internal static EntityDataSourceReferenceGroup Create(Type entityType, AssociationSetEnd end)
{
EntityDataSourceUtil.CheckArgumentNull(entityType, "entityType");
Type groupType = typeof(EntityDataSourceReferenceGroup<>).MakeGenericType(entityType);
return (EntityDataSourceReferenceGroup)Activator.CreateInstance(groupType, new object[] { end });
}
private void GetFromAssociationSetEnd(AssociationSet definingSet, AssociationSet multiplicitySet, out AssociationSetEnd associationSetEnd, out RelationshipMultiplicity multiplicity, out OperationAction deleteBehavior)
{
// for a situation like this (CD is CascadeDelete)
//
// -------- CD -------- CD --------
// | A |1 <- 1| AtoB |* <- 1| B |
// | |-------| |-------| |
// | | | | | |
// -------- -------- --------
//
// You get
// -------- CD --------
// | A |* <- 1| B |
// | |-------| |
// | | | |
// -------- --------
//
// Notice that the of the new "link table association" muliplicities are opposite of what comming into the original link table
// this seems counter intuitive at first, but makes sense when you think all the way through it
//
// CascadeDelete Behavior (we can assume the runtime will always delete cascade
// to the link table from the outside tables (it actually doesn't, but that is a
associationSetEnd = GetAssociationSetEnd(definingSet, true);
AssociationSetEnd multiplicityAssociationSetEnd = GetAssociationSetEnd(multiplicitySet, false);
multiplicity = multiplicityAssociationSetEnd.CorrespondingAssociationEndMember.RelationshipMultiplicity;
deleteBehavior = OperationAction.None;
if (multiplicity != RelationshipMultiplicity.Many)
{
OperationAction otherEndBehavior = GetAssociationSetEnd(definingSet, false).CorrespondingAssociationEndMember.DeleteBehavior;
if(otherEndBehavior == OperationAction.None)
{
// Since the other end does not have an operation
// that means that only one end could possibly have an operation, that is good
// so set it the operation
deleteBehavior = multiplicityAssociationSetEnd.CorrespondingAssociationEndMember.DeleteBehavior;
}
}
}
private static DbRelatedEntityRef RelatedEntityRefFromAssociationSetEnd(EntityType constructedEntityType, DbNewInstanceExpression entityConstructor, AssociationSetEnd principalSetEnd, ReferentialConstraint fkConstraint)
{
EntityType principalEntityType = (EntityType)TypeHelpers.GetEdmType<RefType>(fkConstraint.FromRole.TypeUsage).ElementType;
IList<DbExpression> principalKeyValues = null;
// Create Entity Property/DbExpression value pairs from the entity constructor DbExpression,
// then join these with the principal/dependent property pairs from the FK constraint
// to produce principal property name/DbExpression value pairs from which to create the principal ref.
//
// Ideally the code would be as below, but anonymous types break asmmeta:
//var keyPropAndValue =
// from pv in constructedEntityType.Properties.Select((p, idx) => new { DependentProperty = p, Value = entityConstructor.Arguments[idx] })
// join ft in fkConstraint.FromProperties.Select((fp, idx) => new { PrincipalProperty = fp, DependentProperty = fkConstraint.ToProperties[idx] })
// on pv.DependentProperty equals ft.DependentProperty
// select new { PrincipalProperty = ft.PrincipalProperty.Name, Value = pv.Value };
//
var keyPropAndValue =
from pv in constructedEntityType.Properties.Select((p, idx) => Tuple.Create(p, entityConstructor.Arguments[idx])) // new { DependentProperty = p, Value = entityConstructor.Arguments[idx] })
join ft in fkConstraint.FromProperties.Select((fp, idx) => Tuple.Create(fp, fkConstraint.ToProperties[idx])) //new { PrincipalProperty = fp, DependentProperty = fkConstraint.ToProperties[idx] })
on pv.Item1 equals ft.Item2 //pv.DependentProperty equals ft.DependentProperty
select Tuple.Create(ft.Item1.Name, pv.Item2); // new { PrincipalProperty = ft.PrincipalProperty.Name, Value = pv.Value };
// If there is only a single property in the principal's key, then there is no ordering concern.
// Otherwise, create a dictionary of principal key property name to DbExpression value so that
// when used as the arguments to the ref expression, the dependent property values - used here
// as principal key property values - are in the correct order, which is the same order as the
// key members themselves.
