Java Hibernate Criteria select子類

Question

我想通過從搜索值中獲取輸入來使用Criteria API來選擇實體。文檔可以有更多的收件人。收件人有很多子類

@Entity 
public class Document implements Serializable { 
    @OneToMany(mappedBy="document") 
    private List<Recipient> recipients = new ArrayList<Recipient>(); 


@Entity 
public class RecipientAccount extends Recipient { 
    String name; 

如何我可以選擇具有一定的名字ReciepientAccount所有文件？ 我需要搜索所有的子類並用OR連接它們。有沒有一種優雅的方式？

問候 米

Answer 1

下面應該工作：

Criteria c = session.createCriteria(Document.class, "document"); 
c.createAlias("document.recipients", "recipient"); 
c.add(Restrictions.in("recipient.class", Arrays.asList(SubClass1.class, 
                 SubClass2.class, 
                 SubClass3.class))); 
c.add(Restrictions.eq("recipient.name", theName));