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Java Enterprise Edition (EE)

FieldResult


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
 java.lang.String column
          Name of the column in the SELECT clause - i.e., column aliases, if applicable.
 java.lang.String name
          Name of the persistent field or property of the class.
 

Element Detail

name

public abstract java.lang.String name
Name of the persistent field or property of the class.

column

public abstract java.lang.String column
Name of the column in the SELECT clause - i.e., column aliases, if applicable.



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