private static Func <RelationshipManager, RelatedEnd, RelatedEnd> CreateGetRelatedEndMethod <TSource, TTarget>(
AssociationEndMember sourceMember, AssociationEndMember targetMember, NavigationPropertyAccessor sourceAccessor,
NavigationPropertyAccessor targetAccessor)
where TSource : class
where TTarget : class
{
Func <RelationshipManager, RelatedEnd, RelatedEnd> getRelatedEnd;
// Get the appropriate method, either collection or reference depending on the target multiplicity
switch (targetMember.RelationshipMultiplicity)
{
case RelationshipMultiplicity.ZeroOrOne:
case RelationshipMultiplicity.One:
{
getRelatedEnd = (manager, relatedEnd) =>
manager.GetRelatedReference <TSource, TTarget>(
sourceMember,
targetMember,
sourceAccessor,
targetAccessor,
relatedEnd);
break;
}
case RelationshipMultiplicity.Many:
{
getRelatedEnd = (manager, relatedEnd) =>
manager.GetRelatedCollection <TSource, TTarget>(
sourceMember,
targetMember,
sourceAccessor,
targetAccessor,
relatedEnd);
break;
}
default:
var type = typeof(RelationshipMultiplicity);
throw new ArgumentOutOfRangeException(
type.Name,
Strings.ADP_InvalidEnumerationValue(
type.Name, ((int)targetMember.RelationshipMultiplicity).ToString(CultureInfo.InvariantCulture)));
}
return(getRelatedEnd);
}
internal static void CheckArgumentMergeOption(MergeOption mergeOption)
{
switch (mergeOption)
{
case MergeOption.NoTracking:
case MergeOption.AppendOnly:
case MergeOption.OverwriteChanges:
case MergeOption.PreserveChanges:
break;
default:
throw new ArgumentOutOfRangeException(
typeof(MergeOption).Name,
Strings.ADP_InvalidEnumerationValue(
typeof(MergeOption).Name, ((int)mergeOption).ToString(CultureInfo.InvariantCulture)));
}
}
private static Func <RelationshipManager, RelatedEnd, RelatedEnd> CreateGetRelatedEndMethod <TSource, TTarget>(
AssociationEndMember sourceMember,
AssociationEndMember targetMember,
NavigationPropertyAccessor sourceAccessor,
NavigationPropertyAccessor targetAccessor)
where TSource : class
where TTarget : class
{
switch (targetMember.RelationshipMultiplicity)
{
case RelationshipMultiplicity.ZeroOrOne:
case RelationshipMultiplicity.One:
return((Func <RelationshipManager, RelatedEnd, RelatedEnd>)((manager, relatedEnd) => (RelatedEnd)manager.GetRelatedReference <TSource, TTarget>(sourceMember, targetMember, sourceAccessor, targetAccessor, relatedEnd)));
case RelationshipMultiplicity.Many:
return((Func <RelationshipManager, RelatedEnd, RelatedEnd>)((manager, relatedEnd) => (RelatedEnd)manager.GetRelatedCollection <TSource, TTarget>(sourceMember, targetMember, sourceAccessor, targetAccessor, relatedEnd)));
default:
Type type = typeof(RelationshipMultiplicity);
throw new ArgumentOutOfRangeException(type.Name, Strings.ADP_InvalidEnumerationValue((object)type.Name, (object)((int)targetMember.RelationshipMultiplicity).ToString((IFormatProvider)CultureInfo.InvariantCulture)));
}
}