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package javax.faces.view;
import javax.faces.FacesWrapper;
/**
* ViewDeclarationLanguageFactory
* is a factory object that creates (if needed) and returns a new {@link
* ViewDeclarationLanguage} instance based on the VDL found in a
* specific view.
*
*
*
* There must be one ViewDeclarationLanguageFactory instance per web
* application that is utilizing JavaServer Faces. This instance can be
* acquired, in a portable manner, by calling:
*
*
* ViewDeclarationLanguageFactory factory = (ViewDeclarationLanguageFactory)
* FactoryFinder.getFactory(FactoryFinder.VIEW_DECLARATION_LANGUAGE_FACTORY);
*
*
*
*
* @since 2.0
*/
public abstract class ViewDeclarationLanguageFactory implements FacesWrapper {
/**
* If this factory has been decorated, the
* implementation doing the decorating may override this method to provide
* access to the implementation being wrapped. A default implementation
* is provided that returns null.
*/
public ViewDeclarationLanguageFactory getWrapped() {
return null;
}
/**
* Return the
* ViewDeclarationLanguage instance suitable for
* handling the VDL contained in the page referenced by the argument
* viewId. The default implementation must return a
* valid ViewDeclarationLanguage instance for views
* written in either JSP, Faces XML Views, or Facelets for JSF
* 2.
*
* @param viewId the viewId to be inspected for an appropriate
* ViewDeclarationLanguage implementation for the VDL used
* in the view.
*
* @since 2.0
*
* @throws NullPointerException if viewId is null.
*
*/
public abstract ViewDeclarationLanguage getViewDeclarationLanguage(String viewId);
}