ViewHandler - Autenticação de Usuarios

/**
 * 
 */
package com.fretadoalphaville.view;

import java.io.IOException;
import java.util.Locale;

import javax.faces.FacesException;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;

import com.fretadoalphaville.entities.User;
import com.fretadoalphaville.navigation.NavigationJSPKeys;


/**
 * @author Leonardo
 *
 */
public class AuthenticatingViewHandler extends ViewHandler{

	private final ViewHandler base;
	
	public AuthenticatingViewHandler(ViewHandler base) {
		this.base = base;
	}
	
	@Override
	public UIViewRoot createView(FacesContext facesContext, String s) {
		User user = (User) facesContext.getExternalContext().getSessionMap().get("user");
	     if (user == null) 
	       s = NavigationJSPKeys.USER_LOGIN;
	 
	     return base.createView(facesContext, s);	
	}
	@Override
	public Locale calculateLocale(FacesContext arg0) {
		return this.calculateLocale(arg0);
	}

	@Override
	public String calculateRenderKitId(FacesContext arg0) {
		return this.calculateRenderKitId(arg0);
	}

	@Override
	public String getActionURL(FacesContext arg0, String arg1) {
		return this.getActionURL(arg0, arg1);
	}

	@Override
	public String getResourceURL(FacesContext arg0, String arg1) {
		return this.getResourceURL(arg0, arg1);
	}

	@Override
	public void renderView(FacesContext arg0, UIViewRoot arg1) throws IOException, FacesException {
		this.renderView(arg0, arg1);
	}

	@Override
	public UIViewRoot restoreView(FacesContext arg0, String arg1) {
		return this.restoreView(arg0,arg1);
	}

	@Override
	public void writeState(FacesContext arg0) throws IOException {
		this.writeState(arg0);		
	}
}

exception

javax.servlet.ServletException
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:156)
	org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:97)
	org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)

root cause

java.lang.StackOverflowError
	com.fretadoalphaville.view.AuthenticatingViewHandler.calculateLocale(AuthenticatingViewHandler.java:40)