long getEntryOffset(long ledger, long entry) throws IOException {
int offsetInPage = (int) (entry % entriesPerPage);
// find the id of the first entry of the page that has the entry
// we are looking for
long pageEntry = entry - offsetInPage;
LedgerEntryPage lep = getLedgerEntryPage(ledger, pageEntry, false);
try {
if (lep == null) {
lep = grabLedgerEntryPage(ledger, pageEntry);
}
return lep.getOffset(offsetInPage * LedgerEntryPage.getIndexEntrySize());
} finally {
if (lep != null) {
lep.releasePage();
}
}
}
