How to upload/download file into/from blob column in ADF/JDev 11g.

Question

Hello to all.
I found demo from Kuba user on that page: http://kuba.zilp.pl/?id=1
But that demo is for release 10g and too complicated for me for this time (I'm fish in Jdeveloper).
I can create some simple table view (of form view) with oracle connection with table with blob data.
Blob column will content doc/xls/pdf ...etc.
Now I can add two buttons for download and upload.
What I have to do in next time?
Is it possible to use some component or something?
Thank you
Ben

Answer 1

I was able to accomplish downloading from a blob, but I'm trying to dynamically set the ContentType.
As the table may contain different types of files, I'm setting the ContentType to #{row.Fileext}, where Fileext is set in SQL select as follows:
pseudocode: get file extension, and set the content type based on file extension.
sql select :decode(substr(fdv.file_name,instr(fdv.file_name,'.',-1,1)+1),'log','text/plain; charset=utf-8','xml','text/xml','xls','application/vnd.ms-excel','tif','image/tiff','jpg','image/jpeg','unknown')
I rather use a fuction/method, and tried the following instead:
ContentType = #{backingBeanScope.backing_processReqs.FileAttachContType}
where FileAttachContType =
public class ProcessReqs {
public String FileAttachContType() {
// code to substring filename for extension and decode values
return strContType
But I get the following error:
Error 500--Internal Server Error
          javax.el.PropertyNotFoundException: The class 'sunrider.reqpoportal.view.backing.ProcessReqs' does not have the property 'FileAttachContType'.
               at javax.el.BeanELResolver.getBeanProperty(BeanELResolver.java:547)
               at javax.el.BeanELResolver.getValue(BeanELResolver.java:249)
               at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:143)
Ideas?
PS: Kuba, I've been trying to get to your blog all day, and it would just time out.
Thanks everyone in advance!
-R
Edited by: user6631964 on Jul 24, 2009 5:55 PM