/// <summary>
/// Combine InputSplits from child InputFormats into a
/// <see cref="CompositeInputSplit"/>
/// .
/// </summary>
/// <exception cref="System.IO.IOException"/>
public override InputSplit[] GetSplits(JobConf job, int numSplits)
{
InputSplit[][] splits = new InputSplit[kids.Count][];
for (int i = 0; i < kids.Count; ++i)
{
InputSplit[] tmp = kids[i].GetSplits(job, numSplits);
if (null == tmp)
{
throw new IOException("Error gathering splits from child RReader");
}
if (i > 0 && splits[i - 1].Length != tmp.Length)
{
throw new IOException("Inconsistent split cardinality from child " + i + " (" + splits
[i - 1].Length + "/" + tmp.Length + ")");
}
splits[i] = tmp;
}
int size = splits[0].Length;
CompositeInputSplit[] ret = new CompositeInputSplit[size];
for (int i_1 = 0; i_1 < size; ++i_1)
{
ret[i_1] = new CompositeInputSplit(splits.Length);
for (int j = 0; j < splits.Length; ++j)
{
ret[i_1].Add(splits[j][i_1]);
}
}
return(ret);
}
/// <exception cref="System.IO.IOException"/>
public override ComposableRecordReader GetRecordReader(InputSplit split, JobConf
job, Reporter reporter)
{
// child types unknowable
if (!(split is CompositeInputSplit))
{
throw new IOException("Invalid split type:" + split.GetType().FullName);
}
CompositeInputSplit spl = (CompositeInputSplit)split;
int capacity = kids.Count;
CompositeRecordReader ret = null;
try
{
if (!rrCstrMap.Contains(ident))
{
throw new IOException("No RecordReader for " + ident);
}
ret = (CompositeRecordReader)rrCstrMap[ident].NewInstance(id, job, capacity, cmpcl
);
}
catch (MemberAccessException e)
{
throw (IOException)Sharpen.Extensions.InitCause(new IOException(), e);
}
catch (InstantiationException e)
{
throw (IOException)Sharpen.Extensions.InitCause(new IOException(), e);
}
catch (TargetInvocationException e)
{
throw (IOException)Sharpen.Extensions.InitCause(new IOException(), e);
}
for (int i = 0; i < capacity; ++i)
{
ret.Add(kids[i].GetRecordReader(spl.Get(i), job, reporter));
}
return((ComposableRecordReader)ret);
}