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List:       myfaces-dev
Subject:    [jira] [Resolved] (MYFACES-4421) NullPointerException in TagAttributeImpl
From:       "Thomas Andraschko (Jira)" <dev () myfaces ! apache ! org>
Date:       2021-11-19 11:40:00
Message-ID: JIRA.13412749.1637317065000.39929.1637322000011 () Atlassian ! JIRA
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     [ https://issues.apache.org/jira/browse/MYFACES-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Thomas Andraschko resolved MYFACES-4421.
----------------------------------------
    Fix Version/s: 2.2.15
       Resolution: Duplicate

> NullPointerException in TagAttributeImpl
> ----------------------------------------
> 
> Key: MYFACES-4421
> URL: https://issues.apache.org/jira/browse/MYFACES-4421
> Project: MyFaces Core
> Issue Type: Bug
> Components: General
> Affects Versions: 2.2.13
> Environment: Environment ist not of interest for this issue
> Reporter: Ulrich Lohrmann
> Priority: Major
> Fix For: 2.2.15
> 
> 
> Beginning with MyFaces version 2.2.13 I get a NullPointerException in the \
> TagAttributeImpl class upon rendering a JSF page. This error did not occur before \
> 2.2.13. {code:java}
> java.lang.NullPointerException
> org.apache.myfaces.view.facelets.tag.TagAttributeImpl.getValueExpression(TagAttributeImpl.java:569)
>  org.apache.myfaces.view.facelets.tag.jsf.ComponentRule$ValueExpressionMetadata.applyMetadata(ComponentRule.java:73)
>  org.apache.myfaces.view.facelets.tag.MetadataImpl.applyMetadata(MetadataImpl.java:45)
>  javax.faces.view.facelets.MetaTagHandler.setAttributes(MetaTagHandler.java:63)
> javax.faces.view.facelets.DelegatingMetaTagHandler.setAttributes(DelegatingMetaTagHandler.java:90)
>  org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.apply(ComponentTagHandlerDelegate.java:291)
>  javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:50)
>  org.apache.myfaces.view.facelets.tag.jsf.core.FacetHandler.apply(FacetHandler.java:75)
>  org.apache.myfaces.view.facelets.tag.composite.CompositeComponentResourceTagHandler.applyNextHandlerIfNotApplied(CompositeComponentResourceTagHandler.java:299)
>  org.apache.myfaces.view.facelets.tag.composite.CompositeComponentResourceTagHandler.applyNextHandler(CompositeComponentResourceTagHandler.java:235)
>  org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.apply(ComponentTagHandlerDelegate.java:374)
>  javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:50)
>  javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:46)
>  javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(DelegatingMetaTagHandler.java:55)
>  org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.apply(ComponentTagHandlerDelegate.java:374)
>  javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:50)
>  javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:46)
>  org.apache.myfaces.view.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:66)
>  javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:46)
>  javax.faces.view.facelets.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:46)
>  org.apache.myfaces.view.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:48)
>  org.apache.myfaces.view.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:189)
>  org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.buildView(FaceletViewDeclarationLanguage.java:477)
>  org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:83)
>  org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:267)
> javax.faces.webapp.FacesServlet.service(FacesServlet.java:200)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) {code}
> I have created a show case on Github: \
> [https://github.com/UlrichLohrmann/MyFacesError.git] that can be used to reproduce \
> the error. I have a composite component ConfirmDialog.xhtml that hides details of a \
> Primefaces dialog. In addition that composite component defines two facets \
> "buttonOne" and "buttonTwo". I now use this composite component in the JSF page \
> index.html. Here I provide content for the two facets.
> {code:java}
> <m:ConfirmDialog id="confirmDialog_Empfangsberechtigter_Loeschen" \
> widgetVar="confirmDialog_Empfangsberechtigter_Loeschen_widget"> <f:facet \
> name="buttonOne"> <p:commandButton value="Yes" \
> oncomplete="PF('#{cc.attrs.widgetVar}').hide();" />  </f:facet>
> .
> <f:facet name="buttonTwo">
> <p:commandButton value="No"
> styleClass="ui-button-ghost"
> onclick="PF('#{cc.attrs.widgetVar}').hide();" ajax="true" />
> </f:facet>{code}
> As I don't want to use the widget var of the composite component in the f:facet, I \
> use "#\{cc.attrs.widgetVar}" in the facet to address the name of the widget var \
> INSIDE the composite component. That works with MyFaces 2.2.12 but not more with \
> 2.2.13 and higher. If I replace the "cc.attrs.widgetVar" with the name of the \
> widgetVar (confirmDialog_Empfangsberechtigter_Loeschen_widget) everything works \
> fine. So it looks to me that Myfaces 2.2.12 and earlier evaluates the \
> "cc.attrs.widgetVar" expression AFTER the facet was rendered in the composite \
> component (so from the inside view of the composite component) whereas from 2.2.13 \
> on it seems that the expression is renderes BEFORE the facet is rendered inside the \
> composite component. The sample from github can be executed in a tomcat and the \
> error occurs when accessing index.xhtml



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