import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;

public class WeatherReportServlet extends HttpServlet {

    private static WeatherDesc[] testData = {
        new WeatherDesc("St. John's", 5.1, "sunny"),
        new WeatherDesc("Ottawa", -10, "snowing"),
        new WeatherDesc("Montreal", 2, "rain"),
    };

    private HashMap<String,WeatherDesc> weather
        = new HashMap<String,WeatherDesc>();

    public void init() {
        for( WeatherDesc w : testData ) {
            weather.put(w.getLocation(), w );
        }
    }

    private WeatherDesc lookup( String loc ) {
        return weather.get( loc );
    }

    protected void doGet(
        HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException
    {
        response.setContentType("text/xml");
        PrintWriter out = response.getWriter();
        String path = request.getPathInfo();
        path = path.substring(1);
        WeatherDesc w = lookup( path );
        out.println( "<?xml version='1.0'?>" );
        out.println( "<weather>" );
        out.println( "<location>" );
        out.print( w.getLocation() );
        out.println( "</location>" );
        out.println( "<temperature>" );
        out.print( w.getTemperature() );
        out.println( "</temperature>" );
        out.println( "<synopsis>" );
        out.print( w.getSynopsis() );
        out.println( "</synopsis>" );
        out.println( "</weather>" );
    }
}