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Java EE 5 SDK 深圳电信培训中心.徐海蛟老师. |
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上一个类 下一个类 | 框架 无框架 | ||||||||
摘要: REQUIRED | OPTIONAL | 详细信息: ELEMENT |
javax.persistence Annotation Type FieldResult
@Target(value={}) @Retention(value=RUNTIME) public @interface FieldResult
Is used to map the columns specified in the SELECT list of the query to the properties or fields of the entity class.
Example: Query q = em.createNativeQuery( "SELECT o.id AS order_id, " + "o.quantity AS order_quantity, " + "o.item AS order_item, " + "FROM Order o, Item i " + "WHERE (order_quantity > 25) AND (order_item = i.id)", "OrderResults"); @SqlResultSetMapping(name="OrderResults", entities={ @EntityResult(entityClass=com.acme.Order.class, fields={ @FieldResult(name="id", column="order_id"), @FieldResult(name="quantity", column="order_quantity"), @FieldResult(name="item", column="order_item")}) })
- 从以下版本开始:
- Java Persistence 1.0
Required Element Summary | |
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String |
column
Name of the column in the SELECT clause - i.e., column aliases, if applicable. |
String |
name
Name of the persistent field or property of the class. |
元素详细信息 |
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name
public abstract String name
- Name of the persistent field or property of the class.
column
public abstract String column
- Name of the column in the SELECT clause - i.e., column
aliases, if applicable.
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Java EE 5 SDK 深圳电信培训中心.徐海蛟老师. |
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上一个类 下一个类 | 框架 无框架 | ||||||||
摘要: REQUIRED | OPTIONAL | 详细信息: ELEMENT |
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