Package org.apache.commons.collections4.functors

Class TransformerPredicate<T>

java.lang.Object

org.apache.commons.collections4.functors.AbstractPredicate<T>

org.apache.commons.collections4.functors.TransformerPredicate<T>

Type Parameters:

T - the type of the input to the predicate.

All Implemented Interfaces:

Serializable, Predicate<T>, Predicate<T>

public final class TransformerPredicate<T>
extends AbstractPredicate<T>
implements Serializable

Predicate implementation that returns the result of a transformer.

Since:

3.0

See Also:

• Serialized Form

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
Transformer<? super T,Boolean>	getTransformer()	Gets the transformer.
boolean	test(T object)	Evaluates the predicate returning the result of the decorated transformer.
static <T> Predicate<T>	transformerPredicate(Transformer<? super T,Boolean> transformer)	Creates the predicate.

Methods inherited from class org.apache.commons.collections4.functors.AbstractPredicate

evaluate

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Predicate

and, negate, or

Constructor Details

TransformerPredicate

public TransformerPredicate(Transformer<? super T,Boolean> transformer)

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

Parameters:

transformer - the transformer to decorate

Method Details

transformerPredicate

public static <T> Predicate<T> transformerPredicate(Transformer<? super T,Boolean> transformer)

Creates the predicate.

Type Parameters:

T - the type that the predicate queries

Parameters:

transformer - the transformer to decorate

Returns:

the predicate

Throws:

NullPointerException - if the transformer is null

getTransformer

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

Gets the transformer.

Returns:

the transformer

Since:

3.1

test

public boolean test(T object)

Evaluates the predicate returning the result of the decorated transformer.

Specified by:

test in interface Predicate<T>

Specified by:

test 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