Spring MVC, controller interceptor

Spring MVC ControllerInterceptor

import java.lang.annotation.Annotation;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


public class ControllersInterceptor implements HandlerInterceptor {
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		return true;
	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
		this.setControllerName(handler, modelAndView);
		this.setActionName(handler, modelAndView);

	}

	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

	}


	private void setControllerName(Object handler, ModelAndView modelAndView) {
		String controllerName = "";
		if (handler instanceof HandlerMethod) {
			HandlerMethod method = (HandlerMethod) handler;
			Class clazz = method.getMethod().getDeclaringClass();
			Annotation[] annotations = clazz.getAnnotations();
			for (Annotation annotation : annotations) {
				if (annotation instanceof Controller) {
					Controller controllerAnnotation = (Controller) annotation;
					controllerName = controllerAnnotation.value();
					break;
				}
			}
		}
		if (modelAndView != null) {
			modelAndView.addObject("controllerName", controllerName);
		}
	}

	private void setActionName(Object handler, ModelAndView modelAndView) {
		String actionName = "";
		if (handler instanceof HandlerMethod) {
			HandlerMethod method = (HandlerMethod) handler;
			actionName = method.getMethod().getName();
		}
		if (modelAndView != null) {
			modelAndView.addObject("actionName", actionName);
		}
	}

}