All Known Implementing Classes:
    NotPredicate, NotNullPredicate, ExceptionPredicate, FalsePredicate, InstanceofPredicate, AllPredicate, NonePredicate, NullIsExceptionPredicate, IdentityPredicate, NullIsFalsePredicate, UniquePredicate, EqualPredicate, NullIsTruePredicate, TransformerPredicate, AnyPredicate, PredicateDecorator, TruePredicate, OnePredicate, AndPredicate, NullPredicate, OrPredicate, TransformedPredicate

A Predicate 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.

since: Commons - Collections 1.0

version: $ - Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $

author: James - Strachan

author: Stephen - Colebourne

 public boolean evaluate(Object object)
Use the specified parameter to perform a test that returns true or false.