Mulitple column name in spring data - spring

Question

Model
#Column(name="Desc", name="des", name="DS")
private String description;
How can I mention multiple name of column ? so, that if any one found it map value to description?

Answer 1

How can I mention multiple name of column ?
You can't. A database does not allow columns to have multiple names, hence you can't map multiple column names to a class field.
so, that if any one found it map value to description?
If you have multiple stored procedures that return in their respective result set "Desc", "des", "ds" and you need to map this to the same Java class - you need to define different row mappers and describe the mapping there.
For example let's say you have SP1 and SP2 and you want both result sets from those to be mapped to ResultDto.
ResultDto looks like:
public class ResultDto {
private String name; //always maps to DB column "name"
private String desc; //maps to different DB columns - "ds", "desc"
//ommitted..
}
You can define a base row mapper and define the mapping for all overlapping fields of all Stored Procs result sets.
Code Example:
protected static abstract class BaseRowMapper implements RowMapper<ResultDto> {
public abstract ResultDto mapRow(ResultSet rs, int rowNum) throws SQLException;
protected void mapBase(ResultSet rs, ResultDto resultDto) throws SQLException {
resultDto.setName(rs.getString("name")); //map all overlapping fields/columns here
}
}
private static class SP1RowMapper extends BaseRowMapper {
#Override
public ResultDto mapRow(ResultSet rs, int rowNum) throws SQLException {
ResultDto resultDto = new ResultDto();
mapBase(rs, resultDto);
resultDto.setDescription(rs.getString("ds"));
return resultDto;
}
}
private static class SP2RowMapper extends BaseRowMapper {
#Override
public ResultDto mapRow(ResultSet rs, int rowNum) throws SQLException {
ResultDto resultDto = new ResultDto();
mapBase(rs, resultDto);
resultDto.setDescription(rs.getString("desc"));
return resultDto;
}
}
I don't know how you call the Stored Procedures, but if you use Spring's SimpleJdbcCall, the code will look like:
new SimpleJdbcCall(datasource)
.withProcedureName("SP NAME")
.declareParameters(
//Stored Proc params
)
.returningResultSet("result set id", rowMapperInstance);