// <summary>
// A name derived from a *:* association will be: FK_[Association Name]_[End Name]. Note that we are
// getting the association name for *one* of the SSDL associations that are inferred from a CSDL *:*
// association. The 'principalEnd' corresponds to the end of the *:* association that will become
// the principal end in the 1:* association (where the * end is the newly-constructed entity corresponding
// to the link table)
// </summary>
internal static string GetStorageAssociationSetNameFromManyToMany(AssociationSet associationSet, AssociationEndMember principalEnd)
{
Debug.Assert(associationSet != null, "AssociationSet should not be null");
Debug.Assert(principalEnd != null, "The principal end cannot be null");
var associationSetName = String.Empty;
if (associationSet != null &&
principalEnd != null)
{
associationSetName = String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewManyToManyAssocName,
OutputGeneratorHelpers.GetTablePrefix(principalEnd.GetEntityType().NamespaceName) + associationSet.Name,
principalEnd.Name);
}
return(associationSetName);
}
// <summary>
// A name derived from a *:* association will be: FK_[Association Name]_[End Name]. Note that we are
// getting the association name for *one* of the SSDL associations that are inferred from a CSDL *:*
// association. The 'principalEnd' corresponds to the end of the *:* association that will become
// the principal end in the 1:* association (where the * end is the newly-constructed entity corresponding
// to the link table)
// </summary>
internal static string GetStorageAssociationNameFromManyToMany(AssociationEndMember principalEnd)
{
var association = principalEnd.DeclaringType as AssociationType;
Debug.Assert(
association != null, "The DeclaringType of the AssociationEndMember " + principalEnd.Name + " should be an AssociationType");
Debug.Assert(principalEnd != null, "The principal end cannot be null");
var associationName = String.Empty;
if (association != null &&
principalEnd != null)
{
associationName = String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewManyToManyAssocName,
OutputGeneratorHelpers.GetTablePrefix(principalEnd.GetEntityType().NamespaceName) + association.Name,
principalEnd.Name);
}
return(associationName);
}
internal static List <XElement> ConstructAssociationSetMappings(
EdmItemCollection edm, string csdlNamespace, Version targetFrameworkVersion)
{
string prefix = OutputGeneratorHelpers.GetTablePrefix(edm.GetNamespace());
var associationSetMappings = new List <XElement>();
foreach (var associationSet in edm.GetAllAssociationSets())
{
var association = associationSet.ElementType;
if (association.IsManyToMany())
{
var entityType1 = association.GetEnd1().GetEntityType();
var entityType2 = association.GetEnd2().GetEntityType();
var associationSetMapping = new XElement(
_msl + "AssociationSetMapping",
new XAttribute("Name", associationSet.Name),
new XAttribute("TypeName", csdlNamespace + "." + associationSet.ElementType.Name),
new XAttribute("StoreEntitySet", prefix + associationSet.Name));
var end1Property = new XElement(_msl + "EndProperty", new XAttribute("Name", association.GetEnd1().Name));
foreach (var property in entityType1.GetKeyProperties())
{
end1Property.Add(
new XElement(
_msl + "ScalarProperty", new XAttribute("Name", property.Name),
new XAttribute(
"ColumnName", OutputGeneratorHelpers.GetFkNameM2M(association, association.GetEnd2(), property.Name))));
}
associationSetMapping.Add(end1Property);
var end2Property = new XElement(_msl + "EndProperty", new XAttribute("Name", association.GetEnd2().Name));
foreach (var property in entityType2.GetKeyProperties())
{
end2Property.Add(
new XElement(
_msl + "ScalarProperty", new XAttribute("Name", property.Name),
new XAttribute(
"ColumnName", OutputGeneratorHelpers.GetFkNameM2M(association, association.GetEnd1(), property.Name))));
}
associationSetMapping.Add(end2Property);
