org.apache.commons.collections

## Interface Predicate

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

      public interface Predicate

  Defines a functor interface implemented by classes that perform a predicate test on an object.

  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 14:33:15 +0200 (Thu, 10 Apr 2008) $
  Author:
    James Strachan, Stephen Colebourne

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `evaluate(Object object)` Use the specified parameter to perform a test that returns true or false.

- - ### Method Detail

    - #### evaluate

          boolean evaluate(Object object)

      Use the specified parameter to perform a test that returns true or false.
      Parameters:
        `object` - the object to evaluate, should not be changed
      Returns:
        true or false
      Throws:
        `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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