X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fload%2Fxml%2FXmlFileLoader.java;fp=tim%2Fprune%2Fload%2Fxml%2FXmlFileLoader.java;h=a607b22a2803b1b0cc09708ab6b6ef0390443681;hb=5625a1abadb5f2ca5f017fe7dbda1d5141cb637b;hp=0000000000000000000000000000000000000000;hpb=23959e65a6a0d581e657b07186d18b7a1ac5afeb;p=GpsPrune.git

diff --git a/tim/prune/load/xml/XmlFileLoader.java b/tim/prune/load/xml/XmlFileLoader.java
new file mode 100644
index 0000000..a607b22
--- /dev/null
+++ b/tim/prune/load/xml/XmlFileLoader.java
@@ -0,0 +1,148 @@
+package tim.prune.load.xml;
+
+import java.io.File;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.data.Altitude;
+
+/**
+ * Class for handling loading of Xml files, and passing the
+ * loaded data back to the App object
+ */
+public class XmlFileLoader extends DefaultHandler implements Runnable
+{
+	private File _file = null;
+	private App _app = null;
+	private JFrame _parentFrame = null;
+	private XmlHandler _handler = null;
+	private String _unknownType = null;
+
+
+	/**
+	 * Constructor
+	 * @param inApp Application object to inform of track load
+	 * @param inParentFrame parent frame to reference for dialogs
+	 */
+	public XmlFileLoader(App inApp, JFrame inParentFrame)
+	{
+		_app = inApp;
+		_parentFrame = inParentFrame;
+	}
+
+
+	/**
+	 * Open the selected file and show the GUI dialog
+	 * to select load options
+	 */
+	public void openFile(File inFile)
+	{
+		_file = inFile;
+		_handler = null;
+		_unknownType = null;
+		// start new thread in case xml parsing is time-consuming
+		new Thread(this).start();
+	}
+
+
+	/**
+	 * Run method, to parse the file
+	 * @see java.lang.Runnable#run()
+	 */
+	public void run()
+	{
+		try
+		{
+			// Construct a SAXParser and use this as a default handler
+			SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
+			saxParser.parse(_file, this);
+
+			// Check whether handler was properly instantiated
+			if (_handler == null)
+			{
+				// Wasn't either kml or gpx
+				JOptionPane.showMessageDialog(_parentFrame,
+					I18nManager.getText("error.load.unknownxml") + " " + _unknownType,
+					I18nManager.getText("error.load.dialogtitle"), JOptionPane.ERROR_MESSAGE);
+			}
+			else
+			{
+				// Pass information back to app
+				_app.informDataLoaded(_handler.getFieldArray(), _handler.getDataArray(),
+					Altitude.FORMAT_METRES, _file.getName());
+			}
+		}
+		catch (Exception e)
+		{
+			// Show error dialog
+			JOptionPane.showMessageDialog(_parentFrame,
+				I18nManager.getText("error.load.othererror") + " " + e.getMessage(),
+				I18nManager.getText("error.load.dialogtitle"), JOptionPane.ERROR_MESSAGE);
+		}
+	}
+
+
+	/**
+	 * Receive 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
+	{
+		// Check for "kml" or "gpx" tags
+		if (_handler == null)
+		{
+			if (qName.equals("kml")) {_handler = new KmlHandler();}
+			else if (qName.equals("gpx")) {_handler = new GpxHandler();}
+			else if (_unknownType == null && qName != null && !qName.equals(""))
+			{
+				_unknownType = qName;
+			}
+		}
+		else
+		{
+			// Handler instantiated so pass tags on to it
+			_handler.startElement(uri, localName, qName, attributes);
+		}
+		super.startElement(uri, localName, qName, attributes);
+	}
+
+
+	/**
+	 * Receive characters, either between or inside tags
+	 * @see org.xml.sax.ContentHandler#characters(char[], int, int)
+	 */
+	public void characters(char[] ch, int start, int length)
+			throws SAXException
+	{
+		if (_handler != null)
+		{
+			// Handler instantiated so pass tags on to it
+			_handler.characters(ch, start, length);
+		}
+		super.characters(ch, start, length);
+	}
+
+
+	/**
+	 * Receive end of element
+	 * @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
+	{
+		if (_handler != null)
+		{
+			// Handler instantiated so pass tags on to it
+			_handler.endElement(uri, localName, qName);
+		}
+		super.endElement(uri, localName, qName);
+	}
+}