private static TestCombineTextInputFormat.Range[] CreateRanges(int length, int numFiles
, Random random)
{
// generate a number of files with various lengths
TestCombineTextInputFormat.Range[] ranges = new TestCombineTextInputFormat.Range[
numFiles];
for (int i = 0; i < numFiles; i++)
{
int start = i == 0 ? 0 : ranges[i - 1].end;
int end = i == numFiles - 1 ? length : (length / numFiles) * (2 * i + 1) / 2 + random
.Next(length / numFiles) + 1;
ranges[i] = new TestCombineTextInputFormat.Range(start, end);
}
return(ranges);
}
/// <exception cref="System.IO.IOException"/>
private static void CreateFiles(int length, int numFiles, Random random)
{
TestCombineTextInputFormat.Range[] ranges = CreateRanges(length, numFiles, random
);
for (int i = 0; i < numFiles; i++)
{
Path file = new Path(workDir, "test_" + i + ".txt");
TextWriter writer = new OutputStreamWriter(localFs.Create(file));
TestCombineTextInputFormat.Range range = ranges[i];
try
{
for (int j = range.start; j < range.end; j++)
{
writer.Write(Sharpen.Extensions.ToString(j));
writer.Write("\n");
}
}
finally
{
writer.Close();
}
}
}
