uservalidator.java

使用OSGi框架开发的分布式电子辞典

/*
 * @(#)UserValidator.java
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package cn.edu.ynu.sei.dict.web.data;

import cn.edu.ynu.sei.dict.core.service.User;
import cn.edu.ynu.sei.dict.plugin.db.connector.service.IDatabaseConnector;
import cn.edu.ynu.sei.dict.plugin.user.UserManager;
import cn.edu.ynu.sei.dict.plugin.user.service.IUserManager;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.osgi.framework.ServiceReference;

/**
 * User information validator.
 * @author zy
 * @author 88250
 * @version 1.0.0.1, Mar 13, 2008 
 */
public class UserValidator extends HttpServlet {

    private ServiceReference serviceReference;
    private IUserManager userManager;

    /**
     * Constructor with argument.
     * @param sr OSGi service reference
     */
    public UserValidator(ServiceReference sr,IUserManager um) {
        this.serviceReference = sr;
        this.userManager = um;
    }

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String name = request.getParameter("name");
            String email = request.getParameter("email");
            String password = request.getParameter("password");
            List<User> userList = userManager.findAll();
            for (User u : userList) {
                if (u.name.equals(name)) {
                    out.write("0");
                    return;
                } else if (u.email.equals(email)) {
                    out.write("1");
                    return;
                }
            }
            User user = new User(name, password, email,null);
            userManager.persistUser(user);
            HttpSession session = request.getSession();
            session.setAttribute("user", user);
            out.write("2");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
}