X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fload%2Fxml%2FKmlHandler.java;fp=tim%2Fprune%2Fload%2Fxml%2FKmlHandler.java;h=09706390c03b59506781f11da5570f3f8d051bd9;hb=5625a1abadb5f2ca5f017fe7dbda1d5141cb637b;hp=0000000000000000000000000000000000000000;hpb=23959e65a6a0d581e657b07186d18b7a1ac5afeb;p=GpsPrune.git

diff --git a/tim/prune/load/xml/KmlHandler.java b/tim/prune/load/xml/KmlHandler.java
new file mode 100644
index 0000000..0970639
--- /dev/null
+++ b/tim/prune/load/xml/KmlHandler.java
@@ -0,0 +1,150 @@
+package tim.prune.load.xml;
+
+import java.util.ArrayList;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+
+import tim.prune.data.Field;
+
+
+/**
+ * Class for handling specifics of parsing Kml files
+ */
+public class KmlHandler extends XmlHandler
+{
+	private boolean _insidePlacemark = false;
+	private boolean _insideName = false;
+	private boolean _insideCoordinates = false;
+	private String _name = null;
+	private StringBuffer _coordinates = null;
+	private ArrayList _pointList = new ArrayList();
+
+
+	/**
+	 * 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
+	{
+		String tagName = localName;
+		if (tagName == null || tagName.equals("")) {tagName = qName;}
+		if (tagName.equalsIgnoreCase("Placemark")) _insidePlacemark = true;
+		else if (tagName.equalsIgnoreCase("coordinates")) {_insideCoordinates = true; _coordinates = null;}
+		else if (tagName.equalsIgnoreCase("name")) {_insideName = true; _name = 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 tagName = localName;
+		if (tagName == null || tagName.equals("")) {tagName = qName;}
+		if (tagName.equalsIgnoreCase("Placemark"))
+		{
+			processPlacemark();
+			_insidePlacemark = false;
+		}
+		else if (tagName.equalsIgnoreCase("coordinates")) _insideCoordinates = false;
+		else if (tagName.equalsIgnoreCase("name")) _insideName = false;
+		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
+	{
+		if (_insidePlacemark && (_insideName || _insideCoordinates))
+		{
+			String value = new String(ch, start, length);
+			if (_insideName) {_name = value;}
+			else if (_insideCoordinates)
+			{
+				if (_coordinates == null)
+				{
+					_coordinates = new StringBuffer();
+				}
+				_coordinates.append(value);
+			}
+		}
+		super.characters(ch, start, length);
+	}
+
+
+	/**
+	 * Process a placemark entry, either a single waypoint or a whole track
+	 */
+	private void processPlacemark()
+	{
+		if (_coordinates == null) return;
+		String allCoords = _coordinates.toString();
+		String[] coordArray = allCoords.split("[ \n]");
+		int numPoints = coordArray.length;
+		if (numPoints == 1)
+		{
+			// Add single waypoint to list
+			_pointList.add(makeStringArray(allCoords, _name));
+		}
+		else if (numPoints > 1)
+		{
+			// Add each of the unnamed track points to list
+			for (int p=0; p<numPoints; p++)
+			{
+				_pointList.add(makeStringArray(coordArray[p], null));
+			}
+		}
+	}
+
+
+	/**
+	 * Construct the String array for the given coordinates and name
+	 * @param inCoordinates coordinate string in Kml format
+	 * @param inName name of waypoint, or null if track point
+	 * @return String array for point
+	 */
+	private static String[] makeStringArray(String inCoordinates, String inName)
+	{
+		String[] result = new String[4];
+		String[] values = inCoordinates.split(",");
+		if (values.length == 3) {System.arraycopy(values, 0, result, 0, 3);}
+		result[3] = inName;
+		return result;
+	}
+
+
+	/**
+	 * @see tim.prune.load.xml.XmlHandler#getFieldArray()
+	 */
+	public Field[] getFieldArray()
+	{
+		final Field[] fields = {Field.LONGITUDE, Field.LATITUDE, Field.ALTITUDE, Field.WAYPT_NAME};
+		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] = (String[]) _pointList.get(i);
+		}
+		return result;
+	}
+
+}