PredicateTransformer (Apache Commons Collections 4.2 API)

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

All Implemented Interfaces:

Serializable, Transformer<T,Boolean>
```
public class PredicateTransformer<T>
extends Object
implements Transformer<T,Boolean>, Serializable
```
Transformer implementation that calls a Predicate using the input object and then returns the result.

Since:

3.0

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

PredicateTransformer(Predicate<? super T> predicate)
Constructor that performs no validation.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Predicate<? super T>`	`getPredicate()`	Gets the predicate.
`static <T> Transformer<T,Boolean>`	`predicateTransformer(Predicate<? super T> predicate)`	Factory method that performs validation.
`Boolean`	`transform(T input)`	Transforms the input to result by calling a predicate.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PredicateTransformer
```
public PredicateTransformer(Predicate<? super T> predicate)
```
    Constructor that performs no validation. Use predicateTransformer if you want that.
    
    Parameters:
    
    predicate - the predicate to call, not null
- Method Detail
  - predicateTransformer
```
public static <T> Transformer<T,Boolean> predicateTransformer(Predicate<? super T> predicate)
```
    Factory method that performs validation.
    
    Type Parameters:
    
    T - the input type
    
    Parameters:
    
    predicate - the predicate to call, not null
    
    Returns:
    
    the predicate transformer
    
    Throws:
    
    IllegalArgumentException - if the predicate is null
  - transform
```
public Boolean transform(T input)
```
    Transforms the input to result by calling a predicate.
    
    Specified by:
    
    transform in interface Transformer<T,Boolean>
    
    Parameters:
    
    input - the input object to transform
    
    Returns:
    
    the transformed result
  - getPredicate
```
public Predicate<? super T> getPredicate()
```
    Gets the predicate.
    
    Returns:
    
    the predicate
    
    Since:
    
    3.1