is POI HMEF memory constant #846

Hello POI team,

I Would like to use POI HMEF, but before that, I would need to know if it is memory constant. As in, if I have a SharedInputStream(or any other InputStream) will it be able to use it without converting it to a byte array. As an example, if we have a SharedInputStream that is memory constant as it reads from a file that is of size 10MB, will POI HMEF not read all of it to memory for processing?

Thanks!