@Override
    protected void execRowAction(ITableRow row) throws ProcessingException {
        // here you can call i thin the menu option to open the form 
        // or just create the form here
    }

  @Override
  public byte[] loadFile(String id) throws ProcessingException {
    ByteArrayHolder contentHolder = new ByteArrayHolder();
    SQL.selectInto("SELECT CONTENT INTO :content FROM IMAGE WHERE ID=:id", new NVPair("content", contentHolder), new NVPair("id", id));
    return contentHolder.getValue();
  }

@Override
protected void execInitField() throws ProcessingException {
  String id = <<here goes your file id>>;
  byte[] content = SERVICES.getService(IFileTransferProcessService.class).loadFile(id);
  setImage(content);
}