--- /dev/null
+package tim.prune.load.xml;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.DefaultHandler;
+import org.xml.sax.helpers.XMLReaderFactory;
+
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.data.SourceInfo;
+import tim.prune.load.MediaLinkInfo;
+
+/**
+ * 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 XmlHandler _handler = null;
+ private String _unknownType = null;
+
+
+ /**
+ * Constructor
+ * @param inApp Application object to inform of track load
+ */
+ public XmlFileLoader(App inApp)
+ {
+ _app = inApp;
+ }
+
+ /**
+ * Reset the handler to ensure data cleared
+ */
+ public void reset()
+ {
+ _handler = null;
+ _unknownType = null;
+ }
+
+ /**
+ * Open the selected file
+ * @param inFile File to open
+ */
+ public void openFile(File inFile)
+ {
+ _file = inFile;
+ reset();
+ // 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()
+ {
+ FileInputStream inStream = null;
+ boolean success = false;
+ try
+ {
+ inStream = new FileInputStream(_file);
+ success = parseXmlStream(inStream);
+ }
+ catch (FileNotFoundException fnfe) {}
+
+ // Clean up the stream, don't need it any more
+ try {inStream.close();} catch (IOException e2) {}
+
+ if (success)
+ {
+ // Check whether handler was properly instantiated
+ if (_handler == null)
+ {
+ // Wasn't either kml or gpx
+ _app.showErrorMessageNoLookup("error.load.dialogtitle",
+ I18nManager.getText("error.load.unknownxml") + " " + _unknownType);
+ }
+ else
+ {
+ SourceInfo.FILE_TYPE sourceType = (_handler instanceof GpxHandler ? SourceInfo.FILE_TYPE.GPX : SourceInfo.FILE_TYPE.KML);
+ SourceInfo sourceInfo = new SourceInfo(_file, sourceType);
+ sourceInfo.setFileTitle(_handler.getFileTitle());
+
+ // Pass information back to app
+ _app.informDataLoaded(_handler.getFieldArray(), _handler.getDataArray(),
+ null, sourceInfo, _handler.getTrackNameList(),
+ new MediaLinkInfo(_handler.getLinkArray()));
+ }
+ }
+ }
+
+
+ /**
+ * Try both Xerces and the built-in java classes to parse the given xml stream
+ * @param inStream input stream from file / zip / gzip
+ * @return true on success, false if both xerces and built-in parser failed
+ */
+ public boolean parseXmlStream(InputStream inStream)
+ {
+ boolean success = false;
+ // Firstly, try to use xerces to parse the xml (will throw an exception if not available)
+ try
+ {
+ XMLReader xmlReader = XMLReaderFactory.createXMLReader("org.apache.xerces.parsers.SAXParser");
+ xmlReader.setContentHandler(this);
+ xmlReader.parse(new InputSource(inStream));
+ success = true; // worked
+ }
+ catch (Exception e) {} // don't care too much if it didn't work, there's a backup
+
+ // If that didn't work, try the built-in classes (which work for xml1.0 but handling for 1.1 contains bugs)
+ if (!success)
+ {
+ try
+ {
+ // Construct a SAXParser and use this as a default handler
+ SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
+ saxParser.parse(inStream, this);
+ success = true;
+ }
+ catch (Exception e)
+ {
+ // Show error dialog
+ _app.showErrorMessageNoLookup("error.load.dialogtitle",
+ I18nManager.getText("error.load.othererror") + " " + e.getMessage());
+ }
+ }
+ return success;
+ }
+
+ /**
+ * 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.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);
+ }
+
+ /**
+ * @return The Xml handler used for the parsing
+ */
+ public XmlHandler getHandler()
+ {
+ return _handler;
+ }
+}
projects / GpsPrune.git / blobdiff