private Export CreateExport(ComposablePartDefinition partDefinition,
ExportDefinition exportDefinition, ImportDefinition importDefinition)
{
CreationPolicy importPolicy = importDefinition.GetRequiredCreationPolicy();
return(CatalogExport.CreateExport(this, partDefinition, exportDefinition, importPolicy));
}
private Export CreateExport(ComposablePartDefinition partDefinition, ExportDefinition exportDefinition, bool isExportFactory, CreationPolicy importPolicy)
{
if (isExportFactory)
{
return(new PartCreatorExport(this,
partDefinition,
exportDefinition));
}
else
{
return(CatalogExport.CreateExport(this,
partDefinition,
exportDefinition,
importPolicy));
}
}
/// <summary>
/// Returns all exports that match the conditions of the specified import.
/// </summary>
/// <param name="definition">The <see cref="ImportDefinition"/> that defines the conditions of the
/// <see cref="Export"/> to get.</param>
/// <returns></returns>
/// <result>
/// An <see cref="IEnumerable{T}"/> of <see cref="Export"/> objects that match
/// the conditions defined by <see cref="ImportDefinition"/>, if found; otherwise, an
/// empty <see cref="IEnumerable{T}"/>.
/// </result>
/// <remarks>
/// <note type="inheritinfo">
/// The implementers should not treat the cardinality-related mismatches as errors, and are not
/// expected to throw exceptions in those cases.
/// For instance, if the import requests exactly one export and the provider has no matching exports or more than one,
/// it should return an empty <see cref="IEnumerable{T}"/> of <see cref="Export"/>.
/// </note>
/// </remarks>
protected override IEnumerable <Export> GetExportsCore(ImportDefinition definition, AtomicComposition atomicComposition)
{
this.ThrowIfDisposed();
this.EnsureRunning();
// Use the version of the catalog appropriate to this atomicComposition
ComposablePartCatalog currentCatalog = atomicComposition.GetValueAllowNull(this._catalog);
#if SILVERLIGHT
IPartCreatorImportDefinition partCreatorDefinition = definition as IPartCreatorImportDefinition;
bool isPartCreator = false;
if (partCreatorDefinition != null)
{
definition = partCreatorDefinition.ProductImportDefinition;
isPartCreator = true;
}
#endif
CreationPolicy importPolicy = definition.GetRequiredCreationPolicy();
List <Export> exports = new List <Export>();
foreach (var partDefinitionAndExportDefinition in currentCatalog.GetExports(definition))
{
if (!IsRejected(partDefinitionAndExportDefinition.Item1, atomicComposition))
{
#if SILVERLIGHT
if (isPartCreator)
{
exports.Add(new PartCreatorExport(this,
partDefinitionAndExportDefinition.Item1,
partDefinitionAndExportDefinition.Item2));
}
else
#endif
{
exports.Add(CatalogExport.CreateExport(this,
partDefinitionAndExportDefinition.Item1,
partDefinitionAndExportDefinition.Item2,
importPolicy));
}
}
}
return(exports);
}