Class NullIsTruePredicate<T>
java.lang.Object
org.apache.commons.collections4.functors.NullIsTruePredicate<T>
- All Implemented Interfaces:
Serializable,Predicate<T>,PredicateDecorator<T>,Predicate<T>
public final class NullIsTruePredicate<T>
extends Object
implements PredicateDecorator<T>, Serializable
Predicate implementation that returns true if the input is null.
- Since:
- 3.0
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionNullIsTruePredicate(Predicate<? super T> predicate) Constructor that performs no validation. -
Method Summary
Modifier and TypeMethodDescriptionbooleanEvaluates the predicate returning the result of the decorated predicate once a null check is performed.Gets the predicate being decorated.static <T> Predicate<T>nullIsTruePredicate(Predicate<? super T> predicate) Factory to create the null true predicate.
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Constructor Details
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NullIsTruePredicate
Constructor that performs no validation. UsenullIsTruePredicateif you want that.- Parameters:
predicate- the predicate to call after the null check
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Method Details
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nullIsTruePredicate
Factory to create the null true 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
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evaluate
Evaluates the predicate returning the result of the decorated predicate once a null check is performed. -
getPredicates
Gets the predicate being decorated.- Specified by:
getPredicatesin interfacePredicateDecorator<T>- Returns:
- the predicate as the only element in an array
- Since:
- 3.1
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