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	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	}