void RegisterBaseType(BackendType backendType)
{
TypeAndMapping typeAndMapping;
if (!HandlerTypes.TryGetValue(backendType.Name, out typeAndMapping))
{
// Backend type not supported by Npgsql
return;
}
var handlerType = typeAndMapping.HandlerType;
var mapping = typeAndMapping.Mapping;
// Instantiate the type handler. If it has a constructor that accepts an NpgsqlConnector, use that to allow
// the handler to make connector-specific adjustments. Otherwise (the normal case), use the default constructor.
var handler = (TypeHandler)(
handlerType.GetConstructor(new[] { typeof(TypeHandlerRegistry) }) != null
? Activator.CreateInstance(handlerType, this)
: Activator.CreateInstance(handlerType)
);
handler.OID = backendType.OID;
_oidIndex[backendType.OID] = handler;
handler.PgName = backendType.Name;
if (mapping.NpgsqlDbType.HasValue)
{
var npgsqlDbType = mapping.NpgsqlDbType.Value;
if (_byNpgsqlDbType.ContainsKey(npgsqlDbType))
{
throw new Exception(String.Format("Two type handlers registered on same NpgsqlDbType {0}: {1} and {2}",
npgsqlDbType, _byNpgsqlDbType[npgsqlDbType].GetType().Name, handlerType.Name));
}
_byNpgsqlDbType[npgsqlDbType] = handler;
handler.NpgsqlDbType = npgsqlDbType;
}
foreach (var dbType in mapping.DbTypes)
{
if (_byDbType.ContainsKey(dbType))
{
throw new Exception(String.Format("Two type handlers registered on same DbType {0}: {1} and {2}",
dbType, _byDbType[dbType].GetType().Name, handlerType.Name));
}
_byDbType[dbType] = handler;
}
foreach (var type in mapping.Types)
{
if (_byType.ContainsKey(type))
{
throw new Exception(String.Format("Two type handlers registered on same .NET type {0}: {1} and {2}",
type, _byType[type].GetType().Name, handlerType.Name));
}
_byType[type] = handler;
}
}
void ActivateEnumType(TypeHandler handler, BackendType backendType)
{
handler.PgName = backendType.Name;
handler.OID = backendType.OID;
handler.NpgsqlDbType = NpgsqlDbType.Enum;
_oidIndex[backendType.OID] = handler;
_byType[handler.GetFieldType()] = handler;
if (backendType.Array != null)
{
RegisterArrayType(backendType.Array);
}
}
void RegisterArrayType(BackendType backendType)
{
Contract.Requires(backendType.Element != null);
TypeHandler elementHandler;
if (!_oidIndex.TryGetValue(backendType.Element.OID, out elementHandler))
{
// Array type referring to an unhandled element type
return;
}
ArrayHandler arrayHandler;
var asBitStringHandler = elementHandler as BitStringHandler;
if (asBitStringHandler != null)
{
// BitString requires a special array handler which returns bool or BitArray
arrayHandler = new BitStringArrayHandler(asBitStringHandler);
}
else if (elementHandler is ITypeHandlerWithPsv)
{
var arrayHandlerType = typeof(ArrayHandlerWithPsv <,>).MakeGenericType(elementHandler.GetFieldType(), elementHandler.GetProviderSpecificFieldType());
arrayHandler = (ArrayHandler)Activator.CreateInstance(arrayHandlerType, elementHandler);
}
else
{
var arrayHandlerType = typeof(ArrayHandler <>).MakeGenericType(elementHandler.GetFieldType());
arrayHandler = (ArrayHandler)Activator.CreateInstance(arrayHandlerType, elementHandler);
}
arrayHandler.PgName = "array";
arrayHandler.OID = backendType.OID;
_oidIndex[backendType.OID] = arrayHandler;
if (elementHandler is IEnumHandler)
{
if (_byEnumTypeAsArray == null)
{
_byEnumTypeAsArray = new Dictionary <Type, TypeHandler>();
}
var enumType = elementHandler.GetType().GetGenericArguments()[0];
Contract.Assert(enumType.GetTypeInfo().IsEnum);
_byEnumTypeAsArray[enumType] = arrayHandler;
}
else
{
_byNpgsqlDbType[NpgsqlDbType.Array | elementHandler.NpgsqlDbType] = arrayHandler;
}
}
void ActivateEnumType(TypeHandler handler, BackendType backendType)
{
handler.PgName = backendType.Name;
handler.OID = backendType.OID;
handler.NpgsqlDbType = NpgsqlDbType.Enum;
_oidIndex[backendType.OID] = handler;
_byType[handler.GetFieldType()] = handler;
if (backendType.ArrayOID != 0)
{
var arrayHandler = RegisterArrayType(backendType.ArrayOID, handler, backendType.ArrayTextDelimiter);
