使用hibernate时，你是否遇到如下蛋疼大场景

@Entity
@Table(name = "contr_Contract")
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
@MetaData(value = "合同")
public class Contract extends BaseEntity<Long> {
    
    @MetaData(value = "合同编号")
    @EntityAutoCode
    private String contrNo;
    
    @MetaData(value = "合同类型")
    @EntityAutoCode
    private ContrTypeEnum contrType;
    
    @MetaData(value = "销售合同")
    private SaleContract saleContr;
    
    @MetaData(value = "代理合同")
    private ProxyContract proxyContr;
    
    @MetaData(value = "租赁合同")
    private LeaseContract leaseContr;
    
    @MetaData(value = "赠予合同")
    private GiftContract giftContr;
...............略.........................
}

来吧 使用 Hibernate @any 

@Any( metaColumn = @Column( name = "contr_class_type" ), fetch=FetchType.EAGER ,optional=true)
    @AnyMetaDef( 
        idType = "long", 
        metaType = "string", 
        metaValues = {
            @MetaValue( value = "SALE", targetEntity = SaleContract.class),
            @MetaValue( value = "PROXY", targetEntity = ProxyContract.class ),
            @MetaValue( value = "LEASE", targetEntity = LeaseContract.class ),
            @MetaValue( value = "GIFT", targetEntity = GiftContract.class ),
        } )
    @JoinColumn( name = "contr_id" )
    @Index(name = "contr_id",columnNames={"contr_id"})
    public ContractBaseEntity getContr() {
        return contr;
    }









@Any ->
metaColumn = @Column( name = "contr_class_type" ) 辨别类别 具体存的是
@AnyMetaDef 定义的 @MeteValue.value 值