// 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.

#nullable disable

using System;
using System.Composition;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Host.Mef;

namespace Microsoft.CodeAnalysis.Navigation;

[ExportWorkspaceServiceFactory(typeof(ISymbolNavigationService), ServiceLayer.Default), Shared]
internal sealed class DefaultSymbolNavigationServiceFactory : IWorkspaceServiceFactory
{
    private ISymbolNavigationService _singleton;

    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public DefaultSymbolNavigationServiceFactory()
    {
    }

    public IWorkspaceService CreateService(HostWorkspaceServices workspaceServices)
    {
        _singleton ??= new DefaultSymbolNavigationService();

        return _singleton;
    }
}