--- /dev/null
+package tim.prune.load.xml;
+
+import java.util.ArrayList;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+
+import tim.prune.data.Field;
+import tim.prune.load.TrackNameList;
+
+
+/**
+ * Class for handling specifics of parsing Gpx files
+ */
+public class GpxHandler extends XmlHandler
+{
+ private boolean _insidePoint = false;
+ private boolean _insideWaypoint = false;
+ private boolean _startSegment = true;
+ private boolean _isTrackPoint = false;
+ private int _trackNum = -1;
+ private GpxTag _fileTitle = new GpxTag();
+ private GpxTag _pointName = new GpxTag(), _trackName = new GpxTag();
+ private String _latitude = null, _longitude = null;
+ private GpxTag _elevation = new GpxTag(), _time = new GpxTag();
+ private GpxTag _type = new GpxTag(), _description = new GpxTag();
+ private GpxTag _link = new GpxTag();
+ private GpxTag _currentTag = null;
+ private ArrayList<String[]> _pointList = new ArrayList<String[]>();
+ private ArrayList<String> _linkList = new ArrayList<String>();
+ private TrackNameList _trackNameList = new TrackNameList();
+
+
+ /**
+ * Receive the start of a tag
+ * @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
+ */
+ public void startElement(String uri, String localName, String qName,
+ Attributes attributes) throws SAXException
+ {
+ // Read the parameters for waypoints and track points
+ String tag = qName.toLowerCase();
+ if (tag.equals("wpt") || tag.equals("trkpt") || tag.equals("rtept"))
+ {
+ _insidePoint = true;
+ _insideWaypoint = tag.equals("wpt");
+ _isTrackPoint = tag.equals("trkpt");
+ final int numAttributes = attributes.getLength();
+ for (int i=0; i<numAttributes; i++)
+ {
+ String att = attributes.getQName(i).toLowerCase();
+ if (att.equals("lat")) {_latitude = attributes.getValue(i);}
+ else if (att.equals("lon")) {_longitude = attributes.getValue(i);}
+ }
+ _elevation.setValue(null);
+ _pointName.setValue(null);
+ _time.setValue(null);
+ _type.setValue(null);
+ _link.setValue(null);
+ _description.setValue(null);
+ }
+ else if (tag.equals("ele")) {
+ _currentTag = _elevation;
+ }
+ else if (tag.equals("name"))
+ {
+ if (_insidePoint) {
+ _currentTag = _pointName;
+ }
+ else if (_trackNum < 0)
+ {
+ _currentTag = _fileTitle;
+ }
+ else {
+ _currentTag = _trackName;
+ }
+ }
+ else if (tag.equals("time")) {
+ _currentTag = _time;
+ }
+ else if (tag.equals("type")) {
+ _currentTag = _type;
+ }
+ else if (tag.equals("description") || tag.equals("desc")) {
+ _currentTag = _description;
+ }
+ else if (tag.equals("link")) {
+ _link.setValue(attributes.getValue("href"));
+ }
+ else if (tag.equals("trkseg")) {
+ _startSegment = true;
+ }
+ else if (tag.equals("trk"))
+ {
+ _trackNum++;
+ _trackName.setValue(null);
+ }
+ super.startElement(uri, localName, qName, attributes);
+ }
+
+
+ /**
+ * Process end tag
+ * @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
+ */
+ public void endElement(String uri, String localName, String qName)
+ throws SAXException
+ {
+ String tag = qName.toLowerCase();
+ if (tag.equals("wpt") || tag.equals("trkpt") || tag.equals("rtept"))
+ {
+ processPoint();
+ _insidePoint = false;
+ }
+ else {
+ _currentTag = null;
+ }
+ super.endElement(uri, localName, qName);
+ }
+
+
+ /**
+ * Process character text (inside tags or between them)
+ * @see org.xml.sax.ContentHandler#characters(char[], int, int)
+ */
+ public void characters(char[] ch, int start, int length)
+ throws SAXException
+ {
+ String value = new String(ch, start, length);
+ if (_currentTag != null) {
+ _currentTag.setValue(checkCharacters(_currentTag.getValue(), value));
+ }
+ super.characters(ch, start, length);
+ }
+
+
+ /**
+ * Check to concatenate partially-received values, if necessary
+ * @param inVariable variable containing characters received until now
+ * @param inValue new value received
+ * @return concatenation
+ */
+ private static String checkCharacters(String inVariable, String inValue)
+ {
+ if (inVariable == null) {return inValue;}
+ return inVariable + inValue;
+ }
+
+
+ /**
+ * Process a point, either a waypoint or track point
+ */
+ private void processPoint()
+ {
+ // Put the values into a String array matching the order in getFieldArray()
+ String[] values = new String[8];
+ values[0] = _latitude;
+ values[1] = _longitude;
+ values[2] = _elevation.getValue();
+ if (_insideWaypoint) {values[3] = _pointName.getValue();}
+ values[4] = _time.getValue();
+ if (_startSegment && !_insideWaypoint)
+ {
+ values[5] = "1";
+ _startSegment = false;
+ }
+ values[6] = _type.getValue();
+ values[7] = _description.getValue();
+ _pointList.add(values);
+ _trackNameList.addPoint(_trackNum, _trackName.getValue(), _isTrackPoint);
+ _linkList.add(_link.getValue());
+ }
+
+
+ /**
+ * @see tim.prune.load.xml.XmlHandler#getFieldArray()
+ */
+ public Field[] getFieldArray()
+ {
+ final Field[] fields = {Field.LATITUDE, Field.LONGITUDE, Field.ALTITUDE,
+ Field.WAYPT_NAME, Field.TIMESTAMP, Field.NEW_SEGMENT,
+ Field.WAYPT_TYPE, Field.DESCRIPTION};
+ return fields;
+ }
+
+
+ /**
+ * Return the parsed information as a 2d array
+ * @see tim.prune.load.xml.XmlHandler#getDataArray()
+ */
+ public String[][] getDataArray()
+ {
+ int numPoints = _pointList.size();
+ // construct data array
+ String[][] result = new String[numPoints][];
+ for (int i=0; i<numPoints; i++)
+ {
+ result[i] = _pointList.get(i);
+ }
+ return result;
+ }
+
+ /**
+ * @return array of links, or null if none
+ */
+ public String[] getLinkArray()
+ {
+ int numPoints = _linkList.size();
+ boolean hasLink = false;
+ String[] result = new String[numPoints];
+ for (int i=0; i<numPoints; i++)
+ {
+ result[i] = _linkList.get(i);
+ if (result[i] != null) {hasLink = true;}
+ }
+ if (!hasLink) {result = null;}
+ return result;
+ }
+
+ /**
+ * @return track name list
+ */
+ public TrackNameList getTrackNameList() {
+ return _trackNameList;
+ }
+
+ /**
+ * @return file title
+ */
+ public String getFileTitle() {
+ return _fileTitle.getValue();
+ }
+}
projects / GpsPrune.git / blobdiff