BiTSet storage and comparaison

[schneider jean-marie]

Hello !

I would like to store into MySQL BitSet objects. I am able to only use a string to do that :

BitSet subBS = new BitSet();
String strSubSet = "";
subBS = Fingerprinter.getFingerprint(mol, 2048, 6);
strSubSet = subBS.toString();

This string could be verry big comparred to the object itself (more than 5 ko).
Is it possible to be more efficient to store this BitSet into MySQL ?
One solution is to store the binary string (0010110...), which could have a lower weight than the strSubSet. But I don't kown how to obtaine it .

The second point is that I have to compare the stored BitSet (10000 or more) with one BitSet submited by somebody. What is the best way to say that subBitSet is a subset of the stored BitSet number 10, ex :
BitSet : 00010100110
submit : 00010000100

here submit is a subset of BitSet. The way I use is :

BitSet clone = (BitSet) bs1.clone();
clone.and(bs2);
if (clone.equals(bs2))
{
return true;
}
return false;  

But that work only with the BitSet which I am not able to store in MySQL.

Any comment would be appreciated,
Jean-Marie