private static void AddReferenceKeyColumns(List <EntityDataSourceColumn> columns, MetadataWorkspace ocWorkspace, EntitySet entitySet, EntityType entityType, Dictionary <EdmProperty, EntityDataSourcePropertyColumn> entityProperties)
{
foreach (AssociationSetEnd toEnd in GetReferenceEnds(entitySet, entityType, /*forKey*/ true))
{
ReferentialConstraint constraint;
bool isContained = EntityDataSourceUtil.IsContained(toEnd, out constraint);
// Create a group for the end columns
EntityType toType = EntityDataSourceUtil.GetEntityType(toEnd);
Type clrToType = EntityDataSourceUtil.GetClrType(ocWorkspace, toType);
EntityDataSourceReferenceGroup group = EntityDataSourceReferenceGroup.Create(clrToType, toEnd);
// Create a column for every key
foreach (EdmProperty keyMember in GetEntityType(toEnd).KeyMembers)
{
EntityDataSourceColumn controllingColumn = null;
if (isContained)
{
// if this key is 'contained' in the entity, make the referential constrained
// property the principal for the column
int ordinalInConstraint = constraint.FromProperties.IndexOf(keyMember);
// find corresponding member in the current (dependent) entity
EdmProperty correspondingProperty = constraint.ToProperties[ordinalInConstraint];
controllingColumn = entityProperties[correspondingProperty];
}
columns.Add(new EntityDataSourceReferenceKeyColumn(ocWorkspace, group, keyMember, controllingColumn));
}
}
}
internal EntityDataSourceReferenceKeyColumn(MetadataWorkspace workspace, EntityDataSourceReferenceGroup group, EdmProperty keyMember, EntityDataSourceColumn dependent)
: base(CreateDisplayName(group, keyMember), dependent)
{
EntityDataSourceUtil.CheckArgumentNull(group, "group");
EntityDataSourceUtil.CheckArgumentNull(keyMember, "keyMember");
Debug.Assert(EntityDataSourceUtil.IsScalar(keyMember.TypeUsage.EdmType), "Expected primitive or enum type for key members.");
this.group = group;
this.keyMember = keyMember;
this.clrType = EntityDataSourceUtil.GetMemberClrType(workspace, keyMember);
// if the association end is optional (0..1), make sure the CLR type
// is also nullable
if (this.group.End.CorrespondingAssociationEndMember.RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne)
{
this.clrType = EntityDataSourceUtil.MakeNullable(clrType);
this.isNullable = true;
}
}
private static string CreateDisplayName(EntityDataSourceReferenceGroup group, EdmProperty keyMember)
{
EntityDataSourceUtil.CheckArgumentNull(group, "group");
EntityDataSourceUtil.CheckArgumentNull(keyMember, "keyMember");
NavigationProperty navigationProperty;
string result;
if (EntityDataSourceUtil.TryGetCorrespondingNavigationProperty(group.End.CorrespondingAssociationEndMember, out navigationProperty))
{
result = navigationProperty.Name + "." + keyMember.Name;
}
else
{
// if there is no Navigation property, use the TargetTole and KeyMember name
// TargetRole.KeyMember
result = group.End.Name + "." + keyMember.Name;
}
return(result);
}
private static string CreateDisplayName(EntityDataSourceReferenceGroup group, EdmProperty keyMember)
{
EntityDataSourceUtil.CheckArgumentNull(group, "group");
EntityDataSourceUtil.CheckArgumentNull(keyMember, "keyMember");
NavigationProperty navigationProperty;
string result;
if (EntityDataSourceUtil.TryGetCorrespondingNavigationProperty(group.End.CorrespondingAssociationEndMember, out navigationProperty))
{
result = navigationProperty.Name + "." + keyMember.Name;
}
else
{
// if there is no Navigation property, use the TargetTole and KeyMember name
// TargetRole.KeyMember
result = group.End.Name + "." + keyMember.Name;
}
return result;
}
internal EntityDataSourceReferenceKeyColumn(MetadataWorkspace workspace, EntityDataSourceReferenceGroup group, EdmProperty keyMember, EntityDataSourceColumn dependent)
: base(CreateDisplayName(group, keyMember), dependent)
{
EntityDataSourceUtil.CheckArgumentNull(group, "group");
EntityDataSourceUtil.CheckArgumentNull(keyMember, "keyMember");
Debug.Assert(EntityDataSourceUtil.IsScalar(keyMember.TypeUsage.EdmType), "Expected primitive or enum type for key members.");
this.group = group;
this.keyMember = keyMember;
this.clrType = EntityDataSourceUtil.GetMemberClrType(workspace, keyMember);
// if the association end is optional (0..1), make sure the CLR type
// is also nullable
if (this.group.End.CorrespondingAssociationEndMember.RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne)
{
this.clrType = EntityDataSourceUtil.MakeNullable(clrType);
this.isNullable = true;
}
}
