Java tutorial
/* * Copyright 2010-2015 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 static com.google.common.base.Preconditions.checkNotNull; import java.io.IOException; import java.util.ArrayList; import java.util.Calendar; import java.util.Collections; import java.util.Date; import java.util.EnumSet; import java.util.GregorianCalendar; import java.util.List; import java.util.Locale; import java.util.Set; import java.util.regex.Matcher; import java.util.regex.Pattern; import android.support.annotation.Nullable; import com.google.common.base.Strings; import de.schildbach.pte.dto.Departure; import de.schildbach.pte.dto.Line; import de.schildbach.pte.dto.Location; import de.schildbach.pte.dto.LocationType; import de.schildbach.pte.dto.NearbyLocationsResult; import de.schildbach.pte.dto.Position; import de.schildbach.pte.dto.Product; import de.schildbach.pte.dto.QueryDeparturesResult; import de.schildbach.pte.dto.QueryDeparturesResult.Status; import de.schildbach.pte.dto.QueryTripsContext; import de.schildbach.pte.dto.QueryTripsResult; import de.schildbach.pte.dto.ResultHeader; import de.schildbach.pte.dto.StationDepartures; import de.schildbach.pte.util.ParserUtils; /** * @author Andreas Schildbach */ public class SeptaProvider extends AbstractHafasProvider { private static final String API_BASE = "http://airs1.septa.org/bin/"; private static final long PARSER_DAY_ROLLOVER_THRESHOLD_MS = 12 * 60 * 60 * 1000; public SeptaProvider() { super(NetworkId.SEPTA, API_BASE + "stboard.exe/en", API_BASE + "ajax-getstop.exe/dny", API_BASE + "query.exe/en", 4); setStationBoardCanDoEquivs(false); setTimeZone("EST"); } @Override protected void setProductBits(final StringBuilder productBits, final Product product) { if (product == Product.HIGH_SPEED_TRAIN) { } else if (product == Product.REGIONAL_TRAIN || product == Product.SUBURBAN_TRAIN) { productBits.setCharAt(3, '1'); // Regional Rail } else if (product == Product.SUBWAY) { productBits.setCharAt(0, '1'); // Subway } else if (product == Product.TRAM) { productBits.setCharAt(1, '1'); // Trolley } else if (product == Product.BUS) { productBits.setCharAt(2, '1'); // Bus } else if (product == Product.ON_DEMAND || product == Product.FERRY || product == Product.CABLECAR) { } else { throw new IllegalArgumentException("cannot handle: " + product); } } @Override public NearbyLocationsResult queryNearbyLocations(final EnumSet<LocationType> types, final Location location, final int maxDistance, final int maxLocations) throws IOException { if (location.type == LocationType.STATION && location.hasId()) { final StringBuilder uri = new StringBuilder(stationBoardEndpoint); uri.append("?near=Anzeigen"); uri.append("&distance=").append(maxDistance != 0 ? maxDistance / 1000 : 50); uri.append("&input=").append(normalizeStationId(location.id)); return htmlNearbyStations(uri.toString()); } else { throw new IllegalArgumentException("cannot handle: " + location); } } @Override protected void appendDateTimeParameters(final StringBuilder uri, final Date time, final String dateParamName, final String timeParamName) { final Calendar c = new GregorianCalendar(timeZone); c.setTime(time); final int year = c.get(Calendar.YEAR); final int month = c.get(Calendar.MONTH) + 1; final int day = c.get(Calendar.DAY_OF_MONTH); final int hour = c.get(Calendar.HOUR); final int minute = c.get(Calendar.MINUTE); final String amPm = c.get(Calendar.AM_PM) == Calendar.AM ? "am" : "pm"; uri.append('&').append(dateParamName).append('='); uri.append(ParserUtils.urlEncode(String.format(Locale.ENGLISH, "%02d%02d%04d", month, day, year))); uri.append('&').append(timeParamName).append('='); uri.append(ParserUtils.urlEncode(String.format(Locale.ENGLISH, "%02d:%02d %s", hour, minute, amPm))); } private static final Pattern P_DEPARTURES_PAGE_COARSE = Pattern.compile(".