FieldResult (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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Java EE 5 SDK

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: 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")})
       })

Since:: Java Persistence 1.0

Required Element Summary

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.

Required Element Summary
`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.

Element Detail

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.