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A Java library for transforming Google Transit Feed Spec feeds
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/**
 * Copyright (C) 2018 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.Route;
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.ArrayList;
import java.util.HashMap;

/*
First, remove shuttle routes:
7-SS, N-SS etc
Set fields in the route based on route in reference file.  Please note: this is only matching
on ids that are not more than 2 characters and will truncate longer ids
 */
public class MergeRouteAndRemoveShuttles implements GtfsTransformStrategy {

    private final Logger _log = LoggerFactory.getLogger(MergeRouteAndRemoveShuttles.class);
    @Override
    public String getName() {
        return this.getClass().getSimpleName();
    }

    @Override
    public void run(TransformContext context, GtfsMutableRelationalDao dao) {
        GtfsMutableRelationalDao reference = (GtfsMutableRelationalDao) context.getReferenceReader().getEntityStore();
        RemoveEntityLibrary removeEntityLibrary = new RemoveEntityLibrary();

        HashMap referenceRoutes = new HashMap<>();
        for (Route route : reference.getAllRoutes()) {
            referenceRoutes.put(route.getId().getId(), route);
        }

        ArrayList routesToRemove = new ArrayList();

        for (Route route: dao.getAllRoutes()) {
            String identifier = route.getId().getId();
            //remove the shuttle routes.  They all appear to be -SS
            if (identifier.contains("-SS")) {
                _log.info("Removing route: " + identifier);
                routesToRemove.add(route);
            }
            else if (identifier.length() > 2) {
                identifier = identifier.substring(0,2);
            }

            Route refRoute = referenceRoutes.get(identifier);
            if (refRoute != null) {
                route.setShortName(refRoute.getShortName());
                route.setLongName(refRoute.getLongName());
                route.setType(refRoute.getType());
                route.setDesc(refRoute.getDesc());
                route.setUrl(refRoute.getUrl());
                route.setColor(refRoute.getColor());
                route.setTextColor(refRoute.getTextColor());
                route.setId(refRoute.getId());
            }
        }

        for (Route route : routesToRemove) {
            removeEntityLibrary.removeRoute(dao, route);
        }
    }
}