Problems for retrieving image attributes

Question

Hi,
I am a new user for Oracle interMedia and i have following problem.
I have wroten ein java programm to retrieve the image properties. At First, the images (jpg, tif) are stored as BLOB in the table, then i use the function setProperties() to set the image attributes.
PreparedStatement pstmt = con.prepareStatement("INSERT INTO btable VALUES(?, ORDSYS.ORDImage.init())");
for (int ef=1; ef<=anzahl_summe; ef++){
pstmt.setInt(1, ef);
pstmt.execute();
OracleResultSet rs = (OracleResultSet)stmt.executeQuery("SELECT * FROM btable WHERE bid = " + ef + " FOR UPDATE");
while(rs.next()) {
OrdImage imgObj = (OrdImage)rs.getCustomDatum(2, OrdImage.getFactory());
imgObj.loadDataFromFile(f_location[ef]);
imgObj.setProperties();
OraclePreparedStatement orpstmt = (OraclePreparedStatement)con.prepareStatement("UPDATE btable SET bild = ? WHERE bid =" + ef);
orpstmt.setCustomDatum(1,imgObj);
orpstmt.execute();
orpstmt.close();
Now if i use the functions getHeight(), getFormat(), ... for querying the properties, i will get just only the values for the image height, width and size. The other attribute values i get either null or ???. I don't understand why. The Bildforamte(jpg, tif)are supported by Oracle.
Can you tell me what shall i do?
thank you very much and greeting from germany
rabbit

Answer 1

Hi larry,
thank you for your help. I have set autocommit off and commit in the end of the programm. I think, that is not a problem.
I use the following table:
CREATE TABLE bildtable_intern(bild_id int PRIMARY KEY not null, bild ORDSYS.ORDImage)
My java programm:
public class OracleBild_intern {
public Connection connect() throws Exception{
//thin driver is used
conn.setAutoCommit(false);
public void bildmessung(Connection con) throws Exception{
PreparedStatement pstmt = con.prepareStatement("INSERT INTO bildtable_intern VALUES(?, ORDSYS.ORDImage.init())");
for (int ef=1; ef<=10; ef++){
pstmt.setInt(1, ef);
pstmt.execute();
OracleResultSet rs = (OracleResultSet)stmt.executeQuery("SELECT * FROM bildtable_intern WHERE bild_id = " + ef + " FOR UPDATE");
while(rs.next()) {
OrdImage imgObj = (OrdImage)rs.getCustomDatum(2, OrdImage.getFactory());
//I have also tried to use loadDataFromInputStream() and loadDataFromByteArray()
imgObj.loadDataFromFile(f_location[ef]);
imgObj.setProperties();
OraclePreparedStatement orpstmt = (OraclePreparedStatement)con.prepareStatement("UPDATE bildtable_intern SET bild = ? WHERE bild_id =" + ef);
orpstmt.setCustomDatum(1,imgObj);
orpstmt.execute();
orpstmt.close();
pstmt.close();
retrieveattr(con);
public long retrieveattr(Connection con) throws Exception{
OracleResultSet rs = (OracleResultSet)stmt.executeQuery("SELECT * FROM bildtable_intern");
while (rs.next()){
OrdImage imgObj = (OrdImage)rs.getCustomDatum(2, OrdImage.getFactory());
System.out.println("bild_id = " + rs.getInt(1));     
System.out.println("bild_height = " + imgObj.getHeight());
System.out.println("bild_width = " + imgObj.getWidth());
System.out.println("bild_size = " + imgObj.getContentLength());
System.out.println("bild_format = " + imgObj.getFormat());
System.out.println("contentformat = " + imgObj.getContentFormat());
System.out.println("compressionformat = " + imgObj.getCompressionFormat());
System.out.println("mimetyp = " + imgObj.getMimeType());
public static void main(String[] args) throws Exception{
//call the methode connect()
con.commit();
con.close();
I try again, but i get always only the values for image height, width and contentlength. Can you tell me, what ist wrong with this programm?
Thank you very much and greeting aus germany!
rabbit