Code cleanup

src/DotNext.MaintenanceServices/Maintenance/ApplicationMaintenanceInterfaceHost.cs

@@ -9,6 +9,7 @@
 namespace DotNext.Maintenance;
 
 using Buffers;
+using Collections.Specialized;
 using Security.Principal;
 using static IO.TextStreamExtensions;
 using static Runtime.InteropServices.UnixDomainSocketInterop;
@@ -236,7 +237,7 @@ protected sealed override async Task ExecuteAsync(CancellationToken token)
         }
     }
 
-    private sealed class MaintenanceSession : Dictionary<string, object>, IMaintenanceSession
+    private sealed class MaintenanceSession : TypeMap, IMaintenanceSession
     {
         private object? identityOrPrincipal;
 
@@ -263,7 +264,7 @@ internal MaintenanceSession(Socket socket, Encoding encoding, BufferWriter<byte>
 
         public TextWriter ResponseWriter { get; }
 
-        IDictionary<string, object> IMaintenanceSession.Context => this;
+        ITypeMap IMaintenanceSession.Context => this;
 
         private void Dispose(bool disposing)
         {

src/DotNext.MaintenanceServices/Maintenance/CommandLine/Authentication/AuthenticationMiddleware.cs

@@ -13,7 +13,7 @@ internal static async Task AuthenticateAsync(this IAuthenticationHandler handler
     {
         var session = (context.Console as IMaintenanceConsole)?.Session;
 
-        if (session?.Principal is { Identity: { IsAuthenticated: true } })
+        if (session?.Principal is { Identity.IsAuthenticated: true })
         {
             // already authenticated
             await next(context).ConfigureAwait(false);
@@ -33,7 +33,7 @@ internal static async Task AuthenticateAsync(this IAuthenticationHandler handler
 
     internal static Task SetDefaultPrincipal(InvocationContext context, Func<InvocationContext, Task> next)
     {
-        if ((context.Console as IMaintenanceConsole)?.Session is { Principal: null } session)
+        if (context.Console is IMaintenanceConsole { Session: { Principal: null } session })
         {
             session.Principal = new GenericPrincipal(session.Identity, roles: null);
         }

src/DotNext.MaintenanceServices/Maintenance/CommandLine/Authorization/AuthorizationCallback.cs

@@ -3,6 +3,8 @@
 
 namespace DotNext.Maintenance.CommandLine.Authorization;
 
+using Collections.Specialized;
+
 /// <summary>
 /// Represents authorization rule.
 /// </summary>
@@ -11,4 +13,4 @@ namespace DotNext.Maintenance.CommandLine.Authorization;
 /// <param name="context">Maintenance session context.</param>
 /// <param name="token">The token that can be used to cancel the operation.</param>
 /// <returns><see langword="true"/> if authorization passed successfully; otherwise, <see langword="false"/>.</returns>
-public delegate ValueTask<bool> AuthorizationCallback(IPrincipal principal, CommandResult target, IDictionary<string, object> context, CancellationToken token);
+public delegate ValueTask<bool> AuthorizationCallback(IPrincipal principal, CommandResult target, ITypeMap context, CancellationToken token);

src/DotNext.MaintenanceServices/Maintenance/IMaintenanceSession.cs

@@ -2,6 +2,8 @@
 
 namespace DotNext.Maintenance;
 
+using Collections.Specialized;
+
 /// <summary>
 /// Represents AMI interaction session.
 /// </summary>
@@ -15,7 +17,7 @@ public interface IMaintenanceSession
     /// <summary>
     /// Gets a context that can be used to exchange information between command executions.
     /// </summary>
-    IDictionary<string, object> Context { get; }
+    ITypeMap Context { get; }
 
     /// <summary>
     /// Gets command response writer.