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package dk.thoerup.traininfo.provider;
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import java.io.StringReader;
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import java.util.ArrayList;
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import java.util.List;
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import javax.xml.parsers.SAXParser;
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import javax.xml.parsers.SAXParserFactory;
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import org.xml.sax.Attributes;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.DefaultHandler;
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import android.util.Log;
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import dk.thoerup.traininfo.DepartureBean;
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import dk.thoerup.traininfo.util.DownloadUtil;
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public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider {
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ArrayList<DepartureBean> departures = new ArrayList<DepartureBean>();
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DepartureBean tempDeparture;
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StringBuilder builder = new StringBuilder(512);
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@Override
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public void lookupDepartures(String station) {
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departures.clear();
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try
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{ String url = "http://t-hoerup.dk/tog/xml_display.php?stationname="+station;
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String doc = DownloadUtil.getContentString(url, 45000, "ISO-8859-1");
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InputSource source = new InputSource( new StringReader(doc));
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SAXParserFactory spf = SAXParserFactory.newInstance();
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SAXParser sp = spf.newSAXParser();
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XMLReader xr = sp.getXMLReader();
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xr.setContentHandler(this);
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xr.setErrorHandler(this);
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xr.setDTDHandler(this);
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xr.parse(source);
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} catch (Exception e) {
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Log.e("XmlDepartureProvider", "looupFunction", e);
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}
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}
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@Override
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public List<DepartureBean> getDepartures() {
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return departures;
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}
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// this can be called several times fore the same text-node if there are many chardata / lines
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@Override
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public void characters (char ch[], int start, int length)
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{
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for (int i= start; i<start+length; i++)
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builder.append(ch[i]);
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}
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@Override
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public void startElement (String uri, String name, String qName, Attributes atts)throws SAXException
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{
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if (name.equalsIgnoreCase("train"))
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tempDeparture = new DepartureBean();
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builder.setLength(0); //reset StringBuilder
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}
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@Override
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public void endElement (String uri, String name, String qName) throws SAXException
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{
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if (name.equals("train")) {
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departures.add( tempDeparture );
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} else if (name.equals("time")) {
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tempDeparture.setTime(builder.toString().trim());
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} else if (name.equals("updated")) {
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tempDeparture.setLastUpdate(builder.toString().trim());
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} else if (name.equals("trainnumber")) {
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tempDeparture.setTrainNumber(builder.toString().trim());
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} else if (name.equals("destination")) {
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tempDeparture.setDestination(builder.toString().trim());
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} else if (name.equals("origin")) {
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tempDeparture.setOrigin(builder.toString().trim());
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} else if (name.equals("location")) {
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tempDeparture.setLocation(builder.toString().trim());
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} else if (name.equals("status")) {
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tempDeparture.setStatus(builder.toString().trim());
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} else if (name.equals("note")) {
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tempDeparture.setNote(builder.toString().trim());
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}
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}
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}
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