org.apache.commons.collections.functors
Class ClosureTransformer

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

public class ClosureTransformer
extends Object
implements Transformer, Serializable

Transformer implementation that calls a Closure using the input object and then returns the input.

Since:
Commons Collections 3.0
Version:
$Revision: 1.2 $ $Date: 2004/01/14 21:43:09 $
Author:
Stephen Colebourne
See Also:
Serialized Form

Constructor Summary
ClosureTransformer(Closure closure)
          Constructor that performs no validation.
 
Method Summary
static Transformer getInstance(Closure closure)
          Factory method that performs validation.
 Object transform(Object input)
          Call the closure.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ClosureTransformer

public ClosureTransformer(Closure closure)
Constructor that performs no validation. Use getInstance if you want that.
Parameters:
closure - the closure to call, not null
Method Detail

getInstance

public static Transformer getInstance(Closure closure)
Factory method that performs validation.
Parameters:
closure - the closure to call, not null
Returns:
the closure transformer
Throws:
IllegalArgumentException - if the closure is null

transform

public Object transform(Object input)
Call the closure.
Specified by:
transform in interface Transformer
Following copied from interface: org.apache.commons.collections.Transformer
Parameters:
input - the object to be transformed
Returns:
a transformed object
Throws:
ClassCastException - (runtime) if the input is the wrong class
IllegalArgumentException - (runtime) if the input is invalid
FunctorException - (runtime) if the transform cannot be completed


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