src/main/java/design/model/Play.java


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package design.model;

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

public class Play {
    private final int distance;
    private final List<Swing> swings;

    // for deserialization
    private Play(int distance, List<Swing> swings) {
        this.distance = distance;
        this.swings = swings;
    }

    public Play(int distance) {
        this.swings = new ArrayList<>();
        this.distance = distance;
    }

    public int getDistance() {
        return distance;
    }

    public void addSwing(Swing swing) {
        swings.add(swing);
    }

    public Swing[] getSwings() {
        return swings.toArray(Swing[]::new);
    }

    public int getSwingCount() {
        return swings.size();
    }
}