org.apache.commons.collections.functors
Class NullIsExceptionPredicate
java.lang.Object
|
+--org.apache.commons.collections.functors.NullIsExceptionPredicate
- All Implemented Interfaces:
- Predicate, Serializable
- public final class NullIsExceptionPredicate
- extends Object
- implements Predicate, Serializable
Predicate implementation that throws an exception if the input is null.
- Since:
- Commons Collections 3.0
- Version:
- $Revision: 1.3 $ $Date: 2004/01/14 21:43:09 $
- Author:
- Stephen Colebourne
- See Also:
- Serialized Form
Method Summary |
boolean |
evaluate(Object object)
Return true if the object equals null else call the decorated predicate. |
static Predicate |
getInstance(Predicate predicate)
Factory to create the null exception predicate. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
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
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:
IllegalArgumentException
- if the predicate is null
evaluate
public boolean evaluate(Object object)
- Return true if the object equals null else call the decorated predicate.
- 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 classIllegalArgumentException
- (runtime) if the input is invalidFunctorException
- (runtime) if the predicate encounters a problem
Copyright © 2001-2004 Apache Software Foundation. All Rights Reserved.