jsf - Avoid conctructor recall or make it right, how? -

i have absolutely workable portlet. complicated form many popups, lazytables, tables , on. works fine. , want allow autofill fields , structures. add in constructor analizing parameter url:

renderrequest renderrequest = (renderrequest) (facescontext .getcurrentinstance()                   .getexternalcontext().getrequestmap().get("javax.portlet.request"));            string applicationindex = renderrequest.getparameter("caid"); 

and initializing structures data or default constructors.

when open popup, see them without data or buttons doesn't react on clicking. , in log:

caused by: java.lang.classcastexception: com.liferay.portlet.resourcerequestimpl cannot cast javax.portlet.renderrequest

it occurs @ line:

renderrequest renderrequest = (renderrequest)facescontext.getcurrentinstance).getexternalcontext).getrequestmap).get"javax.portlet.request"));

it first line of bean constructor.

so question is: how make constructor work correctly in circumstances?

you're casting resourcerequest, which, in portal world points resource lifecycle phase (e.g. ajax), you're casting renderrequest, tied render phase.

you might want use portletrequest, supertype of resourcerequest of renderrequest.