Spring 3.1.2 RowMapper parameterization

Question

I'm developing a web application using Spring 3.1.2, and need to create a custom row mapper. I have created a private static final class which implements RowMapper, but i'm getting the error message "The type RowMapper is not generic; it cannot be parameterized with arguments ".

All Spring related jars in my lib folder are of 3.1.2.RELEASE version. I have been unable to find anything of the sort elsewhere. Any ideas why this might be happening?

Thanks.

Here is the sample code:

public class OutPatient extends Patient{
     @Pattern(regexp="[0-9]+", message="OPD No. should only contain digits.")
String opdNo;

public String getOpdNo() {
    return opdNo;
}

public void setOpdNo(String opdNo) {
    this.opdNo = opdNo;
}
}

DAO Class:

 @Repository("dbHelper")
 public class DBHelperImpl{
private JdbcTemplate jdbcTemplate;
private NamedParameterJdbcTemplate namedParameterJdbcTemplate;

@Autowired
public void setDataSource(DataSource dataSource) {
    this.jdbcTemplate = new JdbcTemplate(dataSource);
    this.namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
}

     public List<OutPatient> fetchOutPatients() {
    String sql = "SELECT  OPDNO as opdNo FROM `test`.`out_patient`";

    @SuppressWarnings("unchecked")  //Have to add this annotation to prevent warning
    List<OutPatient> outPatients = jdbcTemplate.query(sql, new OutPatientRowMapper());
    return outPatients;     

}

     private static final class OutPatientRowMapper implements RowMapper{  //Unable to add <OutPatient> generics here!      
    public OutPatient mapRow(ResultSet rs, int rowNum) throws SQLException {
        OutPatient outPatient = new OutPatient();           
        outPatient.setOpdNo(rs.getString("opdNo"));
                       return outPatient;
              }
     }

Answer 1

I had this same kind of issue, Eclipse warning me about RowMapper not being generic.

So I wrote the import by hand:

import org.springframework.jdbc.core.RowMapper;

Which produced this error: The import org.springframework.jdbc.core.RowMapper collides with another import statement

So I looked at my other import statements and what do I find lurking in my Spring project:

import javax.swing.tree.RowMapper;

...I deleted that import and then everything worked as it should.

Answer 2

It should be something like this

List<Bank> list = t.query(sql, args, new RowMapper<Bank>() {
    @Override
    public Bank mapRow(ResultSet rs, int rowNum) throws SQLException {
        Bank t = new Bank();
        t.setName(rs.getString("name"));
        return t;
    }
});

This code also compiles without warnings

   private static final class OutPatientRowMapper implements
            RowMapper<OutPatient> {
        public OutPatient mapRow(ResultSet rs, int rowNum) throws SQLException {
            OutPatient outPatient = new OutPatient();
            outPatient.setOpdNo(rs.getString("opdNo"));
            return outPatient;
        }
    }