Easiest way to convert a TableRow to JSON-formatted String, in dataflow 2.x?

Question

Short of writing my own function to do it, what is the easiest way to convert a TableRow object, inside a dataflow 2.x pipeline, to a JSON-formatted String?

I thought the code below would work, but it isn't correctly inserting quotes in between key/values, especially where there are nested fields.

public static class TableRowToString extends DoFn<TableRow, String> {    
  private static final long serialVersionUID = 1L;

  @ProcessElement
    public void processElement(ProcessContext c) {
      c.output(c.element().toString());
    }
  }
}

Answer 1

Use GSON and do a gson.toJson(yourTableRow) details here