Fast Object Database for Java - with JPA/JDO support

javax.persistence.criteria.Selection - JPA interface

Superinterfaces:
TupleElement<X>
Subinterfaces:
CollectionJoin, CompoundSelection, Case, Coalesce, In, SimpleCase, Expression, From, Join, ListJoin, MapJoin, ParameterExpression, Path, PluralJoin, Predicate, Root, SetJoin, Subquery
The Selection interface defines an item that is to be returned in a query result.
Since:
JPA 2.0
Learn how to use JPA Criteria API's Selection in Chapter 4 of the ObjectDB/JPA manual.
Selection<X> alias(String name)
Assigns an alias to the selection item.
Assigns an alias to the selection item. Once assigned, an alias cannot be changed or reassigned. Returns the same selection item.
Parameters:
name - alias
Returns:
selection item
Since:
JPA 2.0
String getAlias()
Return the alias assigned to the tuple element or null, if no alias has been assigned.
Return the alias assigned to the tuple element or null, if no alias has been assigned.
Returns:
alias
Since:
JPA 2.0
Return the selection items composing a compound selection.
Return the selection items composing a compound selection. Modifications to the list do not affect the query.
Returns:
list of selection items
Throws:
IllegalStateException - if selection is not a compound selection
Since:
JPA 2.0
Class<?> getJavaType()
Return the Java type of the tuple element.
Return the Java type of the tuple element.
Returns:
the Java type of the tuple element
Since:
JPA 2.0
Whether the selection item is a compound selection.
Whether the selection item is a compound selection.
Returns:
boolean indicating whether the selection is a compound selection
Since:
JPA 2.0