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ApiDescriptionGroupCollectionProvider.cs
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ApiDescriptionGroupCollectionProvider.cs
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// 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.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Mvc.Infrastructure;
namespace Microsoft.AspNetCore.Mvc.ApiExplorer
{
/// <inheritdoc />
public class ApiDescriptionGroupCollectionProvider : IApiDescriptionGroupCollectionProvider
{
private readonly IActionDescriptorCollectionProvider _actionDescriptorCollectionProvider;
private readonly IApiDescriptionProvider[] _apiDescriptionProviders;
private ApiDescriptionGroupCollection _apiDescriptionGroups;
/// <summary>
/// Creates a new instance of <see cref="ApiDescriptionGroupCollectionProvider"/>.
/// </summary>
/// <param name="actionDescriptorCollectionProvider">
/// The <see cref="IActionDescriptorCollectionProvider"/>.
/// </param>
/// <param name="apiDescriptionProviders">
/// The <see cref="IEnumerable{IApiDescriptionProvider}"/>.
/// </param>
public ApiDescriptionGroupCollectionProvider(
IActionDescriptorCollectionProvider actionDescriptorCollectionProvider,
IEnumerable<IApiDescriptionProvider> apiDescriptionProviders)
{
_actionDescriptorCollectionProvider = actionDescriptorCollectionProvider;
_apiDescriptionProviders = apiDescriptionProviders.OrderBy(item => item.Order).ToArray();
}
/// <inheritdoc />
public ApiDescriptionGroupCollection ApiDescriptionGroups
{
get
{
var actionDescriptors = _actionDescriptorCollectionProvider.ActionDescriptors;
if (_apiDescriptionGroups == null || _apiDescriptionGroups.Version != actionDescriptors.Version)
{
_apiDescriptionGroups = GetCollection(actionDescriptors);
}
return _apiDescriptionGroups;
}
}
private ApiDescriptionGroupCollection GetCollection(ActionDescriptorCollection actionDescriptors)
{
var context = new ApiDescriptionProviderContext(actionDescriptors.Items);
foreach (var provider in _apiDescriptionProviders)
{
provider.OnProvidersExecuting(context);
}
for (var i = _apiDescriptionProviders.Length - 1; i >= 0; i--)
{
_apiDescriptionProviders[i].OnProvidersExecuted(context);
}
var groups = context.Results
.GroupBy(d => d.GroupName)
.Select(g => new ApiDescriptionGroup(g.Key, g.ToArray()))
.ToArray();
return new ApiDescriptionGroupCollection(groups, actionDescriptors.Version);
}
}
}