Package my.servlets

Source Code of my.servlets.TaxiStationController

package my.servlets;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import my.beans.TaxiDriver;
import share.utils.StringUtils;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

/**
* Servlet implementation class TaxiStationController
*/
public class TaxiStationController extends HttpServlet {
  private static final long serialVersionUID = 1L;
  private static HashMap taxiDrivers;
      
    /**
     * @see HttpServlet#HttpServlet()
     */
    public TaxiStationController() {
        super();
        // TODO Auto-generated constructor stub
    }

  /**
   * @see Servlet#init(ServletConfig)
   */
  public void init(ServletConfig config) throws ServletException {
    // TODO Auto-generated method stub
taxiDrivers = new HashMap();
   
    TaxiDriver driver = new TaxiDriver("1", "John Doe", "1111", "4153381200", "37.720595", "-122.476080");
    taxiDrivers.put("1", driver);
 
    driver = new TaxiDriver("2", "Jack Washington", "2222", "4153381201", "37.742131", "-122.491682");
    taxiDrivers.put("2", driver);
   
    driver = new TaxiDriver("3", "Ken Peterson", "3333", "4153381202", "37.727977", "-122.476268");
    taxiDrivers.put("3", driver);
   
    driver = new TaxiDriver("4", "John Doe", "4444", "4153381203", "37.720678", "-122.480930");
    taxiDrivers.put("4", driver);
 
    driver = new TaxiDriver("5", "Kelly Clarkson", "5555", "4153381204", "37.746630", "-122.474682");
    taxiDrivers.put("5", driver);
   
    driver = new TaxiDriver("6", "May Deng", "6666", "4153381205", "37.732431", "-122.477482");
    taxiDrivers.put("6", driver);

  }

  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doPost(request, response);
  }

  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
   
    String action = StringUtils.getTrimWhiteSpaces(request.getParameter("action"));
    String id = "";
    TaxiDriver driver = new TaxiDriver();
    Gson gson = new Gson();
    
    String lat = StringUtils.getTrimWhiteSpaces(request.getParameter("lat"));
    String lon = StringUtils.getTrimWhiteSpaces(request.getParameter("lon"));
   
    if (action.equals("set"))
    {
      id = StringUtils.getTrimWhiteSpaces(request.getParameter("id"));
     
      driver = (TaxiDriver) taxiDrivers.get(id);
     
      if (driver != null)
      { 
        if (!lat.equals("") && !lon.equals(""))
        {
          driver.setCurrentLatitude(lat);
          driver.setCurrentLongitude(lon);
       
          taxiDrivers.put(id, driver);
        }
      }
    }
    else if (action.equals("json"))
    {
      String name = "";
      String phone = "";
      String locations = "";
     
      List<TaxiDriver> drivers = new ArrayList<TaxiDriver>();
     
      PrintWriter out = response.getWriter();
     
      Iterator iterator = taxiDrivers.keySet().iterator();
        while (iterator.hasNext()) {
          id = (String) iterator.next();
         
          driver = (TaxiDriver) taxiDrivers.get(id);
          drivers.add(driver);
       
        }
       
        gson = new Gson();
        String jsonDrivers = gson.toJson(drivers);
        out.println(jsonDrivers);
        out.flush();
     
    }
    else if (action.equals("html"))
    {
      String name = "";
      String phone = "";
      String locations = "";
     
      response.setContentType("text/html");
     
      PrintWriter out = response.getWriter();
     
      out.println("<html>");
      out.println("<head>");
      out.println("<title>Display All Driver GPS Location</title>");
      out.println("</head>");
      out.println("<body>");
      out.println("<table border='1' cellpadding='5' cellspacing='5'>");
      out.println("<tr>");
      out.println("<th>Driver ID</th>");
      out.println("<th>Name</th>");
      out.println("<th>Phone</th>");
      out.println("<th>Locations (lat/long)</th>");
      out.println("</tr>");
     
      Iterator iterator = taxiDrivers.keySet().iterator();
        while (iterator.hasNext()) {
          out.println("<tr>");
          id = (String) iterator.next();
         
          driver = (TaxiDriver) taxiDrivers.get(id);
          name = driver.getName();
          phone = driver.getPhoneNumber();
          locations = driver.getCurrentLatitude() + ";" + driver.getCurrentLongitude();
         
          out.println("<td align='center'>" + id + "</td>");
          out.println("<td align='center'>" + name + "</td>");
          out.println("<td align='center'>" + phone + "</td>");
          out.println("<td align='right'>" + locations + "</td>");
         
          out.println("</tr>");
        }
       
        out.println("</table>");
        out.println("</body>");
        out.println("</html>");
        out.close();
       
     
    }
  }

}
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