Package javax.persistence.criteria
Interface Selection<X>
-
- Type Parameters:
X- the type of the selection item
- All Superinterfaces:
TupleElement<X>
- All Known Subinterfaces:
CollectionJoin<Z,E>,CompoundSelection<X>,CriteriaBuilder.Case<R>,CriteriaBuilder.Coalesce<T>,CriteriaBuilder.In<T>,CriteriaBuilder.SimpleCase<C,R>,Expression<T>,From<Z,X>,Join<Z,X>,ListJoin<Z,E>,MapJoin<Z,K,V>,ParameterExpression<T>,Path<X>,PluralJoin<Z,C,E>,Predicate,Root<X>,SetJoin<Z,E>,Subquery<T>
public interface Selection<X> extends TupleElement<X>
TheSelectioninterface defines an item that is to be returned in a query result.- Since:
- 2.0
-
-
Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description Selection<X>alias(java.lang.String name)Assigns an alias to the selection item.java.util.List<Selection<?>>getCompoundSelectionItems()Return the selection items composing a compound selection.booleanisCompoundSelection()Whether the selection item is a compound selection.-
Methods inherited from interface javax.persistence.TupleElement
getAlias, getJavaType
-
-
-
-
Method Detail
-
alias
Selection<X> alias(java.lang.String name)
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
-
isCompoundSelection
boolean isCompoundSelection()
Whether the selection item is a compound selection.- Returns:
- boolean indicating whether the selection is a compound selection
-
getCompoundSelectionItems
java.util.List<Selection<?>> getCompoundSelectionItems()
Return the selection items composing a compound selection. Modifications to the list do not affect the query.- Returns:
- list of selection items
- Throws:
java.lang.IllegalStateException- if selection is not a compound selection
-
-