NullPointer when using dynamic actionListener type

[Döring Markus <Ma...@tcc-products.de>]

Hello,
i try to add <f:actionListener /> to <tr:commandButton /> within <tr:forEach>.
The type of the actionListener is dynamic, so I use an EL-Expression.
When trinidad adds the actionListener the following exception is thrown:



16:25:30,154 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
	at org.apache.myfaces.trinidad.component.UIXComponentBase.addFacesListener(UIXComponentBase.java:969)
	at org.apache.myfaces.trinidad.component.UIXCommand.addActionListener(UIXCommand.java:279)
	at org.apache.myfaces.taglib.core.ActionListenerTag.doStartTag(ActionListenerTag.java:83)




Here is some of my code:

Test.jspx:
<tr:forEach var="action" items="#{managedBean.actions}">
	<tr:commandButton text="#{action}">
		<f:actionListener type="#{managedBean.actionMap[action]}" />
	</tr:commandButton>
</tr:forEach>

managedBean:
public class ManagedBean {
	public List<String> getActions() {
		List<String> out = new ArrayList<String>();
		out.add("action1");
		out.add("action2");
		return out;
	}

	public Map<String, String> getActionMap() {
		Map<String, String> out = new HashMap<String, String>();
		out.put("action1", Action1.class.getName());
		out.put("action2", Action2,class.getName());
	}
}

When I use the code without the <f:actionListener> line everything works fine, the buttons are rendered with the right text

So what's going wrong here? Or is it me doing something wrong?

Greetings
Markus

PS. I'm using Trinidad M1, MyFaces 1.1.4 and JBoss 4.0.3SP1 with Tomcat 5.5

Re: NullPointer when using dynamic actionListener type

[Adam Winer <aw...@gmail.com>]

tr:forEach only works with other tr: tags - not f:actionListener.

In JSP 2.1 or in Facelets, you can use c:forEach with all tags, but
by the nature of how tr:forEach works, it can't work across all
tags like they can.

-- Adam



On 9/25/06, Döring Markus <Ma...@tcc-products.de> wrote:
> Hello,
> i try to add <f:actionListener /> to <tr:commandButton /> within <tr:forEach>.
> The type of the actionListener is dynamic, so I use an EL-Expression.
> When trinidad adds the actionListener the following exception is thrown:
>
>
>
> 16:25:30,154 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
> java.lang.NullPointerException
>         at org.apache.myfaces.trinidad.component.UIXComponentBase.addFacesListener(UIXComponentBase.java:969)
>         at org.apache.myfaces.trinidad.component.UIXCommand.addActionListener(UIXCommand.java:279)
>         at org.apache.myfaces.taglib.core.ActionListenerTag.doStartTag(ActionListenerTag.java:83)
>
>
>
>
> Here is some of my code:
>
> Test.jspx:
> <tr:forEach var="action" items="#{managedBean.actions}">
>         <tr:commandButton text="#{action}">
>                 <f:actionListener type="#{managedBean.actionMap[action]}" />
>         </tr:commandButton>
> </tr:forEach>
>
> managedBean:
> public class ManagedBean {
>         public List<String> getActions() {
>                 List<String> out = new ArrayList<String>();
>                 out.add("action1");
>                 out.add("action2");
>                 return out;
>         }
>
>         public Map<String, String> getActionMap() {
>                 Map<String, String> out = new HashMap<String, String>();
>                 out.put("action1", Action1.class.getName());
>                 out.put("action2", Action2,class.getName());
>         }
> }
>
> When I use the code without the <f:actionListener> line everything works fine, the buttons are rendered with the right text
>
> So what's going wrong here? Or is it me doing something wrong?
>
> Greetings
> Markus
>
> PS. I'm using Trinidad M1, MyFaces 1.1.4 and JBoss 4.0.3SP1 with Tomcat 5.5
>