Command Router

It is responsible for instantiating and executing the appropriate ICommand object.

Input Data

For its job, the router needs two types of data:

• available commands
  • also known as Command Metadata Model.
  • a list with information about all the classes that represent a command.
  • obtained using reflection from the assembly provided at setup time.
• command request
  • Also known as Command Request Model.
  • Contains all the data from the user's command line request.

Execution

What the Command Router remains to do is:

1. identify command - Search in the list of available commands for the one specified by the Command Request Model.

2. instantiate command

   • populate command parameters - This is done based on the metadata with values from the text command.

3. execute command

Result

• A ICommand instance which is immediately executed.