NullPointerException occurs when calling procedures

Question

Hi, this is the procedure that i have typed...
create or replace procedure insert_file (
p_file_type varchar2,
p_file_name varchar2,
p_id out number
)as
geor MDSYS.SDO_GEORASTER;
begin
insert into nyp_images values( assignByID.nextval, p_file_type, sdo_geor.init('NYP_IMAGES_RDT') )
returning image_id into p_id;
select image into geor from nyp_images where image_id = p_id for update;
sdo_geor.importFrom(geor, NULL, p_file_type, 'file', p_file_name);
update nyp_images set image = geor Where image_id = p_id;
end insert_file;
When i tried to call the procedure using the codes below...
public void insertFile()
int ret_code;
Connection conn=null;
try {
//Load and register Oracle driver
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
//Establish a connection
StrutsUploadForm form= new StrutsUploadForm();
String filename=form.getTheFile().toString();
//int p_id=0;
conn = DriverManager.getConnection("jdbc:oracle:thin:@dbdev.nyp.edu.sg:1521:orcl", "ias_spatial", "ias_spatial");
CallableStatement pstmt =
conn.prepareCall("{call insert_file(?,?,?)}");
//pstmt.setInt(1, p_id);
pstmt.registerOutParameter(2,Types.VARCHAR);
pstmt.setString(3, filename);
pstmt.executeUpdate();
pstmt.close();
conn.close();
} catch (SQLException e) {System.out.println("Error" + e);}
I have encountered NullPointerException Error...
Can anyone please advise me on that?
Thanks and regards,
Esther

Answer 1

I have no clue about java but as we have changed the order of the parameters in the PL/SQL procedure, I guess you have to change them also in the java code i.e. your
//pstmt.setInt(1, p_id);
pstmt.registerOutParameter(2,Types.VARCHAR);
pstmt.setString(3, filename);should probably be more like
pstmt.setString(1,filetype);
pstmt.setString(2, filename);
pstmt.registerOutParameter(3, Types.NUMBER);