/**
* 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.model;
import org.onebusaway.geospatial.model.CoordinatePoint;
import org.onebusaway.geospatial.services.SphericalGeometryLibrary;
import org.onebusaway.gtfs.model.AgencyAndId;
import org.onebusaway.gtfs.model.ShapePoint;
import java.io.Serializable;
/**
* A more memory efficient data structure for capturing a sequence of
* {@link ShapePoint} objects
*
* @author bdferris
* @see ShapePoint
*/
public class ShapePoints implements Serializable {
private static final long serialVersionUID = 1L;
private AgencyAndId shapeId;
private double[] lats;
private double[] lons;
private double[] distTraveled;
public int getSize() {
return lats.length;
}
public boolean isEmpty() {
return getSize() == 0;
}
public AgencyAndId getShapeId() {
return shapeId;
}
public void setShapeId(AgencyAndId shapeId) {
this.shapeId = shapeId;
}
public double[] getLats() {
return lats;
}
public void setLats(double[] lat) {
this.lats = lat;
}
public double getLatForIndex(int index) {
return lats[index];
}
public double[] getLons() {
return lons;
}
public void setLons(double[] lon) {
this.lons = lon;
}
public double getLonForIndex(int index) {
return lons[index];
}
public double[] getDistTraveled() {
return distTraveled;
}
public void setDistTraveled(double[] distTraveled) {
this.distTraveled = distTraveled;
}
public double getDistTraveledForIndex(int index) {
return distTraveled[index];
}
public CoordinatePoint getPointForIndex(int index) {
return new CoordinatePoint(lats[index],lons[index]);
}
public void ensureDistTraveled() {
if (distTraveled == null || distTraveled.length == 0)
return;
int n = distTraveled.length;
if (distTraveled[n - 1] > 0)
return;
double totalDistanceTraveled = 0;
double prevLat = lats[0];
double prevLon = lons[0];
for (int i = 1; i < n; i++) {
double curLat = lats[i];
double curLon = lons[i];
totalDistanceTraveled += SphericalGeometryLibrary.distance(prevLat,
prevLon, curLat, curLon);
distTraveled[i] = totalDistanceTraveled;
prevLat = curLat;
prevLon = curLon;
}
}
}