Top Description Methods
javax.persistence

public @Interface EntityResult

extends Annotation
Annotations
@Target
@Retention:RUNTIME
Imports
java.lang.annotation.Target, .Retention
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

Method Summary

Modifier and TypeMethod and Description
public 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.

public Class<T>
entityClass()

The class of the result.

public FieldResult[]
fields()

Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.

Inherited from java.lang.annotation.Annotation:
annotationTypeequalshashCodetoString

Method Detail

discriminatorColumnback to summary
public 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.

entityClassback to summary
public Class<T> entityClass()

The class of the result.

fieldsback to summary
public FieldResult[] fields()

Maps the columns specified in the SELECT list of the query to the properties or fields of the entity class.