invoke javax.el.MethodExpression from jsf component

Question

I have a jsp tag which takes a javax.el.MethodExpression as attribute:

<%@ attribute name="action" required="true" type="javax.el.MethodExpression" rtexprvalue="true" %>

within the same tag I have:

<h:commandLink action="#{action}">
    link text
</h:commandLink>

I'm getting the following error when I try to click the link:

javax.faces.FacesException: #{action}: org.apache.jasper.el.JspMethodNotFoundException: /WEB-INF/tags/pager/pager.tag(17,1) '#{action}' Identity 'action' was null and was unable to invoke

is it possible for the commandLink to properly invoke the "action" method?

score 2 · Answer 1 · answered Mar 30 '10 at 18:51

2

It's been a while since I did JSF, but I'm pretty sure a method expression is of the form: #{bean.method}. You can't just say #{method}.

answered Mar 30 '10 at 18:51

noah

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yes, i'm passing the method to the tag i created: and within the tag, i have to asign this method to the command link – marcosbeirigo Mar 30 '10 at 18:54
1

Yea, that wont work. You can't pass method expressions around like that. – noah Mar 30 '10 at 18:59

BalusC · Accepted Answer · 2011-12-28T19:46:47.967

2

Don't create a JSP tag. Create a JSF component. Extend UIComponentELTag. Tutorials here.

Or, if you're using Facelets, consider a template using ui:composition. Tutorials here.

Or, if you're already on JSF 2.0, you can get a step further with composite components. Tutorial here.

edited Dec 28 '11 at 19:46

answered Mar 30 '10 at 20:34

BalusC

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invoke javax.el.MethodExpression from jsf component

2 Answers2