Map<String, Object> parameters = new HashMap<String, Object>();
parameters.put("url", "http://soaptest.parasoft.com/calculator.wsdl");
parameters.put("namespace", "http://www.parasoft.com/wsdl/calculator/");
parameters.put("interface", "Calculator");
parameters.put("operation", "add");
parameters.put("parameters", new Float[]{9.0f, 12.0f});
ProcessInstance pi = rc.startProcess(WEB_SERVICE_WORK_ITEM_PROCESS_ID, parameters);
System.out.println(((WorkflowProcessInstance)pi).getVariable("result"));