org.datanucleus.api.jdo.query

Class CollectionExpressionImpl<T extends Collection<E>,E>

java.lang.Object

org.datanucleus.api.jdo.query.ExpressionImpl<T>

org.datanucleus.api.jdo.query.CollectionExpressionImpl<T,E>

All Implemented Interfaces:

CollectionExpression<T,E>, Expression<T>

Direct Known Subclasses:

ListExpressionImpl

public class CollectionExpressionImpl<T extends Collection<E>,E>
extends ExpressionImpl<T>
implements CollectionExpression<T,E>

Implementation of a CollectionExpression

Constructor Summary

Constructors

Constructor and Description
CollectionExpressionImpl(Class<T> cls, String name, ExpressionType type)
CollectionExpressionImpl(PersistableExpression parent, String name)

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 class org.datanucleus.api.jdo.query.ExpressionImpl

cast, count, countDistinct, eq, eq, getQueryExpression, instanceOf, isParameter, isVariable, ne, ne

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.datanucleus.query.typesafe.Expression

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

Constructor Detail

CollectionExpressionImpl

public CollectionExpressionImpl(PersistableExpression parent,
                        String name)

CollectionExpressionImpl

public CollectionExpressionImpl(Class<T> cls,
                        String name,
                        ExpressionType type)

Method Detail

contains

public BooleanExpression contains(E elem)

Description copied from interface: CollectionExpression

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

Specified by:

contains in interface CollectionExpression<T extends Collection<E>,E>

Parameters:

elem - The element

Returns:

Whether it is contained here

contains

public BooleanExpression contains(Expression expr)

Description copied from interface: CollectionExpression

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

Specified by:

contains in interface CollectionExpression<T extends Collection<E>,E>

Parameters:

expr - The element expression

Returns:

Whether it is contained here

isEmpty

public BooleanExpression isEmpty()

Description copied from interface: CollectionExpression

Method returning whether the collection is empty.

Specified by:

isEmpty in interface CollectionExpression<T extends Collection<E>,E>

Returns:

Whether it is empty

size

public NumericExpression<Integer> size()

Description copied from interface: CollectionExpression

Method returning an expression for the size of the collection

Specified by:

size in interface CollectionExpression<T extends Collection<E>,E>

Returns:

The size