/// <summary>
/// Logically splits the set of input files for the job, splits N lines
/// of the input as one split.
/// </summary>
/// <seealso cref="Org.Apache.Hadoop.Mapred.FileInputFormat{K, V}.GetSplits(Org.Apache.Hadoop.Mapred.JobConf, int)
/// "/>
/// <exception cref="System.IO.IOException"/>
public override InputSplit[] GetSplits(JobConf job, int numSplits)
{
AList <FileSplit> splits = new AList <FileSplit>();
foreach (FileStatus status in ListStatus(job))
{
foreach (FileSplit split in NLineInputFormat.GetSplitsForFile(status, job, N))
{
splits.AddItem(new FileSplit(split));
}
}
return(Sharpen.Collections.ToArray(splits, new FileSplit[splits.Count]));
}
// A reporter that does nothing
/// <exception cref="System.IO.IOException"/>
internal virtual void CheckFormat(JobConf job, int expectedN)
{
NLineInputFormat format = new NLineInputFormat();
format.Configure(job);
int ignoredNumSplits = 1;
InputSplit[] splits = format.GetSplits(job, ignoredNumSplits);
// check all splits except last one
int count = 0;
for (int j = 0; j < splits.Length - 1; j++)
{
NUnit.Framework.Assert.AreEqual("There are no split locations", 0, splits[j].GetLocations
().Length);
RecordReader <LongWritable, Text> reader = format.GetRecordReader(splits[j], job,
voidReporter);
Type readerClass = reader.GetType();
NUnit.Framework.Assert.AreEqual("reader class is LineRecordReader.", typeof(LineRecordReader
), readerClass);
LongWritable key = reader.CreateKey();
Type keyClass = key.GetType();
NUnit.Framework.Assert.AreEqual("Key class is LongWritable.", typeof(LongWritable
), keyClass);
Text value = reader.CreateValue();
Type valueClass = value.GetType();
NUnit.Framework.Assert.AreEqual("Value class is Text.", typeof(Text), valueClass);
try
{
count = 0;
while (reader.Next(key, value))
{
count++;
}
}
finally
{
reader.Close();
}
NUnit.Framework.Assert.AreEqual("number of lines in split is " + expectedN, expectedN
, count);
}
}
