f:ajax cannot retrieve clientId from component
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                 Key: MYFACES-2583
                 URL: https://issues.apache.org/jira/browse/MYFACES-2583
             Project: MyFaces Core
          Issue Type: Bug
          Components: JSR-314
    Affects Versions: 2.0.0-beta-2
         Environment: JSF
            Reporter: Ganesh Jung


This code:
                <h:form id="myForm">
                <h:inputText value="#{myBean.test}">
                                <f:ajax 
render="#{myBean.bindingMyTest.clientId}" event="keyup"/> 
                </h:inputText>
                <h:inputText id="myText" value="#{myBean.test}" 
binding="#{myBean.bindingMyTest}" />
                </h:form>

produces java.lang.ClassCastException: java.lang.String cannot be cast to 
java.util.Collection

while this works:
                <h:form id="myForm">
                <h:inputText value="#{myBean.test}">
                                <f:ajax render="myForm:myText" event="keyup"/> 
                </h:inputText>
                <h:inputText id="myText" value="#{myBean.test}"/>
                </h:form>

On Mojarra both work fine. My guess is here's some problem with the special 
lifecycle of bindings properties.

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