protected void _handleFirstLine() throws IOException {
_handleFirstLine = false;
if (_schema.usesHeader()) {
int count = _schema.size();
if (count == 0) {
_reportMappingError(
"Schema specified that header line is to be written; but contains no column names");
}
for (CsvSchema.Column column : _schema) {
_writer.writeColumnName(column.getName());
}
_writer.endRow();
}
}
