View image based on the query

Question

view image based on the query
hi i what to download my image based on the following query,am in jdeveloper 11g am using this method for download,i show the whole link of procedure where the query is located and how was it used in forms,but nw i what to take the query and put it in my java code not the webutil just the query,i put the whole forms package so you can undestand the logic of the query how was it used
    public void ViewImage(FacesContext facesContext, OutputStream outputStream)
        BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
        // get an ADF attributevalue from the ADF page definitions
        AttributeBinding attr = (AttributeBinding) bindings.getControlBinding("DocumentImage");
        if (attr == null)
            return;
        // the value is a BlobDomain data type
        BlobDomain blob = (BlobDomain) attr.getInputValue();
        try
        {   // copy the data from the BlobDomain to the output stream
            IOUtils.copy(blob.getInputStream(), outputStream);
            // cloase the blob to release the recources
            blob.closeInputStream();
            // flush the output stream
            outputStream.flush();
        catch (IOException e)
            // handle errors
            e.printStackTrace();
            FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR, e.getMessage(), "");
            FacesContext.getCurrentInstance().addMessage(null, msg);
    }when i use the above method in diffient screen without the upload i get this error
Target Unreachable, identifier 'viewImage' resolved to null
Error     
The file was not downloaded or was not downloaded correctly.
the below procedure is how i what to download the image but in java,but usin query in below procedure
function right_file (idref integer, i_file varchar2) return boolean is
begin
     -- check directory
     -- file size
       if webutil_file.file_exists(dir ||'\' ||i_file) then
       return true;
       end if;
return false;
end;
procedure download(i_dref integer, i_file varchar2) is
file varchar2(50);
dlin_id integer;
l_success boolean;
begin
     if not right_file (i_dref ,i_file ) then
            select file_name,dlin.id
            into file, dlin_id
            from sms_document_links dlin
                ,sms_document_references dref
            where dref.id = i_dref
            and dref.dlin_id = dlin.id
   l_success :=  webutil_file_transfer.DB_To_Client
                     ( dir ||'\'|| file,
                       'SMS_DOCUMENT_LINKS',
                       'DOCUMENT_IMAGE',
                       'id = '||dlin_id);
  end if;          
end download;
procedure open_image (i_dref integer,i_file varchar2) is
begin          
     local_path;
  local_viewer;       
     if I_file is not null then
          file := i_file;
     else
          select file_name into file
          from sms_document_references
          where id = i_dref
     end if;
     download(i_dref, file);
     if not webutil_host.ID_NULL(active_process) then
    close_previous_image_process;
     end if;
     image_dir_file := dir ||'\'|| file;
     process :=  webutil_host.nonblocking (image_viewer || image_dir_file);
     if webutil_host.ID_NULL(active_process) then
          active_process := process;
     end if;
     if webutil_host.equals(process,active_process) then
          null;
     else     
    close_previous_image_process;
    active_process := process;
     end if; 
     viewer_active := true;
end;--

Answer 1

oh ho.
Dear user,
this is not code factory/design factory/bla bla bla.
this area for guide peoples where you are? what is way right to reach your target/goal. whatever in you words...
from your post and also procedures, you are from forms background. am also came from ORacle froms 10g background try to understand. and implement it adf.
back to topic:
Target Unreachable, identifier 'viewImage' resolved to null Error .i just am giving the steps to igonre your error
simple go to your taskflow - go to overview section - go to managed beans. configured you which you created bean say as x.java
if you create following code can be seen in source
<?xml version="1.0" encoding="windows-1252" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
  <task-flow-definition id="xx-V-TF">
    <default-activity id="__1">xxV</default-activity>
    <managed-bean id="__2">
      <managed-bean-name id="__4">SUP1040V</managed-bean-name>
      <managed-bean-class id="__5">com.x.x.view.xBeans.xxV</managed-bean-class>
      <managed-bean-scope id="__3">backingBean</managed-bean-scope>
    </managed-bean>
    <view id="xV">
      <page>/ReportsPageFragments/xxV.jsff</page>
    </view>
    <use-page-fragments/>
  </task-flow-definition>
</adfc-config>