getattentionlist.java

使用OSGi框架开发的分布式电子辞典

/*
 * @(#)GetAttentionList.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.user.service.IUserManager;
import java.io.*;

import java.util.List;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 * Get the attention list of a particular user.
 * @author zy
 * @version 1.0.0.0, Mar 14, 2008
 */
public class GetAttentionList extends HttpServlet {
    
    private IUserManager userManager;
    
    /**
     * default constructor.
     */
    public GetAttentionList(){
        
    }
    
    /**
     * constructor with argument.
     * @param userManager
     *         the interface of user management.
     */
    public GetAttentionList(IUserManager userManager){
        this.userManager = userManager;
    }
   
    /** 
    * 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();
        HttpSession session = request.getSession();
        User user = (User)session.getAttribute("user");
        List<String> ns = userManager.findAllSubscriptions(user.name);
        String startIndex;
        if(ns.size() == 0){
            startIndex = user.name;
        }
        else{
            startIndex = ns.get(ns.size()-1);
        }
        String output = "<br><h2>My Friend</h2>" +
                "<input id='newfriend' type='text' size='18'/>" +
                "<input type='button' value='Add'  onclick=\"addItem('newfriend','" + startIndex +"')\"/><form id='checklist' name='alform'>" +
                "<div>" + "朗道英汉字典5.0" + "<input type='radio' name='rlist' value='ld' checked/></div>" +
                "<div id='" + user.name + "'>" + user.name + "<input type='radio' name='rlist' value='" + user.name + "'/></div>";
        for(int i = 0;i<ns.size();i++){
            output += "<div id='" + ns.get(i) +"'>" + ns.get(i) 
                    + "<input type='radio' name='rlist' value='" 
                    + ns.get(i) + "'/>"
                    + "<a href='#' onclick=\"deleteItem('" + ns.get(i) + "')\" title='Delete Friend' style='text-decoration:none; padding-left:80px'>" +
                    "<img src='DelFriend.gif' alt='Delete Friend' width='12' height='5' border='0' /></a></div>";
        }
        output += "</form>";
        out.write(output);
    } 

    // <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>
}