nearby stations for Hannover

git-svn-id: https://public-transport-enabler.googlecode.com/svn/trunk@206 0924bc21-9374-b0fa-ee44-9ff1593b38f0
2025-07-17 09:49:49 +00:00 · 2010-09-27 00:31:57 +00:00 · 2010-09-27 00:31:57 +00:00 · a69ec021cc
commit a69ec021cc
parent b6d65bf8fd
3 changed files with 225 additions and 71 deletions
--- a/src/de/schildbach/pte/AbstractEfaProvider.java
+++ b/src/de/schildbach/pte/AbstractEfaProvider.java
@ -0,0 +1,115 @@
+/*
+ * 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;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * @author Andreas Schildbach
+ */
+public abstract class AbstractEfaProvider implements NetworkProvider
+{
+	private static final Pattern P_AUTOCOMPLETE = Pattern.compile("" //
+			+ "(?:" //
+			+ "<itdOdvAssignedStop stopID=\"(\\d+)\" x=\"(\\d+)\" y=\"(\\d+)\" mapName=\"WGS84\" [^>]* nameWithPlace=\"([^\"]*)\"" //
+			+ "|" //
+			+ "<odvNameElem [^>]* locality=\"([^\"]*)\"" //
+			+ ")");
+
+	protected abstract String autocompleteUri(final CharSequence constraint);
+
+	public List<Autocomplete> autocompleteStations(final CharSequence constraint) throws IOException
+	{
+		final CharSequence page = ParserUtils.scrape(autocompleteUri(constraint));
+
+		final List<Autocomplete> results = new ArrayList<Autocomplete>();
+
+		final Matcher m = P_AUTOCOMPLETE.matcher(page);
+		while (m.find())
+		{
+			if (m.group(1) != null)
+			{
+				final int sId = Integer.parseInt(m.group(1));
+				// final double sLon = latLonToDouble(Integer.parseInt(mAutocomplete.group(2)));
+				// final double sLat = latLonToDouble(Integer.parseInt(mAutocomplete.group(3)));
+				final String sName = m.group(4).trim();
+				results.add(new Autocomplete(LocationType.STATION, sId, sName));
+			}
+			else if (m.group(5) != null)
+			{
+				final String sName = m.group(5).trim();
+				results.add(new Autocomplete(LocationType.ANY, 0, sName));
+			}
+		}
+
+		return results;
+	}
+
+	private static final Pattern P_NEARBY = Pattern.compile("<itdOdvAssignedStop " // 
+			+ "(?:stopID=\"(\\d+)\" x=\"(\\d+)\" y=\"(\\d+)\" mapName=\"WGS84\" [^>]*? nameWithPlace=\"([^\"]*)\" distance=\"(\\d+)\"" //
+			+ "|distance=\"(\\d+)\" [^>]*? nameWithPlace=\"([^\"]*)\" [^>]*? stopID=\"(\\d+)\" [^>]*? x=\"(\\d+)\" y=\"(\\d+)\"" //
+			+ ")");
+
+	protected abstract String nearbyLatLonUri(double lat, double lon);
+
+	protected abstract String nearbyStationUri(String stationId);
+
+	public List<Station> nearbyStations(final String stationId, final double lat, final double lon, final int maxDistance, final int maxStations)
+			throws IOException
+	{
+		String uri = null;
+		if (lat != 0 || lon != 0)
+			uri = nearbyLatLonUri(lat, lon);
+		if (uri == null && stationId != null)
+			uri = nearbyStationUri(stationId);
+		if (uri == null)
+			throw new IllegalArgumentException("at least one of stationId or lat/lon must be given");
+
+		final CharSequence page = ParserUtils.scrape(uri);
+
+		final List<Station> stations = new ArrayList<Station>();
+
+		final Matcher mNearby = P_NEARBY.matcher(page);
+		while (mNearby.find())
+		{
+			final boolean firstSyntax = mNearby.group(1) != null;
+			final int sId = Integer.parseInt(mNearby.group(firstSyntax ? 1 : 8));
+			final double sLon = latLonToDouble(Integer.parseInt(mNearby.group(firstSyntax ? 2 : 9)));
+			final double sLat = latLonToDouble(Integer.parseInt(mNearby.group(firstSyntax ? 3 : 10)));
+			final String sName = mNearby.group(firstSyntax ? 4 : 7).trim();
+			final int sDist = Integer.parseInt(mNearby.group(firstSyntax ? 5 : 6));
+
+			final Station station = new Station(sId, sName, sLat, sLon, sDist, null, null);
+			stations.add(station);
+		}
+
+		if (maxStations == 0 || maxStations >= stations.size())
+			return stations;
+		else
+			return stations.subList(0, maxStations);
+	}
+
+	private static double latLonToDouble(final int value)
+	{
+		return (double) value / 1000000;
+	}
+}