| Defines a functor interface implemented by classes that transform one
object into another.
A Transformer converts the input object to the output object.
The input object should be left unchanged.
Transformers are typically used for type conversions, or extracting data
from an object.
Standard implementations of common transformers are provided by
TransformerUtils . These include method invokation, returning a constant,
cloning and returning the string value.
since:
Commons Collections 1.0
version:
$Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
author:
James Strachan
author:
Stephen Colebourne |