internal static T CastExportedValue <T>(ICompositionElement element, object?exportedValue)
{
bool succeeded = ContractServices.TryCast(typeof(T), exportedValue, out object?typedExportedValue);
if (!succeeded)
{
throw new CompositionContractMismatchException(SR.Format(
SR.ContractMismatch_ExportedValueCannotBeCastToT,
element.DisplayName,
typeof(T)));
}
return((T)typedExportedValue !);
}
internal static T CastExportedValue <T>(ICompositionElement element, object exportedValue)
{
object typedExportedValue = null;
bool succeeded = ContractServices.TryCast(typeof(T), exportedValue, out typedExportedValue);
if (!succeeded)
{
throw new CompositionContractMismatchException(string.Format(CultureInfo.CurrentCulture,
SR.ContractMismatch_ExportedValueCannotBeCastToT,
element.DisplayName,
typeof(T)));
}
return((T)typedExportedValue);
}
private object?Cast(Type type, Export export)
{
object?value = export.Value;
if (!ContractServices.TryCast(type, value, out object?result))
{
throw new ComposablePartException(
SR.Format(
SR.ReflectionModel_ImportNotAssignableFromExport,
export.ToElement().DisplayName,
type.FullName),
Definition.ToElement());
}
return(result);
}
internal static T GetExportedValueFromLazy <T>(Export export)
{
object exportedValue = export.Value;
object typedExportedValue = null;
bool succeeded = ContractServices.TryCast(typeof(T), exportedValue, out typedExportedValue);
if (!succeeded)
{
throw new CompositionContractMismatchException(string.Format(CultureInfo.CurrentCulture,
Strings.ContractMismatch_ExportedValueCannotBeCastToT,
export.ToElement().DisplayName,
typeof(T)));
}
return((T)typedExportedValue);
}
private object Cast(Type type, Export export)
{
// TODO: Need to catch CompositionException to provide
// additional information about what member we're setting
// and the current dependency graph.
object value = export.Value;
object result;
if (!ContractServices.TryCast(type, value, out result))
{
throw new ComposablePartException(
String.Format(CultureInfo.CurrentCulture,
Strings.ReflectionModel_ImportNotAssignableFromExport,
export.ToElement().DisplayName,
type.FullName),
this.Definition.ToElement());
}
return(result);
}