Package org.apache.commons.collections.functors

Class NullPredicate

java.lang.Object

org.apache.commons.collections.functors.NullPredicate

All Implemented Interfaces:

java.io.Serializable, Predicate

@Deprecated(since="2021-04-30")
public final class NullPredicate
extends java.lang.Object
implements Predicate, java.io.Serializable

Deprecated.

Commons Collections 3 is in maintenance mode. Commons Collections 4 should be used instead.

Predicate implementation that returns true if the input is null.

Since:

Commons Collections 3.0

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static Predicate	INSTANCE	Deprecated. Singleton predicate instance

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(java.lang.Object object)	Deprecated. Evaluates the predicate returning true if the input is null.
static Predicate	getInstance()	Deprecated. Factory returning the singleton instance.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final Predicate INSTANCE

Deprecated.

Singleton predicate instance

Method Detail

getInstance

public static Predicate getInstance()

Deprecated.

Factory returning the singleton instance.

Returns:

the singleton instance

Since:

Commons Collections 3.1

evaluate

public boolean evaluate(java.lang.Object object)

Deprecated.

Evaluates the predicate returning true if the input is null.

Specified by:

evaluate in interface Predicate

Parameters:

object - the input object

Returns:

true if input is null