如何正確使用<h：selectManyCheckbox>和<f：selectItems>與條件

Question

我正在學習Seam幾天以來，我想創建簡單的過濾器使用 <h:selectManyCheckbox>和<f:selectItems>標籤。 這裏是標籤斷枝XHTML文件：

<h:selectManyCheckbox value="#{userSessionsSession.selected}"> 
    <f:selectItems value="#{usersSessionsPage.logLevelList}" /> 
</h:selectManyCheckbox> 

中UserSessionSession我：

private List<String> selected; 

    public List<String> getSelected() { 
     return selected; 
    } 

    public void setSelected(List<String> selected) { 
     this.selected = selected; 
    } 

UserSessionPage：

private List<SelectItem> logLevelList; 

public List<SelectItem> getLogLevelList(){ 
     if(logLevelList == null){ 
      logLevelList = new ArrayList<SelectItem>(); 
      Collection<MdoUserSessionDetStatus> tmpList = sessionAuditUtils.getDetailsStatusEntities(); 
      for(MdoUserSessionDetStatus mdo: tmpList){ 
       logLevelList.add(new SelectItem(mdo.getCode(), mdo.getName())); 
      } 
     } 
     return logLevelList; 
    } 

，並在功能上與標準restictions：

if (selected != null && !ANY_STATUS.equals(selected)) { 
      criteria.add(Restrictions.eq("mdoUserSessionDetStatus.code", selected)); 
     } 

當我檢查和提交選項沒有任何反應和控制檯dispalys警告：

WARNING: FacesMessage(s) have been enqueued, but may not have been displayed. 
sourceId=filterPanelForm:j_id163[severity=(ERROR 2), summary=(Conversion Error setting value 'DEBUG' for '#{userSessionsSession.selected}'.), detail=(Conversion Error setting value 'DEBUG' for '#{userSessionsSession.selected}'.)] 

我不知道如何正確處理這個事件，任何一個能幫助我嗎？ 我將不勝感激。

Answer 1

你將不得不改變它

private SelectItem[] logLevelList; 

public SelectItem[] getLogLevelList(){ 

if(logLevelList == null){ 

Collection<MdoUserSessionDetStatus> tmpList = sessionAuditUtils. 
                getDetailsStatusEntities(); 

logLevelList = new SelectItem[tmpList .size() + 1]; 

for(MdoUserSessionDetStatus mdo: tmpList){ 
      logLevelList.add(new SelectItem(mdo.getCode(), mdo.getName())); 
     } 
    } 
    return logLevelList; 
}