org.apache.commons.collections4.functors
Class TransformedPredicate<T>

java.lang.Object
  org.apache.commons.collections4.functors.TransformedPredicate<T>

All Implemented Interfaces:

Serializable, PredicateDecorator<T>, Predicate<T>

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

Predicate implementation that transforms the given object before invoking another Predicate.

Since:

3.1

Version:

$Id: TransformedPredicate.java 1476582 2013-04-27 14:13:54Z tn $

See Also:

Serialized Form

TransformedPredicate

public TransformedPredicate(Transformer<? super T,? extends T> transformer,
                            Predicate<? super T> predicate)

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

Parameters:

transformer - the transformer to use

predicate - the predicate to decorate

transformedPredicate

public static <T> Predicate<T> transformedPredicate(Transformer<? super T,? extends T> transformer,
                                                    Predicate<? super T> predicate)

Factory to create the predicate.

Type Parameters:

T - the type that the predicate queries

Parameters:

transformer - the transformer to call

predicate - the predicate to call with the result of the transform

Returns:

the predicate

Throws:

IllegalArgumentException - if the transformer or the predicate is null

evaluate

public boolean evaluate(T object)

Evaluates the predicate returning the result of the decorated predicate once the input has been transformed

Specified by:

evaluate in interface Predicate<T>

Parameters:

object - the input object which will be transformed

Returns:

true if decorated predicate returns true

getPredicates

public Predicate<? super T>[] getPredicates()

Gets the predicate being decorated.

Specified by:

getPredicates in interface PredicateDecorator<T>

Returns:

the predicate as the only element in an array

Since:

3.1

getTransformer

public Transformer<? super T,? extends T> getTransformer()

Gets the transformer in use.

Returns:

the transformer