Class UniquePredicate<T>
java.lang.Object
org.apache.commons.collections4.functors.AbstractPredicate<T>
org.apache.commons.collections4.functors.UniquePredicate<T>
- Type Parameters:
T- the type of the input to the predicate.
- All Implemented Interfaces:
Serializable,Predicate<T>,Predicate<T>
Predicate implementation that returns true the first time an object is
passed into the predicate.
- Since:
- 3.0
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbooleanEvaluates the predicate returning true if the input object hasn't been received yet.static <T> Predicate<T> Creates the predicate.Methods inherited from class org.apache.commons.collections4.functors.AbstractPredicate
evaluate
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Constructor Details
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UniquePredicate
public UniquePredicate()Constructor that performs no validation. UseuniquePredicateif you want that.
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Method Details
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uniquePredicate
Creates the predicate.- Type Parameters:
T- the type that the predicate queries- Returns:
- the predicate
- Throws:
IllegalArgumentException- if the predicate is null
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test
Evaluates the predicate returning true if the input object hasn't been received yet.
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