Description
An S4 representation of the Command design pattern. The
Operation class is a simple implementation using closures and supports
forward and reverse (undo) evaluation. The more complicated Protocol
framework represents each type of command (or analytical protocol) by
a formal S4 class. Commands may be grouped and consecutively executed
using the Pipeline class. Example use cases include logging, do/undo,
analysis pipelines, GUI actions, parallel processing, etc.