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package dk.thoerup.traininfo.provider; |
package dk.thoerup.traininfo.provider; |
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import java.io.StringReader; |
import java.io.StringReader; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.List; |
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import javax.xml.parsers.SAXParser; |
import javax.xml.parsers.SAXParser; |
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import javax.xml.parsers.SAXParserFactory; |
import javax.xml.parsers.SAXParserFactory; |
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import android.util.Log; |
import android.util.Log; |
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import dk.thoerup.traininfo.DepartureBean; |
import dk.thoerup.traininfo.DepartureBean; |
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import dk.thoerup.traininfo.DepartureEntry; |
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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; |
import dk.thoerup.traininfo.util.XmlUtil; |
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public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider { |
public class XmlDepartureProvider extends DefaultHandler implements DepartureProvider { |
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final static long CACHE_TIMEOUT = 60*1000; |
final static int CACHE_TIMEOUT = 60*1000; |
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class CacheEntry { |
AndroidTimeoutCache<String,DepartureBean> departureCache = new AndroidTimeoutCache<String,DepartureBean>(CACHE_TIMEOUT); |
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public long timestamp; |
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public List<DepartureBean> departures; |
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} |
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HashMap<Integer, CacheEntry> departureCache = new HashMap<Integer,CacheEntry>(); |
DepartureBean departures; |
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ArrayList<DepartureBean> departures; |
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DepartureBean tempDeparture; |
DepartureEntry tempDeparture; |
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StringBuilder builder = new StringBuilder(512); |
StringBuilder builder = new StringBuilder(512); |
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@Override |
@Override |
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public boolean lookupDepartures(int stationID) { |
public boolean lookupDepartures(int stationID, boolean arrival) { |
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CacheEntry entry = departureCache.get(stationID); |
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boolean success; |
boolean success; |
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String key = "" + stationID + ":" + arrival; |
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departures = departureCache.get(key); |
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long now = android.os.SystemClock.elapsedRealtime(); |
if (departures == null) { |
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if (entry == null || (entry.timestamp+CACHE_TIMEOUT) < now) { |
success = lookupDeparturesWorker(stationID, arrival); |
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success = lookupDeparturesWorker(stationID); |
if (success) { |
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departureCache.put(key, departures); |
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if (success) { |
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entry = new CacheEntry(); |
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entry.timestamp = android.os.SystemClock.elapsedRealtime(); |
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entry.departures = departures; |
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departureCache.put(stationID, entry); |
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} |
} |
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} else { |
} else { |
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Log.i("XmlDepartureProvider", "cache hit !!!"); |
Log.i("XmlDepartureProvider", "cache hit !!!"); |
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success = true; |
success = true; |
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return success; |
return success; |
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} |
} |
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private boolean lookupDeparturesWorker(int stationID) { |
private boolean lookupDeparturesWorker(int stationID, boolean arrival) { |
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boolean success = false; |
boolean success = false; |
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departures = new ArrayList<DepartureBean>(); |
departures = new DepartureBean(); |
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try |
try |
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{ |
{ |
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int iArrival = arrival ? 1 : 0; |
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String url = XmlUtil.SERVICE_BASE + "/TrainInfoService/DepartureServlet?format=xml&station=" + stationID; |
String url = XmlUtil.SERVICE_BASE + "/DepartureServlet?format=xml&station=" + stationID + "&arrival=" + iArrival; |
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Log.i("xmlurl",url); |
Log.i("xmlurl",url); |
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String doc = DownloadUtil.getContentString(url, 45000, "ISO-8859-1"); |
String doc = DownloadUtil.getContentString(url, 45000, "ISO-8859-1"); |
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} |
} |
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@Override |
@Override |
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public List<DepartureBean> getDepartures(int station) { |
public DepartureBean getDepartures(int station,boolean arrival) { |
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CacheEntry entry = departureCache.get(station); |
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if (entry != null) { |
String key = "" + station + ":" + arrival; |
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return entry.departures; |
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} else { |
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return new ArrayList<DepartureBean>(); |
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} |
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DepartureBean bean = departureCache.get(key); |
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if (bean == null) { |
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bean = new DepartureBean(); |
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} |
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return bean; |
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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 |
// this can be called several times fore the same text-node if there are many chardata / lines |
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public void startElement (String uri, String name, String qName, Attributes atts)throws SAXException |
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")) |
if (name.equalsIgnoreCase("train")) |
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tempDeparture = new DepartureBean(); |
tempDeparture = new DepartureEntry(); |
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builder.setLength(0); //reset StringBuilder |
builder.setLength(0); //reset StringBuilder |
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} |
} |
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@Override |
@Override |
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public void endElement (String uri, String name, String qName) throws SAXException |
public void endElement (String uri, String name, String qName) throws SAXException |
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{ |
{ |
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if (name.equals("train")) { |
if (name.equals("train")) { |
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departures.add( tempDeparture ); |
departures.entries.add( tempDeparture ); |
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} else if (name.equals("time")) { |
} else if (name.equals("time")) { |
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tempDeparture.setTime(builder.toString().trim()); |
tempDeparture.setTime(builder.toString().trim()); |
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} else if (name.equals("updated")) { |
} else if (name.equals("updated")) { |
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tempDeparture.setStatus(builder.toString().trim()); |
tempDeparture.setStatus(builder.toString().trim()); |
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} else if (name.equals("note")) { |
} else if (name.equals("note")) { |
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tempDeparture.setNote(builder.toString().trim()); |
tempDeparture.setNote(builder.toString().trim()); |
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} |
} else if (name.equals("type")) { |
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tempDeparture.setType(builder.toString().trim()); |
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} else if (name.equals("notification")) { |
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departures.notifications.add( builder.toString().trim() ); |
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} |
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} |
} |
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} |
} |