private void update()
     throws ControllerException, AuthorityException, ServiceException, Exception {
   this.checkFields();
   SysTwitterVO oldSysTwitter = new SysTwitterVO();
   oldSysTwitter.setOid(this.getFields().get("oid"));
   DefaultResult<SysTwitterVO> oldResult = this.sysTwitterService.findObjectByOid(oldSysTwitter);
   if (oldResult.getValue() == null) {
     throw new ServiceException(oldResult.getSystemMessage().getValue());
   }
   oldSysTwitter = oldResult.getValue();
   SysTwitterVO sysTwitter = new SysTwitterVO();
   sysTwitter.setOid(oldSysTwitter.getOid());
   sysTwitter.setSystem(oldSysTwitter.getSystem());
   sysTwitter.setTitle(this.getFields().get("title"));
   sysTwitter.setEnableFlag(
       ("true".equals(this.getFields().get("enableFlag")) ? YesNo.YES : YesNo.NO));
   sysTwitter.setContent(null); // 先清除之前的blob資料
   this.sysTwitterService.updateObject(sysTwitter); // 先清除之前的blob資料	
   String content = StringEscapeUtils.unescapeEcmaScript(this.getFields().get("content"));
   sysTwitter.setContent(content.getBytes());
   DefaultResult<SysTwitterVO> result = this.sysTwitterService.updateObject(sysTwitter);
   this.message = result.getSystemMessage().getValue();
   if (result.getValue() != null) {
     this.success = IS_YES;
   }
 }
 private void delete()
     throws ControllerException, AuthorityException, ServiceException, Exception {
   SysTwitterVO sysTwitter = new SysTwitterVO();
   sysTwitter.setOid(this.getFields().get("oid"));
   DefaultResult<Boolean> result = this.sysTwitterService.deleteObject(sysTwitter);
   this.message = result.getSystemMessage().getValue();
   if (result.getValue() && result.getValue()) {
     this.success = IS_YES;
   }
 }