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- 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:
- Java Persistence 2.0
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description Selection<X>alias(String name)Assigns an alias to the selection item.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
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Method Detail
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alias
Selection<X> alias(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
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isCompoundSelection
boolean isCompoundSelection()
Whether the selection item is a compound selection.- Returns:
- boolean indicating whether the selection is a compound selection
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getCompoundSelectionItems
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:
IllegalStateException- if selection is not a compound selection
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Document created the 11/06/2005, last modified the 18/08/2025
Source of the printed document:https://www.gaudry.be/en/java-api-javaee-rf-javax/persistence/criteria/selection.html
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References
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