Viewcriteria question

I am using Jdeveloper 11g R (11.1.2.3) & weblogic 10 G

In my pages I use JSF & Facelet

Hi In my application module I have a method that query some view object view criteria like this:

        ViewObjectImpl someVW = getRefPathwayReqNameViewQ1();

        VariableValueManager someVVM = someVW.ensureVariableManager();

        someVVM.clearVariables();

        someVVM.setVariableValue("refoid", refOid);

        ViewCriteria someVC = someVW.getViewCriteria("searchById");

        someVW.applyViewCriteria(someVC);

        someVW.executeQuery();

My question :

is Viewcriteria API  enough clever to clear current viewcriteria if I use this view object and try to query with another viewcriteria?

or every time I need to remove view criteria  using removeApplyviewcriteria?

Thanks