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public interface Predicate<T>
Defines a functor interface implemented by classes that perform a predicate test on an object.
APredicate
is the object equivalent of an if
statement.
It uses the input object to return a true or false value, and is often used in
validation or filtering.
Standard implementations of common predicates are provided by
PredicateUtils
. These include true, false, instanceof, equals, and,
or, not, method invokation and null testing.
Method Summary | |
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boolean |
evaluate(T object)
Use the specified parameter to perform a test that returns true or false. |
Method Detail |
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boolean evaluate(T object)
object
- the object to evaluate, should not be changed
ClassCastException
- (runtime) if the input is the wrong class
IllegalArgumentException
- (runtime) if the input is invalid
FunctorException
- (runtime) if the predicate encounters a problem
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