bool NewChromSweep::chromChange(int dbIdx, RecordKeyVector &retList, bool wantScan)
{
const Record *dbRec = _currDbRecs[dbIdx];
if (_currQueryRec != NULL && _currQueryChromName != _prevQueryChromName) {
_context->testNameConventions(_currQueryRec);
testChromOrder(_currQueryRec);
}
if (dbRec != NULL) {
_context->testNameConventions(dbRec);
testChromOrder(dbRec);
}
// If the query rec and db rec are on the same chrom, stop.
if (dbRec != NULL && _currQueryRec != NULL && _currQueryRec->sameChrom(dbRec)) return false;
if (dbRec == NULL || _currQueryRec == NULL) return false;
if (queryChromAfterDbRec(dbRec)) {
// the query is ahead of the database. fast-forward the database to catch-up.
QuickString oldDbChrom(dbRec->getChrName());
while (dbRec != NULL &&
queryChromAfterDbRec(dbRec)) {
_dbFRMs[dbIdx]->deleteRecord(dbRec);
if (!nextRecord(false, dbIdx)) break;
dbRec = _currDbRecs[dbIdx];
const QuickString &newDbChrom = dbRec->getChrName();
if (newDbChrom != oldDbChrom) {
testChromOrder(dbRec);
oldDbChrom = newDbChrom;
}
}
clearCache(dbIdx);
return false;
} else {
// the database is ahead of the query.
// scan the cache for remaining hits on the query's current chrom.
if (wantScan) scanCache(dbIdx, retList);
return true;
}
}
bool CloseSweep::chromChange(int dbIdx, RecordKeyVector &retList, bool wantScan)
{
Record *dbRec = _currDbRecs[dbIdx];
bool haveQuery = _currQueryRec != NULL;
bool haveDB = dbRec != NULL;
if (haveQuery && _currQueryChromName != _prevQueryChromName) {
_context->testNameConventions(_currQueryRec);
testChromOrder(_currQueryRec);
}
if (haveDB) {
_context->testNameConventions(dbRec);
testChromOrder(dbRec);
}
// the files are on the same chrom
if (haveQuery && (!haveDB || _currQueryRec->sameChrom(dbRec))) {
//if this is the first time the query's chrom is ahead of the chrom that was in this cache,
//then we have to clear the cache.
if (!_caches[dbIdx].empty() && queryChromAfterDbRec(_caches[dbIdx].begin()->value())) {
clearCache(dbIdx);
clearClosestEndPos(dbIdx);
}
return false;
}
if (!haveQuery || !haveDB) return false;
if (!_caches[dbIdx].empty() && (_caches[dbIdx].begin()->value()->sameChrom(_currQueryRec))) {
//the newest DB record's chrom is ahead of the query, but the cache still
//has old records on that query's chrom
scanCache(dbIdx, retList);
finalizeSelections(dbIdx, retList);
return true;
}
// the query is ahead of the database. fast-forward the database to catch-up.
if (queryChromAfterDbRec(dbRec)) {
string oldDbChrom(dbRec->getChrName());
while (dbRec != NULL &&
queryChromAfterDbRec(dbRec)) {
_dbFRMs[dbIdx]->deleteRecord(dbRec);
if (!nextRecord(false, dbIdx)) break;
dbRec = _currDbRecs[dbIdx];
const string &newDbChrom = dbRec->getChrName();
if (newDbChrom != oldDbChrom) {
testChromOrder(dbRec);
oldDbChrom = newDbChrom;
}
}
clearCache(dbIdx);
clearClosestEndPos(dbIdx);
return false;
}
// the database is ahead of the query.
else {
// 1. scan the cache for remaining hits on the query's current chrom.
if (wantScan) scanCache(dbIdx, retList);
return true;
}
//control can't reach here, but compiler still wants a return statement.
return true;
}