import org.virbo.aggregator.AggregatingDataSourceFactory
exam= "http://jfaden.net/~jbf/autoplot/tests/fsm/2013/12/20131212.dat"
sfsm= "http://jfaden.net/~jbf/autoplot/tests/fsm/$Y/$m/$Y$m$d.dat"
fsm= org.virbo.aggregator.AggregatingDataSourceFactory.getFileStorageModel(sfsm)
delegateFile= fsm.getRepresentativeFile( monitor )
print delegateFile
print fsm.getNamesFor( DatumRangeUtil.parseTimeRange('20131201/20140101') )