*?" // + "(?:" // + "<div class=\"hfsTitleText\">([^<]*)<.*?" // location + "\n(\\d{2}/\\d{2}/\\d{4})[^\n]*\n" // date + "Departure (\\d{1,2}:\\d{2} [AP]M)\n.*?" // time + "(?:<table class=\"resultTable\"[^>]*>(.+?)</table>|(No trains in this space of time))" // + "|(input cannot be interpreted)|(Verbindung zum Server konnte leider nicht hergestellt werden|kann vom Server derzeit leider nicht bearbeitet werden))" // + ".*?" // , Pattern.DOTALL); private static final Pattern P_DEPARTURES_COARSE = Pattern.compile("<tr class=\"(depboard-\\w*)\">(.*?)</tr>", Pattern.DOTALL); private static final Pattern P_DEPARTURES_FINE = Pattern.compile(".*?" // + "<td class=\"time\">(\\d{1,2}:\\d{2} [AP]M)</td>\n" // plannedTime + "(?:<td class=\"[\\w ]*prognosis[\\w ]*\">\n" // + "(?: |<span class=\"rtLimit\\d\">(pünktlich|\\d{1,2}:\\d{2})</span>)\n</td>\n" // predictedTime + ")?.*?" // + "<img class=\"product\" src=\"/hafas-res/img/products/(\\w+)_pic\\.gif\" width=\"\\d+\" height=\"\\d+\" alt=\"([^\"]*)\".*?" // type, // line + "<strong>\n" // + "<a href=\"http://airs1\\.septa\\.org/bin/stboard\\.exe/en\\?input=(\\d+)&[^>]*>" // destinationId + "\\s*(.*?)\\s*</a>\n" // destination + "</strong>.*?" // + "(?:<td class=\"center sepline top\">\n(" + ParserUtils.P_PLATFORM + ").*?)?" // position , Pattern.DOTALL); @Override public QueryDeparturesResult queryDepartures(final String stationId, final @Nullable Date time, final int maxDepartures, final boolean equivs) throws IOException { checkNotNull(Strings.emptyToNull(stationId)); final ResultHeader header = new ResultHeader(network, SERVER_PRODUCT); final QueryDeparturesResult result = new QueryDeparturesResult(header); // scrape page final StringBuilder uri = new StringBuilder(stationBoardEndpoint); appendXmlStationBoardParameters(uri, time, stationId, maxDepartures, false, null); final CharSequence page = ParserUtils.scrape(uri.toString()); // parse page final Matcher mPageCoarse = P_DEPARTURES_PAGE_COARSE.matcher(page); if (mPageCoarse.matches()) { // messages if (mPageCoarse.group(5) != null) { result.stationDepartures.add(new StationDepartures(new Location(LocationType.STATION, stationId), Collections.<Departure>emptyList(), null)); return result; } else if (mPageCoarse.group(6) != null) return new QueryDeparturesResult(header, Status.INVALID_STATION); else if (mPageCoarse.group(7) != null) return new QueryDeparturesResult(header, Status.SERVICE_DOWN); final String[] placeAndName = splitStationName(ParserUtils.resolveEntities(mPageCoarse.group(1))); final Calendar currentTime = new GregorianCalendar(timeZone); currentTime.clear(); ParserUtils.parseAmericanDate(currentTime, mPageCoarse.group(2)); ParserUtils.parseAmericanTime(currentTime, mPageCoarse.group(3)); final List<Departure> departures = new ArrayList<Departure>(8); String oldZebra = null; final Matcher mDepCoarse = P_DEPARTURES_COARSE.matcher(mPageCoarse.group(4)); while (mDepCoarse.find()) { final String zebra = mDepCoarse.group(1); if (oldZebra != null && zebra.equals(oldZebra)) throw new IllegalArgumentException("missed row? last:" + zebra); else oldZebra = zebra; final Matcher mDepFine = P_DEPARTURES_FINE.matcher(mDepCoarse.group(2)); if (mDepFine.matches()) { final Calendar plannedTime = new GregorianCalendar(timeZone); plannedTime.setTimeInMillis(currentTime.getTimeInMillis()); ParserUtils.parseAmericanTime(plannedTime, mDepFine.group(1)); if (plannedTime.getTimeInMillis() - currentTime.getTimeInMillis() < -PARSER_DAY_ROLLOVER_THRESHOLD_MS) plannedTime.add(Calendar.DAY_OF_MONTH, 1); final Calendar predictedTime; final String prognosis = ParserUtils.resolveEntities(mDepFine.group(2)); if (prognosis != null) { predictedTime = new GregorianCalendar(timeZone); if (prognosis.equals("pnktlich")) { predictedTime.setTimeInMillis(plannedTime.getTimeInMillis()); } else { predictedTime.setTimeInMillis(currentTime.getTimeInMillis()); ParserUtils.parseAmericanTime(predictedTime, prognosis); } } else { predictedTime = null; } final String lineType = mDepFine.group(3); final Line line = parseLine(lineType, ParserUtils.resolveEntities(mDepFine.group(4)), false); final String destinationId = mDepFine.group(5); final String destinationName = ParserUtils.resolveEntities(mDepFine.group(6)); final Location destination; if (destinationId != null) { final String[] destinationPlaceAndName = splitStationName(destinationName); destination = new Location(LocationType.STATION, destinationId, destinationPlaceAndName[0], destinationPlaceAndName[1]); } else { destination = new Location(LocationType.ANY, null, null, destinationName); } final Position position = parsePosition(ParserUtils.resolveEntities(mDepFine.group(7))); final Departure dep = new Departure(plannedTime.getTime(), predictedTime != null ? predictedTime.getTime() : null, line, position, destination, null, null); if (!departures.contains(dep)) departures.add(dep); } else { throw new IllegalArgumentException( "cannot parse '" + mDepCoarse.group(2) + "' on " + stationId); } } result.stationDepartures.add(new StationDepartures( new Location(LocationType.STATION, stationId, placeAndName[0], placeAndName[1]), departures, null)); return result; } else { throw new IllegalArgumentException("cannot parse '" + page + "' on " + stationId); } } @Override public QueryTripsResult queryTrips(final Location from, final @Nullable Location via, final Location to, final Date date, final boolean dep, final @Nullable Set<Product> products, final @Nullable Optimize optimize, final @Nullable WalkSpeed walkSpeed, final @Nullable Accessibility accessibility, final @Nullable Set<Option> options) throws IOException { return queryTripsXml(from, via, to, date, dep, products, walkSpeed, accessibility, options); } @Override public QueryTripsResult queryMoreTrips(final QueryTripsContext context, final boolean later) throws IOException { return queryMoreTripsXml(context, later); } @Override protected String[] splitAddress(final String address) { final Matcher m = P_SPLIT_NAME_LAST_COMMA.matcher(address); if (m.matches()) return new String[] { m.group(2), m.group(1) }; return super.splitStationName(address); } @Override protected Product normalizeType(final String type) { final String ucType = type.toUpperCase(); // skip parsing of "common" lines, because this is America // Regional if (ucType.equals("RAI")) return Product.REGIONAL_TRAIN; // Subway if (ucType.equals("BSS")) return Product.SUBWAY; if (ucType.equals("BSL")) return Product.SUBWAY; if (ucType.equals("MFL")) return Product.SUBWAY; // Tram if (ucType.equals("TRM")) return Product.TRAM; if (ucType.equals("NHS")) // Tro NHSL return Product.TRAM; // Bus if (ucType.equals("BUS")) return Product.BUS; if (ucType.equals("TRO")) return Product.BUS; // from Connections: if (ucType.equals("RAIL")) return Product.REGIONAL_TRAIN; if (ucType.equals("SUBWAY")) return Product.SUBWAY; if (ucType.equals("TROLLEY")) return Product.BUS; return null; } }