org.apache.commons.collections.functors
Class TransformerPredicate<T>

java.lang.Object
  org.apache.commons.collections.functors.TransformerPredicate<T>

All Implemented Interfaces:

Serializable, Predicate<T>

public final class TransformerPredicate<T>
extends Object
implements Predicate<T>, Serializable

Predicate implementation that returns the result of a transformer.

Since:

Commons Collections 3.0

Version:

$Revision: 1.1.1.1 $ $Date: 2005/05/23 04:34:40 $

Author:

Matt Hall, John Watkinson, Stephen Colebourne

See Also:

Serialized Form

Constructor Summary

TransformerPredicate(Transformer<T,Boolean> transformer)
Constructor that performs no validation.

Method Summary

boolean	evaluate(T object) Evaluates the predicate returning the result of the decorated transformer.
static <T> Predicate<T>	getInstance(Transformer<T,Boolean> transformer) Factory to create the predicate.
Transformer<T,Boolean>	getTransformer() Gets the transformer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransformerPredicate

public TransformerPredicate(Transformer<T,Boolean> transformer)

Constructor that performs no validation. Use getInstance if you want that.

Parameters:

transformer - the transformer to decorate

Method Detail

getInstance

public static <T> Predicate<T> getInstance(Transformer<T,Boolean> transformer)

Factory to create the predicate.

Parameters:

transformer - the transformer to decorate

Returns:

the predicate

Throws:

IllegalArgumentException - if the transformer is null

evaluate

public boolean evaluate(T object)

Evaluates the predicate returning the result of the decorated transformer.

Specified by:

evaluate in interface Predicate<T>

Parameters:

object - the input object

Returns:

true if decorated transformer returns Boolean.TRUE

Throws:

FunctorException - if the transformer returns an invalid type

getTransformer

public Transformer<T,Boolean> getTransformer()

Gets the transformer.

Returns:

the transformer

Since:

Commons Collections 3.1