How to convert BlobDomain to Blob ?

Question

Hi all!
I have created row in VO with field of BlobDomain type according to "File Upload and Download" in Developer guide. I want to save this row in database now.
I created CallableStatement and tried to set values in the insert query.
This code works:
callableStatement.setBlob(2,BLOB.empty_lob);
But I need to convert BlobDomain to Blob:
Blob = myBlob ----?????------- (BlobDomain)row.getAttribute("FileData")
callableStatement.setBlob(2, myBlob );
Could you help me?
Thanks in advance.
Edited by: Bunigin on 03.06.2009 7:43

Answer 1

#edit: found a workaround/solution. #
statement.setBlob has an override method that accepts an InputStream.
So get rid of the BlobDomain alltogether and pass the UploadedFile's InputStream directly into your CallableStatement as outlined below.
This works in my application.
Inside your backing bean in the valueChangeListener for the InputFile component on the page...
UploadedFile file = (UploadedFile)valueChangeEvent.getNewValue();
InputStream fileData = getInputStream(file);
ApplicationModule am = BindingContext.getCurrent().getDefaultDataControl().getApplicationModule();
MyAppModuleImpl myAppModuleImpl = (MyAppModuleImpl)am;
myAppModuleImpl.myFunction(fileData);Inside the bean (used above).
private InputStream getInputStream(UploadedFile file) {
  InputStream in = null;
  try {
    in = file.getInputStream();
  } catch (IOException e) {
    e.printStackTrace();
  return in;
}Inside your Application Module's Impl class (MyAppModuleImpl above).
public void myFunction(InputStream pFileData) {
    String insertDML = "{call my_pkg.my_pkg_function(?)}";
    CallableStatement statement = getDBTransaction().createCallableStatement(insertDML, 1);
    try {
      statement.setBlob(1, pFileData);
      statement.execute();
      statement.close();
    } catch (Exception ex) {
      throw new JboException(ex);
  }Regards,
Matthew.