/// <summary>
/// Generate XSD schema info for relationships.
/// Specifically, register a named complexTyped, which can be referred to from entity types that are valid endpoints.
/// </summary>
private void AddRelationships()
{
// Note: both of either explicit relationship instances, or direct instances of the foreign type, can be embedded here.
// However due to XSD limitations, the former must appear before the latter in the XML files.
// E.g.
// <xs:element name="fieldIsOnType">
// <xs:complexType mixed="true">
// <xs:sequence>
// <xs:element minOccurs="0" maxOccurs="unbounded" ref="fieldIsOnType.instance" />
// <xs:group minOccurs="0" maxOccurs="unbounded" ref="is_type" />
// <xs:sequence>
// </xs:complexType>
// </xs:element>
var relationships = EffectiveRelationships(_schemaManager.GetInstancesOfType(A(Aliases.Relationship)));
// Prefetch the cardinality enum values
foreach (EffectiveRelationship relationship in relationships)
{
XmlSchema xsd = GetSchema(relationship.Alias.Namespace);
// Provide for explicit relationships instances that specify from/to
AddRelationshipInstanceElement(relationship, xsd);
if (relationship.IsSingleEnum)
{
AddEnumValues(relationship);
continue;
}
// Get expected child type
Entity toType;
if (relationship.IsReverseAlias)
{
toType = _schemaManager.GetRelationshipFromType(relationship.Type);
}
else
{
toType = _schemaManager.GetRelationshipToType(relationship.Type);
}
// Determine cardinality
var cardinality = _schemaManager.GetCardinality(relationship.Type);
bool isBounded =
cardinality == Aliases.OneToOne ||
cardinality == Aliases.ManyToOne && !relationship.IsReverseAlias ||
cardinality == Aliases.OneToMany && relationship.IsReverseAlias;
string maxOccurs = isBounded ? "1" : "unbounded";
// Build XSD
var sequence = new XmlSchemaSequence();
sequence.Items.Add(new XmlSchemaGroupRef()
{
RefName = NameUsed(toType.Alias.ToQualifiedName("is_", null)),
MinOccurs = 0,
MaxOccursString = maxOccurs
});
var complexType = new XmlSchemaComplexType()
{
IsMixed = true,
Particle = sequence
};
var relElement = new XmlSchemaElement();
relElement.Name = NameDeclared(relationship.Alias.Value, relationship.Alias.Namespace);
relElement.SchemaType = complexType;
// Add to schema
xsd.Items.Add(relElement);
}
}