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A Java library for transforming Google Transit Feed Spec feeds
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/**
 * Copyright (C) 2021 Cambridge Systematics, Inc.
 *
 * Licensed 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.onebusaway.gtfs_transformer.impl;

import org.onebusaway.gtfs.model.AgencyAndId;
import org.onebusaway.gtfs.model.Route;
import org.onebusaway.gtfs.model.Trip;
import org.onebusaway.gtfs.services.GtfsMutableRelationalDao;
import org.onebusaway.gtfs_transformer.services.GtfsTransformStrategy;
import org.onebusaway.gtfs_transformer.services.TransformContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

public class EnsureRouteLongNameExists implements GtfsTransformStrategy {

    private final Logger _log = LoggerFactory.getLogger(CheckForLengthyRouteNames.class);

    @Override
    public String getName() {
        return this.getClass().getSimpleName();
    }

    @Override
    public void run(TransformContext context, GtfsMutableRelationalDao dao) {
        // >
        HashMap> routeToHeadsignToCount = new HashMap();
        Collection trips = dao.getAllTrips();
        // go through each trip
        for (Trip trip : trips) {
            AgencyAndId routeId = trip.getRoute().getId();
            String headsign = trip.getTripHeadsign();
            // check route
            HashMap headsignCounts = routeToHeadsignToCount.get(trip.getRoute().getId());
            if (headsignCounts == null) {
                headsignCounts = new HashMap<>();
                routeToHeadsignToCount.put(routeId,headsignCounts);
            }
            if(headsignCounts.get(headsign) == null){
                headsignCounts.put(headsign, 0);
            }
            headsignCounts.put(headsign, headsignCounts.get(headsign) + 1);
        }
        for(Map.Entry> routeToHeadsignToCountEntry :
                routeToHeadsignToCount.entrySet()){
            String h1 = "";
            String h2 = "";
            int n1 = 0;
            int n2 = 0;
            for(Map.Entry headsignCount : routeToHeadsignToCountEntry.getValue().entrySet()){
                int n = headsignCount.getValue();
                String h = headsignCount.getKey();
                if(n>n2){
                    if(n>n1){
                        n2 = n1;
                        n1 = n;
                        h2 = h1;
                        h1 = h;
                    } else{
                        n2 = n;
                        h2 = h;
                    }
                }
            }
            Route route = dao.getRouteForId(routeToHeadsignToCountEntry.getKey());
            if(route.getLongName()!=null) {
                route.setLongName(h1 + " - " + h2);
                dao.updateEntity(route);
            }
        }
    }
}