,

SafeArray not implemented. How do I declare or pass a variant (that has to
be a arrray of strings) as a safearray i.e. in the COM component
searchterms needs to be an array of strings and passed as safearrays?

Thanks

AJ