Question

在给定的情况下，我想使用具有不同ManagedBeans的facelet，因此关于action-bean是作为参数给出的：

<?xml version="1.0" encoding="UTF-8" ?>
<!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:ui="http://java.sun.com/jsf/facelets" 
    xmlns:h="http://java.sun.com/jsf/html" >
<h:body>
    <ui:include src="ratings.xhtml" >
      <ui:param name="createAction" value="#{myOneCreateAction}" />
      <ui:param name="ratings" value="#{context.ratings}" />
    </ui:include>
</h:body>
</html>

我将创建操作作为参数value="#{myOneCreateAction}"。

在facelet中，一个组件也在其他页面上多次使用 - 所以我尝试在复合组件中重构它。

<html xmlns="http://www.w3.org/1999/xhtml" 
  xmlns:ui="http://java.sun.com/jsf/facelets" 
  xmlns:h="http://java.sun.com/jsf/html" 
  xmlns:f="http://java.sun.com/jsf/core" 
  xmlns:io="http://java.sun.com/jsf/composite/inoutComponents">
<ui:composition>
    <rich:dataTable id="ratingTblId" 
    value="#{ratings}" 
    var="rating">
        <rich:column>
             <io:removeButton
                 id="removeButton"
                 actionMethod="#{createAction.removeRating}"
                 immediate="true"
                 render=":#{rich:clientId('ratingTblId')}" />

             <h:commandButton
                 id="removeButton2"
                 actionListener="#{createAction.removeRating}"
                 immediate="true" >                    
                    <f:ajax render="ratingTblId" />
              </h:commandButton>
        </rich:column>
</rich:dataTable>
</ui:composition>
</html>

请参阅该方法如何以actionMethod="#{createAction.removeRating}"的形式提供给组件。该组件本身如下所示：

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:cc="http://java.sun.com/jsf/composite">
    <!-- INTERFACE -->
    <cc:interface>
        <cc:attribute 
            name="actionMethod" 
            targets="remove" 
            method-signature="void f(javax.faces.event.ActionEvent)"/>
        <cc:attribute name="render" required="false" />
    </cc:interface>

    <!-- IMPLEMENTATION -->
    <cc:implementation> 
        <h:commandButton 
           id="remove"
           actionListener="#{cc.attrs.actionMethod}" 
           onclick="if (!confirm('Do you really?')) { return false; }">
           <f:ajax execute="@this" render="#{cc.attrs.render}" />
        </h:commandButton> 
    </cc:implementation>
</ui:composition>

最后但并非最不重要的是，托管bean

Name("myOneCreateAction")
@Scope(ScopeType.CONVERSATION)
public class MyOneCreateAction {
   ...
   public void removeRating(ActionEvent ev) {
        // do something
   }
   ...
}

令人惊讶的是，当removeButton2正确跳转到正确的函数时，复合组件版本返回

javax.faces.event.AbortProcessingException: Target Unreachable, 
      identifier 'createAction' resolved to null

代替。使用Mojarra JSF 2.1.26和Seam 2.3.1.CR1。没有嵌套的复合组件。将复合组件参数替换为#{myOneCreateAction.removeRating}时，它的工作方式与预期相同。

以前有人见过这个吗？我瞎了吗？任何已知的解决方法......？提前谢谢！

Answer 1

我遇到了同样的问题，发现它已在2.2.15版中修复： https://github.com/javaserverfaces/mojarra/issues/4271

Managed Bean as Facelet参数允许复合组件阻止解析

1 个答案: