src/tim/prune/function/OpenCachingDeXmlHandler.java

   1 package tim.prune.function;
   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 import tim.prune.function.search.SearchResult;
  10
  11 /**
  12  * XML handler for dealing with XML returned from the opencaching.de api
  13  */
  14 public class OpenCachingDeXmlHandler extends DefaultHandler
  15 {
  16         private String _value = null;
  17         private ArrayList<SearchResult> _trackList = null;
  18         private SearchResult _track = null;
  19         private String _errorMessage = null;
  20
  21
  22         /**
  23          * React to the start of an XML tag
  24          */
  25         public void startElement(String inUri, String inLocalName, String inTagName,
  26                 Attributes inAttributes) throws SAXException
  27         {
  28                 if (inTagName.equals("result")) {
  29                         _trackList = new ArrayList<SearchResult>();
  30                 }
  31                 else if (inTagName.equals("cache"))
  32                 {
  33                         _track = new SearchResult();
  34                 }
  35 //              else if (inTagName.equals("status")) {
  36 //                      _errorMessage = inAttributes.getValue("message");
  37 //              }
  38                 else _value = null;
  39                 super.startElement(inUri, inLocalName, inTagName, inAttributes);
  40         }
  41
  42         /**
  43          * React to the end of an XML tag
  44          */
  45         public void endElement(String inUri, String inLocalName, String inTagName)
  46         throws SAXException
  47         {
  48                 if (inTagName.equals("cache"))
  49                 {
  50                         // end of the entry
  51                         _trackList.add(_track);
  52                 }
  53                 else if (inTagName.equals("name")) {
  54                         _track.setTrackName(_value);
  55                 }
  56                 else if (inTagName.equals("desc")) {
  57                         _track.setDescription(_value);
  58                 }
  59                 else if (inTagName.equals("lat")) {
  60                         _track.setLatitude(_value);
  61                 }
  62                 else if (inTagName.equals("lon")) {
  63                         _track.setLongitude(_value);
  64                 }
  65                 else if (inTagName.equals("distance")) {
  66                         try {
  67                                 _track.setLength(Double.parseDouble(_value) * 1000.0); // convert from km to m
  68                         }
  69                         catch (NumberFormatException nfe) {}
  70                 }
  71                 else if (inTagName.equals("link")) {
  72                         _track.setWebUrl(_value);
  73                 }
  74                 super.endElement(inUri, inLocalName, inTagName);
  75         }
  76
  77         /**
  78          * React to characters received inside tags
  79          */
  80         public void characters(char[] inCh, int inStart, int inLength)
  81         throws SAXException
  82         {
  83                 String value = new String(inCh, inStart, inLength);
  84                 _value = (_value==null?value:_value+value);
  85                 super.characters(inCh, inStart, inLength);
  86         }
  87
  88         /**
  89          * @return the list of tracks
  90          */
  91         public ArrayList<SearchResult> getTrackList()
  92         {
  93                 return _trackList;
  94         }
  95
  96         /**
  97          * @return error message, if any
  98          */
  99         public String getErrorMessage() {
 100                 return _errorMessage;
 101         }
 102 }