public static void WriteSsdl(this StoreItemCollection storeItemCollection, XmlWriter writer, string schemaNamespaceName = null)
{
Debug.Assert(storeItemCollection != null, "storeItemCollection != null");
Debug.Assert(writer != null, "writer != null");
// In the StoreItemCollection all non-primitive types (either EntityType or AssociationType) are in the same namespace.
// If there is any EntityType we should use the namespace of this type and it should win over the namespace defined by the user
// otherwise we could "move" all the types to the namespace defined by the user since in the SsdlWriter we use the namespace
// alias when writing the type (note that if we used the namespace instead of alias we could create an invalid Ssdl since
// the types would be in a different (and undefined) namespace then the one written on the Schema element).
// To infer the namespace we use EntitType because you any other type with a namespace (e.g. EntitySet, AssociationType etc.)
// refer to an entity type. If there are no entity types we will use the namespace name provided by the user or - if it is null
// or empty - we will an arbitrary one (at this point the schema name does not really matter since the collection
// does not have any type that would use it)
var entityType = storeItemCollection.GetItems <EntityType>().FirstOrDefault();
if (entityType != null)
{
schemaNamespaceName = entityType.NamespaceName;
}
else if (string.IsNullOrWhiteSpace(schemaNamespaceName))
{
schemaNamespaceName = "Model.Store";
}
new SsdlSerializer()
.Serialize(
storeItemCollection.ToEdmModel(),
schemaNamespaceName,
storeItemCollection.ProviderInvariantName,
storeItemCollection.ProviderManifestToken,
writer,
serializeDefaultNullability: false);
}