traininfo/provider/XmlDepartureProvider.java

package dk.thoerup.traininfo.provider;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.net.URL;
import java.net.URLConnection;
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;

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 doc = getUrlContents("http://t-hoerup.dk/tog/xml_display.php?stationname="+station);
                        
                        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;
        }

        private String getUrlContents(String uri) throws IOException
        {
                URL url = new URL(uri);         
                URLConnection conn = url.openConnection();
                conn.setConnectTimeout(5000);
                InputStream stream = conn.getInputStream();

                BufferedReader in = new BufferedReader(new InputStreamReader(stream, "ISO-8859-1"),8192);

                StringBuilder sbuilder = new StringBuilder();

                String line;
                while ( (line = in.readLine()) != null) {
                        sbuilder.append(line);
                        sbuilder.append("\r\n");
                }

                return sbuilder.toString();
        }
        
        // 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());
                } else if (name.equals("updated")) {
                        tempDeparture.setLastUpdate(builder.toString());
                } else if (name.equals("trainnumber")) {
                        tempDeparture.setTrainNumber(builder.toString());
                } else if (name.equals("destination")) {
                        tempDeparture.setDestination(builder.toString());
                } else if (name.equals("origin")) {
                        tempDeparture.setOrigin(builder.toString());
                } else if (name.equals("location")) {
                        tempDeparture.setLocation(builder.toString());
                } else if (name.equals("status")) {
                        tempDeparture.setStatus(builder.toString());
                } else if (name.equals("note")) {
                        tempDeparture.setNote(builder.toString());
                } 
        }
}
1	torben	237	package dk.thoerup.traininfo.provider;
2
3			import java.io.BufferedReader;
4			import java.io.IOException;
5			import java.io.InputStream;
6			import java.io.InputStreamReader;
7			import java.io.StringReader;
8			import java.net.URL;
9			import java.net.URLConnection;
10			import java.util.ArrayList;
11			import java.util.List;
12
13			import javax.xml.parsers.SAXParser;
14			import javax.xml.parsers.SAXParserFactory;
15
16			import org.xml.sax.Attributes;
17			import org.xml.sax.InputSource;
18			import org.xml.sax.SAXException;
19			import org.xml.sax.XMLReader;
20			import org.xml.sax.helpers.DefaultHandler;
21
22			import android.util.Log;
23			import dk.thoerup.traininfo.DepartureBean;
24
25			public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider {
26
27			ArrayList<DepartureBean> departures = new ArrayList<DepartureBean>();
28
29
30			DepartureBean tempDeparture;
31			StringBuilder builder = new StringBuilder(512);
32
33			@Override
34			public void lookupDepartures(String station) {
35			departures.clear();
36			try
37			{
38			String doc = getUrlContents("http://t-hoerup.dk/tog/xml_display.php?stationname="+station);
39
40			InputSource source = new InputSource( new StringReader(doc));
41
42			SAXParserFactory spf = SAXParserFactory.newInstance();
43			SAXParser sp = spf.newSAXParser();
44			XMLReader xr = sp.getXMLReader();
45
46			xr.setContentHandler(this);
47			xr.setErrorHandler(this);
48			xr.setDTDHandler(this);
49			xr.parse(source);
50			} catch (Exception e) {
51			Log.e("XmlDepartureProvider", "looupFunction", e);
52			}
53			}
54
55			@Override
56			public List<DepartureBean> getDepartures() {
57			return departures;
58			}
59
60			private String getUrlContents(String uri) throws IOException
61			{
62			URL url = new URL(uri);
63			URLConnection conn = url.openConnection();
64			conn.setConnectTimeout(5000);
65			InputStream stream = conn.getInputStream();
66
67			BufferedReader in = new BufferedReader(new InputStreamReader(stream, "ISO-8859-1"),8192);
68
69			StringBuilder sbuilder = new StringBuilder();
70
71			String line;
72			while ( (line = in.readLine()) != null) {
73			sbuilder.append(line);
74			sbuilder.append("\r\n");
75			}
76
77			return sbuilder.toString();
78			}
79
80			// this can be called several times fore the same text-node if there are many chardata / lines
81			@Override
82			public void characters (char ch[], int start, int length)
83			{
84			for (int i= start; i<start+length; i++)
85			builder.append(ch[i]);
86			}
87
88			@Override
89			public void startElement (String uri, String name, String qName, Attributes atts)throws SAXException
90			{
91			if (name.equalsIgnoreCase("train"))
92			tempDeparture = new DepartureBean();
93
94			builder.setLength(0); //reset StringBuilder
95			}
96
97			@Override
98			public void endElement (String uri, String name, String qName) throws SAXException
99			{
100			if (name.equals("train")) {
101			departures.add( tempDeparture );
102			} else if (name.equals("time")) {
103			tempDeparture.setTime(builder.toString());
104			} else if (name.equals("updated")) {
105			tempDeparture.setLastUpdate(builder.toString());
106			} else if (name.equals("trainnumber")) {
107			tempDeparture.setTrainNumber(builder.toString());
108			} else if (name.equals("destination")) {
109			tempDeparture.setDestination(builder.toString());
110			} else if (name.equals("origin")) {
111			tempDeparture.setOrigin(builder.toString());
112			} else if (name.equals("location")) {
113			tempDeparture.setLocation(builder.toString());
114			} else if (name.equals("status")) {
115			tempDeparture.setStatus(builder.toString());
116			} else if (name.equals("note")) {
117			tempDeparture.setNote(builder.toString());
118			}
119			}
120			}