JavaScript is disabled on your browser.
Skip navigation links
javax.persistence

Annotation Type EntityResult



  • @Target(value={})
     @Retention(value=RUNTIME)
    public @interface EntityResult
    Used in conjunction with the SqlResultSetMapping annotation to map the SELECT clause of a SQL query to an entity result.

    If this annotation is used, the SQL statement should select all of the columns that are mapped to the entity object. This should include foreign key columns to related entities. The results obtained when insufficient data is available are undefined.

     Example:
     Query q = em.createNativeQuery(
     "SELECT o.id, o.quantity, o.item, i.id, i.name, i.description "+
     "FROM Order o, Item i " +
     "WHERE (o.quantity> 25) AND (o.item = i.id)",
     "OrderItemResults");
     @SqlResultSetMapping(name="OrderItemResults",
     entities={
     @EntityResult(entityClass=com.acme.Order.class),
     @EntityResult(entityClass=com.acme.Item.class)
     })
     
    Since:
    Java Persistence 1.0
    See Also:
    SqlResultSetMapping
    • Required Element Summary

      Required Elements
      Modifier and Type Required Element and Description
      Class entityClass
      The class of the result.
    • Optional Element Summary

      Optional Elements
      Modifier and Type Optional Element and Description
      String discriminatorColumn
      Specifies the column name (or alias) of the column in the SELECT list that is used to determine the type of the entity instance.
      FieldResult[] fields
      Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.
    • Element Detail

      • entityClass

        public abstract Class entityClass
        The class of the result.
      • fields

        public abstract FieldResult[] fields
        Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.
        Default:
        {}
      • discriminatorColumn

        public abstract String discriminatorColumn
        Specifies the column name (or alias) of the column in the SELECT list that is used to determine the type of the entity instance.
        Default:
        ""
Skip navigation links

Copyright © 1996-2015, Oracle and/or its affiliates. All Rights Reserved. Use is subject to license terms.

AltStyle によって変換されたページ (->オリジナル) /