/**
* Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onebusaway.transit_data_federation_webapp.controllers;
import java.util.ArrayList;
import java.util.List;
import org.onebusaway.geospatial.model.CoordinateBounds;
import org.onebusaway.geospatial.model.CoordinatePoint;
import org.onebusaway.geospatial.services.SphericalGeometryLibrary;
import org.onebusaway.gtfs.model.AgencyAndId;
import org.onebusaway.transit_data.model.realtime.CurrentVehicleEstimateQueryBean;
import org.onebusaway.transit_data.model.realtime.CurrentVehicleEstimateQueryBean.Record;
import org.onebusaway.transit_data_federation.model.TargetTime;
import org.onebusaway.transit_data_federation.services.AgencyAndIdLibrary;
import org.onebusaway.transit_data_federation.services.realtime.BlockLocation;
import org.onebusaway.transit_data_federation.services.realtime.BlockLocationService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/simulate-vehicle-locations.action")
public class SimulateVehicleLocationsController {
@Autowired
private BlockLocationService _blockLocationService;
@RequestMapping()
public ModelAndView index(@RequestParam() String vehicleId,
@RequestParam(defaultValue = "0.0") double noise) {
AgencyAndId vid = AgencyAndIdLibrary.convertFromString(vehicleId);
CurrentVehicleEstimateQueryBean bean = new CurrentVehicleEstimateQueryBean();
long time = System.currentTimeMillis();
List<Record> records = new ArrayList<Record>();
for (int i = 0; i < 5 * 60; i += 30) {
TargetTime tt = new TargetTime(time - i * 1000);
BlockLocation location = _blockLocationService.getLocationForVehicleAndTime(
vid, tt);
if (location != null) {
CoordinatePoint p = applyNoiseToLocation(location.getLocation(), noise);
Record r = new Record();
r.setLocation(location.getLocation());
r.setTimestamp(tt.getTargetTime());
r.setLocation(p);
r.setAccuracy(noise);
records.add(r);
}
}
bean.setRecords(records);
ModelAndView mv = new ModelAndView("simulate-vehicle-locations.jspx");
mv.addObject("time", time);
mv.addObject("query", bean);
return mv;
}
private CoordinatePoint applyNoiseToLocation(CoordinatePoint location,
double noise) {
CoordinateBounds b = SphericalGeometryLibrary.bounds(location, noise);
double latSpan = b.getMaxLat() - b.getMinLat();
double lonSpan = b.getMaxLon() - b.getMinLon();
double lat = b.getMinLat() + Math.random() * latSpan;
double lon = b.getMinLon() + Math.random() * lonSpan;
return new CoordinatePoint(lat, lon);
}
}