@Entity
public class Product {

    private Long id;
    private String sku;
    private String name;
    private BigDecimal price;
    private BigDecimal specialPrice;
    private BigInteger quantity;
    private BigInteger booked;
    private BigInteger ordered;
    private Set<Product> products;
    private List<Product> subProducts;

    public Product() {
        this.subProducts = new ArrayList<>();
    }

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getSku() {
        return this.sku;
    }

    public void setSku(String sku) {
        this.sku = sku;
    }

    public String getName() {
        return this.name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public BigDecimal getPrice() {
        return this.price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public BigDecimal getSpecialPrice() {
        return this.specialPrice;
    }

    public void setSpecialPrice(BigDecimal specialPrice) {
        this.specialPrice = specialPrice;
    }

    public BigInteger getQuantity() {
        return this.quantity;
    }

    public void setQuantity(BigInteger quantity) {
        this.quantity = quantity;
    }

    public BigInteger getBooked() {
        return this.booked;
    }

    public void setBooked(BigInteger booked) {
        this.booked = booked;
    }

    public BigInteger getOrdered() {
        return this.ordered;
    }

    public void setOrdered(BigInteger ordered) {
        this.ordered = ordered;
    }

    @ManyToMany(mappedBy = "products")
    public List<Product> getSubProducts() {
        return this.subProducts;
    }

    public void setSubProducts(List<Product> subProducts) {
        this.subProducts = subProducts;
    }

    @ManyToMany
    public Set<Product> getProducts() {
        return this.products;
    }

    public void setProducts(Set<Product> products) {
        this.products = products;
    }
}