| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.flink.training.exercises.common.datatypes; |
| |
| import org.apache.flink.training.exercises.common.utils.GeoUtils; |
| |
| import org.joda.time.DateTime; |
| import org.joda.time.format.DateTimeFormat; |
| import org.joda.time.format.DateTimeFormatter; |
| |
| import javax.annotation.Nullable; |
| |
| import java.io.Serializable; |
| import java.util.Locale; |
| |
| /** |
| * A TaxiRide is a taxi ride event. There are two types of events, a taxi ride start event and a |
| * taxi ride end event. The isStart flag specifies the type of the event. |
| * |
| * <p>A TaxiRide consists of |
| * - the rideId of the event which is identical for start and end record |
| * - the type of the event (start or end) |
| * - the time of the event |
| * - the longitude of the start location |
| * - the latitude of the start location |
| * - the longitude of the end location |
| * - the latitude of the end location |
| * - the passengerCnt of the ride |
| * - the taxiId |
| * - the driverId |
| */ |
| public class TaxiRide implements Comparable<TaxiRide>, Serializable { |
| |
| private static final DateTimeFormatter TIME_FORMATTER = |
| DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss").withLocale(Locale.US).withZoneUTC(); |
| |
| /** |
| * Creates a new TaxiRide with now as start and end time. |
| */ |
| public TaxiRide() { |
| this.startTime = new DateTime(); |
| this.endTime = new DateTime(); |
| } |
| |
| /** |
| * Creates a TaxiRide with the given parameters. |
| */ |
| public TaxiRide(long rideId, boolean isStart, DateTime startTime, DateTime endTime, |
| float startLon, float startLat, float endLon, float endLat, |
| short passengerCnt, long taxiId, long driverId) { |
| this.rideId = rideId; |
| this.isStart = isStart; |
| this.startTime = startTime; |
| this.endTime = endTime; |
| this.startLon = startLon; |
| this.startLat = startLat; |
| this.endLon = endLon; |
| this.endLat = endLat; |
| this.passengerCnt = passengerCnt; |
| this.taxiId = taxiId; |
| this.driverId = driverId; |
| } |
| |
| public long rideId; |
| public boolean isStart; |
| public DateTime startTime; |
| public DateTime endTime; |
| public float startLon; |
| public float startLat; |
| public float endLon; |
| public float endLat; |
| public short passengerCnt; |
| public long taxiId; |
| public long driverId; |
| |
| @Override |
| public String toString() { |
| return rideId + "," + |
| (isStart ? "START" : "END") + "," + |
| startTime.toString(TIME_FORMATTER) + "," + |
| endTime.toString(TIME_FORMATTER) + "," + |
| startLon + "," + |
| startLat + "," + |
| endLon + "," + |
| endLat + "," + |
| passengerCnt + "," + |
| taxiId + "," + |
| driverId; |
| } |
| |
| /** |
| * Parse a TaxiRide from a CSV representation. |
| */ |
| public static TaxiRide fromString(String line) { |
| |
| String[] tokens = line.split(","); |
| if (tokens.length != 11) { |
| throw new RuntimeException("Invalid record: " + line); |
| } |
| |
| TaxiRide ride = new TaxiRide(); |
| |
| try { |
| ride.rideId = Long.parseLong(tokens[0]); |
| |
| switch (tokens[1]) { |
| case "START": |
| ride.isStart = true; |
| ride.startTime = DateTime.parse(tokens[2], TIME_FORMATTER); |
| ride.endTime = DateTime.parse(tokens[3], TIME_FORMATTER); |
| break; |
| case "END": |
| ride.isStart = false; |
| ride.endTime = DateTime.parse(tokens[2], TIME_FORMATTER); |
| ride.startTime = DateTime.parse(tokens[3], TIME_FORMATTER); |
| break; |
| default: |
| throw new RuntimeException("Invalid record: " + line); |
| } |
| |
| ride.startLon = tokens[4].length() > 0 ? Float.parseFloat(tokens[4]) : 0.0f; |
| ride.startLat = tokens[5].length() > 0 ? Float.parseFloat(tokens[5]) : 0.0f; |
| ride.endLon = tokens[6].length() > 0 ? Float.parseFloat(tokens[6]) : 0.0f; |
| ride.endLat = tokens[7].length() > 0 ? Float.parseFloat(tokens[7]) : 0.0f; |
| ride.passengerCnt = Short.parseShort(tokens[8]); |
| ride.taxiId = Long.parseLong(tokens[9]); |
| ride.driverId = Long.parseLong(tokens[10]); |
| |
| } catch (NumberFormatException nfe) { |
| throw new RuntimeException("Invalid record: " + line, nfe); |
| } |
| |
| return ride; |
| } |
| |
| /** |
| * Compares this TaxiRide with the given one. |
| * |
| * <ul> |
| * <li>sort by timestamp,</li> |
| * <li>putting START events before END events if they have the same timestamp</li> |
| * </ul> |
| */ |
| public int compareTo(@Nullable TaxiRide other) { |
| if (other == null) { |
| return 1; |
| } |
| int compareTimes = Long.compare(this.getEventTime(), other.getEventTime()); |
| if (compareTimes == 0) { |
| if (this.isStart == other.isStart) { |
| return 0; |
| } |
| else { |
| if (this.isStart) { |
| return -1; |
| } |
| else { |
| return 1; |
| } |
| } |
| } |
| else { |
| return compareTimes; |
| } |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return other instanceof TaxiRide && |
| this.rideId == ((TaxiRide) other).rideId; |
| } |
| |
| @Override |
| public int hashCode() { |
| return (int) this.rideId; |
| } |
| |
| /** |
| * Gets the ride's time stamp (start or end time depending on {@link #isStart}). |
| */ |
| public long getEventTime() { |
| if (isStart) { |
| return startTime.getMillis(); |
| } |
| else { |
| return endTime.getMillis(); |
| } |
| } |
| |
| /** |
| * Gets the distance from the ride location to the given one. |
| */ |
| public double getEuclideanDistance(double longitude, double latitude) { |
| if (this.isStart) { |
| return GeoUtils.getEuclideanDistance((float) longitude, (float) latitude, this.startLon, this.startLat); |
| } else { |
| return GeoUtils.getEuclideanDistance((float) longitude, (float) latitude, this.endLon, this.endLat); |
| } |
| } |
| } |