/**
* Get the row at the given index.
*
* @param at the index
* @return the row
*/
Row getRowAt(int at) {
Row r = rows[at];
if (r == null) {
if (firstOverflowPageId == 0) {
r = readRow(data, offsets[at], columnCount);
} else {
if (rowRef != null) {
r = rowRef.get();
if (r != null) {
return r;
}
}
PageStore store = index.getPageStore();
Data buff = store.createData();
int pageSize = store.getPageSize();
int offset = offsets[at];
buff.write(data.getBytes(), offset, pageSize - offset);
int next = firstOverflowPageId;
do {
PageDataOverflow page = index.getPageOverflow(next);
next = page.readInto(buff);
} while (next != 0);
overflowRowSize = pageSize + buff.length();
r = readRow(buff, 0, columnCount);
}
r.setKey(keys[at]);
if (firstOverflowPageId != 0) {
rowRef = new SoftReference<Row>(r);
} else {
rows[at] = r;
memoryChange(true, r);
}
}
return r;
}
