internal static XElement ConstructEntityContainer(
EdmItemCollection edm, string databaseSchemaName, string csdlNamespace, string ssdlNamespace)
{
var entityContainerElement =
new XElement(
_ssdl + "EntityContainer",
new XAttribute("Name", OutputGeneratorHelpers.ConstructStorageEntityContainerName(csdlNamespace)));
#region Constructing EntitySets
// In TPT, we need to create the SSDL EntitySets from the EntityTypes; we create another table for the derived type.
foreach (var entityType in edm.GetAllEntityTypes())
{
var entitySetElement = ConstructEntitySet(
ssdlNamespace, OutputGeneratorHelpers.GetStorageEntityTypeName(entityType, edm),
OutputGeneratorHelpers.GetStorageEntityTypeName(entityType, edm), "Tables", databaseSchemaName);
// we would also tack on DefiningQueries here if we wanted
entityContainerElement.Add(entitySetElement);
}
// Find all *:* Associations and create EntitySets in the SSDL
foreach (var associationSet in edm.GetAllAssociationSets().Where(set => set.GetAssociation().IsManyToMany()))
{
var entitySetElement = ConstructEntitySet(
ssdlNamespace, associationSet.Name, associationSet.ElementType.Name, "Tables", databaseSchemaName);
entityContainerElement.Add(entitySetElement);
}
#endregion
#region Constructing AssociationSets
foreach (var associationSet in edm.GetAllAssociationSets())
{
var assoc = associationSet.GetAssociation();
if (assoc.GetEnd1() != null &&
assoc.GetEnd2() != null)
{
// *:* C-Space associations: we will have two S-space associations bound to the pair table corresponding to each end
if (assoc.IsManyToMany())
{
// create an association from the first end to the pair table
var associationSet1Element = ConstructAssociationSet(
ssdlNamespace,
OutputGeneratorHelpers.GetStorageAssociationSetNameFromManyToMany(associationSet, assoc.GetEnd1()),
OutputGeneratorHelpers.GetStorageAssociationNameFromManyToMany(assoc.GetEnd1()),
assoc.GetEnd1().Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(assoc.GetEnd1().GetEntityType(), edm),
assoc.Name,
associationSet.Name);
// create an association from the second end to the pair table
var associationSet2Element = ConstructAssociationSet(
ssdlNamespace,
OutputGeneratorHelpers.GetStorageAssociationSetNameFromManyToMany(associationSet, assoc.GetEnd2()),
OutputGeneratorHelpers.GetStorageAssociationNameFromManyToMany(assoc.GetEnd2()),
assoc.GetEnd2().Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(assoc.GetEnd2().GetEntityType(), edm),
assoc.Name,
associationSet.Name);
entityContainerElement.Add(associationSet1Element);
entityContainerElement.Add(associationSet2Element);
}
// All other associations: we essentially mirror the C-space associations
else
{
var associationSetElement = ConstructAssociationSet(
ssdlNamespace,
associationSet.Name,
assoc.Name,
assoc.GetEnd1().Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(assoc.GetEnd1().GetEntityType(), edm),
assoc.GetEnd2().Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(assoc.GetEnd2().GetEntityType(), edm));
entityContainerElement.Add(associationSetElement);
}
}
}
// Now we will construct AssociationSets with PK:PK associations based off of inheritance
foreach (var derivedType in edm.GetAllEntityTypes().Where(et => et.BaseType != null))
{
entityContainerElement.Add(
ConstructAssociationSet(
ssdlNamespace,
String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewFKConstraintDerivedType, derivedType.Name,
derivedType.BaseType.Name),
String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewFKConstraintDerivedType, derivedType.Name,
derivedType.BaseType.Name),
derivedType.BaseType.Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType.BaseType as EntityType, edm),
derivedType.Name,
OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType, edm)));
}
#endregion
var csdlEntityContainer = edm.GetItems <EntityContainer>().FirstOrDefault();
Debug.Assert(csdlEntityContainer != null, "Could not find the CSDL EntityContainer to migrate extended properties");
if (csdlEntityContainer != null)
{
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(csdlEntityContainer, entityContainerElement);
}
return(entityContainerElement);
}
internal static List <XElement> ConstructAssociations(EdmItemCollection edm, string ssdlNamespace)
{
var associations = new List <XElement>();
// Ignore *:* associations for now, just translate the CSDL Associations into SSDL Associations
foreach (var association in edm.GetItems <AssociationType>().Where(a => !a.IsManyToMany()))
{
var associationElement = new XElement(_ssdl + "Association", new XAttribute("Name", association.Name));
var principalEnd = association.GetPrincipalEnd();
var dependentEnd = association.GetDependentEnd();
// 1. If we have a PK:PK relationship that has a ref constraint, then the multiplicity of the
// dependent end will always be 0..1.
