org.apache.openjpa.persistence.query
Interface SelectItem

All Superinterfaces:

OrderByItem

All Known Subinterfaces:

Aggregate, DomainObject, Expression, PathExpression

All Known Implementing Classes:

AbsExpression, AbstractDomainObject, ArrayExpression, AverageExpression, BinaryOperatorExpression, ConcatExpression, CountExpression, CurrentTimeExpression, DistinctExpression, DividedByExpression, ElseExpression, EntryExpression, FetchPath, IndexExpression, JoinPath, KeyExpression, LengthExpression, LiteralExpression, LocateExpression, LowerExpression, MaxExpression, MinExpression, MinusExpression, NewInstance, OperatorPath, ParameterExpression, PlusExpression, QueryDefinitionImpl, RangeExpression, RootPath, SizeExpression, SquareRootExpression, SubStringExpression, SumExpression, TimesExpression, TrimExpression, TypeExpression, UnaryMinusExpression, UpperExpression, ValueExpression, VarArgsExpression

public interface SelectItem
extends OrderByItem

SelectItem instances are used in specifying the query's select list.

The methods of this interface are used to define arguments that can be passed to the orderBy method for use in ordering selected items of the query result.

Method Summary

OrderByItem	asc() Return an OrderByItem referencing the SelectItem and specifying ascending ordering.
OrderByItem	desc() Return an OrderByItem referencing the SelectItem and specifying descending ordering.

Method Detail

asc

OrderByItem asc()

Return an OrderByItem referencing the SelectItem and specifying ascending ordering. The SelectItem must correspond to an orderable value.

Returns:

order-by item

desc

OrderByItem desc()

Return an OrderByItem referencing the SelectItem and specifying descending ordering. The SelectItem must correspond to an orderable value.

Returns:

order-by item