I'm curious if i'm missing a pattern which help me with the following case:
This piece of code eventually writes data from a database to an excelsheet using Apache POI
if (o instanceof Double) {
cell.setCellValue((Double) o);
} else if (o instanceof Integer) {
cell.setCellValue((Integer) o);
} else if (o instanceof Long) {
cell.setCellValue((Long) o);
} else if (o instanceof BigDecimal) {
cell.setCellValue(((BigDecimal) o).doubleValue());
} else {
cell.setCellValue(o.toString());
}
This works like it is supposed to, but i'm looking for another solution of determening the type of the object. Now I read about using a interface here : Alternative to instanceof and if-else statements for iterating over/de-referencing a list of mixed object types
But that means I have to implement the interface in the Wrapper classes which is hard / not possible (?)
Is there another solution in this case?
Thanks in advance
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