BackendAPI

This module defines the BackendAPI class, alongside a few helpers. Its goal is to delegate to backends the responsibility of creating the parsers for the metadata API. Each backend is expected to provide a list of CommandParser, which in turn is a simple function from command name and command arguments to a corresponding parser. Command parsers can easily be created using the commandParser function.

Furthermore, for each set of related features, such as table tracking commands, or permission commands, a helper function is provided, that allows a backend to write its instance by simply listing the set of features it supports.