traininfo/provider/XmlDepartureProvider.java

package dk.thoerup.traininfo.provider;

import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

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 android.util.Log;
import dk.thoerup.traininfo.DepartureBean;
import dk.thoerup.traininfo.util.DownloadUtil;

public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider {

        ArrayList<DepartureBean> departures = new ArrayList<DepartureBean>();
        
        
        DepartureBean tempDeparture;
        StringBuilder builder = new StringBuilder(512);
        
        @Override
        public void lookupDepartures(String station) {
                departures.clear();
                try
                {       String url = "http://t-hoerup.dk/tog/xml_display.php?stationname="+station;
                        String doc =  DownloadUtil.getContentString(url, 45000, "ISO-8859-1");
                        
                        InputSource source = new InputSource( new StringReader(doc));
                        
                        SAXParserFactory spf = SAXParserFactory.newInstance();
            SAXParser sp = spf.newSAXParser();
            XMLReader xr = sp.getXMLReader();

                        xr.setContentHandler(this);
                        xr.setErrorHandler(this);
                        xr.setDTDHandler(this);
                        xr.parse(source);
                } catch (Exception e) {
                        Log.e("XmlDepartureProvider", "looupFunction", e);
                }
        }
        
        @Override
        public List<DepartureBean> getDepartures() {
                return departures;
        }
        
        // this can be called several times fore the same text-node if there are many chardata / lines
        @Override
        public void characters (char ch[], int start, int length) 
        {               
                for (int i= start; i<start+length; i++)
                        builder.append(ch[i]);  
        }
        
        @Override
        public void startElement (String uri, String name, String qName, Attributes atts)throws SAXException
        {
                if (name.equalsIgnoreCase("train"))
                        tempDeparture = new DepartureBean();
                
                builder.setLength(0); //reset StringBuilder
        }
        
        @Override
        public void endElement (String uri, String name, String qName) throws SAXException
        {
                if (name.equals("train")) {
                        departures.add( tempDeparture );
                } else if (name.equals("time")) {
                        tempDeparture.setTime(builder.toString().trim());
                } else if (name.equals("updated")) {
                        tempDeparture.setLastUpdate(builder.toString().trim());
                } else if (name.equals("trainnumber")) {
                        tempDeparture.setTrainNumber(builder.toString().trim());
                } else if (name.equals("destination")) {
                        tempDeparture.setDestination(builder.toString().trim());
                } else if (name.equals("origin")) {
                        tempDeparture.setOrigin(builder.toString().trim());
                } else if (name.equals("location")) {
                        tempDeparture.setLocation(builder.toString().trim());
                } else if (name.equals("status")) {
                        tempDeparture.setStatus(builder.toString().trim());
                } else if (name.equals("note")) {
                        tempDeparture.setNote(builder.toString().trim());
                } 
        }
}
1	torben	237	package dk.thoerup.traininfo.provider;
2
3			import java.io.StringReader;
4			import java.util.ArrayList;
5			import java.util.List;
6
7			import javax.xml.parsers.SAXParser;
8			import javax.xml.parsers.SAXParserFactory;
9
10			import org.xml.sax.Attributes;
11			import org.xml.sax.InputSource;
12			import org.xml.sax.SAXException;
13			import org.xml.sax.XMLReader;
14			import org.xml.sax.helpers.DefaultHandler;
15
16			import android.util.Log;
17			import dk.thoerup.traininfo.DepartureBean;
18	torben	238	import dk.thoerup.traininfo.util.DownloadUtil;
19	torben	237
20			public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider {
21
22			ArrayList<DepartureBean> departures = new ArrayList<DepartureBean>();
23
24
25			DepartureBean tempDeparture;
26			StringBuilder builder = new StringBuilder(512);
27
28			@Override
29			public void lookupDepartures(String station) {
30			departures.clear();
31			try
32	torben	238	{ String url = "http://t-hoerup.dk/tog/xml_display.php?stationname="+station;
33	torben	283	String doc = DownloadUtil.getContentString(url, 45000, "ISO-8859-1");
34	torben	237
35			InputSource source = new InputSource( new StringReader(doc));
36
37			SAXParserFactory spf = SAXParserFactory.newInstance();
38			SAXParser sp = spf.newSAXParser();
39			XMLReader xr = sp.getXMLReader();
40
41			xr.setContentHandler(this);
42			xr.setErrorHandler(this);
43			xr.setDTDHandler(this);
44			xr.parse(source);
45			} catch (Exception e) {
46			Log.e("XmlDepartureProvider", "looupFunction", e);
47			}
48			}
49
50			@Override
51			public List<DepartureBean> getDepartures() {
52			return departures;
53			}
54
55			// this can be called several times fore the same text-node if there are many chardata / lines
56			@Override
57			public void characters (char ch[], int start, int length)
58			{
59			for (int i= start; i<start+length; i++)
60			builder.append(ch[i]);
61			}
62
63			@Override
64			public void startElement (String uri, String name, String qName, Attributes atts)throws SAXException
65			{
66			if (name.equalsIgnoreCase("train"))
67			tempDeparture = new DepartureBean();
68
69			builder.setLength(0); //reset StringBuilder
70			}
71
72			@Override
73			public void endElement (String uri, String name, String qName) throws SAXException
74			{
75			if (name.equals("train")) {
76			departures.add( tempDeparture );
77			} else if (name.equals("time")) {
78	torben	244	tempDeparture.setTime(builder.toString().trim());
79	torben	237	} else if (name.equals("updated")) {
80	torben	244	tempDeparture.setLastUpdate(builder.toString().trim());
81	torben	237	} else if (name.equals("trainnumber")) {
82	torben	244	tempDeparture.setTrainNumber(builder.toString().trim());
83	torben	237	} else if (name.equals("destination")) {
84	torben	244	tempDeparture.setDestination(builder.toString().trim());
85	torben	237	} else if (name.equals("origin")) {
86	torben	244	tempDeparture.setOrigin(builder.toString().trim());
87	torben	237	} else if (name.equals("location")) {
88	torben	244	tempDeparture.setLocation(builder.toString().trim());
89	torben	237	} else if (name.equals("status")) {
90	torben	244	tempDeparture.setStatus(builder.toString().trim());
91	torben	237	} else if (name.equals("note")) {
92	torben	244	tempDeparture.setNote(builder.toString().trim());
93	torben	237	}
94			}
95			}