org.apache.commons.collections.functors

Class NullIsExceptionPredicate

java.lang.Object

org.apache.commons.collections.functors.NullIsExceptionPredicate

All Implemented Interfaces:

java.io.Serializable, PredicateDecorator, Predicate

public final class NullIsExceptionPredicate
extends java.lang.Object
implements Predicate, PredicateDecorator, java.io.Serializable

Predicate implementation that throws an exception if the input is null.

Since:

Commons Collections 3.0

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NullIsExceptionPredicate(Predicate predicate) Constructor that performs no validation.

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(java.lang.Object object) Evaluates the predicate returning the result of the decorated predicate once a null check is performed.
static Predicate	getInstance(Predicate predicate) Factory to create the null exception predicate.
Predicate[]	getPredicates() Gets the predicate being decorated.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullIsExceptionPredicate

public NullIsExceptionPredicate(Predicate predicate)

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

Parameters:

predicate - the predicate to call after the null check

Method Detail

getInstance

public static Predicate getInstance(Predicate predicate)

Factory to create the null exception predicate.

Parameters:

predicate - the predicate to decorate, not null

Returns:

the predicate

Throws:

java.lang.IllegalArgumentException - if the predicate is null

evaluate

public boolean evaluate(java.lang.Object object)

Evaluates the predicate returning the result of the decorated predicate once a null check is performed.

Specified by:

evaluate in interface Predicate

Parameters:

object - the input object

Returns:

true if decorated predicate returns true

Throws:

FunctorException - if input is null

getPredicates

public Predicate[] getPredicates()

Gets the predicate being decorated.

Specified by:

getPredicates in interface PredicateDecorator

Returns:

the predicate as the only element in an array

Since:

Commons Collections 3.1