package myorg.relex.one2manybi;
   
   import java.util.ArrayList;
   import java.util.Date;
   import java.util.List;
   import javax.persistence.*;
   /**
    * This class provides an example of the one/inverse side of a one-to-many, bi-directional 
    * relationship realized through a join-table mapped from the owning/many side.
   */
  @Entity
  @Table(name="RELATIONEX_PURCHASE")
  public class Purchase {
  	@Id @GeneratedValue
  	private int id;
  	
  	@OneToMany(
  			mappedBy="purchase", 
  			cascade={CascadeType.PERSIST, CascadeType.DETACH},
  			orphanRemoval=true
  		)
  	private List<SaleItem> items;
  	
  	@Temporal(TemporalType.TIMESTAMP)
  	@Column(nullable=false, updatable=false)
  	private Date date;
  	
  	protected Purchase() {}
  	public Purchase(Date date) {
  		this.date = date;
  	}
  
  	public int getId() { return id; }
  	public Date getDate() { return date; }
  	public List<SaleItem> getItems() {
  		if (items == null) {
  			items = new ArrayList<SaleItem>();
  		}
  		return items;
  	}
  	public Purchase addItem(SaleItem item) {
  		getItems().add(item);
  		return this;
  	}
  }