@SuppressWarnings("unchecked")
public DelegatingRecordReader(InputSplit split, TaskAttemptContext context)
throws IOException, InterruptedException {
// Find the InputFormat and then the RecordReader from the TaggedInputSplit.
TaggedInputSplit taggedInputSplit = (TaggedInputSplit) split;
InputFormat<K, V> inputFormat =
(InputFormat<K, V>)
ReflectionUtils.newInstance(
taggedInputSplit.getInputFormatClass(), context.getConfiguration());
originalRR = inputFormat.createRecordReader(taggedInputSplit.getInputSplit(), context);
}