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package dk.thoerup.traininfo.provider; |
package dk.thoerup.traininfo.provider; |
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import java.io.ByteArrayInputStream; |
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import java.io.IOException; |
import java.net.URLEncoder; |
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import java.util.ArrayList; |
import java.util.ArrayList; |
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import java.util.List; |
import java.util.List; |
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import javax.xml.parsers.DocumentBuilder; |
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import javax.xml.parsers.DocumentBuilderFactory; |
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import javax.xml.parsers.ParserConfigurationException; |
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import org.w3c.dom.Document; |
import org.w3c.dom.Document; |
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import org.w3c.dom.Node; |
import org.w3c.dom.Node; |
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import org.w3c.dom.NodeList; |
import org.w3c.dom.NodeList; |
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import org.xml.sax.SAXException; |
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import android.location.Location; |
import android.location.Location; |
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import android.util.Log; |
import android.util.Log; |
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import dk.thoerup.traininfo.StationBean; |
import dk.thoerup.traininfo.StationBean; |
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import dk.thoerup.traininfo.util.AndroidTimeoutCache; |
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import dk.thoerup.traininfo.util.DownloadUtil; |
import dk.thoerup.traininfo.util.DownloadUtil; |
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import dk.thoerup.traininfo.util.XmlUtil; |
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public class XmlStationProvider implements StationProvider { |
public class XmlStationProvider implements StationProvider { |
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final static int CACHE_TIMEOUT = 300*1000; |
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List<StationBean> stations = new ArrayList<StationBean>(); |
List<StationBean> stations = new ArrayList<StationBean>(); |
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AndroidTimeoutCache<String, List<StationBean>> stationCache = new AndroidTimeoutCache<String, List<StationBean>>(CACHE_TIMEOUT); |
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@Override |
@Override |
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public List<StationBean> getStations() { |
public List<StationBean> getStations() { |
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return stations; |
return stations; |
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} |
} |
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@Override |
@Override |
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public boolean lookupStations(Location location) { |
public boolean lookupStations(Location location) { |
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boolean success = false; |
String url = XmlUtil.SERVICE_BASE + "/LocateStations?latitude=" + (float)location.getLatitude() + "&longitude=" + (float)location.getLongitude(); |
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String url = "http://app.t-hoerup.dk/TrainInfoService/LocateStations?latitude=" + location.getLatitude() + "&longitude=" + location.getLongitude(); |
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Log.i("url", url); |
Log.i("url", url); |
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return lookupStationsWorker(url); |
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} |
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@Override |
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public boolean lookupStationsByName(String name) { |
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// String url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + Uri.encode(name); |
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String url = ""; |
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try { |
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url = XmlUtil.SERVICE_BASE + "/LocateStations?name=" + URLEncoder.encode(name, "ISO8859-1"); |
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} catch (Exception e) { |
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Log.e("lookupStations", "Encoding failed", e); |
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} |
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Log.i("url", url); |
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return lookupStationsWorker(url); |
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} |
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@Override |
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public boolean lookupStationsByIds(String ids) { |
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String url = ""; |
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url = XmlUtil.SERVICE_BASE + "/LocateStations?list=" + ids; |
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Log.i("url", url); |
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return lookupStationsWorker(url); |
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} |
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public boolean lookupStationsWorker(String url) { |
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boolean result; |
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List<StationBean> tmpStations = stationCache.get(url); |
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if (tmpStations != null) { |
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Log.i("lookupStations", "cache hit " + url); |
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stations = tmpStations; |
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result = true; |
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} else { |
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result = fetchStations(url); |
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if (result == true) { |
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stationCache.put(url, stations); |
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} |
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} |
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return result; |
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} |
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public boolean fetchStations(String url) { |
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boolean success = false; |
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try { |
try { |
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stations.clear(); |
stations.clear(); |
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String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1"); |
String xml = DownloadUtil.getContentString(url, 15000, "ISO-8859-1"); |
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Document doc = parseXML(xml); |
Document doc = XmlUtil.parseXML(xml); |
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Node rootNode = doc.getDocumentElement(); // stations |
Node rootNode = doc.getDocumentElement(); // stations |
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NodeList stationList = rootNode.getChildNodes(); |
NodeList stationList = rootNode.getChildNodes(); |
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if (nodeName.equals("longitude")) |
if (nodeName.equals("longitude")) |
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station.setLongitude( Double.parseDouble(content) ); |
station.setLongitude( Double.parseDouble(content) ); |
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if (nodeName.equals("stationcode")) |
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station.setCode(content); |
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if (nodeName.equals("calcdist")) |
if (nodeName.equals("calcdist")) |
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station.setDistance( (int) Double.parseDouble(content) ); |
station.setDistance( (int) Double.parseDouble(content) ); |
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if (nodeName.equals("address")) |
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station.setAddress( content ); |
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if (nodeName.equals("regional")) |
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station.setRegional( Boolean.parseBoolean(content) ); |
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if (nodeName.equals("strain")) |
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station.setSTrain( Boolean.parseBoolean(content) ); |
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if (nodeName.equals("metro")) |
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station.setMetro( Boolean.parseBoolean(content) ); |
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} |
} |
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stations.add(station); |
stations.add(station); |
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} |
} |
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return success; |
return success; |
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} |
} |
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private Document parseXML(String str) throws SAXException, IOException, ParserConfigurationException |
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{ |
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DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder(); |
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return builder.parse( new ByteArrayInputStream(str.getBytes()) ); |
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} |
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} |
} |