public MetadataLoadResult LoadMetadata(string inputFile)
{
var loader = new MetadataLoader(this);
bool loaded = false;
EdmItemCollection edmItemCollection = loader.CreateEdmItemCollection(inputFile);
StoreItemCollection storeItemCollection = null;
if (loader.TryCreateStoreItemCollection(inputFile, out storeItemCollection))
{
StorageMappingItemCollection storageMappingItemCollection;
if (loader.TryCreateStorageMappingItemCollection(inputFile, edmItemCollection, storeItemCollection, out storageMappingItemCollection))
{
loaded = true;
}
}
if (loaded == false)
{
throw new Exception("Cannot load a metadata from the file " + inputFile);
}
var mappingMetadata = LoadMappingMetadata(inputFile);
var mappingNode = mappingMetadata.Item1;
var nsmgr = mappingMetadata.Item2;
var allEntitySets = storeItemCollection.GetAllEntitySets();
return(new MetadataLoadResult
{
EdmItems = edmItemCollection,
PropertyToColumnMapping = BuildEntityMappings(mappingNode, nsmgr, edmItemCollection.GetItems <EntityType>(), edmItemCollection.GetAllEntitySets(), allEntitySets),
ManyToManyMappings = BuildManyToManyMappings(mappingNode, nsmgr, edmItemCollection.GetAllAssociationSets(), allEntitySets),
TphMappings = BuildTPHMappings(mappingNode, nsmgr, edmItemCollection.GetItems <EntityType>(), edmItemCollection.GetAllEntitySets(), allEntitySets)
});
}
public EdmMapping(EdmItemCollection conceptual, StoreItemCollection store, XmlReader mappingReader)
{
// Pull mapping xml out
var mappingDoc = new XmlDocument();
mappingDoc.Load(mappingReader);
var entitySets = conceptual.GetItems <EntityContainer>().Single().BaseEntitySets.OfType <System.Data.Entity.Core.Metadata.Edm.EntitySet>();
var associationSets = conceptual.GetItems <EntityContainer>().Single().BaseEntitySets.OfType <System.Data.Entity.Core.Metadata.Edm.AssociationSet>();
var tableSets = store.GetItems <EntityContainer>().Single().BaseEntitySets.OfType <System.Data.Entity.Core.Metadata.Edm.EntitySet>().ToArray();
this.EntityMappings = BuildEntityMappings(mappingDoc, entitySets, tableSets);
this.ManyToManyMappings = BuildManyToManyMappings(mappingDoc, associationSets, tableSets);
}
public void ToLegacyEdmTypeUsage_returns_legacy_type_for_RowType()
{
const string csdl =
"<Schema Namespace='AdventureWorksModel' Alias='Self' p1:UseStrongSpatialTypes='false' xmlns:annotation='http://schemas.microsoft.com/ado/2009/02/edm/annotation' xmlns:p1='http://schemas.microsoft.com/ado/2009/02/edm/annotation' xmlns='http://schemas.microsoft.com/ado/2009/11/edm'>"
+
" <Function Name='LastNamesAfter'>" +
" <Parameter Name='someString' Type='Edm.String' />" +
" <ReturnType>" +
" <RowType>" +
" <Property Name='FirstName' Type='Edm.String' Nullable='false' />" +
" <Property Name='LastName' Type='Edm.String' Nullable='false' />" +
" </RowType>" +
" </ReturnType>" +
" <DefiningExpression>dummy</DefiningExpression>" +
" </Function>" +
"</Schema>";
var edmItemCollection = new EdmItemCollection(new[] { XmlReader.Create(new StringReader(csdl)) });
var rowTypeUsage =
edmItemCollection.GetItems <EdmFunction>().Single(f => f.FullName == "AdventureWorksModel.LastNamesAfter")
.ReturnParameters[0]
.TypeUsage;
TypeUsageVerificationHelper.VerifyTypeUsagesEquivalent(rowTypeUsage.ToLegacyEdmTypeUsage(), rowTypeUsage);
}
public void ToLegacyEdmTypeUsage_returns_legacy_type_for_RowType()
{
const string csdl =
"<Schema Namespace='AdventureWorksModel' Alias='Self' p1:UseStrongSpatialTypes='false' xmlns:annotation='http://schemas.microsoft.com/ado/2009/02/edm/annotation' xmlns:p1='http://schemas.microsoft.com/ado/2009/02/edm/annotation' xmlns='http://schemas.microsoft.com/ado/2009/11/edm'>"
+
" <Function Name='LastNamesAfter'>" +
" <Parameter Name='someString' Type='Edm.String' />" +
" <ReturnType>" +
" <RowType>" +
" <Property Name='FirstName' Type='Edm.String' Nullable='false' />" +
