Bauke Scholtz created MYFACES-3942:
--------------------------------------
Summary: <f:viewParam binding> causes NPE because UIViewRoot is
null
Key: MYFACES-3942
URL: https://issues.apache.org/jira/browse/MYFACES-3942
Project: MyFaces Core
Issue Type: Bug
Affects Versions: 2.2.6
Environment: Tomcat 8.0.14 and TomEE 2.0.0 snapshot.
Reporter: Bauke Scholtz
Using {{binding}} attribute on {{<f:viewParam>}} as follows:
{code}
<f:viewParam name="foo" binding="#{foo}" />
{code}
causes regardless of the binding location (Facelet itself as demonstrated
above, request scoped bean, session scoped bean, etc) the following exception:
{code}
java.lang.NullPointerException
at
org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.createComponent(ComponentTagHandlerDelegate.java:534)
at
org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.apply(ComponentTagHandlerDelegate.java:284)
at
javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMetaTagHandler.java:50)
at
org.apache.myfaces.view.facelets.tag.jsf.core.ViewMetadataHandler.apply(ViewMetadataHandler.java:85)
at
org.apache.myfaces.view.facelets.tag.jsf.core.ViewHandler.apply(ViewHandler.java:195)
at
org.apache.myfaces.view.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:59)
at
org.apache.myfaces.view.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:48)
at
org.apache.myfaces.view.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:188)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage$FaceletViewMetadata.createMetadataView(FaceletViewDeclarationLanguage.java:2752)
at
org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:255)
at
org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:196)
at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:143)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
...
{code}
Turns out that {{UIViewRoot}} is {{null}} while the code didn't expect that.
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