110 lines
3.4 KiB
C#
110 lines
3.4 KiB
C#
// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
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using System;
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using System.Runtime.CompilerServices;
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namespace FlaxEngine
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{
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/// <summary>
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/// Json asset reference utility. References resource with a typed data type.
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/// </summary>
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/// <typeparam name="T">Type of the asset instance type.</typeparam>
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#if FLAX_EDITOR
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[CustomEditor(typeof(FlaxEditor.CustomEditors.Editors.AssetRefEditor))]
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#endif
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public struct JsonAssetReference<T>
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{
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/// <summary>
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/// Gets or sets the referenced asset.
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/// </summary>
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public JsonAsset Asset;
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/// <summary>
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/// Gets the instance of the serialized object from the json asset data. Cached internally.
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/// </summary>
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public T Instance => (T)Asset?.Instance;
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/// <summary>
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/// Initializes a new instance of the <see cref="JsonAssetReference{T}"/> structure.
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/// </summary>
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/// <param name="asset">The Json Asset.</param>
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public JsonAssetReference(JsonAsset asset)
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{
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Asset = asset;
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}
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/// <summary>
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/// Implicit cast operator.
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/// </summary>
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public static implicit operator JsonAsset(JsonAssetReference<T> value)
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{
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return value.Asset;
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}
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/// <summary>
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/// Implicit cast operator.
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/// </summary>
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public static implicit operator IntPtr(JsonAssetReference<T> value)
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{
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return Object.GetUnmanagedPtr(value.Asset);
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}
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/// <summary>
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/// Implicit cast operator.
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/// </summary>
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public static implicit operator JsonAssetReference<T>(JsonAsset value)
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{
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return new JsonAssetReference<T>(value);
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}
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/// <summary>
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/// Implicit cast operator.
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/// </summary>
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public static implicit operator JsonAssetReference<T>(IntPtr valuePtr)
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{
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return new JsonAssetReference<T>(Object.FromUnmanagedPtr(valuePtr) as JsonAsset);
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}
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/// <summary>
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/// Checks if the object exists (reference is not null and the unmanaged object pointer is valid).
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/// </summary>
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/// <param name="obj">The object to check.</param>
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/// <returns>True if object is valid, otherwise false.</returns>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static implicit operator bool(JsonAssetReference<T> obj)
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{
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return obj.Asset;
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}
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/// <summary>
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/// Checks whether the two objects are equal.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool operator ==(JsonAssetReference<T> left, JsonAssetReference<T> right)
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{
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return left.Asset == right.Asset;
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}
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/// <summary>
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/// Checks whether the two objects are not equal.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool operator !=(JsonAssetReference<T> left, JsonAssetReference<T> right)
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{
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return left.Asset != right.Asset;
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}
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/// <inheritdoc />
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public override string ToString()
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{
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return Asset?.ToString();
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}
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/// <inheritdoc />
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public override int GetHashCode()
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{
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return Asset?.GetHashCode() ?? 0;
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}
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}
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}
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