private static ExportCardinalityCheckResult MatchCardinality(EnumerableCardinality actualCardinality, ImportCardinality importCardinality)
{
switch (actualCardinality)
{
case EnumerableCardinality.Zero:
if (importCardinality == ImportCardinality.ExactlyOne)
{
return(ExportCardinalityCheckResult.NoExports);
}
break;
case EnumerableCardinality.TwoOrMore:
if (importCardinality.IsAtMostOne())
{
return(ExportCardinalityCheckResult.TooManyExports);
}
break;
default:
if (actualCardinality != EnumerableCardinality.One)
{
throw new Exception(SR.Diagnostic_InternalExceptionMessage);
}
break;
}
return(ExportCardinalityCheckResult.Match);
}
private static ExportCardinalityCheckResult MatchCardinality(EnumerableCardinality actualCardinality, ImportCardinality importCardinality)
{
switch (actualCardinality)
{
case EnumerableCardinality.Zero:
if (importCardinality == ImportCardinality.ExactlyOne)
{
return(ExportCardinalityCheckResult.NoExports);
}
break;
case EnumerableCardinality.TwoOrMore:
if (importCardinality.IsAtMostOne())
{
return(ExportCardinalityCheckResult.TooManyExports);
}
break;
default:
Assumes.IsTrue(actualCardinality == EnumerableCardinality.One);
break;
}
return(ExportCardinalityCheckResult.Match);
}
internal static ExportCardinalityCheckResult CheckCardinality(ImportDefinition definition, IEnumerable <Export> exports)
{
EnumerableCardinality actualCardinality = exports.GetCardinality();
switch (actualCardinality)
{
case EnumerableCardinality.Zero:
if (definition.Cardinality == ImportCardinality.ExactlyOne)
{
return(ExportCardinalityCheckResult.NoExports);
}
break;
case EnumerableCardinality.TwoOrMore:
if (definition.Cardinality.IsAtMostOne())
{
return(ExportCardinalityCheckResult.TooManyExports);
}
break;
default:
Assumes.IsTrue(actualCardinality == EnumerableCardinality.One);
break;
}
return(ExportCardinalityCheckResult.Match);
}
internal static ExportCardinalityCheckResult CheckCardinality <T>(ImportDefinition definition, IEnumerable <T>?enumerable)
{
EnumerableCardinality actualCardinality = (enumerable != null) ? enumerable.GetCardinality() : EnumerableCardinality.Zero;
return(MatchCardinality(actualCardinality, definition.Cardinality));
}
