Package org.apache.commons.collections4.functors

Class NotPredicate<T>

java.lang.Object

org.apache.commons.collections4.functors.AbstractPredicate<T>

org.apache.commons.collections4.functors.NotPredicate<T>

Type Parameters:

T - the type of the input to the predicate.

All Implemented Interfaces:

Serializable, Predicate<T>, PredicateDecorator<T>, Predicate<T>

public final class NotPredicate<T>
extends AbstractPredicate<T>
implements PredicateDecorator<T>, Serializable

Predicate implementation that returns the opposite of the decorated predicate.

Since:

3.0

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
NotPredicate(Predicate<? super T> predicate)	Constructor that performs no validation.

Method Summary

Modifier and Type	Method	Description
Predicate<? super T>[]	getPredicates()	Gets the predicate being decorated.
static <T> Predicate<T>	notPredicate(Predicate<? super T> predicate)	Creates the not predicate.
boolean	test(T object)	Evaluates the predicate returning the opposite to the stored predicate.

Methods inherited from class org.apache.commons.collections4.functors.AbstractPredicate

evaluate

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Predicate

and, negate, or

Methods inherited from interface org.apache.commons.collections4.Predicate

evaluate

Constructor Details

NotPredicate

public NotPredicate(Predicate<? super T> predicate)

Constructor that performs no validation. Use notPredicate if you want that.

Parameters:

predicate - the predicate to call after the null check

Method Details

notPredicate

public static <T> Predicate<T> notPredicate(Predicate<? super T> predicate)

Creates the not predicate.

Type Parameters:

T - the type that the predicate queries

Parameters:

predicate - the predicate to decorate, not null

Returns:

the predicate

Throws:

NullPointerException - if the predicate is null

getPredicates

public Predicate<? super T>[] getPredicates()

Gets the predicate being decorated.

Specified by:

getPredicates in interface PredicateDecorator<T>

Returns:

the predicate as the only element in an array

Since:

3.1

test

public boolean test(T object)

Evaluates the predicate returning the opposite to the stored predicate.

Specified by:

test in interface Predicate<T>

Specified by:

test in interface Predicate<T>

Parameters:

object - the input object

Returns:

true if predicate returns false