" <Property Name='LastName' Type='Edm.String' Nullable='false' />" +
" </RowType>" +
" </ReturnType>" +
" <DefiningExpression>dummy</DefiningExpression>" +
" </Function>" +
"</Schema>";
var edmItemCollection = new EdmItemCollection(new[] { XmlReader.Create(new StringReader(csdl)) });
var rowTypeUsage =
edmItemCollection.GetItems<EdmFunction>().Single(f => f.FullName == "AdventureWorksModel.LastNamesAfter")
.ReturnParameters[0]
.TypeUsage;
TypeUsageVerificationHelper.VerifyTypeUsagesEquivalent(rowTypeUsage.ToLegacyEdmTypeUsage(), rowTypeUsage);
}
internal static Dictionary <EntityType, Set <EntityType> > BuildUndirectedGraphOfTypes(
EdmItemCollection edmItemCollection)
{
Dictionary <EntityType, Set <EntityType> > graph = new Dictionary <EntityType, Set <EntityType> >();
foreach (EntityType entityType in (IEnumerable <EntityType>)edmItemCollection.GetItems <EntityType>())
{
if (entityType.BaseType != null)
{
EntityType baseType = entityType.BaseType as EntityType;
MetadataHelper.AddDirectedEdgeBetweenEntityTypes(graph, entityType, baseType);
MetadataHelper.AddDirectedEdgeBetweenEntityTypes(graph, baseType, entityType);
}
}
return(graph);
}
// <summary>
// Builds an undirected graph (represented as a directional graph with reciprocal navigation edges) of the all the types in the workspace.
// This is used to traverse inheritance hierarchy up and down.
// O(n), where n=number of types
// </summary>
// <returns> A dictionary of type t -> set of types {s}, such that there is an edge between t and elem(s) iff t and s are related DIRECTLY via inheritance (child or parent type) </returns>
internal static Dictionary <EntityType, Set <EntityType> > BuildUndirectedGraphOfTypes(EdmItemCollection edmItemCollection)
{
var graph = new Dictionary <EntityType, Set <EntityType> >();
IEnumerable <EntityType> typesInWorkSpace = edmItemCollection.GetItems <EntityType>();
foreach (var childType in typesInWorkSpace)
{
if (childType.BaseType == null) //root type
{
continue;
}
var parentType = childType.BaseType as EntityType;
Debug.Assert(parentType != null, "Parent type not Entity Type ??");
AddDirectedEdgeBetweenEntityTypes(graph, childType, parentType);
AddDirectedEdgeBetweenEntityTypes(graph, parentType, childType);
}
return(graph);
}
internal IEnumerable <EdmType> GetDirectSubTypes(EdmType edmType)
{
return(_edmItemCollection.GetItems <EdmType>().Where(b => b.BaseType == edmType));
}
[Fact] // CodePlex 2051
public void Can_load_model_after_assembly_version_of_types_changes()
{
var edmItemCollection = new EdmItemCollection(new[] { XDocument.Parse(CsdlWithVersion).CreateReader() });
Assert.Null(GetClrType(edmItemCollection.GetItems <EntityType>().Single(e => e.Name == "Man")));
}
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);
}
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", 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.GetFkName(assoc, assoc.GetEnd2(), key.Name))));
}
foreach (var key in assoc.GetEnd2().GetKeyProperties())
{
keyElement.Add(
new XElement(
_ssdl + "PropertyRef",
new XAttribute("Name", OutputGeneratorHelpers.GetFkName(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.GetFkName(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.GetFkName(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);
}
/// <summary>
/// Returns the names of the items in the supplied collection that correspond to O-Space types.
/// </summary>
public IEnumerable <string> GetAllGlobalItems(EdmItemCollection itemCollection)
{
return(itemCollection.GetItems <GlobalItem>().Where(i => i is EntityType || i is ComplexType || i is EnumType || i is EntityContainer).Select(g => GetGlobalItemName(g)));
}
public static IEnumerable <EntityType> GetEntities(EdmItemCollection items)
{
return(items.GetItems <EntityType>().Where(e => !Ignore(e)).OrderBy(e => e.Name));
}