com.conveyal.gtfs.model.CalendarDate Maven / Gradle / Ivy

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package com.conveyal.gtfs.model;

import com.conveyal.gtfs.GTFSFeed;
import com.conveyal.gtfs.error.DuplicateKeyError;
import com.google.common.base.Function;
import com.google.common.collect.Iterators;
import java.time.LocalDate;

import java.io.IOException;
import java.io.Serializable;
import java.util.Iterator;
import java.util.Map;

public class CalendarDate extends Entity implements Cloneable, Serializable {

    private static final long serialVersionUID = 6936614582249119431L;
    public String    service_id;
    public LocalDate date;
    public int       exception_type;

    public CalendarDate clone () {
        try {
            return (CalendarDate) super.clone();
        } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e);
        }
    }

    public static class Loader extends Entity.Loader {

        private final Map services;

        /**
         * Create a loader. The map parameter should be an in-memory map that will be modified. We can't write directly
         * to MapDB because we modify services as we load calendar dates, and this creates concurrentmodificationexceptions.
         */
        public Loader(GTFSFeed feed, Map services) {
            super(feed, "calendar_dates");
            this.services = services;
        }

        @Override
        protected boolean isRequired() {
            return false;
        }

        @Override
        public void loadOneRow() throws IOException {
            /* Calendars and Fares are special: they are stored as joined tables rather than simple maps. */
            String service_id = getStringField("service_id", true);
            Service service = services.computeIfAbsent(service_id, Service::new);
            LocalDate date = getDateField("date", true);
            if (service.calendar_dates.containsKey(date)) {
                feed.errors.add(new DuplicateKeyError(tableName, row, "(service_id, date)"));
            } else {
                CalendarDate cd = new CalendarDate();
                cd.sourceFileLine = row + 1; // offset line number by 1 to account for 0-based row index
                cd.service_id = service_id;
                cd.date = date;
                cd.exception_type = getIntField("exception_type", true, 1, 2);
                cd.feed = feed;
                service.calendar_dates.put(date, cd);
            }
        }
    }

    public static class Writer extends Entity.Writer {
        public Writer (GTFSFeed feed) {
            super(feed, "calendar_dates");
        }

        @Override
        protected void writeHeaders() throws IOException {
            writer.writeRecord(new String[] {"service_id", "date", "exception_type"});
        }

        @Override
        protected void writeOneRow(CalendarDate d) throws IOException {
            writeStringField(d.service_id);
            writeDateField(d.date);
            writeIntField(d.exception_type);
            endRecord();
        }

        @Override
        protected Iterator iterator() {
            Iterator serviceIterator = feed.services.values().iterator();
            return Iterators.concat(Iterators.transform(serviceIterator, new Function> () {
                @Override
                public Iterator apply(Service service) {
                    return service.calendar_dates.values().iterator();
                }
            }));
        }
    }
}