JSF 2 / Richfaces 4：复合组件内部的Ajax

Question

我有一个基于extendedDataTable的复合组件。我使用以下标签：

<composite:insertChildren />

在我的复合组件中

允许用户插入extendedDataTable的列。这是我的组成部分：

<composite:interface>
<composite:attribute name="id" />
<composite:attribute name="value" />
<composite:attribute name="selection" />
<composite:attribute name="selectionMode" />
<composite:attribute name="targetIds" />
<composite:attribute name="readonly" />
<composite:attribute name="showViewButton" default="true"/>
<composite:attribute name="showEditButton" default="true"/>
<composite:attribute name="showDeleteButton" default="true"/>
<composite:attribute name="showSaveButton" default="true"/>
<composite:clientBehavior name="blur" event="blur" targets="#{cc.attrs.renderIds}" default="true"/>  
<composite:attribute name="renderIds" />
<composite:attribute name="saveRenderIds" />        
<composite:attribute name="deleteRenderIds" />
<composite:attribute name="viewRenderIds" />
<composite:attribute name="editRenderIds" />            
<composite:attribute name="controller" />
<composite:attribute name="headerStr" />
<composite:attribute name="messagesGridId" required="true"/>
<composite:attribute name="viewButtonClick" />
 </composite:interface>
 <composite:implementation>
<h:outputStylesheet library="css" name="inlineEditGrid.css" />
<h:outputScript library="js" name="inlineEditGrid.js" target="head" />
<h:form id="inlineGridForm" >   
    <rich:extendedDataTable id="inlineEditGrid" 
        styleClass="inlineEditGrid" value="#{cc.attrs.value}"
        var="currentRow" selection="#{cc.attrs.selection}"
        selectionMode="#{cc.attrs.selectionMode}"
        onready="prepareInlineGrid(this);" 
        rowKeyVar="rowKeyVar" rows="#{cc.attrs.controller.pageSize}">
        <c:if test="#{!empty cc.getValueExpression('headerStr')}">
            <f:facet name="header">
                <h:outputText value="#{cc.attrs.headerStr}" />
            </f:facet>
        </c:if>
        <a4j:ajax  event="selectionchange" immediate="true"
            listener="#{cc.attrs.controller.selectionListener}" render="#{cc.attrs.renderIds}"/>
        <!-- Inserting columns provided by page author -->
        <composite:insertChildren />
    </rich:extendedDataTable></h:form>

以下是此组件的用法：

<ejadacomponents:inlineEditGrid id="masterGrid" 
    value="#{masterDetailController.dataModel}"  
    selection="#{masterDetailController.selection}" messagesGridId="messagesGrid"
    selectionMode="#{masterDetailController.selectionMode}"
            controller="#{masterDetailController}"  viewButtonClick="#{rich:component('modalPanel')}.show();"
            renderIds="detailGrid:inlineGridForm:inlineEditGrid ">


        <rich:column width="200px">
            <f:facet name="header">
                <h:outputText value="#{msgs['masterLayoutPoc.deptNo']}" />
            </f:facet>

            <h:inputText value="#{currentRow.deptNo}"  styleClass="disabledField creationOnly"/>
        </rich:column>

        <rich:column>
            <f:facet name="header">
                <h:outputText value="#{msgs['masterLayoutPoc.deptName']}" />
            </f:facet>

            <h:inputText  value="#{currentRow.dName}" id="dName" required="true" requiredMessage="this field is required ya ma3alem" render="messageField">

                <f:ajax event="blur" execute="@this"  />

            </h:inputText>
            <br/>
            <h:message id="messageField" for="dName" title="this field is required ya ma3alem"  />
        </rich:column>

        <rich:column>
            <f:facet name="header">
                <h:outputText value="#{msgs['masterLayoutPoc.deptLoc']}" />
            </f:facet>

            <h:inputText value="#{currentRow.loc}" />

        </rich:column>
    </ejadacomponents:inlineEditGrid>

但是在运行后我得到了这个例外：

javax.faces.FacesException: Unexpected error restoring state for component with id myForm:masterGrid:inlineGridForm:inlineEditGrid:dName.  Cause: java.lang.ClassCastException: javax.faces.component.StateHolderSaver cannot be cast to [Ljava.lang.Object;.
at com.sun.faces.application.view.StateManagementStrategyImpl$1.visit(StateManagementStrategyImpl.java:250)
at com.sun.faces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:147)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1481)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at org.richfaces.component.UIDataAdaptor.visitComponents(UIDataAdaptor.java:1246)
at org.richfaces.component.UIDataAdaptor.visitDataChildren(UIDataAdaptor.java:1273)
at org.richfaces.component.UIDataTableBase.visitDataChildren(UIDataTableBase.java:395)
at org.richfaces.component.AbstractExtendedDataTable.visitDataChildren(AbstractExtendedDataTable.java:156)
at org.richfaces.component.UIDataAdaptor.visitTree(UIDataAdaptor.java:1347)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UIForm.visitTree(UIForm.java:331)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UINamingContainer.visitTree(UINamingContainer.java:159)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UIForm.visitTree(UIForm.java:331)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1492)
at com.sun.faces.application.view.StateManagementStrategyImpl.restoreView(StateManagementStrategyImpl.java:234)
at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:177)
at com.sun.faces.application.view.ViewHandlingStrategy.restoreView(ViewHandlingStrategy.java:119)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.restoreView(FaceletViewHandlingStrategy.java:438)
at com.sun.faces.application.view.MultiViewHandler.restoreView(MultiViewHandler.java:144)
at javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:284)
at javax.faces.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:284)
at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:183)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97)
at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:107)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114)

如果我删除这个ajax标签，一切都很好：

<f:ajax event="blur" execute="@this"  />

我的代码有问题吗？

谢谢和最诚挚的问候，

巴萨姆