associationSetMappings.Add(associationSetMapping);
}
else
{
if (targetFrameworkVersion == EntityFrameworkVersion.Version1 ||
association.ReferentialConstraints.Count <= 0)
{
var dependentEnd = association.GetDependentEnd();
var principalEnd = association.GetOtherEnd(dependentEnd);
if (dependentEnd != null &&
principalEnd != null)
{
var dependentEntityType = dependentEnd.GetEntityType();
var principalEntityType = principalEnd.GetEntityType();
var associationSetMapping = new XElement(
_msl + "AssociationSetMapping",
new XAttribute("Name", associationSet.Name),
new XAttribute("TypeName", csdlNamespace + "." + associationSet.ElementType.Name),
new XAttribute("StoreEntitySet", OutputGeneratorHelpers.GetStorageEntityTypeName(dependentEntityType, edm)));
var end1Property = new XElement(_msl + "EndProperty", new XAttribute("Name", principalEnd.Name));
foreach (var property in principalEntityType.GetKeyProperties())
{
var columnName = (association.ReferentialConstraints.Count > 0)
? property.GetDependentProperty(association.ReferentialConstraints.FirstOrDefault())
.Name
: OutputGeneratorHelpers.GetFkName(association, dependentEnd, property.Name);
end1Property.Add(
new XElement(
_msl + "ScalarProperty", new XAttribute("Name", property.Name),
new XAttribute("ColumnName", columnName)));
}
associationSetMapping.Add(end1Property);
var end2Property = new XElement(_msl + "EndProperty", new XAttribute("Name", dependentEnd.Name));
foreach (var property in dependentEntityType.GetKeyProperties())
{
end2Property.Add(
new XElement(
_msl + "ScalarProperty", new XAttribute("Name", property.Name),
new XAttribute("ColumnName", property.Name)));
}
associationSetMapping.Add(end2Property);
// All 0..1 ends of a non PK:PK association require an IsNull=false condition
if (dependentEnd.RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne
&&
!association.IsPKToPK())
{
foreach (var key in dependentEntityType.GetKeyProperties())
{
associationSetMapping.Add(
new XElement(
_msl + "Condition", new XAttribute("ColumnName", key.Name), new XAttribute("IsNull", "false")));
}
}
if (principalEnd.RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne)
{
foreach (var key in principalEntityType.GetKeyProperties())
{
associationSetMapping.Add(
new XElement(
_msl + "Condition",
new XAttribute(
"ColumnName", OutputGeneratorHelpers.GetFkName(association, dependentEnd, key.Name)),
new XAttribute("IsNull", "false")));
}
}
associationSetMappings.Add(associationSetMapping);
}
}
}
}
return(associationSetMappings);
}
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, OutputGeneratorHelpers.GetTablePrefix(associationSet.ElementType.NamespaceName) + associationSet.Name,
OutputGeneratorHelpers.GetTablePrefix(associationSet.ElementType.NamespaceName) + 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,
OutputGeneratorHelpers.GetTablePrefix(associationSet.ElementType.NamespaceName) + 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,
OutputGeneratorHelpers.GetTablePrefix(associationSet.ElementType.NamespaceName) + 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,
OutputGeneratorHelpers.GetTablePrefix(assoc.GetEnd1().GetEntityType().NamespaceName) + 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, OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType, edm),
derivedType.BaseType.Name),
String.Format(
CultureInfo.CurrentCulture, Resources.CodeViewFKConstraintDerivedType, OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType, edm),
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",
OutputGeneratorHelpers.GetTablePrefix(edm.GetNamespace()) + 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 + "." + OutputGeneratorHelpers.GetTablePrefix(entityType1.NamespaceName) + m2mAssoc.Name),
new XAttribute("Multiplicity", "*")));
associationElement1.Add(
ConstructReferentialConstraint(m2mAssoc.GetEnd1().Name, m2mAssoc.GetEnd1(), m2mAssoc.Name, m2mAssoc.GetEnd2(), true));
