String combinedColumnName = request.getParameter("combinedColumnName");
if (combinedColumnName != null) {
boolean prependColumnName = Boolean.parseBoolean(request.getParameter("prependColumnName"));
String separator = request.getParameter("separator");
op = new TransposeColumnsIntoRowsOperation(
startColumnName, columnCount,
ignoreBlankCells, fillDown,
combinedColumnName, prependColumnName, separator);
} else {
String keyColumnName = request.getParameter("keyColumnName");
String valueColumnName = request.getParameter("valueColumnName");
op = new TransposeColumnsIntoRowsOperation(
startColumnName, columnCount,
ignoreBlankCells, fillDown,
keyColumnName, valueColumnName);
}