// force construction with make static methods
/** used for when the ocrrence time will be set later; so should not be called from externally but through another Stamp constructor */
private Stamp(EnumTense tense, long serial)
{
dualStamp = new DualStamp(Parameters.STAMP_NUMBEROFELEMENTS, Parameters.STAMP_BLOOMFILTERNUMBEROFBITS);
dualStamp.insertAtFront(new List <uint> {
// HACK< stamps must store long !!! >
(uint)serial
});
this.tense = tense;
}
public static DualStamp zip(DualStamp a, DualStamp b)
{
DualStamp result = new DualStamp(a.numberOfElements, a.bloomfilter.numberOfBits);
uint newUsed = Math.Min((uint)(a.privateUsed + b.privateUsed), (uint)a.numberOfElements);
int ai = 0, bi = 0;
IList <uint> zipped = new List <uint>();
// zip
for (;; ai++, bi++)
{
if (ai == a.used || bi == b.used)
{
break;
}
zipped.Add(a.accessTermIdHistory(ai));
zipped.Add(b.accessTermIdHistory(bi));
}
// remainder
for (;; ai++)
{
if (ai == a.used)
{
break;
}
zipped.Add(a.accessTermIdHistory(ai));
}
for (; ; bi++)
{
if (bi == b.used)
{
break;
}
zipped.Add(b.accessTermIdHistory(bi));
}
result.insertAtFront(zipped);
result.recalcBloomfilter(newUsed);
return(result);
}