Problem with SQLJ

Question

I am using SQLJ but cant seem to get the Named Iterators to work.
// None None
package db_interface;
import oracle.jdbc.OracleDriver;
import oracle.jdbc.*;
import entity.*;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.*;
import sqlj.runtime.*;
import oracle.sqlj.runtime.*;
import sqlj.runtime.ref.DefaultContext;
#sql public static iterator Employee_Iter
(int employee_id, String employee_dept, String first_name, String family_name, String login_name, String employee_email);
public void retrieveEmployee(String username) throws SQLException
System.out.println("Preparing to insert username: " + username);
Employee_Iter iter = null;
#sql [context] iter = { VALUES(comp326_2.retrieveEmployee(:in username)) };
while (iter.next())
System.out.println("Employee ID: " + iter.employee_id());
System.out.println("Employee_Name: " + iter.first_name()
+ " " + iter.family_name());
iter.close();
And the program here is fine, and it compiles and run, but i get the error in the program invalid column name, and I am not sure why...
My schema is this:
/*==============================================================*/
/* Table: Employee */
/*==============================================================*/
create table Employee
     employee_id INTEGER NOT NULL,
     employee_dept VARCHAR(20) NOT NULL,
     first_name VARCHAR(20),
     family_name VARCHAR(40) NOT NULL,
     login_name VARCHAR(40) NOT NULL,
     employee_email VARCHAR(60) NOT NULL,
     CONSTRAINT PK_Employee PRIMARY KEY (employee_id)
Now I have tried once and again to get it working...
But running out of ideas help =)

Answer 1

Oopsie forgot this:
create or replace package comp326_2 as
     type ref_cursor is REF CURSOR;
     function retrieveEmployee(username IN varchar) return ref_cursor;
create or replace package body comp326_2 is
     function retrieveEmployee(username IN VARCHAR) return ref_cursor is
          employee_details ref_cursor;
          user_not_found exception;
     begin
          open employee_details for          
          select * from Employee where login_name = username;
          if employee_details%NOTFOUND then
               raise user_not_found;
          end if;
          return employee_details;
     exception
          when user_not_found then
               raise_application_error(-20010, 'User not found!');
     end retrieveEmployee;