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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition.Primitives;
using System.Linq;
using Microsoft.Internal;
namespace System.ComponentModel.Composition.Hosting
{
partial class CompositionBatch
{
// Represents a part that exports a single export
private class SingleExportComposablePart : ComposablePart
{
private readonly Export _export;
public SingleExportComposablePart(Export export)
{
Assumes.NotNull(export);
this._export = export;
}
public override IDictionary<string, object> Metadata
{
get { return MetadataServices.EmptyMetadata; }
}
public override IEnumerable<ExportDefinition> ExportDefinitions
{
get { return new ExportDefinition[] { _export.Definition }; }
}
public override IEnumerable<ImportDefinition> ImportDefinitions
{
get { return Enumerable.Empty<ImportDefinition>(); }
}
public override object GetExportedValue(ExportDefinition definition)
{
Requires.NotNull(definition, "definition");
if (definition != _export.Definition)
{
throw ExceptionBuilder.CreateExportDefinitionNotOnThisComposablePart("definition");
}
return _export.Value;
}
public override void SetImport(ImportDefinition definition, IEnumerable<Export> exports)
{
Requires.NotNull(definition, "definition");
Requires.NotNullOrNullElements(exports, "exports");
throw ExceptionBuilder.CreateImportDefinitionNotOnThisComposablePart("definition");
}
}
}
}
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