api.Controller.java Source code

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Here is the source code for api.Controller.java

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/*
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 * and open the template in the editor.
 */
package api;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

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

import nearestFinder.Bound;
import nearestFinder.County;
import nearestFinder.RTree;

import org.json.JSONObject;
import org.json.JSONArray;

import test.Test;

/**
 *
 * @author fcarterwheatley
 */
public class Controller extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //API responds with JSON
        response.setContentType("application/json");

        try (PrintWriter out = response.getWriter()) {
            //Perform different operations based on the path that was requested
            JSONObject data = new JSONObject();
            switch (request.getRequestURI()) {
            case "/getNearestKLocationsAtCounty":
                data.put("ok", Test.getNearestKLocationsAtCounty());
                break;
            case "/getLocationsInBound":
                float low_lat = Float.parseFloat(request.getParameter("low_lat"));
                float low_long = Float.parseFloat(request.getParameter("low_long"));
                float high_lat = Float.parseFloat(request.getParameter("high_lat"));
                float high_long = Float.parseFloat(request.getParameter("high_long"));
                ArrayList<County> result = FileLoader.tree
                        .getLocationsInBound(new Bound(low_long, high_long, low_lat, high_lat));
                ArrayList<JSONObject> results = new ArrayList<JSONObject>();
                for (County c : result) {
                    JSONObject temp = new JSONObject();
                    temp.put("long", c.lon);
                    temp.put("lat", c.lat);
                    temp.put("state", c.state);
                    temp.put("title", c.title);
                    results.add(temp);
                }
                data.put("results", results);
                break;
            case "/getLocationsAtCounty":
                data.put("ok", Test.getLocationsAtCounty());
                break;
            case "/getNearestKLocationsAtCoord":
                float lat = Float.parseFloat(request.getParameter("lat"));
                float lng = Float.parseFloat(request.getParameter("long"));
                int k = Integer.parseInt(request.getParameter("k"));
                ArrayList<County> kResult = FileLoader.tree.getNearestKLocationsAtPoint(lng, lat, k);
                ArrayList<JSONObject> kJSONResults = new ArrayList<JSONObject>();
                for (County c : kResult) {
                    JSONObject temp = new JSONObject();
                    temp.put("long", c.lon);
                    temp.put("lat", c.lat);
                    temp.put("state", c.state);
                    temp.put("title", c.title);
                    kJSONResults.add(temp);
                }
                data.put("results", kJSONResults);
                break;
            case "/isWithinBound":
                int x = Integer.parseInt(request.getParameter("locationX"));
                int y = Integer.parseInt(request.getParameter("locationY"));
                data.put("mouseX", x);
                data.put("mouseY", y);
                data.put("ok", Test.isWithinBound(x, y));
                break;
            default:
                JSONArray endpoints = new JSONArray();
                endpoints.put("/NearestFinderServer/getNearestKLocationsAtCounty");
                endpoints.put("/NearestFinderServer/getLocationsInBound");
                endpoints.put("/NearestFinderServer/getLocationsAtCounty");
                endpoints.put("/NearestFinderServer/getNearestKLocationsAtCoord");
                endpoints.put("/NearestFinderServer/isWithinBound");

                data.put("error", "request not recognized");
                data.put("available endpoints", endpoints);
                break;
            }
            out.println(data);
        }
    }

    // <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
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    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
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Controller for the various API methods that are exposed.";
    }// </editor-fold>

}