/* Similar to readFile(), tests the scanner created
* by record numbers rather than the offsets.
*/
/// <exception cref="System.IO.IOException"/>
internal virtual void ReadRowSplits(int numSplits)
{
TFile.Reader reader = new TFile.Reader(fs.Open(path), fs.GetFileStatus(path).GetLen
(), conf);
long totalRecords = reader.GetEntryCount();
for (int i = 0; i < numSplits; i++)
{
long startRec = i * totalRecords / numSplits;
long endRec = (i + 1) * totalRecords / numSplits;
if (i == numSplits - 1)
{
endRec = totalRecords;
}
TFile.Reader.Scanner scanner = reader.CreateScannerByRecordNum(startRec, endRec);
int count = 0;
BytesWritable key = new BytesWritable();
BytesWritable value = new BytesWritable();
long x = startRec;
while (!scanner.AtEnd())
{
Assert.Equal("Incorrect RecNum returned by scanner", scanner.GetRecordNum
(), x);
scanner.Entry().Get(key, value);
++count;
Assert.Equal("Incorrect RecNum returned by scanner", scanner.GetRecordNum
(), x);
scanner.Advance();
++x;
}
scanner.Close();
Assert.True(count == (endRec - startRec));
}
// make sure specifying range at the end gives zero records.
TFile.Reader.Scanner scanner_1 = reader.CreateScannerByRecordNum(totalRecords, -1
);
Assert.True(scanner_1.AtEnd());
}
