Java @IdClass未找到超类型

我想做一张桌子，假设桌子的名字是车。它将有3列，brandId、typeId和sizeId。我希望所有列都是主键。typeId和sizeId是来自不同表的列。我已经尝试使用@IdClass编写代码。但是，出现错误，找不到超类型

这是实体clas：

@Entity
@IdClass(CarPk.class)
@Table(name = "CAR")
public class Car implements Serializable {
    private static final long serialVersionUID = -1576946068763487642L;
    public Car() {
    }

    public Car(String brandId, TypeId typeId, SizeId sizeId) {
    this.brandId = brandId;
    this.typeId = typeId;
    this.sizeId = sizeId;
    }



   @Id
   @Column(name = "BRAND_ID", nullable = false, length = 20)
   private String brandId;

   @Id
   @ManyToOne
   @JoinColumn(name = "TYPE_ID", nullable = false)
   private TypeId typeId;

    @Id
    @ManyToOne
    @JoinColumn(name = "SIZE_ID", nullable = false)
    private SizeId sizeId;



public String getBrandId() {
    return brandId;
}

public void setBrandId(String brandId) {
    this.brandId= brandId;
}


public TypeId getTypeId() {
    return typeId;
}

public void setTypeId (TypeId typeId) {
    this.typeId= typeId;
}


public SizeId getSizeId() {
    return sizeId;
}

public void setSizeId (SizeId sizeId) {
    this.sizeId= sizeId;
}

}

这是CarPk级别：

public class CarPk implements Serializable {
    private static final long serialVersionUID = -1576946068763487642L;
    public CarPk() {
    }

    public CarPk(String brandId, TypeId typeId, SizeId sizeId) {
    this.brandId = brandId;
    this.typeId = typeId;
    this.sizeId = sizeId;
    }


private String brandId;
private TypeId typeId;
private SizeId sizeId;



public String getBrandId() {
    return brandId;
}

public void setBrandId(String brandId) {
    this.brandId= brandId;
}


public TypeId getTypeId() {
    return typeId;
}

public void setTypeId (TypeId typeId) {
    this.typeId= typeId;
}


public SizeId getSizeId() {
    return sizeId;
}

public void setSizeId (SizeId sizeId) {
    this.sizeId= sizeId;
}

}

这个代码怎么了？

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无论如何谢谢你

什么是TypeId和SizeId？你能给我们看看stacktrace吗？