1 package tim.prune.load.xml;
4 import javax.swing.JFrame;
5 import javax.swing.JOptionPane;
6 import javax.xml.parsers.SAXParser;
7 import javax.xml.parsers.SAXParserFactory;
9 import org.xml.sax.Attributes;
10 import org.xml.sax.SAXException;
11 import org.xml.sax.helpers.DefaultHandler;
13 import tim.prune.I18nManager;
14 import tim.prune.data.Altitude;
17 * Class for handling loading of Xml files, and passing the
18 * loaded data back to the App object
20 public class XmlFileLoader extends DefaultHandler implements Runnable
22 private File _file = null;
23 private App _app = null;
24 private JFrame _parentFrame = null;
25 private XmlHandler _handler = null;
26 private String _unknownType = null;
31 * @param inApp Application object to inform of track load
32 * @param inParentFrame parent frame to reference for dialogs
34 public XmlFileLoader(App inApp, JFrame inParentFrame)
37 _parentFrame = inParentFrame;
42 * Open the selected file and show the GUI dialog to select load options
43 * @param inFile File to open
45 public void openFile(File inFile)
50 // start new thread in case xml parsing is time-consuming
51 new Thread(this).start();
56 * Run method, to parse the file
57 * @see java.lang.Runnable#run()
63 // Construct a SAXParser and use this as a default handler
64 SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
65 saxParser.parse(_file, this);
67 // Check whether handler was properly instantiated
70 // Wasn't either kml or gpx
71 JOptionPane.showMessageDialog(_parentFrame,
72 I18nManager.getText("error.load.unknownxml") + " " + _unknownType,
73 I18nManager.getText("error.load.dialogtitle"), JOptionPane.ERROR_MESSAGE);
77 // Pass information back to app
78 _app.informDataLoaded(_handler.getFieldArray(), _handler.getDataArray(),
79 Altitude.FORMAT_METRES, _file.getName());
85 JOptionPane.showMessageDialog(_parentFrame,
86 I18nManager.getText("error.load.othererror") + " " + e.getMessage(),
87 I18nManager.getText("error.load.dialogtitle"), JOptionPane.ERROR_MESSAGE);
94 * @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
96 public void startElement(String uri, String localName, String qName,
97 Attributes attributes) throws SAXException
99 // Check for "kml" or "gpx" tags
100 if (_handler == null)
102 if (qName.equals("kml")) {_handler = new KmlHandler();}
103 else if (qName.equals("gpx")) {_handler = new GpxHandler();}
104 else if (_unknownType == null && qName != null && !qName.equals(""))
106 _unknownType = qName;
111 // Handler instantiated so pass tags on to it
112 _handler.startElement(uri, localName, qName, attributes);
114 super.startElement(uri, localName, qName, attributes);
119 * Receive characters, either between or inside tags
120 * @see org.xml.sax.ContentHandler#characters(char[], int, int)
122 public void characters(char[] ch, int start, int length)
125 if (_handler != null)
127 // Handler instantiated so pass tags on to it
128 _handler.characters(ch, start, length);
130 super.characters(ch, start, length);
135 * Receive end of element
136 * @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
138 public void endElement(String uri, String localName, String qName)
141 if (_handler != null)
143 // Handler instantiated so pass tags on to it
144 _handler.endElement(uri, localName, qName);
146 super.endElement(uri, localName, qName);