Class UniquePredicate<T>
java.lang.Object
org.apache.commons.collections4.functors.UniquePredicate<T>
- All Implemented Interfaces:
Serializable
,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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Field Summary
FieldsModifier and TypeFieldDescriptionThe set of previously seen objectsprivate static final long
Serial version UID -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionboolean
Evaluates the predicate returning true if the input object hasn't been received yet.static <T> Predicate
<T> Factory to create the predicate.
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Field Details
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serialVersionUID
private static final long serialVersionUIDSerial version UID- See Also:
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iSet
The set of previously seen objects
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Constructor Details
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UniquePredicate
public UniquePredicate()Constructor that performs no validation. UseuniquePredicate
if you want that.
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Method Details
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uniquePredicate
Factory to create 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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evaluate
Evaluates the predicate returning true if the input object hasn't been received yet.
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