/**
* Invoke the current tool.
*/
private void invokeCurrentImpl () {
ExtImplementationLocal impl = (ExtImplementationLocal)
getPaActImpl()[Math.abs(getPaExecStat().intValue()) - 1];
impl.invoke (toActivityLocal());
if (impl instanceof ProcBasedImpl) {
String key = ((ProcBasedImpl)impl).processKey ();
setPaSubflow (key);
}
}