src/main/java/osm/jp/gpx/GpxParser.java

   1 package osm.jp.gpx;
   2
   3 import java.text.ParseException;
   4 import org.xml.sax.Attributes;
   5 import org.xml.sax.helpers.DefaultHandler;
   6
   7 /**
   8  * GPXファイルをパースする
   9  * @param gpxFile
  10  * @code{
  11  * <gpx>
  12  *   <trk>
  13  *     <trkseg>
  14  *       <trkpt lat="35.32123832" lon="139.56965631">
  15  *         <ele>47.20000076293945</ele>
  16  *         <time>2012-06-15T03:00:29Z</time>
  17  *         <hdop>0.5</hdop>
  18  *       </trkpt>
  19  *     </trkseg>
  20  *   </trk>
  21  * </gpx>
  22  * }
  23  *
  24  */
  25 public class GpxParser extends DefaultHandler {
  26         StringBuffer outSb;
  27         int segCnt = 0;
  28         int kptCnt = 0;
  29         boolean kpt = false;
  30         TagTrkpt tag = null;
  31         public ElementMapTRKPT trkpt;
  32         public ElementMapTRKSEG trkseg = new ElementMapTRKSEG();
  33
  34     AppParameters params;
  35
  36     public GpxParser(AppParameters params) {
  37         super();
  38         this.params = params;
  39         trkpt = new ElementMapTRKPT(params);
  40     }
  41
  42         /**
  43      * ドキュメント開始
  44      */
  45     public void startDocument() {
  46         outSb = new StringBuffer();
  47     }
  48
  49     /**
  50      * ドキュメント終了
  51      */
  52     public void endDocument() {
  53     }
  54
  55     public void startElement(String uri,String localName, String qName, Attributes atts) {
  56                 if(qName.equals("trkseg")){
  57                         segCnt++;
  58                         kptCnt = 0;
  59                         if (trkpt.size() > 0) {
  60                                 trkpt.printinfo();
  61                                 trkseg.put((ElementMapTRKPT) trkpt.clone());
  62                                 trkpt.clear();
  63                         }
  64                 }
  65                 if(qName.equals("trkpt")){
  66                         kpt = true;
  67                         kptCnt++;
  68                         if (tag != null) {
  69                                 if (tag.getTime() != null) {
  70                                         trkpt.put(tag.clone());
  71                                 }
  72                                 tag = null;
  73                         }
  74
  75                         Double lat = null;
  76                     Double lon = null;
  77
  78                         for (int i = 0; i < atts.getLength(); i++) {
  79                                 String aname = atts.getQName(i);
  80                                 if (aname.equals("lat")) {
  81                                         lat = new Double(atts.getValue(i));
  82                                 }
  83                                 if (aname.equals("lon")) {
  84                                         lon = new Double(atts.getValue(i));
  85                                 }
  86                         }
  87
  88                         if ((lat != null) && (lon != null)) {
  89                                 tag = new TagTrkpt(lat, lon);
  90                         }
  91                 }
  92                 if(qName.equals("ele")){
  93                         outSb = new StringBuffer();
  94                 }
  95                 if(qName.equals("time")){
  96                         outSb = new StringBuffer();
  97                 }
  98                 if(qName.equals("magvar")){
  99                         outSb = new StringBuffer();
 100                 }
 101                 if(qName.equals("speed")){
 102                         outSb = new StringBuffer();
 103                 }
 104         }
 105
 106     /**
 107      * 要素の終了タグ読み込み時に毎回呼ばれる
 108      */
 109     public void endElement(String uri,String localName,String qName) {
 110         if(qName.equals("trkseg")){
 111                         if (trkpt.size() > 0) {
 112                                 trkseg.put((ElementMapTRKPT) trkpt.clone());
 113                                 trkpt.clear();
 114                         }
 115         }
 116         if(qName.equals("trkpt")){
 117                 kpt = false;
 118                         if (tag != null) {
 119                                 if (tag.getTime() != null) {
 120                                         trkpt.put(tag);
 121                                 }
 122                                 tag = null;
 123                         }
 124         }
 125                 if(qName.equals("ele")){
 126                         tag.setEle(outSb.toString());
 127                 }
 128                 if(qName.equals("time")){
 129                         try {
 130                                 tag.setTime(ImportPicture.toUTCDate(outSb.toString()));
 131                         } catch (ParseException e) {}
 132                 }
 133                 if(qName.equals("magvar")){
 134                         tag.setMagvar(outSb.toString());
 135                 }
 136                 if(qName.equals("speed")){
 137                         tag.setSpeed(outSb.toString());
 138                 }
 139                 outSb = new StringBuffer();
 140     }
 141
 142     /**
 143      * テキストデータ読み込み時に毎回呼ばれる
 144      */
 145     public void characters(char[] ch, int offset, int length) {
 146         if (kpt) {
 147             outSb.append(new String(ch, offset, length));
 148         }
 149     }
 150
 151  }