Package com.querydsl.core.types.dsl

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

java.lang.Object

com.querydsl.core.types.dsl.DslExpression<T>

com.querydsl.core.types.dsl.CollectionExpressionBase<T,E>

Type Parameters:

T - expression type

E - collection element type

All Implemented Interfaces:

CollectionExpression<T,E>, Expression<T>, ParameterizedExpression<T>, Serializable

Direct Known Subclasses:

CollectionOperation, CollectionPathBase

public abstract class CollectionExpressionBase<T extends Collection<E>,E>
extends DslExpression<T>
implements CollectionExpression<T,E>

CollectionExpressionBase is an abstract base class for CollectionExpression implementations

Author:

tiwe

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.querydsl.core.types.dsl.DslExpression

hashCode, mixin

Constructor Summary

Constructors

Constructor	Description
CollectionExpressionBase(Expression<T> mixin)

Method Summary

Modifier and Type	Method	Description
DslExpression<E>	as(EntityPath<E> alias)
final BooleanExpression	contains(Expression<E> child)	Create a this.contains(child) expression
final BooleanExpression	contains(E child)	Create a this.contains(child) expression
abstract Class<E>	getElementType()	Get the element type
final BooleanExpression	isEmpty()	Create a this.isEmpty() expression
final BooleanExpression	isNotEmpty()	Create a !this.isEmpty() expression
final NumberExpression<Integer>	size()	Create a this.size() expression

Methods inherited from class com.querydsl.core.types.dsl.DslExpression

as, as, equals, getType, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.querydsl.core.types.Expression

accept, getType

Methods inherited from interface com.querydsl.core.types.ParameterizedExpression

getParameter

Constructor Details

CollectionExpressionBase

public CollectionExpressionBase(Expression<T> mixin)

Method Details

as

public DslExpression<E> as(EntityPath<E> alias)

contains

public final BooleanExpression contains(E child)

Create a this.contains(child) expression

Evaluates to true, if child is contained in this

Parameters:

child - element to check

Returns:

this.contains(child)

contains

public final BooleanExpression contains(Expression<E> child)

Create a this.contains(child) expression

Evaluates to true, if child is contained in this

Parameters:

child - element to check

Returns:

this.contains(child)

getElementType

public abstract Class<E> getElementType()

Get the element type

Returns:

element type

isEmpty

public final BooleanExpression isEmpty()

Create a this.isEmpty() expression

Evaluates to true, if this has no elements.

Returns:

this.isEmpty()

isNotEmpty

public final BooleanExpression isNotEmpty()

Create a !this.isEmpty() expression

Evaluates to true, if this has elements

Returns:

!this.isEmpty()

size

public final NumberExpression<Integer> size()

Create a this.size() expression

Gets the number of elements in this collection

Returns:

this.size()