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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.
using System.Collections.Generic;
namespace System.Composition.Hosting.Core
{
/// <summary>
/// Describes an export of a part known to the composition engine. This is the only runtime
/// overhead that is maintained per-part; all other part-specific information must be discarded once
/// its export descriptors have been retrieved.
/// </summary>
public abstract class ExportDescriptor
{
/// <summary>
/// The activator used to retrieve instances of the export.
/// </summary>
public abstract CompositeActivator Activator { get; }
/// <summary>
/// The Export Metadata associated with the export.
/// </summary>
public abstract IDictionary<string, object> Metadata { get; }
/// <summary>
/// Construct an <see cref="ExportDescriptor"/>.
/// </summary>
/// <param name="activator">The activator used to retrieve instances of the export.</param>
/// <param name="metadata">The Export Metadata associated with the export.</param>
/// <returns>The export descriptor.</returns>
public static ExportDescriptor Create(CompositeActivator activator, IDictionary<string, object> metadata)
{
return new DirectExportDescriptor(activator, metadata);
}
}
}
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