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path: root/src/SMAPI/IAssetData.cs
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using System;

namespace StardewModdingAPI
{
    /// <summary>Generic metadata and methods for a content asset being loaded.</summary>
    /// <typeparam name="TValue">The expected data type.</typeparam>
    public interface IAssetData<TValue> : IAssetInfo
    {
        /*********
        ** Accessors
        *********/
        /// <summary>The content data being read.</summary>
        TValue Data { get; }


        /*********
        ** Public methods
        *********/
        /// <summary>Replace the entire content value with the given value. This is generally not recommended, since it may break compatibility with other mods or different versions of the game.</summary>
        /// <param name="value">The new content value.</param>
        /// <exception cref="ArgumentNullException">The <paramref name="value"/> is null.</exception>
        /// <exception cref="InvalidCastException">The <paramref name="value"/>'s type is not compatible with the loaded asset's type.</exception>
        void ReplaceWith(TValue value);
    }

    /// <summary>Generic metadata and methods for a content asset being loaded.</summary>
    public interface IAssetData : IAssetData<object>
    {
        /*********
        ** Public methods
        *********/
        /// <summary>Get a helper to manipulate the data as a dictionary.</summary>
        /// <typeparam name="TKey">The expected dictionary key.</typeparam>
        /// <typeparam name="TValue">The expected dictionary value.</typeparam>
        /// <exception cref="InvalidOperationException">The content being read isn't a dictionary.</exception>
        IAssetDataForDictionary<TKey, TValue> AsDictionary<TKey, TValue>();

        /// <summary>Get a helper to manipulate the data as an image.</summary>
        /// <exception cref="InvalidOperationException">The content being read isn't an image.</exception>
        IAssetDataForImage AsImage();

        /// <summary>Get a helper to manipulate the data as a map.</summary>
        /// <exception cref="InvalidOperationException">The content being read isn't a map.</exception>
        IAssetDataForMap AsMap();

        /// <summary>Get the data as a given type.</summary>
        /// <typeparam name="TData">The expected data type.</typeparam>
        /// <exception cref="InvalidCastException">The data can't be converted to <typeparamref name="TData"/>.</exception>
        TData GetData<TData>();
    }
}