//
if (fkConstraint.FromProperties.Count == 1)
{
var singleKeyNameAndValue = keyPropAndValue.Single();
Debug.Assert(singleKeyNameAndValue.Item1 == fkConstraint.FromProperties[0].Name, "Unexpected single key property name");
principalKeyValues = new[] { singleKeyNameAndValue.Item2 };
}
else
{
var keyValueMap = keyPropAndValue.ToDictionary(pav => pav.Item1, pav => pav.Item2, StringComparer.Ordinal);
principalKeyValues = principalEntityType.KeyMemberNames.Select(memberName => keyValueMap[memberName]).ToList();
}
// Create the ref to the principal entity based on the (now correctly ordered) key value expressions.
//
DbRefExpression principalRef = principalSetEnd.EntitySet.CreateRef(principalEntityType, principalKeyValues);
DbRelatedEntityRef result = DbExpressionBuilder.CreateRelatedEntityRef(fkConstraint.ToRole, fkConstraint.FromRole, principalRef);
return result;
}
/// <summary>
/// Adds the given end to the collection of ends
/// </summary>
/// <param name="associationSetEnd"></param>
internal void AddAssociationSetEnd(AssociationSetEnd associationSetEnd)
{
this.AssociationSetEnds.Source.Add(associationSetEnd);
}
private AssociationSetEnd CreateModelAssociationSetEnd(LoadMethodSessionState session, AssociationSetEnd storeEnd, AssociationSet parentModelAssociationSet)
{
AssociationEndMember associationEnd = session.MappingLookups.StoreAssociationEndMemberToModelAssociationEndMember[storeEnd.CorrespondingAssociationEndMember];
EntitySet entitySet = session.MappingLookups.StoreEntitySetToModelEntitySet[storeEnd.EntitySet];
string role = associationEnd.Name;
AssociationSetEnd end = new AssociationSetEnd(entitySet, parentModelAssociationSet, associationEnd);
return end;
}
private AssociationSet CreateModelAssociationSet(LoadMethodSessionState session, OneToOneMappingSerializer.CollapsedEntityAssociationSet collapsedAssociationSet)
{
// create the association
string associationName = CreateModelName(collapsedAssociationSet.EntitySet.Name, session.UsedGlobalModelTypeNames);
AssociationType association = new AssociationType(associationName,
_namespaceName, false, DataSpace.CSpace);
// create the association set
string associationSetName = CreateModelName(collapsedAssociationSet.EntitySet.Name, session.UsedEntityContainerItemNames);
AssociationSet set = new AssociationSet(associationSetName, association);
// create the association and association set end members
UniqueIdentifierService usedEndMemberNames = new UniqueIdentifierService(false);
for(int i = 0; i < collapsedAssociationSet.AssociationSets.Count; i++)
{
AssociationSetEnd storeEnd;
RelationshipMultiplicity multiplicity;
OperationAction deleteBehavior;
collapsedAssociationSet.GetStoreAssociationSetEnd(i, out storeEnd, out multiplicity, out deleteBehavior);
AssociationEndMember end = CreateAssociationEndMember(session, storeEnd.CorrespondingAssociationEndMember, usedEndMemberNames, multiplicity, deleteBehavior);
association.AddMember(end);
EntitySet entitySet = session.MappingLookups.StoreEntitySetToModelEntitySet[storeEnd.EntitySet];
AssociationSetEnd setEnd = new AssociationSetEnd(entitySet, set, end);
set.AddAssociationSetEnd(setEnd);
session.MappingLookups.StoreAssociationSetEndToModelAssociationSetEnd.Add(storeEnd, setEnd);
}
// don't need a referential constraint
CreateModelNavigationProperties(session, association);
collapsedAssociationSet.ModelAssociationSet = set;
return set;
}
/// <summary>
/// Converts an association set from SOM to metadata
/// </summary>
/// <param name="relationshipSet">The SOM element to process</param>
/// <param name="providerManifest">The provider manifest to be used for conversion</param>
/// <param name="convertedItemCache">The item collection for currently existing metadata objects</param>
/// <param name="newGlobalItems">The new GlobalItem objects that are created as a result of this conversion</param>
/// <param name="container"></param>
/// <returns>The association set object resulting from the convert</returns>
private static AssociationSet ConvertToAssociationSet(Som.EntityContainerRelationshipSet relationshipSet,
DbProviderManifest providerManifest,
ConversionCache convertedItemCache,
EntityContainer container,
Dictionary<Som.SchemaElement, GlobalItem> newGlobalItems)
{
Debug.Assert(relationshipSet.Relationship.RelationshipKind == RelationshipKind.Association);
AssociationType associationType = (AssociationType)LoadSchemaElement((Som.SchemaType)relationshipSet.Relationship,
