look up geolocation by station

git-svn-id: https://public-transport-enabler.googlecode.com/svn/trunk@18 0924bc21-9374-b0fa-ee44-9ff1593b38f0

src/de/schildbach/pte/BahnProvider.java

@@ -111,6 +111,11 @@ public final class BahnProvider implements NetworkProvider
 		return (double) value / 1000000;
 	}
 	
+	public StationLocationResult stationLocation(final String stationId) throws IOException
+	{
+		throw new UnsupportedOperationException();
+	}
+
 	public String connectionsQueryUri(final String from, final String via, final String to, final Date date, final boolean dep)
 	{
 		final DateFormat DATE_FORMAT = new SimpleDateFormat("dd.MM.yy");

src/de/schildbach/pte/MvvProvider.java

@@ -78,6 +78,11 @@ public class MvvProvider implements NetworkProvider
 		throw new UnsupportedOperationException();
 	}
 
+	public StationLocationResult stationLocation(final String stationId) throws IOException
+	{
+		throw new UnsupportedOperationException();
+	}
+
 	public String connectionsQueryUri(final String from, final String via, final String to, final Date date, final boolean dep)
 	{
 		final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");

src/de/schildbach/pte/NetworkProvider.java

@@ -61,6 +61,8 @@ public interface NetworkProvider
 	 */
 	List<Station> nearbyStations(double lat, double lon, int maxDistance, int maxStations) throws IOException;
 
+	StationLocationResult stationLocation(String stationId) throws IOException;
+
 	/**
 	 * Construct an Uri for querying connections
 	 * 

src/de/schildbach/pte/RmvProvider.java

@@ -98,6 +98,36 @@ public class RmvProvider implements NetworkProvider
 			return stations.subList(0, maxStations);
 	}
 
+	private static Pattern P_STATION_LOCATION = Pattern
+			.compile("REQMapRoute0\\.Location0\\.X=(\\d+)&REQMapRoute0\\.Location0\\.Y=(\\d+)&REQMapRoute0\\.Location0\\.Name=(.+?)\"");
+
+	public StationLocationResult stationLocation(final String stationId) throws IOException
+	{
+		final String uri = "http://www.rmv.de/auskunft/bin/jp/stboard.exe/dn?L=vs_rmv&selectDate=today&time=now&showStBoard=yes&boardType=dep&maxJourneys=10&start&input="
+				+ stationId;
+
+		final CharSequence page = ParserUtils.scrape(uri);
+
+		final Matcher m = P_STATION_LOCATION.matcher(page);
+		if (m.find())
+		{
+			final double lon = latLonToDouble(Integer.parseInt(m.group(1)));
+			final double lat = latLonToDouble(Integer.parseInt(m.group(2)));
+			final String name = ParserUtils.resolveEntities(m.group(3));
+
+			return new StationLocationResult(lat, lon, name);
+		}
+		else
+		{
+			throw new IllegalArgumentException("cannot parse '" + page + "' on " + uri);
+		}
+	}
+
+	private static double latLonToDouble(int value)
+	{
+		return (double) value / 1000000;
+	}
+
 	public String connectionsQueryUri(final String from, final String via, final String to, final Date date, final boolean dep)
 	{
 		final DateFormat DATE_FORMAT = new SimpleDateFormat("dd.MM.yy");

src/de/schildbach/pte/StationLocationResult.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010 the original author or authors.
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package de.schildbach.pte;
+
+/**
+ * @author Andreas Schildbach
+ */
+public final class StationLocationResult
+{
+	public final double lat, lon;
+	public final String name;
+
+	public StationLocationResult(final double lat, final double lon, final String name)
+	{
+		this.lat = lat;
+		this.lon = lon;
+		this.name = name;
+	}
+}

src/de/schildbach/pte/VbbProvider.java

@@ -98,6 +98,11 @@ public final class VbbProvider implements NetworkProvider
 		throw new UnsupportedOperationException();
 	}
 
+	public StationLocationResult stationLocation(final String stationId) throws IOException
+	{
+		throw new UnsupportedOperationException();
+	}
+
 	public static final String STATION_URL_CONNECTION = "http://mobil.bvg.de/Fahrinfo/bin/query.bin/dox";
 
 	public String connectionsQueryUri(final String from, final String via, final String to, final Date date, final boolean dep)