// 2. If we have a PK:PK relationship without a ref constraint, the multiplicity will
// always be *.
// 3. If we have any other relationship, regardless of the ref constraint, we simply
// mirror the multiplicity from the C-side.
if (principalEnd != null &&
dependentEnd != null)
{
foreach (var end in association.AssociationEndMembers)
{
var entityType = end.GetEntityType();
var multiplicity = TranslateMultiplicity(end.RelationshipMultiplicity);
if (end == dependentEnd &&
association.IsPKToPK())
{
multiplicity = (association.ReferentialConstraints.Count > 0)
? TranslateMultiplicity(RelationshipMultiplicity.ZeroOrOne)
: TranslateMultiplicity(RelationshipMultiplicity.Many);
}
var associationEnd = new XElement(
_ssdl + "End",
new XAttribute("Role", end.Name),
new XAttribute("Type", ssdlNamespace + "." + OutputGeneratorHelpers.GetStorageEntityTypeName(entityType, edm)),
new XAttribute("Multiplicity", multiplicity));
// Now we will attempt to add an OnDelete="Cascade" rule
if (end.GetOnDelete() == OperationAction.Cascade)
{
associationEnd.Add(
new XElement(
_ssdl + "OnDelete",
new XAttribute("Action", "Cascade")));
}
associationElement.Add(associationEnd);
}
}
// 1. If we have an existing ref constraint in the C-side, then we will simply mirror that in the SSDL.
// 2. If we have a non *:* association without a ref constraint, then we specify the foreign keys' names of
// the dependent entity type (which is the principal entity type's keys' names)
if (association.ReferentialConstraints.Count > 0)
{
var refConstraint = association.ReferentialConstraints.FirstOrDefault();
if (refConstraint != null)
{
associationElement.Add(
ConstructReferentialConstraintInternal(
refConstraint.FromRole.Name,
refConstraint.FromProperties.Select(fp => fp.Name),
refConstraint.ToRole.Name,
refConstraint.ToProperties.Select(tp => tp.Name)));
}
}
else
{
associationElement.Add(
ConstructReferentialConstraint(
principalEnd.Name,
principalEnd,
dependentEnd.Name,
dependentEnd));
}
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(association, associationElement);
associations.Add(associationElement);
}
// Now let's tackle the *:* Associations. A *:* conceptual Association means that there is actually a pair table
// in the database, and two relationships -- one from the first end to the pair table and another from the pair table
// to the second end.
