tim/prune/function/gpsies/GpsiesXmlHandler.java

   1 package tim.prune.function.gpsies;
   2
   3 import java.util.ArrayList;
   4
   5 import org.xml.sax.Attributes;
   6 import org.xml.sax.SAXException;
   7 import org.xml.sax.helpers.DefaultHandler;
   8
   9 /**
  10  * XML handler for dealing with XML returned from gpsies.com
  11  */
  12 public class GpsiesXmlHandler extends DefaultHandler
  13 {
  14         private boolean _inTracks = false;
  15         private boolean _inTrack = false;
  16         private boolean _inTrackName = false;
  17         private boolean _inDescription = false;
  18         private boolean _inFileId = false;
  19         private boolean _inTrackLength = false;
  20         private boolean _inLink = false;
  21         private String _value = null;
  22         private ArrayList<GpsiesTrack> _trackList = null;
  23         private GpsiesTrack _track = null;
  24
  25
  26         /**
  27          * React to the start of an XML tag
  28          */
  29         public void startElement(String inUri, String inLocalName, String inTagName,
  30                 Attributes inAttributes) throws SAXException
  31         {
  32                 if (inTagName.equals("tracks")) {
  33                         _inTracks = true;
  34                         _trackList = new ArrayList<GpsiesTrack>();
  35                 }
  36                 else if (_inTracks && inTagName.equals("track")) {
  37                         _inTrack = true;
  38                         _track = new GpsiesTrack();
  39                 }
  40                 else if (_inTrack && inTagName.equals("title")) {_inTrackName = true;}
  41                 else if (_inTrack && inTagName.equals("description")) {_inDescription = true;}
  42                 else if (_inTrack && inTagName.equals("fileId")) {_inFileId = true;}
  43                 else if (_inTrack && inTagName.equals("trackLengthM")) {_inTrackLength = true;}
  44                 else if (_inTrack && inTagName.equals("downloadLink")) {_inLink = true;}
  45                 super.startElement(inUri, inLocalName, inTagName, inAttributes);
  46         }
  47
  48         /**
  49          * React to the end of an XML tag
  50          */
  51         public void endElement(String inUri, String inLocalName, String inTagName)
  52         throws SAXException
  53         {
  54                 if (inTagName.equals("tracks")) {_inTracks = false;}
  55                 else if (_inTrack && inTagName.equals("track")) {
  56                         _trackList.add(_track);
  57                         _inTrack = false;
  58                 }
  59                 else if (_inTrackName && inTagName.equals("title")) {
  60                         _track.setTrackName(_value);
  61                         _inTrackName = false;
  62                 }
  63                 else if (_inDescription && inTagName.equals("description")) {
  64                         _track.setDescription(_value);
  65                         _inDescription = false;
  66                 }
  67                 else if (_inFileId && inTagName.equals("fileId")) {
  68                         _track.setFileId(_value);
  69                         _inFileId = false;
  70                 }
  71                 else if (_inTrackLength && inTagName.equals("trackLengthM")) {
  72                         try {
  73                                 _track.setLength(Double.parseDouble(_value));
  74                         }
  75                         catch (NumberFormatException nfe) {}
  76                         _inTrackLength = false;
  77                 }
  78                 else if (_inLink && inTagName.equals("downloadLink")) {
  79                         _track.setDownloadLink(_value);
  80                         _inLink = false;
  81                 }
  82                 super.endElement(inUri, inLocalName, inTagName);
  83         }
  84
  85         /**
  86          * React to characters received inside tags
  87          */
  88         public void characters(char[] inCh, int inStart, int inLength)
  89         throws SAXException
  90         {
  91                 _value = new String(inCh, inStart, inLength);
  92                 // System.out.println("Value: '" + value + "'");
  93                 // TODO: Note, this doesn't cope well with split characters for really long descriptions etc
  94                 super.characters(inCh, inStart, inLength);
  95         }
  96
  97         /**
  98          * @return the list of tracks
  99          */
 100         public ArrayList<GpsiesTrack> getTrackList()
 101         {
 102                 return _trackList;
 103         }
 104 }