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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?
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.