由查詢定義的Hibernate實體屬性

我嘗試用Java和Hibernate實現文檔修改跟蹤系統。文檔的每個模塊都保存有autor和時間戳。要獲得文檔的創建者，我需要獲得最早的mod。那就是：由查詢定義的Hibernate實體屬性

@Entity 
@Table(name="Modifications") 
public class Modification 
{ 
    String autor; 
    Date dateTime; 
    Document document; 

    @ManyToOne 
    public Document getDocument() { 
    ... 
    } 

    // Author of this mod 
    @Column(name="Autor") 
    public String getAutor() { 
     ... 
    } 

    // and other properties 
} 

@Entity 
@Table(name="Documents") 
public class Document 
{ 
    private List<Modification> modifications; 

    @OneToMany(mappedBy="document") 
    public List<Modification> getModifications() { 
    ... 
    } 

    // this property is question about. How should I implement this with hibernate? 
    //I don't want to store "autor" field in entity, 
    //it should be determined with query to modifications table. 
    // But I can't find any example of defining properties this way... 
    // So I need your advices :) 
    public String getAutor() { 
    ... 
    } 

    // other properties 
}

來源

2011-09-02 Artyom Chernetsov