Package org.apache.commons.collections4.functors

Class TransformerPredicate<T>

java.lang.Object

org.apache.commons.collections4.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:

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

Methods inherited from class java.lang.Object

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

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)

Factory to create 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

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<? super T,Boolean> getTransformer()

Gets the transformer.

Returns:

the transformer

Since:

3.1