UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

我想刷新一個使用java代碼的jsf組件。首先，我嘗試使用：UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

FacesContext.getCurrentInstance().getPartialViewContext().getRenderIds().add("MyCompId");

但它產生一個「UnsupportedOperationException」。然後，我嘗試安裝omnifaces並使用Ajax.update（「MyComp」）。其結果是一樣的：

org.apache.myfaces.view.facelets.el.ContextAwareELException: javax.el.ELException: java.lang.UnsupportedOperationException 
    at org.apache.myfaces.view.facelets.el.ContextAwareTagMethodExpression.invoke(ContextAwareTagMethodExpression.java:108) 
    at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:68) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:120) 
    at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:1041) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:289) 
    at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1415) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:765) 
    at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:38) 
    at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170) 
    at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:357) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:303) 
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:208) 
    at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:662) 
Caused by: javax.el.ELException: java.lang.UnsupportedOperationException 
    at org.apache.el.parser.AstValue.invoke(AstValue.java:291) 
    at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:274) 
    at org.apache.myfaces.view.facelets.el.ContextAwareTagMethodExpression.invoke(ContextAwareTagMethodExpression.java:96) 
    ... 34 more 
Caused by: java.lang.UnsupportedOperationException 
    at java.util.AbstractCollection.add(AbstractCollection.java:221) 
    at org.omnifaces.util.Ajax.update(Ajax.java:75)

我嘗試重現這裏找到同樣的例子：http://showcase.omnifaces.org/utils/Ajax。我的XHTML：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" 
    xmlns:f="http://java.sun.com/jsf/core" 
    xmlns:h="http://java.sun.com/jsf/html" 
    xmlns:ui="http://java.sun.com/jsf/facelets" 
    xmlns:c="http://java.sun.com/jsp/jstl/core"> 
<f:view contentType="text/html"> 
    <h:body id="body"> 
     <h:form id="form"> 
      <div id="contentStyle">  
       <h:panelGroup styleClass="blocLsMsgErr" id="messages"> 
        <h:panelGroup styleClass="lsMsgErr"> 
         <h:dataTable var="facesMessage" 
          value="#{messagesComponent.listeCustomFacesMessage1}"> 
          <h:column> 
           <h:graphicImage alt="icon" 
            value="/images/messages/#{facesMessage.severity}_icon.png" /> 
          </h:column> 
          <h:column> 
           <h:outputLink rendered="#{not empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            onclick="document.getElementById('#{facesMessage.id}').focus();return false;"> 
            <h:outputText value="#{facesMessage.summary} " /> 
           </h:outputLink> 
           <h:outputText rendered="#{empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            value="#{facesMessage.summary} " /> 
          </h:column> 
          <h:column> 
           <h:outputText styleClass="#{facesMessage.severity}" 
            value=" -1- " /> 
          </h:column> 
          <h:column> 
           <h:outputText styleClass="#{facesMessage.severity}" 
            value="#{facesMessage.detail}" /> 
          </h:column> 
         </h:dataTable> 

         <h:panelGrid columns="1"> 
          <ui:repeat value="#{messagesComponent.listeCustomFacesMessage2}" 
           var="facesMessage"> 
           <h:graphicImage alt="icon" 
            value="/images/messages/#{facesMessage.severity}_icon.png" /> 
           <h:outputLink rendered="#{not empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            onclick="document.getElementById('#{facesMessage.id}').focus();return false;"> 
            <h:outputText value="#{facesMessage.summary} " /> 
           </h:outputLink> 
           <h:outputText rendered="#{empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            value="#{facesMessage.summary} " /> 
           <h:outputText styleClass="#{facesMessage.severity}" 
            value=" -2- " /> 
           <h:outputText styleClass="#{facesMessage.severity}" 
            value="#{facesMessage.detail}" /> 
           <br /> 
          </ui:repeat> 
         </h:panelGrid> 

         <h:panelGrid columns="4"> 
          <c:forEach items="#{messagesComponent.listeCustomFacesMessage3}" 
           var="facesMessage"> 
           <h:graphicImage alt="icon" 
            value="/images/messages/#{facesMessage.severity}_icon.png" /> 
           <h:outputLink rendered="#{not empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            onclick="document.getElementById('#{facesMessage.id}').focus();return false;"> 
            <h:outputText value="#{facesMessage.summary} " /> 
           </h:outputLink> 
           <h:outputText rendered="#{empty facesMessage.id}" 
            styleClass="titre #{facesMessage.severity}" 
            value="#{facesMessage.summary} " /> 
           <h:outputText styleClass="#{facesMessage.severity}" 
            value=" -3- " /> 
           <h:panelGroup> 
            <h:outputText styleClass="#{facesMessage.severity}" 
             value="#{facesMessage.detail}" /> 
            <br /> 
           </h:panelGroup> 
          </c:forEach> 
         </h:panelGrid> 

        </h:panelGroup> 
       </h:panelGroup> 

       <ui:insert name="content" /> 

       <h:commandButton styleClass="button" 
        value="#{messages.boutonSuivant}" id="buttonNext" 
        action="#{testBean.nextPage}"> 
        <f:ajax /> 
       </h:commandButton> 
      </div> 
      <h:commandButton value="submit" action="#{testBean.update}"> 
       <f:ajax /> 
      </h:commandButton> 
     </h:form> 
    </h:body> 
</f:view> 
</html>

我的豆：

import javax.inject.Named; 

import org.omnifaces.util.Ajax; 
import org.springframework.context.annotation.Scope; 

@Named 
@Scope("session") 
public class TestBean { 

    /** 
    * 
    */ 
    private static final long serialVersionUID = 1L; 

    public void update() { 
     System.out.println("Ajax update"); 
     Ajax.update("messages"); 
     System.out.println("Ajax update OK"); 
    } 

    public String nextPage() { 

     if (!this.validationChampsPagePersonne()) { 
      return null; 

     } 

     return "next"; 
    } 

    private boolean validationChampsPagePersonne() { 
    //doing a FacesContext.getCurrentInstance().addMessage(null, facesMessage); 
    } 

}

其它信息：我使用的MyFaces API和實現（2.1.11版本），特立尼達2.1.0，tomahawk2 1.1.14， primefaces 3.5

任何想法？

感謝

來源

2013-05-16 Clément

MyFaces的不能是原因，它一直在MyFaces的爲我們和其他人的工作。然而，我們從來沒有真正使用過特立尼達，所以我看了一下特立尼達的源代碼。它appears它返回Collections#emptySet()時沒有渲染ID。這是immutable！這完全解釋了你面臨的例外。

這是特立尼達的一個相當驚人的錯誤。 javadoc清楚地表明返回的集合必須是可變的。

從請求參數名稱PARTIAL_RENDER_PARAM_NAME返回當前請求中的客戶端標識符的Collection。如果沒有這樣的請求參數，則返回一個空的Collection。這些客戶端標識符用於標識將在請求處理生命週期的呈現階段處理的組件。 返回的Collection是可變的。

如果你喜歡特立尼達，請把它作爲一個bug報告給特立尼達傢伙。否則就是擺脫它。如果您已經使用PrimeFaces（和Tomahawk），我沒有看到有任何理由使用它。

來源

2013-05-17 02:11:22 BalusC

感謝您的回答，我會向特立尼達報告一個錯誤。我們從開始使用Trinidad並使用它們的很多組件，因此很難停止使用它！ –

UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

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