Text text = (Text) sinkCall.getContext()[ 0 ];
StringBuilder line = (StringBuilder) sinkCall.getContext()[ 1 ];
Charset charset = (Charset) sinkCall.getContext()[ 2 ];
Iterable<String> strings = tupleEntry.asIterableOf( String.class );
line = (StringBuilder) delimitedParser.joinLine( strings, line );
text.set( line.toString().getBytes( charset ) );