Module jakarta.data

Package jakarta.data.expression

Interface BooleanExpression<T>

Type Parameters:

T - entity type.

All Superinterfaces:

ComparableExpression<T,Boolean>, Expression<T,Boolean>

All Known Subinterfaces:

BooleanAttribute<T>, BooleanLiteral, BooleanPath<T,U>

public interface BooleanExpression<T>
extends ComparableExpression<T,Boolean>

An expression that evaluates to a true or false value.

The entity and static metamodel for the code examples within this class are shown in the Attribute Javadoc.

Since:

1.1

Method Summary

Modifier and Type	Method	Description
default Restriction<T>	isFalse()	Obtains a Restriction that requires that this expression evaluate to a false value.
default Restriction<T>	isTrue()	Obtains a Restriction that requires that this expression evaluate to a true value.
default Class<Boolean>	type()	Returns Boolean.class as the type of the boolean expression.

Methods inherited from interface jakarta.data.expression.ComparableExpression

between, between, greaterThan, greaterThan, greaterThanEqual, greaterThanEqual, lessThan, lessThan, lessThanEqual, lessThanEqual, notBetween, notBetween

Methods inherited from interface jakarta.data.expression.Expression

equalTo, equalTo, in, in, in, isNull, notEqualTo, notEqualTo, notIn, notIn, notIn, notNull, satisfies

Method Details

isFalse

default Restriction<T> isFalse()

Obtains a Restriction that requires that this expression evaluate to a false value.

Example:

     newVehicles = cars.search(make,
                               model,
                               _Car.previouslyOwned.isFalse());
 

Returns:

the restriction.

isTrue

default Restriction<T> isTrue()

Obtains a Restriction that requires that this expression evaluate to a true value.

Example:

     usedVehicles = cars.search(make,
                                model,
                                _Car.previouslyOwned.isTrue());
 

Returns:

the restriction.

type

default Class<Boolean> type()

Returns Boolean.class as the type of the boolean expression.

Specified by:

type in interface Expression<T,Boolean>

Returns:

Boolean.class.