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 _insideWaypoint = false;
17 private boolean _insideName = false;
18 private boolean _insideElevation = false;
19 private boolean _insideTime = false;
20 private boolean _insideType = false;
21 private boolean _startSegment = true;
22 private String _name = null, _latitude = null, _longitude = null;
23 private String _elevation = null;
24 private String _time = null;
25 private String _type = null;
26 private ArrayList<String[]> _pointList = new ArrayList<String[]>();
29 * Receive the start of a tag
30 * @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
32 public void startElement(String uri, String localName, String qName,
33 Attributes attributes) throws SAXException
35 // Read the parameters for waypoints and track points
36 if (qName.equalsIgnoreCase("wpt") || qName.equalsIgnoreCase("trkpt") || qName.equalsIgnoreCase("rtept"))
38 _insideWaypoint = qName.equalsIgnoreCase("wpt");
39 int numAttributes = attributes.getLength();
40 for (int i=0; i<numAttributes; i++)
42 String att = attributes.getQName(i);
43 if (att.equals("lat")) {_latitude = attributes.getValue(i);}
44 else if (att.equals("lon")) {_longitude = attributes.getValue(i);}
51 else if (qName.equalsIgnoreCase("ele"))
53 _insideElevation = true;
55 else if (qName.equalsIgnoreCase("name"))
59 else if (qName.equalsIgnoreCase("time"))
63 else if (qName.equalsIgnoreCase("type"))
67 else if (qName.equalsIgnoreCase("trkseg"))
71 super.startElement(uri, localName, qName, attributes);
77 * @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
79 public void endElement(String uri, String localName, String qName)
82 if (qName.equalsIgnoreCase("wpt") || qName.equalsIgnoreCase("trkpt") || qName.equalsIgnoreCase("rtept"))
86 else if (qName.equalsIgnoreCase("ele"))
88 _insideElevation = false;
90 else if (qName.equalsIgnoreCase("name"))
94 else if (qName.equalsIgnoreCase("time"))
98 else if (qName.equalsIgnoreCase("type"))
102 super.endElement(uri, localName, qName);
107 * Process character text (inside tags or between them)
108 * @see org.xml.sax.ContentHandler#characters(char[], int, int)
110 public void characters(char[] ch, int start, int length)
113 String value = new String(ch, start, length);
114 if (_insideName && _insideWaypoint) {_name = checkCharacters(_name, value);}
115 else if (_insideElevation) {_elevation = checkCharacters(_elevation, value);}
116 else if (_insideTime) {_time = checkCharacters(_time, value);}
117 else if (_insideType) {_type = checkCharacters(_type, value);}
118 super.characters(ch, start, length);
123 * Check to concatenate partially-received values, if necessary
124 * @param inVariable variable containing characters received until now
125 * @param inValue new value received
126 * @return concatenation
128 private static String checkCharacters(String inVariable, String inValue)
130 if (inVariable == null) {return inValue;}
131 return inVariable + inValue;
136 * Process a point, either a waypoint or track point
138 private void processPoint()
140 // Put the values into a String array matching the order in getFieldArray()
141 String[] values = new String[7];
142 values[0] = _latitude; values[1] = _longitude;
143 values[2] = _elevation; values[3] = _name;
145 if (_startSegment && !_insideWaypoint) {
147 _startSegment = false;
150 _pointList.add(values);
155 * @see tim.prune.load.xml.XmlHandler#getFieldArray()
157 public Field[] getFieldArray()
159 final Field[] fields = {Field.LATITUDE, Field.LONGITUDE, Field.ALTITUDE,
160 Field.WAYPT_NAME, Field.TIMESTAMP, Field.NEW_SEGMENT, Field.WAYPT_TYPE};
166 * Return the parsed information as a 2d array
167 * @see tim.prune.load.xml.XmlHandler#getDataArray()
169 public String[][] getDataArray()
171 int numPoints = _pointList.size();
172 // construct data array
173 String[][] result = new String[numPoints][];
174 for (int i=0; i<numPoints; i++)
176 result[i] = _pointList.get(i);