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239 lines (207 loc) · 9.03 KB
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using NpgsqlTypes;
namespace NpgsqlRest;
public class TypeDescriptor
{
public string OriginalType { get; }
public string Type { get; }
public bool IsArray { get; }
public NpgsqlDbType DbType { get; }
public NpgsqlDbType BaseDbType { get; }
public NpgsqlDbType ActualDbType { get; }
public bool HasDefault { get; private set; }
public bool IsPk { get; }
public bool IsIdentity { get; }
public string? CustomType { get; }
public short? CustomTypePosition { get; }
public string? OriginalParameterName { get; }
public string? CustomTypeName { get; }
internal bool ShouldRenderAsUnknownType => IsBinary is false;
/// <summary>
/// Pre-computed type category flags for optimized type dispatch.
/// Use bitwise operations for fast type checking in hot paths.
/// </summary>
public TypeCategory Category { get; }
// Computed properties from Category for backward compatibility
public bool IsNumeric => (Category & TypeCategory.Numeric) != 0;
public bool IsJson => (Category & TypeCategory.Json) != 0;
public bool IsDate => (Category & TypeCategory.Date) != 0;
public bool IsDateTime => (Category & TypeCategory.DateTime) != 0;
public bool IsBoolean => (Category & TypeCategory.Boolean) != 0;
public bool IsText => (Category & TypeCategory.Text) != 0;
public bool NeedsEscape { get; }
public bool IsBinary => (Category & TypeCategory.Binary) != 0;
// Properties for nested composite type support
/// <summary>
/// For fields that are composite types, the converted field names of the nested type.
/// Null if this is not a composite type field.
/// </summary>
public string[]? CompositeFieldNames { get; internal set; }
/// <summary>
/// For fields that are composite types, the type descriptors for each nested field.
/// Null if this is not a composite type field.
/// </summary>
public TypeDescriptor[]? CompositeFieldDescriptors { get; internal set; }
/// <summary>
/// For fields that are arrays of composite types, the converted field names of the element type.
/// Null if this is not an array of composite type field.
/// </summary>
public string[]? ArrayCompositeFieldNames { get; internal set; }
/// <summary>
/// For fields that are arrays of composite types, the type descriptors for each element field.
/// Null if this is not an array of composite type field.
/// </summary>
public TypeDescriptor[]? ArrayCompositeFieldDescriptors { get; internal set; }
/// <summary>
/// True if this field is a composite type with resolved nested field metadata.
/// </summary>
public bool IsCompositeType => CompositeFieldNames != null;
/// <summary>
/// True if this field is an array of composite types with resolved nested field metadata.
/// </summary>
public bool IsArrayOfCompositeType => ArrayCompositeFieldNames != null;
public TypeDescriptor(
string type,
bool hasDefault = false,
bool isPk = false,
bool isIdentity = false,
string? customType = null,
short? customTypePosition = null,
string? originalParameterName = null,
string? customTypeName = null)
{
OriginalType = type;
HasDefault = hasDefault;
IsPk = isPk;
IsIdentity = isIdentity;
IsArray = type.EndsWith("[]");
Type = (IsArray ? type[..^2] : type).Trim(Consts.DoubleQuote);
DbType = GetDbType();
BaseDbType = DbType;
// Use pre-computed lookup table for type category
Category = TypeCategoryLookup.GetCategory(BaseDbType);
ActualDbType = (Category & TypeCategory.CastToText) != 0 ? NpgsqlDbType.Text : BaseDbType;
if (IsArray)
{
DbType |= NpgsqlDbType.Array;
ActualDbType |= NpgsqlDbType.Array;
}
NeedsEscape = (Category & TypeCategory.NeedsEscape) != 0;
CustomType = customType;
CustomTypePosition = customTypePosition;
OriginalParameterName = originalParameterName;
CustomTypeName = customTypeName;
}
internal void SetHasDefault()
{
