@Override
    public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
        // Validate column count.
        ResultSetMetaData rsmd = rs.getMetaData();
        int nrOfColumns = rsmd.getColumnCount();
        if (nrOfColumns == 0) {
            throw new SQLException("Returned no columns!");
        } else if (nrOfColumns != 1) {
            throw new SQLException("Returned too many columns: "+ nrOfColumns);
        }

        // Extract column value from JDBC ResultSet
        Object result = getColumnValue(rs, 1, this.requiredType);
        if ((result != null) && (this.requiredType != null) && !this.requiredType.isInstance(result)) {
            // Extracted value does not match already: try to convert it.
            try {
                return convertValueToRequiredType(result, this.requiredType);
            }
            catch (IllegalArgumentException ex) {
                throw new SQLException(
                        "Type mismatch affecting row number " + rowNum + " and column type '" +
                                rsmd.getColumnTypeName(1) + "': " + ex.getMessage());
            }
        }
        return result;
    }
@Override
    public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
        
        ResultSetMetaData rsmd = rs.getMetaData();
        int nrOfColumns = rsmd.getColumnCount();
        if (nrOfColumns == 0) {
            throw new SQLException("Returned no columns!");
        } else if (nrOfColumns != 1) {
            throw new SQLException("Returned too many columns: "+ nrOfColumns);
        }

        
        Object result = getColumnValue(rs, 1, this.requiredType);
        if ((result != null) && (this.requiredType != null) && !this.requiredType.isInstance(result)) {
            
            try {
                return convertValueToRequiredType(result, this.requiredType);
            }
            catch (IllegalArgumentException ex) {
                throw new SQLException(
                        "Type mismatch affecting row number " + rowNum + " and column type '" +
                                rsmd.getColumnTypeName(1) + "': " + ex.getMessage());
            }
        }
        return result;
    }
@ Override public Object mapRow ( ResultSet rs , int rowNum ) throws SQLException { // Validate column count. ResultSetMetaData rsmd = rs . getMetaData ( ) ; int nrOfColumns = rsmd . getColumnCount ( ) ; if ( nrOfColumns == 0 ) { throw new SQLException ( "Returned no columns!" ) ; } else if ( nrOfColumns != 1 ) { throw new SQLException ( "Returned too many columns: " + nrOfColumns ) ; } // Extract column value from JDBC ResultSet Object result = getColumnValue ( rs , 1 , this . requiredType ) ; if ( ( result != null ) && ( this . requiredType != null ) && ! this . requiredType . isInstance ( result ) ) { // Extracted value does not match already: try to convert it. try { return convertValueToRequiredType ( result , this . requiredType ) ; } catch ( IllegalArgumentException ex ) { throw new SQLException ( "Type mismatch affecting row number " + rowNum + " and column type '" + rsmd . getColumnTypeName ( 1 ) + "': " + ex . getMessage ( ) ) ; } } return result ; }
Extract a value for the single column in the current row.
<p>Validates that there is only one column selected,
then delegates to <code>getColumnValue()</code> and also
<code>convertValueToRequiredType</code>, if necessary.

@see java.sql.ResultSetMetaData#getColumnCount()
@see #getColumnValue(java.sql.ResultSet,int,Class)
@see #convertValueToRequiredType(Object,Class)
Extract a value for the single column in the current row . <p > Validates that there is only one column selected then delegates to <code > getColumnValue () < / code > and also <code > convertValueToRequiredType< / code > if necessary .