/** Calculate the wait time stats for boarding all (non-exact) frequency entries in this Ride. */
private Stats calcStatsForFreqs(TimeWindow window) {
Stats stats = new Stats(); // all stats fields are initialized to zero
stats.num = 0; // the total number of seconds that headway boarding is possible
for (PatternRide patternRide : patternRides) {
for (FrequencyEntry freq : patternRide.pattern.scheduledTimetable.frequencyEntries) {
if (freq.exactTimes) {
LOG.error("Exact times not yet supported in profile routing.");
return null;
}
int overlap = window.overlap(freq.startTime, freq.endTime, freq.tripTimes.serviceCode);
if (overlap > 0) {
if (freq.headway > stats.max) stats.max = freq.headway;
// weight the average of each headway by the number of seconds it is valid
stats.avg += (freq.headway / 2) * overlap;
stats.num += overlap;
}
}
}
if (stats.num == 0) return null;
/* Some frequency entries were added to the stats. */
stats.avg /= stats.num;
return stats;
}
/**
* Produce stats about boarding an initial Ride, which has no previous ride. This assumes arrival
* times are uniformly distributed during the window. The Ride must contain some trips, and the
* window must have a positive duration.
*/
public Stats calcStatsForBoarding(TimeWindow window) {
Stats stats = new Stats();
stats.min = 0; // You can always arrive just before a train departs.
List<Integer> departures = getSortedStoptimes(window, false);
int last = window.from;
double avgAccumulated = 0.0;
/* All departures in the list are known to be running and within the window. */
for (int dep : departures) {
int maxWait = dep - last;
if (maxWait > stats.max) stats.max = maxWait;
/* Weight the average of each interval by the number of seconds it contains. */
avgAccumulated += (maxWait / 2.0) * maxWait;
stats.num += maxWait;
last = dep;
}
if (stats.num > 0) {
stats.avg = (int) (avgAccumulated / stats.num);
}
return stats;
}