/**
 * TankTrain class
 * @author Isaac Shoebottom (3429069)
 */

public class TankTrain extends TrainCar {
    double litres;
    boolean hazardous;

    /**
     * The constructor for the tank train
     * @param code The unique code for the tank train
     * @param inspectionYr The year the train was last inspected
     * @param litres The litres the train is carrying
     * @param hazardous If the train is carrying hazardous materials
     */
    TankTrain(String code, int inspectionYr, double litres, boolean hazardous) {
        super(code, inspectionYr);
        this.litres = litres;
        this.hazardous = hazardous;
    }

    /**
     * The income calculator specific to tank train
     * @return The income of that train
     */
    @Override
    double calculateIncome() {
        return (hazardous) ? litres*17 : litres*9.5;
    }
}