kit-programmieren-ws1920-final1/src/edu/kit/informatik/model/Engine.java

package edu.kit.informatik.model;

/**
 * Generic engine, is usually either diesel, steam or electric.
 *
 * @author Arne Keller
 * @version 1.0
 */
public abstract class Engine extends RollingStock {
    /**
     * Series/class of this engine.
     */
    private String series;
    /**
     * Name of this engine.
     */
    private String name;

    protected Engine(final String series, final String name,  final int length,
                     final boolean couplingFront, final boolean couplingBack) {
        super(length, couplingFront, couplingBack);
        this.series = series;
        this.name = name;
    }

    /**
     * @return the name of this engine
     */
    public String getName() {
        return name;
    }

    /**
     * @return the series of this engine
     */
    public String getSeries() {
        return series;
    }

    @Override
    public String getIdentifier() {
        return String.format("%s-%s", series, getName());
    }

    @Override
    public boolean canCoupleFrontTo(RollingStock rollingStock) {
        // train-sets can ONLY connect to other matching train-sets, not to engines.
        return hasCouplingFront() && rollingStock.hasCouplingBack() && !(rollingStock instanceof TrainSet);
    }

    @Override
    public boolean canCoupleToTrainSetSeries(String series) {
        return false;
    }
}