Unable to define param with expression in main composite

[Golfer474]

In traditional Streams applications the SPL definition allows for parameters in the main composite to be defined using an expression. The expression can refer to a Java defined function ("init" in the example below) that is evaluated at runtime during the application initialization. It does not appear that this functionality is available in the streamsx.topology Java API . Is there a workaround or another way to achieve this using the API ?

namespace myApplication ;
use com.myapplication.configuration::* ;
composite myApplication
{
    param
        expression<rstring> $config : init(getSubmissionTimeValue("param1", ""), getSubmissionTimeValue("param1", "")) ;
    graph
        ...
}

[markheger]

currently not supported, there is no workaround for topology API.