internal static bool DoesEndKeySubsumeAssociationSetKey(
AssociationSet assocSet,
AssociationEndMember thisEnd,
HashSet <Pair <EdmMember, EntityType> > associationkeys)
{
AssociationType elementType1 = assocSet.ElementType;
EntityType thisEndsEntityType = (EntityType)((RefType)thisEnd.TypeUsage.EdmType).ElementType;
HashSet <Pair <EdmMember, EntityType> > pairSet = new HashSet <Pair <EdmMember, EntityType> >(thisEndsEntityType.KeyMembers.Select <EdmMember, Pair <EdmMember, EntityType> >((Func <EdmMember, Pair <EdmMember, EntityType> >)(edmMember => new Pair <EdmMember, EntityType>(edmMember, thisEndsEntityType))));
foreach (ReferentialConstraint referentialConstraint in elementType1.ReferentialConstraints)
{
IEnumerable <EdmMember> edmMembers;
EntityType elementType2;
if (thisEnd.Equals((object)referentialConstraint.ToRole))
{
edmMembers = Helpers.AsSuperTypeList <EdmProperty, EdmMember>((IEnumerable <EdmProperty>)referentialConstraint.FromProperties);
elementType2 = (EntityType)((RefType)referentialConstraint.FromRole.TypeUsage.EdmType).ElementType;
}
else if (thisEnd.Equals((object)referentialConstraint.FromRole))
{
edmMembers = Helpers.AsSuperTypeList <EdmProperty, EdmMember>((IEnumerable <EdmProperty>)referentialConstraint.ToProperties);
elementType2 = (EntityType)((RefType)referentialConstraint.ToRole.TypeUsage.EdmType).ElementType;
}
else
{
continue;
}
foreach (EdmMember first in edmMembers)
{
associationkeys.Remove(new Pair <EdmMember, EntityType>(first, elementType2));
}
}
return(associationkeys.IsSubsetOf((IEnumerable <Pair <EdmMember, EntityType> >)pairSet));
}
internal static bool DoesEndKeySubsumeAssociationSetKey(
AssociationSet assocSet, AssociationEndMember thisEnd, HashSet <Pair <EdmMember, EntityType> > associationkeys)
{
var assocType = assocSet.ElementType;
var thisEndsEntityType = (EntityType)((RefType)thisEnd.TypeUsage.EdmType).ElementType;
var thisEndKeys = new HashSet <Pair <EdmMember, EntityType> >(
thisEndsEntityType.KeyMembers.Select(edmMember => new Pair <EdmMember, EntityType>(edmMember, thisEndsEntityType)));
foreach (var constraint in assocType.ReferentialConstraints)
{
IEnumerable <EdmMember> otherEndProperties;
EntityType otherEndType;
if (thisEnd.Equals(constraint.ToRole))
{
otherEndProperties = Helpers.AsSuperTypeList <EdmProperty, EdmMember>(constraint.FromProperties);
otherEndType = (EntityType)((RefType)(constraint.FromRole).TypeUsage.EdmType).ElementType;
}
else if (thisEnd.Equals(constraint.FromRole))
{
otherEndProperties = Helpers.AsSuperTypeList <EdmProperty, EdmMember>(constraint.ToProperties);
otherEndType = (EntityType)((RefType)(constraint.ToRole).TypeUsage.EdmType).ElementType;
}
else
{
//this end not part of the referential constraint
continue;
}
//Essentially ref constraints is an equality condition, so remove redundant members from entity set key
foreach (var member in otherEndProperties)
{
associationkeys.Remove(new Pair <EdmMember, EntityType>(member, otherEndType));
}
}
//Now that all redundant members have been removed, is thisEnd the key of the entity set?
return(associationkeys.IsSubsetOf(thisEndKeys));
}
// effects: Returns true iff every end other than "endPropery" has a lower
// multiplicity of at least one
internal static bool IsEveryOtherEndAtLeastOne(AssociationSet associationSet,
AssociationEndMember member)
{
foreach (AssociationSetEnd end in associationSet.AssociationSetEnds)
{
AssociationEndMember endMember = end.CorrespondingAssociationEndMember;
if (endMember.Equals(member) == false &&
GetLowerBoundOfMultiplicity(endMember.RelationshipMultiplicity) == 0)
{
return(false);
}
}
return(true);
}
internal static bool IsEveryOtherEndAtLeastOne(
AssociationSet associationSet,
AssociationEndMember member)
{
foreach (AssociationSetEnd associationSetEnd in associationSet.AssociationSetEnds)
{
AssociationEndMember associationEndMember = associationSetEnd.CorrespondingAssociationEndMember;
if (!associationEndMember.Equals((object)member) && MetadataHelper.GetLowerBoundOfMultiplicity(associationEndMember.RelationshipMultiplicity) == 0)
{
return(false);
}
}
return(true);
}
