1 package tim.prune.load.xml;
3 import java.util.ArrayList;
5 import org.xml.sax.Attributes;
6 import org.xml.sax.SAXException;
8 import tim.prune.data.Field;
12 * Class for handling specifics of parsing Gpx files
14 public class GpxHandler extends XmlHandler
16 private boolean _insideName = false;
17 private boolean _insideElevation = false;
18 private boolean _insideTime = false;
19 private String _name = null, _latitude = null, _longitude = null;
20 private String _elevation = null;
21 private String _time = null;
22 private ArrayList _pointList = new ArrayList();
26 * Receive the start of a tag
27 * @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
29 public void startElement(String uri, String localName, String qName,
30 Attributes attributes) throws SAXException
32 // Read the parameters for waypoints and track points
33 if (qName.equalsIgnoreCase("wpt") || qName.equalsIgnoreCase("trkpt"))
35 int numAttributes = attributes.getLength();
36 for (int i=0; i<numAttributes; i++)
38 String att = attributes.getQName(i);
39 if (att.equals("lat")) {_latitude = attributes.getValue(i);}
40 else if (att.equals("lon")) {_longitude = attributes.getValue(i);}
46 else if (qName.equalsIgnoreCase("ele"))
48 _insideElevation = true;
50 else if (qName.equalsIgnoreCase("name"))
54 else if (qName.equalsIgnoreCase("time"))
58 super.startElement(uri, localName, qName, attributes);
64 * @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
66 public void endElement(String uri, String localName, String qName)
69 if (qName.equalsIgnoreCase("wpt") || qName.equalsIgnoreCase("trkpt"))
73 else if (qName.equalsIgnoreCase("ele"))
75 _insideElevation = false;
77 else if (qName.equalsIgnoreCase("name"))
81 else if (qName.equalsIgnoreCase("time"))
85 super.endElement(uri, localName, qName);
90 * Process character text (inside tags or between them)
91 * @see org.xml.sax.ContentHandler#characters(char[], int, int)
93 public void characters(char[] ch, int start, int length)
96 String value = new String(ch, start, length);
97 if (_insideName) {_name = checkCharacters(_name, value);}
98 else if (_insideElevation) {_elevation = checkCharacters(_elevation, value);}
99 else if (_insideTime) {_time = checkCharacters(_time, value);}
100 super.characters(ch, start, length);
105 * Check to concatenate partially-received values, if necessary
106 * @param inVariable variable containing characters received until now
107 * @param inValue new value received
108 * @return concatenation
110 private static String checkCharacters(String inVariable, String inValue)
112 if (inVariable == null) {return inValue;}
113 return inVariable + inValue;
118 * Process a point, either a waypoint or track point
120 private void processPoint()
122 // Put the values into a String array matching the order in getFieldArray()
123 String[] values = new String[5];
124 values[0] = _latitude; values[1] = _longitude;
125 values[2] = _elevation; values[3] = _name;
127 _pointList.add(values);
132 * @see tim.prune.load.xml.XmlHandler#getFieldArray()
134 public Field[] getFieldArray()
136 final Field[] fields = {Field.LATITUDE, Field.LONGITUDE, Field.ALTITUDE,
137 Field.WAYPT_NAME, Field.TIMESTAMP};
143 * Return the parsed information as a 2d array
144 * @see tim.prune.load.xml.XmlHandler#getDataArray()
146 public String[][] getDataArray()
148 int numPoints = _pointList.size();
149 // construct data array
150 String[][] result = new String[numPoints][];
151 for (int i=0; i<numPoints; i++)
153 result[i] = (String[]) _pointList.get(i);