HasDefault = true;
}
public bool IsCastToText() => (Category & TypeCategory.CastToText) != 0;
private NpgsqlDbType GetDbType()
{
// Strip type modifiers (length, precision, scale) before matching
// e.g., "character(1)" -> "character", "numeric(10,2)" -> "numeric"
var normalizedType = Type;
var parenIndex = Type.IndexOf('(');
if (parenIndex > 0)
{
normalizedType = Type.Substring(0, parenIndex);
}
var result = normalizedType switch
{
"smallint" => NpgsqlDbType.Smallint,
"int" => NpgsqlDbType.Integer,
"integer" => NpgsqlDbType.Integer,
"bigint" => NpgsqlDbType.Bigint,
"decimal" => NpgsqlDbType.Numeric,
"numeric" => NpgsqlDbType.Numeric,
"real" => NpgsqlDbType.Real,
"double precision" => NpgsqlDbType.Double,
"float" => NpgsqlDbType.Double,
"int2" => NpgsqlDbType.Smallint,
"int4" => NpgsqlDbType.Integer,
"int8" => NpgsqlDbType.Bigint,
"float4" => NpgsqlDbType.Real,
"float8" => NpgsqlDbType.Double,
"money" => NpgsqlDbType.Money,
"smallserial" => NpgsqlDbType.Smallint,
"serial" => NpgsqlDbType.Integer,
"serial2" => NpgsqlDbType.Smallint,
"serial4" => NpgsqlDbType.Integer,
"bigserial" => NpgsqlDbType.Bigint,
"serial8" => NpgsqlDbType.Bigint,
"text" => NpgsqlDbType.Text,
"xml" => NpgsqlDbType.Xml,
"varchar" => NpgsqlDbType.Varchar,
"character varying" => NpgsqlDbType.Varchar,
"bpchar" => NpgsqlDbType.Char,
"character" => NpgsqlDbType.Char,
"char" => NpgsqlDbType.Char,
"name" => NpgsqlDbType.Name,
"refcursor" => NpgsqlDbType.Refcursor,
"jsonb" => NpgsqlDbType.Jsonb,
"json" => NpgsqlDbType.Json,
"jsonpath" => NpgsqlDbType.JsonPath,
"timestamp" => NpgsqlDbType.Timestamp,
"timestamptz" => NpgsqlDbType.TimestampTz,
"timestamp without time zone" => NpgsqlDbType.Timestamp,
"timestamp with time zone" => NpgsqlDbType.TimestampTz,
"date" => NpgsqlDbType.Date,
"time" => NpgsqlDbType.Time,
"timetz" => NpgsqlDbType.TimeTz,
"time without time zone" => NpgsqlDbType.Time,
"time with time zone" => NpgsqlDbType.TimeTz,
"interval" => NpgsqlDbType.Interval,
"bool" => NpgsqlDbType.Boolean,
"boolean" => NpgsqlDbType.Boolean,
"bytea" => NpgsqlDbType.Bytea,
"uuid" => NpgsqlDbType.Uuid,
"bit varying" => NpgsqlDbType.Varbit,
"varbit" => NpgsqlDbType.Varbit,
"bit" => NpgsqlDbType.Bit,
"cidr" => NpgsqlDbType.Cidr,
"inet" => NpgsqlDbType.Inet,
"macaddr" => NpgsqlDbType.MacAddr,
"macaddr8" => NpgsqlDbType.MacAddr8,
"tsquery" => NpgsqlDbType.TsQuery,
"tsvector" => NpgsqlDbType.TsVector,
"box" => NpgsqlDbType.Box,
"circle" => NpgsqlDbType.Circle,
"line" => NpgsqlDbType.Line,
"lseg" => NpgsqlDbType.LSeg,
"path" => NpgsqlDbType.Path,
"point" => NpgsqlDbType.Point,
"polygon" => NpgsqlDbType.Polygon,
"oid" => NpgsqlDbType.Oid,
"xid" => NpgsqlDbType.Xid,
"xid8" => NpgsqlDbType.Xid8,
"cid" => NpgsqlDbType.Cid,
"regtype" => NpgsqlDbType.Regtype,
"regconfig" => NpgsqlDbType.Regconfig,
"int4range" => NpgsqlDbType.IntegerRange,
"int8range" => NpgsqlDbType.BigIntRange,
"numrange" => NpgsqlDbType.NumericRange,
"tsrange" => NpgsqlDbType.TimestampRange,
"tstzrange" => NpgsqlDbType.TimestampTzRange,
"daterange" => NpgsqlDbType.DateRange,
"int4multirange" => NpgsqlDbType.IntegerMultirange,
"int8multirange" => NpgsqlDbType.BigIntMultirange,
"nummultirange" => NpgsqlDbType.NumericMultirange,
"tsmultirange" => NpgsqlDbType.TimestampMultirange,
"tstzmultirange" => NpgsqlDbType.TimestampTzMultirange,
"datemultirange" => NpgsqlDbType.DateMultirange,
"int2vector" => NpgsqlDbType.Int2Vector,
"oidvector" => NpgsqlDbType.Oidvector,
"pg_lsn" => NpgsqlDbType.PgLsn,
"tid" => NpgsqlDbType.Tid,
"citext" => NpgsqlDbType.Citext,
"lquery" => NpgsqlDbType.LQuery,
"ltree" => NpgsqlDbType.LTree,
"ltxtquery" => NpgsqlDbType.LTxtQuery,
"hstore" => NpgsqlDbType.Hstore,
"geometry" => NpgsqlDbType.Geometry,
"geography" => NpgsqlDbType.Geography,
_ => NpgsqlDbType.Unknown
};
return result;
}
}
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