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 + "." + OutputGeneratorHelpers.GetTablePrefix(entityType1.NamespaceName) + 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(), true));
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, OutputGeneratorHelpers.GetStorageEntityTypeName(derivedType, edm),
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);
}
internal static List <XElement> ConstructEntityTypes(
EdmItemCollection edmItemCollection, DbProviderManifest providerManifest, Version targetVersion)
{
var entityTypes = new List <XElement>();
// Translate the CSDL EntityTypes into SSDL EntityTypes
foreach (var csdlEntityType in edmItemCollection.GetAllEntityTypes())
{
var entityTypeElement =
new XElement(
_ssdl + "EntityType",
new XAttribute("Name", OutputGeneratorHelpers.GetStorageEntityTypeName(csdlEntityType, edmItemCollection)));
// Add the keys
if (csdlEntityType.GetRootOrSelf().GetKeyProperties().Any())
{
var keyElement = new XElement(_ssdl + "Key");
foreach (EdmMember key in csdlEntityType.GetRootOrSelf().GetKeyProperties())
{
keyElement.Add(new XElement(_ssdl + "PropertyRef", new XAttribute("Name", key.Name)));
}
entityTypeElement.Add(keyElement);
}
// Add only the properties on the declared type but also add the keys that might be on the root type
foreach (
var property in
csdlEntityType.Properties.Where(p => (p.DeclaringType == csdlEntityType))
.Union(csdlEntityType.GetRootOrSelf().GetKeyProperties()))
{
// If we encounter a ComplexType, we need to recursively flatten it out
// into a list of all contained properties
if (property.IsComplexProperty())
{
property.VisitComplexProperty(
(namePrefix, nestedProperty) =>
{
var propertyElement = new XElement(
_ssdl + "Property",
new XAttribute("Name", namePrefix),
new XAttribute("Type", nestedProperty.GetStoreType(providerManifest)));
// Add StoreGeneratedPattern if it exists, but only add this to the table created from
// the root type
if (property.DeclaringType == csdlEntityType)
{
propertyElement.Add(ConstructStoreGeneratedPatternAttribute(nestedProperty, targetVersion));
}
// Add the facets
foreach (var facet in nestedProperty.InferSsdlFacetsForCsdlProperty(providerManifest))
{
if (facet.Value != null)
{
propertyElement.Add(new XAttribute(facet.Name, facet.Value));
}
}
// We'll identify extended properties on all nested properties and migrate them.
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(nestedProperty, propertyElement);
entityTypeElement.Add(propertyElement);
}, "_", true);
}
else
{
var propertyElement = new XElement(
_ssdl + "Property",
new XAttribute("Name", property.Name),
new XAttribute("Type", property.GetStoreType(providerManifest)));
// Add StoreGeneratedPattern if it exists, but only add this to the table created from
// the root type
if (property.DeclaringType == csdlEntityType)
{
propertyElement.Add(ConstructStoreGeneratedPatternAttribute(property, targetVersion));
}
// Add the facets
foreach (var facet in property.InferSsdlFacetsForCsdlProperty(providerManifest))
{
if (facet.Value != null)
{
var facetValue = facet.Value;
// for DateTime attributes, if allow XAttribute to use its default formatting we end up
// with attribute such as:
// Facet="yyyy-MM-ddTHH:mm:ssZ", but we need Facet="yyyy-MM-dd HH:mm:ss.fffZ" (note the
// space instead of 'T' and the fractions of seconds) to be valid SSDL
if (typeof(DateTime).Equals(facetValue.GetType()))
{
facetValue = string.Format(
CultureInfo.InvariantCulture, "{0:yyyy'-'MM'-'dd HH':'mm':'ss'.'fff'Z'}", facet.Value);
}
propertyElement.Add(new XAttribute(facet.Name, facetValue));
}
}
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(property, propertyElement);
entityTypeElement.Add(propertyElement);
}
}
// 1. If there is a Referential Constraint specified on the C-side then there is no need
// to create foreign keys since the dependent end's primary keys are the foreign keys.
