code: public void writeOutput(DataPipe cr) {
          try {
              context.write(NullWritable.get(), new Text(cr.getPipeDelimited(outTemplate)));
          } catch (Exception e) {
              throw new RuntimeException("Exception occurred while writing to Context", e);
          }
      }
docs: Write to a context. Uses NullWritable for key so that only value of output string is ultimately written
  
  @param cr the DataPipe to write to