net.groupbuy.interceptor.ListInterceptor.java Source code

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Here is the source code for net.groupbuy.interceptor.ListInterceptor.java

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/*
 * Copyright 2005-2013 shopxx.net. All rights reserved.
 * Support: http://www.shopxx.net
 * License: http://www.shopxx.net/license
 */
package net.groupbuy.interceptor;

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

import net.groupbuy.util.WebUtils;

import org.apache.commons.lang.StringUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

/**
 * Interceptor - 
 * 
 * @author SHOP++ Team
 * @version 3.0
 */
public class ListInterceptor extends HandlerInterceptorAdapter {

    /** ????? */
    private static final String REDIRECT_VIEW_NAME_PREFIX = "redirect:";

    /** Cookie?? */
    private static final String LIST_QUERY_COOKIE_NAME = "listQuery";

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        if (modelAndView != null && modelAndView.isReference()) {
            String viewName = modelAndView.getViewName();
            if (StringUtils.startsWith(viewName, REDIRECT_VIEW_NAME_PREFIX)) {
                String listQuery = WebUtils.getCookie(request, LIST_QUERY_COOKIE_NAME);
                if (StringUtils.isNotEmpty(listQuery)) {
                    if (StringUtils.startsWith(listQuery, "?")) {
                        listQuery = listQuery.substring(1);
                    }
                    if (StringUtils.contains(viewName, "?")) {
                        modelAndView.setViewName(viewName + "&" + listQuery);
                    } else {
                        modelAndView.setViewName(viewName + "?" + listQuery);
                    }
                    WebUtils.removeCookie(request, response, LIST_QUERY_COOKIE_NAME);
                }
            }
        }
    }

}