Passing complex Java Object as context through the test execution

Hello,

is it possible to store complex Java Object - e.g. in my case JMS Connection object into the SoapUI context variable(or somehow else), to pass it between tests/ steps, through the run?

I am not sure how exactly context variables works in the soapUI, is it something like a hashmap <String, AnyObject> ? Or do I get it wrong? 

Thanks, 
Vladimir.