How to render or hide a jsf subview based on a method call (which returns boolean)?

Question

I have a context loader class which loads an XML file with info on which components to show or hide on a page. On the JSP pages, within the 'rendered' attribute for a subView,, I would like to make a call to ContextLoader.displayPageComponent(String pageId, String componentId) which returns a boolean. Does this work in JSF? If not, is there another way to achieve the same?

Which version of JSF are you using? – Drew Apr 14 '10 at 01:37 — Drew, Apr 14 '10 at 01:37

score 2 · Accepted Answer · edited May 23 '17 at 12:08

2

Wrap it in an EL function. How to do it exactly depends on the view technology in question. You can find a JSP-targeted example in this answer and a Facelets-targeted example in this answer.

edited May 23 '17 at 12:08

Community

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answered Apr 14 '10 at 12:57

BalusC

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score 1 · Answer 2 · answered Apr 13 '10 at 19:14

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The most direct way to do this would be have a backing bean with a method like this...

public boolean isRenderSubview1Comp1() {
   return ContextLoader.displayPageComponent("subview1", "comp1");
}

with

<h:outputText value="foo" rendered="#{MyBean.rednerSubview1Comp1}"/>

answered Apr 13 '10 at 19:14

Drew

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I am trying to externalize the page component configuration. So I don't want to go this route. – jsfQ Apr 13 '10 at 19:28

How to render or hide a jsf subview based on a method call (which returns boolean)?

2 Answers2