package org.hso.ecommerce.entities.shop; import javax.persistence.*; @Entity @Table(name = "customer_order_positions") public class CustomerOrderPosition { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Basic public long id; @ManyToOne(optional = false) public CustomerOrder order; @ManyToOne(optional = false) public Article article; public int pricePerUnit; public int quantity; public int getSumPrice(){ return article.getPriceGross() * quantity; } }