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 booleanevaluate(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:
 getPredicatesin interfacePredicateDecorator<T>- Returns:
 - the predicate as the only element in an array
 - Since:
 - 3.1
 
 
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