InputObject is the interface used by the
presentation block to get programming language typed data from data
encoded in a message.
The implementation of an
InputObject contains the
encoded data. When the presentation block asks for data the
InputObject is responsible for converting
the encoded representation of the data to the types expected by the
A particular encoding would subclass
InputObject. The subclass would provide methods to get
the data types appropriate to the presentation block (e.g., simple
types such as int or boolean, all the way to any type derived from
Note: the protocol block may also use the
obtain header metadata.