CompositeChangeToken moved to aspnet/Common Microsoft.Extensions.Primitives

Addresses Common Issue aspnet/Common#163

src/Microsoft.AspNetCore.Mvc.Core/Internal/CompositeChangeToken.cs

@@ -1,85 +0,0 @@
-// Copyright (c) .NET Foundation. All rights reserved.
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-using System;
-using System.Collections.Generic;
-using Microsoft.Extensions.Primitives;
-
-namespace Microsoft.AspNetCore.Mvc.Internal
-{
-    internal class CompositeChangeToken : IChangeToken
-    {
-        public CompositeChangeToken(IList<IChangeToken> changeTokens)
-        {
-            if (changeTokens == null)
-            {
-                throw new ArgumentNullException(nameof(changeTokens));
-            }
-
-            ChangeTokens = changeTokens;
-        }
-
-        public IList<IChangeToken> ChangeTokens { get; }
-
-        public IDisposable RegisterChangeCallback(Action<object> callback, object state)
-        {
-            var disposables = new IDisposable[ChangeTokens.Count];
-            for (var i = 0; i < ChangeTokens.Count; i++)
-            {
-                var disposable = ChangeTokens[i].RegisterChangeCallback(callback, state);
-                disposables[i] = disposable;
-            }
-            return new CompositeDisposable(disposables);
-        }
-
-        public bool HasChanged
-        {
-            get
-            {
-                for (var i = 0; i < ChangeTokens.Count; i++)
-                {
-                    if (ChangeTokens[i].HasChanged)
-                    {
-                        return true;
-                    }
-                }
-
-                return false;
-            }
-        }
-
-        public bool ActiveChangeCallbacks
-        {
-            get
-            {
-                for (var i = 0; i < ChangeTokens.Count; i++)
-                {
-                    if (ChangeTokens[i].ActiveChangeCallbacks)
-                    {
-                        return true;
-                    }
-                }
-
-                return false;
-            }
-        }
-
-        private class CompositeDisposable : IDisposable
-        {
-            private readonly IDisposable[] _disposables;
-
-            public CompositeDisposable(IDisposable[] disposables)
-            {
-                _disposables = disposables;
-            }
-
-            public void Dispose()
-            {
-                for (var i = 0; i < _disposables.Length; i++)
-                {
-                    _disposables[i].Dispose();
-                }
-            }
-        }
-    }
-}