System.Xml.Serialization.SoapSchemaImporter.ImportEnumeratedDataType C# (CSharp) Method

        TypeMapping ImportEnumeratedDataType(XmlSchemaSimpleType dataType, string typeNs, string identifier, bool isList) {
            TypeMapping mapping = (TypeMapping)ImportedMappings[dataType];
            if (mapping != null)
                return mapping;

            XmlSchemaSimpleType sourceDataType = FindDataType(dataType.DerivedFrom);
            TypeDesc sourceTypeDesc = Scope.GetTypeDesc(sourceDataType);
            if (sourceTypeDesc != null && sourceTypeDesc != Scope.GetTypeDesc(typeof(string)))
                return ImportPrimitiveDataType(dataType);
            identifier = Accessor.UnescapeName(identifier);
            string typeName = GenerateUniqueTypeName(identifier);
            EnumMapping enumMapping = new EnumMapping();
            enumMapping.IsReference = Schemas.IsReference(dataType);
            enumMapping.TypeDesc = new TypeDesc(typeName, typeName, TypeKind.Enum, null, 0);
            enumMapping.TypeName = identifier;
            enumMapping.Namespace = typeNs;
            enumMapping.IsFlags = isList;
            CodeIdentifiers constants = new CodeIdentifiers();

            if (!(dataType.Content is XmlSchemaSimpleTypeRestriction))
                throw new InvalidOperationException(Res.GetString(Res.XmlInvalidEnumContent, dataType.Content.GetType().Name, identifier));

            XmlSchemaSimpleTypeRestriction restriction = (XmlSchemaSimpleTypeRestriction)dataType.Content;

            for (int i = 0; i < restriction.Facets.Count; i++) {
                object facet = restriction.Facets[i];
                if (!(facet is XmlSchemaEnumerationFacet)) continue;
                XmlSchemaEnumerationFacet enumeration = (XmlSchemaEnumerationFacet)facet;
                ConstantMapping constant = new ConstantMapping();
                string constantName = CodeIdentifier.MakeValid(enumeration.Value);
                constant.Name = constants.AddUnique(constantName, constant);
                constant.XmlName = enumeration.Value;
                constant.Value = i;
            }
            enumMapping.Constants = (ConstantMapping[])constants.ToArray(typeof(ConstantMapping));
            if (isList && enumMapping.Constants.Length > 63) {
                // if we have 64+ flag constants we cannot map the type to long enum, we will use string mapping instead.
                mapping = new PrimitiveMapping();
                mapping.TypeDesc = Scope.GetTypeDesc(typeof(string));
                mapping.TypeName = mapping.TypeDesc.DataType.Name;
                ImportedMappings.Add(dataType, mapping);
                return mapping;
            }
            ImportedMappings.Add(dataType, enumMapping);
            Scope.AddTypeMapping(enumMapping);
            return enumMapping;
        }