private static bool TryGetWithRelationship(
StorageAssociationSetMapping colocatedAssociationSetMap,
EntitySetBase thisExtent,
MemberPath sRootNode,
ref List <SlotInfo> foreignKeySlots,
out WithRelationship withRelationship)
{
DebugCheck.NotNull(foreignKeySlots);
withRelationship = null;
//Get the map for foreign key end
var foreignKeyEndMap = GetForeignKeyEndMapFromAssocitionMap(colocatedAssociationSetMap);
if (foreignKeyEndMap == null ||
foreignKeyEndMap.EndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many)
{
return(false);
}
var toEnd = (AssociationEndMember)foreignKeyEndMap.EndMember;
var fromEnd = MetadataHelper.GetOtherAssociationEnd(toEnd);
var toEndEntityType = (EntityType)((RefType)(toEnd.TypeUsage.EdmType)).ElementType;
var fromEndEntityType = (EntityType)(((RefType)fromEnd.TypeUsage.EdmType).ElementType);
// Get the member path for AssociationSet
var associationSet = (AssociationSet)colocatedAssociationSetMap.Set;
var prefix = new MemberPath(associationSet, toEnd);
// Collect the member paths for edm scalar properties that belong to the target entity key.
// These will be used as part of WITH RELATIONSHIP.
// Get the key properties from edm type since the query parser depends on the order of key members
var propertyMaps = foreignKeyEndMap.Properties.Cast <StorageScalarPropertyMapping>();
var toEndEntityKeyMemberPaths = new List <MemberPath>();
foreach (EdmProperty edmProperty in toEndEntityType.KeyMembers)
{
var scalarPropertyMaps = propertyMaps.Where(propMap => (propMap.EdmProperty.Equals(edmProperty)));
Debug.Assert(scalarPropertyMaps.Count() == 1, "Can't Map the same column multiple times in the same end");
var scalarPropertyMap = scalarPropertyMaps.First();
// Create SlotInfo for Freign Key member that needs to be projected.
var sSlot = new MemberProjectedSlot(new MemberPath(sRootNode, scalarPropertyMap.ColumnProperty));
var endMemberKeyPath = new MemberPath(prefix, edmProperty);
toEndEntityKeyMemberPaths.Add(endMemberKeyPath);
foreignKeySlots.Add(new SlotInfo(true, true, sSlot, endMemberKeyPath));
}
// Parent assignable from child: Ensures they are in the same hierarchy.
if (thisExtent.ElementType.IsAssignableFrom(fromEndEntityType))
{
// Now create the WITH RELATIONSHIP with all the needed info.
withRelationship = new WithRelationship(
associationSet, fromEnd, fromEndEntityType, toEnd, toEndEntityType, toEndEntityKeyMemberPaths);
return(true);
}
else
{
return(false);
}
}
private static bool TryGetWithRelationship(
AssociationSetMapping colocatedAssociationSetMap,
EntitySetBase thisExtent,
MemberPath sRootNode,
ref List <SlotInfo> foreignKeySlots,
out WithRelationship withRelationship)
{
withRelationship = (WithRelationship)null;
EndPropertyMapping fromAssocitionMap = LeafCellTreeNode.GetForeignKeyEndMapFromAssocitionMap(colocatedAssociationSetMap);
if (fromAssocitionMap == null || fromAssocitionMap.AssociationEnd.RelationshipMultiplicity == RelationshipMultiplicity.Many)
{
return(false);
}
AssociationEndMember associationEnd = fromAssocitionMap.AssociationEnd;
AssociationEndMember otherAssociationEnd = MetadataHelper.GetOtherAssociationEnd(associationEnd);
EntityType elementType1 = (EntityType)((RefType)associationEnd.TypeUsage.EdmType).ElementType;
EntityType elementType2 = (EntityType)((RefType)otherAssociationEnd.TypeUsage.EdmType).ElementType;
AssociationSet set = (AssociationSet)colocatedAssociationSetMap.Set;
MemberPath prefix = new MemberPath((EntitySetBase)set, (EdmMember)associationEnd);
IEnumerable <ScalarPropertyMapping> source = fromAssocitionMap.PropertyMappings.Cast <ScalarPropertyMapping>();
List <MemberPath> memberPathList = new List <MemberPath>();
foreach (EdmProperty keyMember in elementType1.KeyMembers)
{
EdmProperty edmProperty = keyMember;
ScalarPropertyMapping scalarPropertyMapping = source.Where <ScalarPropertyMapping>((Func <ScalarPropertyMapping, bool>)(propMap => propMap.Property.Equals((object)edmProperty))).First <ScalarPropertyMapping>();
MemberProjectedSlot memberProjectedSlot = new MemberProjectedSlot(new MemberPath(sRootNode, (EdmMember)scalarPropertyMapping.Column));
MemberPath outputMember = new MemberPath(prefix, (EdmMember)edmProperty);
memberPathList.Add(outputMember);
foreignKeySlots.Add(new SlotInfo(true, true, (ProjectedSlot)memberProjectedSlot, outputMember));
}
if (!thisExtent.ElementType.IsAssignableFrom((EdmType)elementType2))
{
return(false);
}
withRelationship = new WithRelationship(set, otherAssociationEnd, elementType2, associationEnd, elementType1, (IEnumerable <MemberPath>)memberPathList);
return(true);
}
