/// <summary>
/// Initializes a new instance of the <see cref="CommandHandler{TCommand}" /> class.
/// </summary>
/// <param name="mediator">
/// A processing intermediary that is used to process sub-commands.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="mediator" /> is <see langword="null" />.
/// </exception>
protected CommandHandler(ICommandMediator mediator)
: base()
{
Mediator = mediator.RejectIf().IsNull(nameof(mediator)).TargetArgument;
}
/// <summary>
/// Initializes a new instance of the <see cref="ApplicationController" /> class.
/// </summary>
/// <param name="applicationConfiguration">
/// Configuration information for the application.
/// </param>
/// <param name="mediator">
/// A processing intermediary for commands issued by the controller.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="applicationConfiguration" /> is <see langword="null" /> -or- <paramref name="mediator" /> is
/// <see langword="null" />.
/// </exception>
protected ApplicationController(IConfiguration applicationConfiguration, ICommandMediator mediator)
{
ApplicationConfiguration = applicationConfiguration.RejectIf().IsNull(nameof(applicationConfiguration)).TargetArgument;
Mediator = mediator.RejectIf().IsNull(nameof(mediator)).TargetArgument;
}