[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-3836) NPE in parameter conversion after rule redirect: String to Long?

[Francisco Jose Peredo Noguez (JIRA)]

NPE in parameter conversion after rule redirect: String to Long?
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                 Key: JBSEAM-3836
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-3836
             Project: Seam
          Issue Type: Bug
    Affects Versions: 2.1.0.SP1
            Reporter: Francisco Jose Peredo Noguez


I am getting this WARNING in my logs: 

WARN  org.jboss.seam.navigation.Param - could not create converter for: categoriaBienCveCategoria

(The full stacktrace is available in the referenced  forum thread)

This happens when I hit a navigation rule like this:

<rule if-outcome="persisted" if="#{not empty categoriaBienCveCategoriaFor}">
        	<end-conversation/>
        	<redirect view-id="#{categoriaBienFrom}">
        		<param name="categoriaBienCveCategoria" value="#{categoriaBienCveCategoriaFor}"/>
        		<param name="categoriaBienFrom" value="/Crud/CategoriaBien/CategoriaBienList.xhtml"/>        		
        	</redirect>
		</rule>

As a side effect the categoriaBienCveCategoria is not set with the value in #{categoriaBienCveCategoriaFor}, and that makes my validation rule useless.

But I found a weird workaround, if I change:

<param name="categoriaBienCveCategoria" value="#{categoriaBienCveCategoriaFor}"/>

to

<param name="categoriaBienCveCategoria" value="#{categoriaBienCveCategoriaFor+0}"/>

Everything works fine (and the WARN dissapears) I think this is a bug in the way Seam 2.1.0SP1 is dealing with conversions, I think that maybe seam is failing to converte categoriaBienCveCategoriaFor from String to Long, to match the setter of categoriaBienCveCategoria.


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