MediumCompressedNetworkRoute.java

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package org.matsim.core.population.routes.mediumcompressed;

import org.matsim.api.core.v01.Id;
import org.matsim.api.core.v01.network.Link;
import org.matsim.core.population.routes.AbstractNetworkRoute;
import org.matsim.core.population.routes.NetworkRoute;
import org.matsim.core.population.routes.heavycompressed.VarIntUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class MediumCompressedNetworkRoute extends AbstractNetworkRoute {

    private final static byte[] EMPTY_ROUTE = new byte[0];
    private byte[] route = EMPTY_ROUTE;

    public MediumCompressedNetworkRoute(Id<Link> startLinkId, Id<Link> endLinkId) {
        this.setStartLinkId(startLinkId);
        this.setEndLinkId(endLinkId);
    }

    @Override
    public void setLinkIds(Id<Link> startLinkId, List<Id<Link>> linkIds, Id<Link> endLinkId) {
        this.setStartLinkId(startLinkId);
        this.setEndLinkId(endLinkId);
        int linkCount = linkIds == null ? 0 : linkIds.size();
        int[] route = new int[linkCount];
        int i = 0;
        if (linkIds != null) {
            for (Id<Link> linkId : linkIds) {
                route[i] = linkId.index();
                i++;
            }
        }
        this.route = VarIntUtils.encode(route, 0, route.length);
    }

    @Override
    public List<Id<Link>> getLinkIds() {
        if (this.route == null || this.route == EMPTY_ROUTE) {
            return Collections.emptyList();
        }
        int[] idxRoute = VarIntUtils.decode(this.route);
        List<Id<Link>> linkIds = new ArrayList<>(idxRoute.length);
        for (int linkIndex : idxRoute) {
            linkIds.add(Id.get(linkIndex, Link.class));
        }
        return linkIds;
    }

    @Override
    public MediumCompressedNetworkRoute clone() {
        return (MediumCompressedNetworkRoute) super.clone();
    }

}