How to keep Uploaded file's content between calls-content is lost in region

Question

hi,
UploadedFile content lost when saving to pageFlowScope.
the use case is to upload a binary file into db. jdev 11.1.2.3
i try to start from
http://tompeez.wordpress.com/tag/affiledownloadactionlistener/
and instead of making all the handling in inputFile's ValueChangeEventListener(),
i'd like to split functionality between inputfile and a run button.
user chooses a file using inputFile
then in backingbean of the request scope
UploadedFile file = (UploadedFile) valueChangeEvent.getNewValue();
Map<String,Object> pageFlowScope = adfFacesContext.getPageFlowScope();
pageFlowScope.put("uploadedfile",file);
in button's ActionEventListener i try to recall UploadedFile.
Map<String,Object> pageFlowScope = adfFacesContext.getPageFlowScope();
UploadedFile file;
file=(UploadedFile)pageFlowScope.get("uploadedfile");
what i found out is fileName=file.getFilename() still shows the original filename, but...
file.getLength() returns 0;
at the same time, when called from ValueChangeEventListener() file.getLength() gets the actual number of bytes
what might cause the content to disappear?
i tried to change backing bean's scope to pageFlowScope without any success
Edited by: grodno on Feb 28, 2013 4:26 AM
Edited by: grodno on Mar 1, 2013 12:49 AM

Answer 1

This will not work as the stream will not be available after the request.
You can set the value propety of the af:inputFile directly to the pageflowScopeBean like
<af:inputFile label="File"
                                value="#{pageFlowScope.fileData}" id="if1"/>
   private UploadedFile fileData;
    public void setFileData(UploadedFile afile)
        this.fileData = afile;
    public UploadedFile getFileData()
        return fileData;
public actionListener(ActionEvent av) {
        // and in the action listener
        // TODO aktuelles bild kann nicht über getBildNr() geladen werden
        if (getBildDatei() == null)
            return null;
        UploadedFile file = getBildDatei();
        //work as usual
}Be careful with putting the UploadFile in pageFlowScope as this scope is too broad. You should use ViewScope.
Timo