// For *:* associations, we'll also identify any extended properties and migrate them to _both_ associations on the S-side.
foreach (var m2mAssoc in edm.GetItems <AssociationType>().Where(a => a.IsManyToMany()))
{
if (m2mAssoc.GetEnd1() != null &&
m2mAssoc.GetEnd2() != null)
{
var entityType1 = m2mAssoc.GetEnd1().GetEntityType();
var entityType2 = m2mAssoc.GetEnd2().GetEntityType();
if (entityType1 != null &&
entityType2 != null)
{
var associationElement1 = new XElement(
_ssdl + "Association",
new XAttribute("Name", OutputGeneratorHelpers.GetStorageAssociationNameFromManyToMany(m2mAssoc.GetEnd1())));
associationElement1.Add(
new XElement(
_ssdl + "End",
new XAttribute("Role", m2mAssoc.GetEnd1().Name),
new XAttribute(
"Type", ssdlNamespace + "." + OutputGeneratorHelpers.GetStorageEntityTypeName(entityType1, edm)),
new XAttribute("Multiplicity", "1")));
associationElement1.Add(
new XElement(
_ssdl + "End",
new XAttribute("Role", m2mAssoc.Name),
new XAttribute("Type", ssdlNamespace + "." + m2mAssoc.Name),
new XAttribute("Multiplicity", "*")));
associationElement1.Add(
ConstructReferentialConstraint(m2mAssoc.GetEnd1().Name, m2mAssoc.GetEnd1(), m2mAssoc.Name, m2mAssoc.GetEnd2()));
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(m2mAssoc, associationElement1);
associations.Add(associationElement1);
var associationElement2 = new XElement(
_ssdl + "Association",
new XAttribute("Name", OutputGeneratorHelpers.GetStorageAssociationNameFromManyToMany(m2mAssoc.GetEnd2())));
associationElement2.Add(
new XElement(
_ssdl + "End",
new XAttribute("Role", m2mAssoc.Name),
new XAttribute("Type", ssdlNamespace + "." + m2mAssoc.Name),
new XAttribute("Multiplicity", "*")));
associationElement2.Add(
new XElement(
_ssdl + "End",
new XAttribute("Role", m2mAssoc.GetEnd2().Name),
new XAttribute(
"Type", ssdlNamespace + "." + OutputGeneratorHelpers.GetStorageEntityTypeName(entityType2, edm)),
new XAttribute("Multiplicity", "1")));
associationElement2.Add(
ConstructReferentialConstraint(m2mAssoc.GetEnd2().Name, m2mAssoc.GetEnd2(), m2mAssoc.Name, m2mAssoc.GetEnd1()));
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(m2mAssoc, associationElement2);
associations.Add(associationElement2);
}
}
}
// Finally, we will add PK:PK Associations for any inheritance found in the conceptual. These will translate into PK constraints
// in the DDL which will round-trip back in an identifiable way. Base Type's role in this association will have OnDelete action
// set to Cascade so that if you delete a row from the base table, any corresponding rows in the child table will also be deleted.
foreach (var derivedType in edm.GetAllEntityTypes().Where(et => et.BaseType != null))
{
var pkAssociation = new XElement(
_ssdl + "Association",
new XAttribute(
"Name",
String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewFKConstraintDerivedType, derivedType.Name,
derivedType.BaseType.Name)));
var baseTypeRole = new XElement(
_ssdl + "End",
new XAttribute("Role", derivedType.BaseType.Name),
new XAttribute(
"Type",
ssdlNamespace + "." + OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType.BaseType as EntityType, edm)),
new XAttribute("Multiplicity", "1"));
pkAssociation.Add(baseTypeRole);
baseTypeRole.Add(new XElement(_ssdl + "OnDelete", new XAttribute("Action", "Cascade")));
pkAssociation.Add(
new XElement(
_ssdl + "End",
new XAttribute("Role", derivedType.Name),
new XAttribute("Type", ssdlNamespace + "." + OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType, edm)),
new XAttribute("Multiplicity", "0..1")));
pkAssociation.Add(
ConstructReferentialConstraintInternal(
derivedType.BaseType.Name,
derivedType.GetRootOrSelf().GetKeyProperties().Select(k => k.Name),
derivedType.Name,
derivedType.GetRootOrSelf().GetKeyProperties().Select(k => k.Name)));
associations.Add(pkAssociation);
}
return(associations);
}