providerManifest,
convertedItemCache,
newGlobalItems);
AssociationSet associationSet = new AssociationSet(relationshipSet.Name, associationType);
foreach (Som.EntityContainerRelationshipSetEnd end in relationshipSet.Ends)
{
//-- need the EntityType for the end
EntityType endEntityType = (EntityType)LoadSchemaElement(end.EntitySet.EntityType,
providerManifest,
convertedItemCache,
newGlobalItems);
//-- need to get the end member
AssociationEndMember endMember = (AssociationEndMember)associationType.Members[end.Name];
//-- create the end
AssociationSetEnd associationSetEnd = new AssociationSetEnd(GetEntitySet(end.EntitySet, container),
associationSet,
endMember);
AddOtherContent(end, associationSetEnd);
associationSet.AddAssociationSetEnd(associationSetEnd);
// Extract optional Documentation from the end element
if (end.Documentation != null)
{
associationSetEnd.Documentation = ConvertToDocumentation(end.Documentation);
}
}
// Extract the optional Documentation
if (relationshipSet.Documentation != null)
{
associationSet.Documentation = ConvertToDocumentation(relationshipSet.Documentation);
}
AddOtherContent(relationshipSet, associationSet);
return associationSet;
}
public void GetStoreAssociationSetEnd(int index, out AssociationSetEnd storeAssociationSetEnd, out RelationshipMultiplicity multiplicity, out OperationAction deleteBehavior)
{
Debug.Assert(index >= 0 && index < AssociationSets.Count, "out of bounds dude!!");
Debug.Assert(AssociationSets.Count == 2, "This code depends on only having exactly two AssociationSets");
GetFromAssociationSetEnd(AssociationSets[index], AssociationSets[(index+1)%2], out storeAssociationSetEnd, out multiplicity, out deleteBehavior);
}
private static EdmProperty GetAssociatedFkColumn(AssociationSetEnd store, EdmProperty storeKeyProperty)
{
ReferentialConstraint constraint = GetReferentialConstraint(store.ParentAssociationSet);
if (store.Name == constraint.FromRole.Name)
{
for (int i = 0; i < constraint.FromProperties.Count; i++)
{
if (constraint.FromProperties[i] == storeKeyProperty)
{
// return the matching Fk column
return constraint.ToProperties[i];
}
}
}
return storeKeyProperty;
}
private void WriteEndPropertyElement(XmlWriter writer, AssociationSetEnd store, AssociationSetEnd model)
{
writer.WriteStartElement(StorageMslConstructs.EndPropertyMappingElement, _xmlNamespace);
writer.WriteAttributeString(StorageMslConstructs.EndPropertyMappingNameAttribute, model.Name);
foreach (EdmProperty storeKeyMember in store.EntitySet.ElementType.KeyMembers)
{
EdmProperty modelKeyMember = _lookups.StoreEdmPropertyToModelEdmProperty[storeKeyMember];
EdmProperty storeFkTableMember = GetAssociatedFkColumn(store, storeKeyMember);
WriteScalarPropertyElement(writer, storeFkTableMember, modelKeyMember);
}
writer.WriteEndElement();
}
protected EntityDataSourceReferenceGroup(AssociationSetEnd end)
{
EntityDataSourceUtil.CheckArgumentNull(end, "end");
this.end = end;
}
/// <summary>
/// Adds the given end to the collection of ends
/// </summary>
/// <param name="associationSetEnd"></param>
internal void AddAssociationSetEnd(AssociationSetEnd associationSetEnd)
{
this.AssociationSetEnds.Source.Add(associationSetEnd);
}
protected override void Visit(AssociationSetEnd associationSetEnd)
{
int index;
if (!this.AddObjectToSeenListAndHashBuilder(associationSetEnd, out index))
{
return;
}
this.AddObjectStartDumpToHashBuilder(associationSetEnd, index);
#region Inner data visit
this.AddObjectContentToHashBuilder(associationSetEnd.Identity);
// Name is covered by Identity
base.Visit(associationSetEnd);
#endregion
this.AddObjectEndDumpToHashBuilder();
}
protected virtual void Visit(AssociationSetEnd associationSetEnd)
{
Visit(associationSetEnd.CorrespondingAssociationEndMember);
Visit(associationSetEnd.EntitySet);
Visit(associationSetEnd.ParentAssociationSet);
}
private AssociationSet CreateAssociationSet(LoadMethodSessionState session,
AssociationType type)
{
AssociationSet set = new AssociationSet(type.Name, type);
foreach(AssociationEndMember end in type.RelationshipEndMembers)
{
EntitySet entitySet = session.GetEntitySet(end);
DbObjectKey key = session.GetKey(entitySet.ElementType);
AssociationSetEnd setEnd = new AssociationSetEnd(entitySet, set, end);
set.AddAssociationSetEnd(setEnd);
}
set.SetReadOnly();
return set;
}
internal RoleBoolean(AssociationSetEnd end)
{
m_metadataItem = end;
}