Most of java application developped using the layer paradigm needs to map java beans to java beans. This process is used to exchange data between the different layers of the application. As an example, the well known Data Transfert Object Pattern which is used to transfer data between software application subsystems heavyly uses mapping between beans of the different layers.
Bean Mapper is a utility that recursively maps java beans to java beans. The mapping between beans includes :
The quick reference will provide you a 2 minutes tutorial.
The detail documentation can be found here
The FAQ is also vailable here