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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;

namespace Cake.Core

{

/// <summary>

/// Implementation of <see cref="ICakeDataService"/>.

/// </summary>

// ReSharper disable once ClassNeverInstantiated.Global

public sealed class CakeDataService : ICakeDataService

{

private readonly Dictionary<Type, object> _data;

/// <summary>

/// Initializes a new instance of the <see cref="CakeDataService"/> class.

/// </summary>

public CakeDataService()

{

_data = new Dictionary<Type, object>();

}

/// <inheritdoc/>

public TData Get<TData>()

where TData : class

{

if (_data.TryGetValue(typeof(TData), out var data))

{

if (data is TData typedData)

{

return typedData;

}

var message = $"Context data exists but is of the wrong type ({data.GetType().FullName}).";

throw new InvalidOperationException(message);

}

throw new InvalidOperationException("The context data has not been setup.");

}

/// <inheritdoc/>

public void Add<TData>(TData value)

where TData : class

{

if (_data.ContainsKey(typeof(TData)))

{

var message = $"Context data of type '{typeof(TData).FullName}' has already been registered.";

throw new InvalidOperationException(message);

}

_data.Add(typeof(TData), value);

}

}

}