2 * Copyright 2006 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.wamblee.gpx;
19 import java.io.InputStream;
20 import java.util.Iterator;
21 import java.util.List;
23 import org.dom4j.Document;
24 import org.dom4j.Element;
25 import org.wamblee.gps.track.Track;
26 import org.wamblee.gps.track.TrackImpl;
27 import org.wamblee.gps.track.TrackPoint;
28 import org.wamblee.gps.track.TrackSegment;
29 import org.wamblee.gps.track.TrackSegmentImpl;
30 import org.wamblee.xml.DomUtils;
31 import org.wamblee.xml.XMLException;
34 * Parser for GPX tracks.
36 * @author Erik Brakkee
38 public class GpxParser {
40 private static final String SCHEMA_RESOURCE = "gpx.xsd";
46 public Track parse(String aDescription, InputStream aIs) throws XMLException {
47 Document doc = DomUtils.convert(DomUtils.read(aIs));
48 return parse(aDescription, doc);
54 public Track parse(String aDescription, Document doc) {
55 TrackImpl result = new TrackImpl(aDescription);
56 List<Element> tracks = doc.getRootElement().elements("trk");
57 if ( tracks != null ) {
58 for (Element track: tracks) {
59 String trackName = track.elementText("name");
60 TrackSegmentImpl trackSegment = new TrackSegmentImpl(trackName);
61 result.addSegment(trackSegment);
62 List<Element> segments = track.elements("trkseg");
63 if ( segments != null ) {
64 for (Element segment: segments) {
65 parseTrackPoints(trackSegment, segment.elementIterator("trkpt"));
71 List<Element> routes = doc.getRootElement().elements("rte");
72 if ( routes != null ) {
73 for (Element route: routes) {
74 String routeName = route.elementText("desc");
75 TrackSegmentImpl trackSegment = new TrackSegmentImpl(routeName);
76 result.addSegment(trackSegment);
77 parseTrackPoints(trackSegment, route.elementIterator("rtept"));
85 private void parseTrackPoints(TrackSegmentImpl aTrack, Iterator<Element> aPoints) {
86 while (aPoints.hasNext()) {
87 Element point = aPoints.next();
88 aTrack.addPoint(parseTrackPoint(point));
96 private TrackPoint parseTrackPoint(Element trkpt) {
97 // System.out.println(trkpt.asXML() + "|\n");
98 double latitude = new Double(trkpt.attributeValue("lat"));
99 double longitude = new Double(trkpt.attributeValue("lon"));
100 Element ele = trkpt.element("ele");
101 double elevation = 0.0;
103 elevation = new Double(ele.getText());
105 // System.out.println(" lat = " + lat + " lon = " + lon + " ele = " +
107 return new TrackPoint(latitude, longitude, elevation);