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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.PooledObjects;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.Shared.Extensions;
internal static class ILanguageMetadataExtensions
{
public static TInterface? ToSpecificLanguage<TInterface, TMetadata>(this IEnumerable<Lazy<TInterface, TMetadata>> services, string languageName)
where TMetadata : ILanguageMetadata
{
return services.Where(s => s.Metadata.Language == languageName).Select(s => s.Value).FirstOrDefault();
}
public static IEnumerable<TInterface> FilterToSpecificLanguage<TInterface, TMetadata>(this IEnumerable<Lazy<TInterface, TMetadata>> services, string languageName)
where TMetadata : ILanguageMetadata
{
return services.Where(s => s.Metadata.Language == languageName).Select(s => s.Value);
}
public static ImmutableDictionary<string, ImmutableArray<Lazy<TInterface, TMetadata>>> ToPerLanguageMap<TInterface, TMetadata>(this IEnumerable<Lazy<TInterface, TMetadata>> services)
where TMetadata : ILanguageMetadata
{
var builder = ImmutableDictionary.CreateBuilder<string, ArrayBuilder<Lazy<TInterface, TMetadata>>>();
foreach (var service in services)
{
var language = service.Metadata?.Language ?? string.Empty;
var list = builder.GetOrAdd(language, _ => ArrayBuilder<Lazy<TInterface, TMetadata>>.GetInstance());
list.Add(service);
}
return builder.Select(kvp => KeyValuePairUtil.Create(kvp.Key, kvp.Value.ToImmutableAndFree())).ToImmutableDictionary();
}
public static ImmutableDictionary<string, ImmutableArray<Lazy<TInterface, TMetadata>>> ToPerLanguageMapWithMultipleLanguages<TInterface, TMetadata>(this IEnumerable<Lazy<TInterface, TMetadata>> services)
where TMetadata : ILanguagesMetadata
{
using var _ = PooledDictionary<string, ArrayBuilder<Lazy<TInterface, TMetadata>>>.GetInstance(out var map);
foreach (var service in services)
{
foreach (var language in service.Metadata.Languages.Distinct())
{
if (!string.IsNullOrEmpty(language))
{
var list = map.GetOrAdd(language, _ => ArrayBuilder<Lazy<TInterface, TMetadata>>.GetInstance());
list.Add(service);
}
}
}
return map.ToImmutableDictionary(kvp => kvp.Key, kvp => kvp.Value.ToImmutableAndFree());
}
}
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