org.datanucleus.query.typesafe

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>

All Known Implementing Classes:

CollectionExpressionImpl, ListExpressionImpl

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

Representation of a collection in a query.

Method Summary

Methods

Modifier and Type	Method and Description
BooleanExpression	contains(E elem) Method returning whether the specified element is contained in this collection.
BooleanExpression	contains(Expression expr) Method returning whether the specified elementexpression 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 org.datanucleus.query.typesafe.Expression

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

Method Detail

contains

BooleanExpression contains(Expression expr)

Method returning whether the specified elementexpression 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