NullIsTruePredicate (Apache Commons Collections 4.2 API)

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

All Implemented Interfaces:

Serializable, PredicateDecorator<T>, Predicate<T>
```
public final class NullIsTruePredicate<T>
extends Object
implements PredicateDecorator<T>, Serializable
```
Predicate implementation that returns true if the input is null.

Since:

3.0

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

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

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`evaluate(T object)`	Evaluates the predicate returning the result of the decorated predicate once a null check is performed.
`Predicate<? super T>[]`	`getPredicates()`	Gets the predicate being decorated.
`static <T> Predicate<T>`	`nullIsTruePredicate(Predicate<? super T> predicate)`	Factory to create the null true predicate.

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

- Constructor Detail
  - NullIsTruePredicate
```
public NullIsTruePredicate(Predicate<? super T> predicate)
```
    Constructor that performs no validation. Use nullIsTruePredicate if you want that.
    
    Parameters:
    
    predicate - the predicate to call after the null check
- Method Detail
  - nullIsTruePredicate
```
public static <T> Predicate<T> nullIsTruePredicate(Predicate<? super T> predicate)
```
    Factory to create the null true predicate.
    
    Type Parameters:
    
    T - the type that the predicate queries
    
    Parameters:
    
    predicate - the predicate to decorate, not null
    
    Returns:
    
    the predicate
    
    Throws:
    
    NullPointerException - if the predicate is null
  - evaluate
```
public boolean evaluate(T object)
```
    Evaluates the predicate returning the result of the decorated predicate once a null check is performed.
    
    Specified by:
    
    evaluate in interface Predicate<T>
    
    Parameters:
    
    object - the input object
    
    Returns:
    
    true if decorated predicate returns true or input is null
  - 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