private static IEdmTypeReference GetEdmTypeReference(Dictionary <Type, IEdmType> availableTypes, IEdmTypeConfiguration configuration, bool nullable) { Contract.Assert(availableTypes != null); if (configuration == null) { return(null); } EdmTypeKind kind = configuration.Kind; if (kind == EdmTypeKind.Collection) { CollectionTypeConfiguration collectionType = (CollectionTypeConfiguration)configuration; EdmCollectionType edmCollectionType = new EdmCollectionType(GetEdmTypeReference(availableTypes, collectionType.ElementType, nullable)); return(new EdmCollectionTypeReference(edmCollectionType)); } else { Type configurationClrType = TypeHelper.GetUnderlyingTypeOrSelf(configuration.ClrType); if (!configurationClrType.IsEnum) { configurationClrType = configuration.ClrType; } IEdmType type; if (availableTypes.TryGetValue(configurationClrType, out type)) { if (kind == EdmTypeKind.Complex) { return(new EdmComplexTypeReference((IEdmComplexType)type, nullable)); } else if (kind == EdmTypeKind.Entity) { return(new EdmEntityTypeReference((IEdmEntityType)type, nullable)); } else if (kind == EdmTypeKind.Enum) { return(new EdmEnumTypeReference((IEdmEnumType)type, nullable)); } else { throw Error.InvalidOperation(SRResources.UnsupportedEdmTypeKind, kind.ToString()); } } else if (configuration.Kind == EdmTypeKind.Primitive) { PrimitiveTypeConfiguration primitiveTypeConfiguration = configuration as PrimitiveTypeConfiguration; return(new EdmPrimitiveTypeReference(primitiveTypeConfiguration.EdmPrimitiveType, nullable)); } else { throw Error.InvalidOperation(SRResources.NoMatchingIEdmTypeFound, configuration.FullName); } } }