org.apache.commons.collections.functors
Class InstanceofPredicate

java.lang.Object
  |
  +--org.apache.commons.collections.functors.InstanceofPredicate
All Implemented Interfaces:
Predicate, Serializable

public final class InstanceofPredicate
extends Object
implements Predicate, Serializable

Predicate implementation that returns true if the input is an instanceof the type stored in this predicate.

Since:
Commons Collections 3.0
Version:
$Revision: 1.3 $ $Date: 2004/01/14 21:43:09 $
Author:
Stephen Colebourne
See Also:
Serialized Form

Constructor Summary
InstanceofPredicate(Class type)
          Constructor that performs no validation.
 
Method Summary
 boolean evaluate(Object object)
          Return the predicate result.
static Predicate getInstance(Class type)
          Factory to create the identity predicate.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

InstanceofPredicate

public InstanceofPredicate(Class type)
Constructor that performs no validation. Use getInstance if you want that.
Parameters:
type - the type to check for
Method Detail

getInstance

public static Predicate getInstance(Class type)
Factory to create the identity predicate.
Parameters:
type - the type to check for, may not be null
Returns:
the predicate
Throws:
IllegalArgumentException - if the class is null

evaluate

public boolean evaluate(Object object)
Return the predicate result.
Specified by:
evaluate in interface Predicate
Following copied from interface: org.apache.commons.collections.Predicate
Parameters:
object - the object to evaluate
Returns:
true or false
Throws:
ClassCastException - (runtime) if the input is the wrong class
IllegalArgumentException - (runtime) if the input is invalid
FunctorException - (runtime) if the predicate encounters a problem


Copyright © 2001-2004 Apache Software Foundation. All Rights Reserved.