java.lang.NullPointerException: at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.getAttributeValue

StackOverflow https://stackoverflow.com/questions/22879413

Question

I'm trying to use the new passthrough attribute feature in my web application, however i'm having problems with nullable attributes. This is the code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 

"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:p="http://primefaces.org/ui" 
      xmlns:util="http://xmlns.jcp.org/jsf/composite/util"
      xmlns:pt="http://xmlns.jcp.org/jsf/passthrough"
      xmlns:c="http://xmlns.jcp.org/jsp/jstl/core">
...
<p:outputPanel  pt:example="#{mybean.nullableAttribute}"  >
...
</p:outputPanel>

I'm getting the exception:

ERROR  javax.enterprise.resource.webcontainer.jsf.application 12:01:09.205 [http-listener-1(3)]  - Error Rendering View[/index.xhtml]
java.lang.NullPointerException: null
    at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.getAttributeValue(HtmlResponseWriter.java:1215) ~[javax.faces-2.2.6.jar:2.2.6]
    at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.flushAttributes(HtmlResponseWriter.java:1175) ~[javax.faces-2.2.6.jar:2.2.6]
    at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.closeStartIfNecessary(HtmlResponseWriter.java:1117) ~[javax.faces-2.2.6.jar:2.2.6]
    at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.startElement(HtmlResponseWriter.java:646) ~[javax.faces-2.2.6.jar:2.2.6]
    at org.primefaces.component.growl.GrowlRenderer.encodeEnd(GrowlRenderer.java:38) ~[primefaces-4.0.jar:4.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) ~[javax.faces-2.2.6.jar:2.2.6]
    at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:74) ~[primefaces-4.0.jar:4.0]
    at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:57) ~[primefaces-4.0.jar:4.0]
    at org.primefaces.component.outputpanel.OutputPanelRenderer.encodeMarkup(OutputPanelRenderer.java:64) ~[primefaces-4.0.jar:4.0]
    at org.primefaces.component.outputpanel.OutputPanelRenderer.encodeEnd(OutputPanelRenderer.java:40) ~[primefaces-4.0.jar:4.0]
    at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1864) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.render.Renderer.encodeChildren(Renderer.java:176) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:889) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1857) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) ~[javax.faces-2.2.6.jar:2.2.6]
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1860) ~[javax.faces-2.2.6.jar:2.2.6]

When the attribute is null. It does work when it's not null. I have tried with mojarra 2.2.0 and 2.2.6 (I'm on glassfish 4.0)

Any ideas?

Thanks!

Was it helpful?

Solution

This bug was reported as issue 3208 is fixed in Mojarra 2.2.7.

So, upgrading to at least that version should do. Currently, it's already at 2.2.8.

OTHER TIPS

I finally used a custom EL function

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