LogicalOutput lo = outputs.values().iterator().next();
if (! (lo instanceof MROutput)) {
throw new IllegalStateException("FilterByWordOutputProcessor processor can only work with MROutput");
}
ShuffledUnorderedKVInput kvInput = (ShuffledUnorderedKVInput) li;
MROutput mrOutput = (MROutput) lo;
KeyValueReader kvReader = kvInput.getReader();
KeyValueWriter kvWriter = mrOutput.getWriter();
while (kvReader.next()) {
Object key = kvReader.getCurrentKey();
Object value = kvReader.getCurrentValue();