javax.jdo.query

Interface CollectionExpression<T extends Collection<E>,E>

Type Parameters:

T - Java type being represented here

E - Element type of the collection being represented here

All Superinterfaces:

Expression<T>

All Known Subinterfaces:

ListExpression<T,E>

public interface CollectionExpression<T extends Collection<E>,E>
extends Expression<T>

Representation of a collection in a query.

Method Summary

Modifier and Type	Method and Description
BooleanExpression	contains(E elem) Method returning whether the specified element is contained in this collection.
BooleanExpression	contains(Expression<E> expr) Method returning whether the specified element expression is contained in this collection.
BooleanExpression	isEmpty() Method returning whether the collection is empty.
NumericExpression<Integer>	size() Method returning an expression for the size of the collection

Methods inherited from interface javax.jdo.query.Expression

as, cast, count, countDistinct, eq, eq, instanceOf, ne, ne

Method Detail

contains

BooleanExpression contains(Expression<E> expr)

Method returning whether the specified element expression is contained in this collection.

Parameters:

expr - The element expression

Returns:

Whether it is contained here

contains

BooleanExpression contains(E elem)

Method returning whether the specified element is contained in this collection.

Parameters:

elem - The element

Returns:

Whether it is contained here

isEmpty

BooleanExpression isEmpty()

Method returning whether the collection is empty.

Returns:

Whether it is empty

size

NumericExpression<Integer> size()

Method returning an expression for the size of the collection

Returns:

The size