将NativeQuery映射到实体

问题描述：

我无法尝试使用JPA映射原生SQL查询，并将Hibernate作为提供者进行映射。这是我使用用于此目的的实体代码：将NativeQuery映射到实体

package com.prueba.entities; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.EntityResult; 
import javax.persistence.FieldResult; 
import javax.persistence.Id; 
import javax.persistence.NamedNativeQuery; 
import javax.persistence.SqlResultSetMapping; 

@Entity 
@SqlResultSetMapping(name="CustomerOrderInfo",[email protected](entityClass=com.prueba.entities.JoinEntity.class, 
     fields={@FieldResult(name="id",column="id"),@FieldResult(name="title",column="title"), 
       @FieldResult(name="firstName",column="firstName"),@FieldResult(name="lastName",column="lastName"), 
       @FieldResult(name="orderId",column="oderId"),@FieldResult(name="shipping",column="shipping")})) 
@NamedNativeQuery(name="CustomerOrderInfoJoin",query="SELECT c.customer_id as id,c.title as title ,c.fname as firstName,c.lname as lastName,"+ 
"o.orderinfo_id as orderId,"+ 
"o.shipping as shipping FROM customer c,orderinfo o WHERE"+ 
"c.customer_id=o.customer_id") 
public class JoinEntity { 
    @Id 
    private Integer id; 
    @Column 
    private String title; 
    @Column 
    private String firstName; 
    @Column 
    private String lastName; 
    @Column 
    private Integer orderId; 
    @Column 
    private Double shipping; 


    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public String getTitle() { 
     return title; 
    } 

    public void setTitle(String title) { 
     this.title = title; 
    } 

    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    public Integer getOrderId() { 
     return orderId; 
    } 

    public void setOrderId(Integer orderId) { 
     this.orderId = orderId; 
    } 

    public Double getShipping() { 
     return shipping; 
    } 

    public void setShipping(Double shipping) { 
     this.shipping = shipping; 
    } 


}

当我尝试AS 5.1部署使用JBoss这个实体，我得到以下异常：

DEPLOYMENTS IN ERROR: 
    Deployment "<UNKNOWN jboss.j2ee:jar=Prueba.jar,name=CustomerSessionImpl,service=EJB3>" is in error due to the following reason(s): ** UNRESOLVED Demands 'persistence.unit:unitName=#pruebaPU' ** 
    Deployment "persistence.unit:unitName=#pruebaPU" is in error due to the following reason(s): org.hibernate.cfg.NotYetImplementedException: Pure native scalar queries are not yet supported 
    Deployment "<UNKNOWN jboss.j2ee:jar=Prueba.jar,name=OrderInfoSessionImpl,service=EJB3>" is in error due to the following reason(s): ** UNRESOLVED Demands 'persistence.unit:unitName=#pruebaPU' **

我真的不明白这个异常是什么意思，并且我想要修改为了让Native sql映射到我的实体中？非常感谢。

如果你可以发布定义persistence-unit＆session bean实现的xml，其中entityManager使用该单元。 – 2010-08-10 18:35:38

答

尝试使用小步骤，先获取@SqlResultSetMapping权限，然后在常规java类中执行@NamedNativeQuery部分或使用createNativeQuery。

答

我想你需要告诉你的NamedNativeQuery它应该使用SqlResultSetMapping。你可以用以下方法做到这一点：

@NamedNativeQuery(name="CustomerOrderInfoJoin",query="SELECT c.customer_id as id,c.title as title ,c.fname as firstName,c.lname as lastName,"+ 
    "o.orderinfo_id as orderId,"+ 
    "o.shipping as shipping FROM customer c,orderinfo o WHERE"+ 
    "c.customer_id=o.customer_id", 
    resultSetMapping = "CustomerOrderInfo") <--- Like this

将NativeQuery映射到实体

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