Class NullIsTruePredicate<T>
- java.lang.Object
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- org.apache.commons.collections4.functors.NullIsTruePredicate<T>
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- All Implemented Interfaces:
java.io.Serializable
,PredicateDecorator<T>
,Predicate<T>
public final class NullIsTruePredicate<T> extends java.lang.Object implements PredicateDecorator<T>, java.io.Serializable
Predicate implementation that returns true if the input is null.- Since:
- 3.0
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description NullIsTruePredicate(Predicate<? super T> predicate)
Constructor that performs no validation.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
evaluate(T object)
Evaluates the predicate returning the result of the decorated predicate once a null check is performed.Predicate<? super T>[]
getPredicates()
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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Method Detail
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nullIsTruePredicate
public static <T> Predicate<T> nullIsTruePredicate(Predicate<? super T> predicate)
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:
java.lang.NullPointerException
- if the predicate is null
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evaluate
public boolean evaluate(T object)
Evaluates the predicate returning the result of the decorated predicate once a null check is performed.
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getPredicates
public Predicate<? super T>[] getPredicates()
Gets the predicate being decorated.- Specified by:
getPredicates
in interfacePredicateDecorator<T>
- Returns:
- the predicate as the only element in an array
- Since:
- 3.1
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