public class FooBarMultipleTextOutputFormat
extends MultipleTextOutputFormat<NullWritable, Text> {

	protected String generateFileNameForKeyValue(NullWritable key,
										 Text value,
										 String name) {
		String line = value.toString();

		//TODO: I would like to parameterize the field that is picked
		//here. Something akin to using JobConf in Mapper.
		//i.e. instead of hard-coding [3] or [0], I would like
		//to get it from JobConf(or some other configuration) in some fashion

		String date = (line.split("\t"))[3].substring(0,10);
		String id = (line.split("\t"))[0];

		String partitionNumber = String.format("%05d", ID.getPartitionNumber(id));

		return date + "/pn_" + partitionNumber;
	}
}