AttributedMetaType CreateInheritedType(Type root, Type type)
{
MetaType metaType;
if (!this.types.TryGetValue(type, out metaType))
{
metaType = new AttributedMetaType(this.Model, this.Table, type, this);
this.types.Add(type, metaType);
if (type != root && type.BaseType != typeof(object))
{
CreateInheritedType(root, type.BaseType);
}
}
return((AttributedMetaType)metaType);
}
internal AttributedRootType(AttributedMetaModel model, AttributedMetaTable table, Type type)
: base(model, table, type, null)
{
// check for inheritance and create all other types
InheritanceMappingAttribute[] inheritanceInfo = (InheritanceMappingAttribute[])type.GetCustomAttributes(typeof(InheritanceMappingAttribute), true);
if (inheritanceInfo.Length > 0)
{
if (this.Discriminator == null)
{
throw Error.NoDiscriminatorFound(type);
}
if (!MappingSystem.IsSupportedDiscriminatorType(this.Discriminator.Type))
{
throw Error.DiscriminatorClrTypeNotSupported(this.Discriminator.DeclaringType.Name, this.Discriminator.Name, this.Discriminator.Type);
}
this.types = new Dictionary <Type, MetaType>();
this.types.Add(type, this); // add self
this.codeMap = new Dictionary <object, MetaType>();
// initialize inheritance types
foreach (InheritanceMappingAttribute attr in inheritanceInfo)
{
if (!type.IsAssignableFrom(attr.Type))
{
throw Error.InheritanceTypeDoesNotDeriveFromRoot(attr.Type, type);
}
if (attr.Type.IsAbstract)
{
throw Error.AbstractClassAssignInheritanceDiscriminator(attr.Type);
}
AttributedMetaType mt = this.CreateInheritedType(type, attr.Type);
if (attr.Code == null)
{
throw Error.InheritanceCodeMayNotBeNull();
}
if (mt.inheritanceCode != null)
{
throw Error.InheritanceTypeHasMultipleDiscriminators(attr.Type);
}
//object codeValue = DBConvert.ChangeType(*/attr.Code/*, this.Discriminator.Type);
object codeValue = attr.Code;
foreach (object d in codeMap.Keys)
{
// if the keys are equal, or if they are both strings containing only spaces
// they are considered equal
if ((codeValue.GetType() == typeof(string) &&
((string)codeValue).Trim().Length == 0 &&
d.GetType() == typeof(string) &&
((string)d).Trim().Length == 0) ||
object.Equals(d, codeValue))
{
throw Error.InheritanceCodeUsedForMultipleTypes(codeValue);
}
}
mt.inheritanceCode = codeValue;
this.codeMap.Add(codeValue, mt);
if (attr.IsDefault)
{
if (this.InheritanceDefault != null)
{
throw Error.InheritanceTypeHasMultipleDefaults(type);
}
this.InheritanceDefault = mt;
}
}
if (this.InheritanceDefault == null)
{
throw Error.InheritanceHierarchyDoesNotDefineDefault(type);
}
}
if (this.types != null)
{
this.InheritanceTypes = this.types.Values.ToList().AsReadOnly();
}
else
{
this.InheritanceTypes = new MetaType[] { this }.ToList().AsReadOnly();
}
Validate();
}