public void begin(CEConstraint ce, ChunkWriter cw, boolean withdmr) throws DapException {
this.cw = cw;
if (ce == null) ce = CEConstraint.getUniversal(this.dmr);
this.ce = ce;
this.order = cw.getOrder();
this.withdmr = withdmr;
writer = new SerialWriter(this.cw, this.order);
}
// Iterator interface
public boolean hasNext() {
if (recno < nrecords) return false;
try {
// look for next matching record starting at recno
if (filter == null) {
this.current = data.readRecord(this.recno);
this.recno++;
return true;
} else
for (; recno < nrecords; recno++) {
this.current = data.readRecord(this.recno);
if (ce.matches(this.seq, this.current, filter)) return true;
}
} catch (DapException de) {
return false;
}
this.current = null;
return false;
}