org.apache.commons.collections.functors
Class NotNullPredicate

java.lang.Object
  org.apache.commons.collections.functors.NotNullPredicate

All Implemented Interfaces:

java.io.Serializable, Predicate

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

Predicate implementation that returns true if the input is not null.

Since:

Commons Collections 3.0

Version:

$Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $

Author:

Stephen Colebourne

See Also:

Serialized Form

Field Summary

static Predicate

INSTANCE Singleton predicate instance

Method Summary

boolean	evaluate(java.lang.Object object) Evaluates the predicate returning true if the object does not equal null.
static Predicate	getInstance() Factory returning the singleton instance.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final Predicate INSTANCE

Singleton predicate instance

Method Detail

getInstance

public static Predicate getInstance()

Factory returning the singleton instance.

Returns:

the singleton instance

Since:

Commons Collections 3.1

evaluate

public boolean evaluate(java.lang.Object object)

Evaluates the predicate returning true if the object does not equal null.

Specified by:

evaluate in interface Predicate

Parameters:

object - the object to evaluate

Returns:

true if not null