/*
Copyright (C) 2001, 2006 United States Government
as represented by the Administrator of the
National Aeronautics and Space Administration.
All Rights Reserved.
*/
package gov.nasa.worldwind.formats.gpx;
import gov.nasa.worldwind.tracks.*;
import gov.nasa.worldwind.util.Logging;
/**
* @author tag
* @version $Id: GpxReader.java 5261 2008-05-01 20:37:35Z dcollins $
*/
public class GpxReader // TODO: I18N, proper exception handling, remove stack-trace prints
{
private javax.xml.parsers.SAXParser parser;
private java.util.List<Track> tracks = new java.util.ArrayList<Track>();
public GpxReader() throws javax.xml.parsers.ParserConfigurationException, org.xml.sax.SAXException
{
javax.xml.parsers.SAXParserFactory factory = javax.xml.parsers.SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
this.parser = factory.newSAXParser();
}
/**
* @param path
* @throws IllegalArgumentException if <code>path</code> is null
* @throws java.io.IOException if no file exists at the location specified by <code>path</code>
* @throws org.xml.sax.SAXException
*/
public void readFile(String path) throws java.io.IOException, org.xml.sax.SAXException
{
if (path == null)
{
String msg = Logging.getMessage("nullValue.PathIsNull");
Logging.logger().severe(msg);
throw new IllegalArgumentException(msg);
}
java.io.File file = new java.io.File(path);
if (!file.exists())
{
String msg = Logging.getMessage("generic.FileNotFound", path);
Logging.logger().severe(msg);
throw new java.io.FileNotFoundException(path);
}
java.io.FileInputStream fis = new java.io.FileInputStream(file);
this.doRead(fis);
}
/**
* @param stream
* @throws IllegalArgumentException if <code>stream</code> is null
* @throws java.io.IOException
* @throws org.xml.sax.SAXException
*/
public void readStream(java.io.InputStream stream) throws java.io.IOException, org.xml.sax.SAXException
{
if (stream == null)
{
String msg = Logging.getMessage("nullValue.InputStreamIsNull");
Logging.logger().severe(msg);
throw new IllegalArgumentException(msg);
}
this.doRead(stream);
}
public java.util.List<Track> getTracks()
{
return this.tracks;
}
private void doRead(java.io.InputStream fis) throws java.io.IOException, org.xml.sax.SAXException
{
this.parser.parse(fis, new Handler());
}
private class Handler extends org.xml.sax.helpers.DefaultHandler
{
// this is a private class used solely by the containing class, so no validation occurs in it.
private gov.nasa.worldwind.formats.gpx.ElementParser currentElement = null;
@Override
public void warning(org.xml.sax.SAXParseException saxParseException) throws org.xml.sax.SAXException
{
saxParseException.printStackTrace();
super.warning(saxParseException);
}
@Override
public void error(org.xml.sax.SAXParseException saxParseException) throws org.xml.sax.SAXException
{
saxParseException.printStackTrace();
super.error(saxParseException);
}
@Override
public void fatalError(org.xml.sax.SAXParseException saxParseException) throws org.xml.sax.SAXException
{
saxParseException.printStackTrace();
super.fatalError(saxParseException);
}
private boolean firstElement = true;
@Override
public void startElement(String uri, String lname, String qname, org.xml.sax.Attributes attributes)
throws org.xml.sax.SAXException
{
if (this.firstElement)
{
if (!lname.equalsIgnoreCase("gpx"))
throw new IllegalArgumentException("Not a GPX file");
else
this.firstElement = false;
}
if (this.currentElement != null)
{
this.currentElement.startElement(uri, lname, qname, attributes);
}
else if (lname.equalsIgnoreCase("trk"))
{
GpxTrack track = new GpxTrack(uri, lname, qname, attributes);
this.currentElement = track;
GpxReader.this.tracks.add(track);
}
}
@Override
public void endElement(String uri, String lname, String qname) throws org.xml.sax.SAXException
{
if (this.currentElement != null)
{
this.currentElement.endElement(uri, lname, qname);
if (lname.equalsIgnoreCase(this.currentElement.getElementName()))
this.currentElement = null;
}
}
@Override
public void characters(char[] data, int start, int length) throws org.xml.sax.SAXException
{
if (this.currentElement != null)
this.currentElement.characters(data, start, length);
}
}
}