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From Rafael Pestano <rmpest...@yahoo.com.br>
Subject Re: Custom tag
Date Fri, 29 Jun 2012 02:12:00 GMT
you can try:

<cc:implementation>

    <h:commandButton
                value="Ok" rendered="#{not empty cc.attrs.action and empty cc.attrs.actionListener}"
                action="#{cc.attrs.action}"               
    />


  <h:commandButton
                value="Ok" rendered="#{not empty cc.attrs.actionListener and empty cc.attrs.action}"
                actionListener="#{cc.attrs.actionListener}"  
                action="#{cc.attrs.action}"            
    />

  <h:commandButton
                value="Ok" rendered="#{not empty cc.attrs.actionListener and not
empty cc.attrs.action}"
                actionListener="#{cc.attrs.actionListener}"             
    />

</cc:implementation>



maybe it helps.

Att, 

Rafael M. Pestano

Desenvolvedor Java Cia. de Processamento de Dados do Rio Grande do Sul
Graduando em Ciência da Computação UFRGS
http://code.google.com/p/jsf-conventions-framework/
http://rpestano.wordpress.com
http://twitter.com/realpestano



________________________________
De: José Luis Cetina <maxtorzito@gmail.com>
Para: MyFaces Discussion <users@myfaces.apache.org> 
Enviadas: Quinta-feira, 28 de Junho de 2012 18:28
Assunto: Custom tag

Hi i have this:

Simple custom tag:

<cc: interface componentType="my_button" >
  <cc:attribute name="action" method-signature="java.lang.String action()"/>
  <cc:attribute name="actionListener" method-signature="void
actionListener(javax.faces.event.ActionEvent event)"/>
</ cc:interface>

<cc:implementation>
    <h:commandButton
                value="Ok"
                action="#{cc.attrs.action}"
                actionListener="#{cc.attrs.actionListener}"
     />
</cc:implementation>

Then in my page i do:

<mytags:mybutton action="#{myBean.actionMethod}"/>

But i get a NullPointerException, this is because im not setting the
actionListener attribute, but the thing is that sometimes i need or
only action or actionlistener not both, but i have to provided both if
not i get the nullpointer.


I have to do this, but the listener method is empty in my managedbean,
i only do this for avoid the nullpointer.
<mytags:mybutton action="#{myBean.actionMethod}"
actionListener="#{myBean.actionListenerMethod}"/>

how can i avoid this?

Thanks

-------------------------------------------------------------------
SCJA. José Luis Cetina
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