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GraphHopper is a fast and memory efficient Java road routing engine working seamlessly with OpenStreetMap data.

There is a newer version: 10.0

package com.graphhopper.config;

import com.fasterxml.jackson.annotation.JsonProperty;

import java.util.List;
import java.util.Set;

public class TurnCostsConfig {
    public static final int INFINITE_U_TURN_COSTS = -1;
    private int uTurnCosts = INFINITE_U_TURN_COSTS;
    private List vehicleTypes;
    // ensure that no typos can occur like motor_car vs motorcar or bike vs bicycle
    private static final Set ALL_SUPPORTED = Set.of(
            "agricultural", "atv", "auto_rickshaw",
            "bdouble", "bicycle", "bus", "caravan", "carpool", "coach", "delivery", "destination",
            "emergency", "foot", "golf_cart", "goods", "hazmat", "hgv", "hgv:trailer", "hov",
            "minibus", "mofa", "moped", "motorcar", "motorcycle", "motor_vehicle", "motorhome",
            "nev", "ohv", "psv", "residents",
            "share_taxi", "small_electric_vehicle", "speed_pedelec",
            "taxi", "trailer", "tourist_bus");

    public static TurnCostsConfig car() {
        return new TurnCostsConfig(List.of("motorcar", "motor_vehicle"));
    }

    public static TurnCostsConfig bike() {
        return new TurnCostsConfig(List.of("bicycle"));
    }

    // jackson
    public TurnCostsConfig() {
    }

    public TurnCostsConfig(List vehicleTypes) {
        this.vehicleTypes = check(vehicleTypes);
    }

    public TurnCostsConfig(List vehicleTypes, int uTurnCost) {
        this.vehicleTypes = check(vehicleTypes);
        this.uTurnCosts = uTurnCost;
    }

    public void setVehicleTypes(List vehicleTypes) {
        this.vehicleTypes = check(vehicleTypes);
    }

    List check(List restrictions) {
        if (restrictions == null || restrictions.isEmpty())
            throw new IllegalArgumentException("turn_costs cannot have empty vehicle_types");
        for (String r : restrictions) {
            if (!ALL_SUPPORTED.contains(r))
                throw new IllegalArgumentException("Currently we do not support the restriction: " + r);
        }
        return restrictions;
    }

    @JsonProperty("vehicle_types")
    public List getVehicleTypes() {
        check(vehicleTypes);
        return vehicleTypes;
    }

    public TurnCostsConfig setUTurnCosts(int uTurnCosts) {
        this.uTurnCosts = uTurnCosts;
        return this;
    }

    @JsonProperty("u_turn_costs")
    public int getUTurnCosts() {
        return uTurnCosts;
    }

    @Override
    public String toString() {
        return "vehicleTypes=" + vehicleTypes + ", uTurnCosts=" + uTurnCosts;
    }
}