Facelets variable injection?

[paradigmza]

Hello,

I am busy building a custom facelets component that I will use like this

<tns:autoForm compvar="#{testList}"/>
<tns:autoForm compvar="#{anotherTestList}"/>

Where testList and anotherTestList are List objects that has been outjected by seam.

Now on the component side of things I can use the variable "compvar"

<h:dataTable var="item" value="#{compvar}">
.
.
.
</h:dataTable>
<h:outputText value="#{helper.compVarSize}/>"

Now the trouble I have is with my "helper" component that has the method getCompVarSize()... I need access to whichever variable is passed to my component (testList or anotherTestList).
Idealy I would like to write this piece of code

@Name("helper")
public class SomeExample {

 @In
 List compvar; // this does not work

 public String getCompVarSize() {
 ...
 }
}

This of course does not work becasue compvar is not a seam component... does any one know how I can do this?

Thanks.
Sean.

[matt.drees]

Give this a shot.

@In("#{compvar}")

[paradigmza]

No luck :-(

[sjmenden]

I've ran into a similar problem as you Sean in a previous problem I was tackling, you will need to create a custom facelet tag to expose the varible in the faceletContext to the facesContext, which then you may be able to bind it a MethodExpression. The solution I came up with was not pretty and hacked the private VariableMapper of the faceletContext, but I'd be happy to share it with you if you'd like.

-Samuel

[pmuir]

You can't and shouldn't do that. Use EL functions.

[paradigmza]

Hi pete,

I am not quite sure what you mean by use EL functions? can you give an example?

Thanks.

[paradigmza]

Nevermind,

I thougtht there was some special el tag that put a variable onto the session... but I see what you mean now.

#{helper.setListToUse(compvar)}

Thanks... so simple... but taken days to figure out (digging into all sort of stuff)

ps. Jboss Tools is awesome.

[pmuir]

No. You should not inject render time variables into your backing beans.

Just do

#{my:compare(var1, var2)} - this is all in the facelets documentation.