UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

我想刷新一个使用java代码的jsf组件。首先，我尝试使用：UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

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

但它产生一个“UnsupportedOperationException”。然后，我尝试安装omnifaces并使用Ajax.update（“MyComp”）。其结果是一样的：

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)

我尝试重现这里找到同样的例子：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和实现（2.1.11版本），特立尼达2.1.0，tomahawk2 1.1.14， primefaces 3.5

任何想法？

感谢

来源

2013-05-16 Clément

MyFaces的不能是原因，它一直在MyFaces的为我们和其他人的工作。然而，我们从来没有真正使用过特立尼达，所以我看了一下特立尼达的源代码。它appears它返回Collections#emptySet()时没有渲染ID。这是immutable！这完全解释了你面临的例外。

这是特立尼达的一个相当惊人的错误。 javadoc清楚地表明返回的集合必须是可变的。

从请求参数名称PARTIAL_RENDER_PARAM_NAME返回当前请求中的客户端标识符的Collection。如果没有这样的请求参数，则返回一个空的Collection。这些客户端标识符用于标识将在请求处理生命周期的呈现阶段处理的组件。 返回的Collection是可变的。

如果你喜欢特立尼达，请把它作为一个bug报告给特立尼达家伙。否则就是摆脱它。如果您已经使用PrimeFaces（和Tomahawk），我没有看到有任何理由使用它。

来源

2013-05-17 02:11:22 BalusC

感谢您的回答，我会向特立尼达报告一个错误。我们从开始使用Trinidad并使用它们的很多组件，因此很难停止使用它！ –

UnsupportedOperationException使用Ajax.update或getRenderIds（）。add

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