public void CheckSemantics(IDslModel existingConcepts)
{
if (!(Subtype is IOrmDataStructure))
{
throw new DslSyntaxException(this, "Is (polymorphic) may only be used on a database-mapped data structure, such as Entity or SqlQueryable. "
+ this.Subtype.GetUserDescription() + " is not IOrmDataStructure.");
}
if (ImplementationName == null)
{
throw new DslSyntaxException(this, "ImplementationName must not be null. It is allowed to be an empty string.");
}
if (!string.IsNullOrEmpty(ImplementationName))
{
DslUtility.ValidateIdentifier(ImplementationName, this, "Invalid ImplementationName value.");
}
if (existingConcepts.FindByReference <PolymorphicMaterializedInfo>(pm => pm.Polymorphic, Supertype).Any())
{
// Verifying if the ChangesOnChangedItemsInfo can be created (see IsSubtypeOfMacro)
var dependsOn = DslUtility.GetBaseChangesOnDependency(Subtype, existingConcepts);
if (dependsOn.Count() == 0)
{
throw new DslSyntaxException(this, Subtype.GetUserDescription() + " should be an *extension* of an entity. Otherwise it cannot be used in a materialized polymorphic entity because the system cannot detect when to update the persisted data.");
}
}
}