// 2. In other cases, we will have to infer the foreign keys by examining any associations that
// the entity type participates in and add the principal keys as the foreign keys on the
// dependent end.
foreach (var containedAssociation in edmItemCollection.GetAllAssociations()
.Where(
a => (a.IsManyToMany() == false) &&
(a.ReferentialConstraints.Count == 0) &&
(a.GetDependentEnd().GetEntityType() == csdlEntityType)))
{
foreach (var keyProperty in containedAssociation.GetPrincipalEnd().GetEntityType().GetKeyProperties())
{
var propertyElement = new XElement(
_ssdl + "Property",
new XAttribute(
"Name",
OutputGeneratorHelpers.GetFkName(
containedAssociation, containedAssociation.GetDependentEnd(), keyProperty.Name)),
new XAttribute("Type", keyProperty.GetStoreType(providerManifest)));
// Add the facets
foreach (var facet in keyProperty.InferSsdlFacetsForCsdlProperty(providerManifest))
{
if (facet.Value != null &&
!facet.Name.Equals("Nullable", StringComparison.OrdinalIgnoreCase))
{
propertyElement.Add(new XAttribute(facet.Name, facet.Value));
}
}
// The Nullability of this property is dependent on the multiplicity of the association.
// If the principal end's multiplicity is 0..1, then this property is Nullable.
propertyElement.Add(
new XAttribute(
"Nullable",
containedAssociation.GetPrincipalEnd().RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne));
entityTypeElement.Add(propertyElement);
}
}
OutputGeneratorHelpers.CopyExtendedPropertiesToSsdlElement(csdlEntityType, entityTypeElement);
entityTypes.Add(entityTypeElement);
}
// For all *:* Associations, we need a pair table and an associated pair EntityType
foreach (var assoc in edmItemCollection.GetItems <AssociationType>().Where(a => a.IsManyToMany()))
{
var entityTypeElement = new XElement(_ssdl + "EntityType", new XAttribute("Name", OutputGeneratorHelpers.GetTablePrefix(assoc.NamespaceName) + assoc.Name));
// We determine the properties as the aggregation of the primary keys from both ends of the association.
// These properties are also the keys of this new EntityTyp
var keyElement = new XElement(_ssdl + "Key");
foreach (var key in assoc.GetEnd1().GetKeyProperties())
{
keyElement.Add(
new XElement(
_ssdl + "PropertyRef",
new XAttribute("Name", OutputGeneratorHelpers.GetFkNameM2M(assoc, assoc.GetEnd2(), key.Name))));
}
foreach (var key in assoc.GetEnd2().GetKeyProperties())
{
keyElement.Add(
new XElement(
_ssdl + "PropertyRef",
new XAttribute("Name", OutputGeneratorHelpers.GetFkNameM2M(assoc, assoc.GetEnd1(), key.Name))));
}
entityTypeElement.Add(keyElement);
// These are foreign keys as well; we create 0..1 associations so these will be nullable keys
foreach (var property in assoc.GetEnd1().GetKeyProperties())
{
var propertyElement = new XElement(
_ssdl + "Property",
new XAttribute("Name", OutputGeneratorHelpers.GetFkNameM2M(assoc, assoc.GetEnd2(), property.Name)),
new XAttribute("Type", property.GetStoreType(providerManifest)));
// Add the facets
foreach (var facet in property.InferSsdlFacetsForCsdlProperty(providerManifest))
{
if (facet.Value != null)
{
propertyElement.Add(new XAttribute(facet.Name, facet.Value));
}
}
entityTypeElement.Add(propertyElement);
}
foreach (var property in assoc.GetEnd2().GetKeyProperties())
{
var propertyElement = new XElement(
_ssdl + "Property",
new XAttribute("Name", OutputGeneratorHelpers.GetFkNameM2M(assoc, assoc.GetEnd1(), property.Name)),
new XAttribute("Type", property.GetStoreType(providerManifest)));
// Add the facets
foreach (var facet in property.InferSsdlFacetsForCsdlProperty(providerManifest))
{
if (facet.Value != null)
{
propertyElement.Add(new XAttribute(facet.Name, facet.Value));
}
}
entityTypeElement.Add(propertyElement);
}
entityTypes.Add(entityTypeElement);
}
return(entityTypes);
}