if (_byEnumTypeAsArray == null)
{
_byEnumTypeAsArray = new Dictionary <Type, TypeHandler>();
}
var enumType = handler.GetType().GetGenericArguments()[0];
Contract.Assert(enumType.IsEnum);
_byEnumTypeAsArray[enumType] = arrayHandler;
}
}
void RegisterRangeType(BackendType backendType)
{
Contract.Requires(backendType.Element != null);
TypeHandler elementHandler;
if (!_oidIndex.TryGetValue(backendType.Element.OID, out elementHandler))
{
// Range type referring to an unhandled element type
return;
}
var rangeHandlerType = typeof(RangeHandler <>).MakeGenericType(elementHandler.GetFieldType());
var handler = (TypeHandler)Activator.CreateInstance(rangeHandlerType, elementHandler, backendType.Name);
handler.PgName = backendType.Name;
handler.NpgsqlDbType = NpgsqlDbType.Range | elementHandler.NpgsqlDbType;
handler.OID = backendType.OID;
_oidIndex[backendType.OID] = handler;
_byNpgsqlDbType.Add(handler.NpgsqlDbType, handler);
}
static List <BackendType> LoadBackendTypes(NpgsqlConnector connector)
{
var byOID = new Dictionary <uint, BackendType>();
// Select all types (base, array which is also base, enum, range). Note that arrays are distinguished
// from primitive types through them having typelem != 0 and typlen == -1.
// Order by primitives first, container later.
// For arrays and ranges, join in the element OID and type (to filter out arrays of unhandled
// types).
var query =
@"SELECT a.typname, a.oid, a.typtype, a.typlen, CASE " +
(connector.SupportsRangeTypes ? @"WHEN a.typtype='r' THEN rngsubtype " : "") +
@"WHEN a.typlen = -1 THEN a.typelem ELSE 0 END AS ord " +
@"FROM pg_type AS a " +
@"LEFT OUTER JOIN pg_type AS b ON (b.oid = a.typelem) " +
(connector.SupportsRangeTypes ? @"LEFT OUTER JOIN pg_range ON (pg_range.rngtypid = a.oid) " : "") +
@"WHERE a.typtype IN ('b', 'r', 'e') AND (b.typtype IS NULL OR b.typtype IN ('b', 'r', 'e'))" +
@"ORDER BY ord";
var types = new List <BackendType>();
using (var command = new NpgsqlCommand(query, connector))
{
command.AllResultTypesAreUnknown = true;
using (var dr = command.ExecuteReader(CommandBehavior.SequentialAccess))
{
while (dr.Read())
{
var backendType = new BackendType
{
Name = dr.GetString(0),
OID = Convert.ToUInt32(dr[1])
};
Contract.Assume(backendType.Name != null);
Contract.Assume(backendType.OID != 0);
uint elementOID;
var typeChar = dr.GetString(2)[0];
switch (typeChar)
{
case 'b':
// We can't use pg_type.typarray to identify array types because that appeared only in PG 8.3.
// But "True" arrays have typelem != 0 and typlen == -1
var typeLen = Convert.ToInt16(dr[3]);
elementOID = Convert.ToUInt32(dr[4]);
if (elementOID != 0 && typeLen == -1)
{
backendType.Type = BackendTypeType.Array;
if (!byOID.TryGetValue(elementOID, out backendType.Element))
{
Log.ErrorFormat("Array type '{0}' refers to unknown element with OID {1}, skipping", backendType.Name, elementOID);
continue;
}
backendType.Element.Array = backendType;
}
else
{
backendType.Type = BackendTypeType.Base;
}
break;
case 'e':
backendType.Type = BackendTypeType.Enum;
break;
case 'r':
backendType.Type = BackendTypeType.Range;
elementOID = Convert.ToUInt32(dr[4]);
if (!byOID.TryGetValue(elementOID, out backendType.Element))
{
Log.ErrorFormat("Range type '{0}' refers to unknown subtype with OID {1}, skipping", backendType.Name, elementOID);
continue;
}
break;
default:
throw new ArgumentOutOfRangeException(String.Format("Unknown typtype for type '{0}' in pg_type: {1}", backendType.Name, typeChar));
}
types.Add(backendType);
byOID[backendType.OID] = backendType;
}
}
}
/*foreach (var notFound in _typeHandlers.Where(t => t.Oid == -1)) {
* _log.WarnFormat("Could not find type {0} in pg_type", notFound.PgNames[0]);
* }*/
return(types);
}
static List <BackendType> LoadBackendTypes(NpgsqlConnector connector)
{
var byOID = new Dictionary <uint, BackendType>();
// Select all types (base, array which is also base, enum, range).
// Note that arrays are distinguished from primitive types through them having typreceive=array_recv.
// Order by primitives first, container later.
// For arrays and ranges, join in the element OID and type (to filter out arrays of unhandled
// types).
var query =
@"SELECT a.typname, a.oid, " +
@"CASE WHEN pg_proc.proname='array_recv' THEN 'a' ELSE a.typtype END AS type, " +
@"CASE " +
@"WHEN pg_proc.proname='array_recv' THEN a.typelem " +
(connector.SupportsRangeTypes ? @"WHEN a.typtype='r' THEN rngsubtype " : "") +
@"ELSE 0 " +
@"END AS elemoid, " +
@"CASE " +
@"WHEN pg_proc.proname IN ('array_recv','oidvectorrecv') THEN 2 " + // Arrays last
@"WHEN a.typtype='r' THEN 1 " + // Ranges before
@"ELSE 0 " + // Base types first
@"END AS ord " +
@"FROM pg_type AS a " +
@"JOIN pg_proc ON pg_proc.oid = a.typreceive " +
@"LEFT OUTER JOIN pg_type AS b ON (b.oid = a.typelem) " +
(connector.SupportsRangeTypes ? @"LEFT OUTER JOIN pg_range ON (pg_range.rngtypid = a.oid) " : "") +
@"WHERE a.typtype IN ('b', 'r', 'e') AND (b.typtype IS NULL OR b.typtype IN ('b', 'r', 'e')) " +
@"ORDER BY ord";
var types = new List <BackendType>();
using (var command = new NpgsqlCommand(query, connector.Connection))
{
command.AllResultTypesAreUnknown = true;
using (var dr = command.ExecuteReader(CommandBehavior.SequentialAccess))
{
while (dr.Read())
{
var backendType = new BackendType
{
Name = dr.GetString(0),
OID = Convert.ToUInt32(dr[1])
};
Contract.Assume(backendType.Name != null);
Contract.Assume(backendType.OID != 0);
uint elementOID;
var typeChar = dr.GetString(2)[0];
switch (typeChar)
{
case 'b': // Normal base type
backendType.Type = BackendTypeType.Base;
break;
case 'a': // Array
backendType.Type = BackendTypeType.Array;
elementOID = Convert.ToUInt32(dr[3]);
Contract.Assume(elementOID > 0);
if (!byOID.TryGetValue(elementOID, out backendType.Element))
{
Log.Trace(string.Format("Array type '{0}' refers to unknown element with OID {1}, skipping", backendType.Name, elementOID), connector.Id);
continue;
}
backendType.Element.Array = backendType;
break;
case 'e': // Enum
backendType.Type = BackendTypeType.Enum;
break;
case 'r': // Range
backendType.Type = BackendTypeType.Range;
elementOID = Convert.ToUInt32(dr[3]);
Contract.Assume(elementOID > 0);
if (!byOID.TryGetValue(elementOID, out backendType.Element))
{
Log.Error(String.Format("Range type '{0}' refers to unknown subtype with OID {1}, skipping", backendType.Name, elementOID), connector.Id);
continue;
}
break;
default:
throw new ArgumentOutOfRangeException(String.Format("Unknown typtype for type '{0}' in pg_type: {1}", backendType.Name, typeChar));
}
types.Add(backendType);
byOID[backendType.OID] = backendType;
}
}
}
/*foreach (var notFound in _typeHandlers.Where(t => t.Oid == -1)) {
* _log.WarnFormat("Could not find type {0} in pg_type", notFound.PgNames[0]);
* }*/
return(types);
}
