private bool WriteItem(NpgsqlNativeTypeInfo TypeInfo, object item, StringBuilder sb, Boolean ForExtendedQuery)
{
//item could be:
//an Ienumerable - in which case we call WriteEnumeration
//an element - in which case we call the NpgsqlNativeTypeInfo for that type to serialise it.
//an array - in which case we call WriteArray,
// Even an string being an IEnumerable, it shouldn't be processed. It will be processed on the last else.
// See http://pgfoundry.org/tracker/?func=detail&atid=592&aid=1010514&group_id=1000140 for more info.
if (item == null || NpgsqlTypesHelper.DefinedType(item))
{
sb.Append(_elementConverter.ConvertToBackend(item, ForExtendedQuery));
return(true);
}
else if (item is Array)
{
return(WriteArray(TypeInfo, item as Array, sb, ForExtendedQuery));
}
else if (item is IEnumerable)
{
return(WriteEnumeration(TypeInfo, item as IEnumerable, sb, ForExtendedQuery));
}
else
{//This shouldn't really be reachable.
sb.Append(_elementConverter.ConvertToBackend(item, ForExtendedQuery));
return(true);
}
}
/// <summary>
/// Check if Npgsql support .NET type conversion to Postgres type
/// </summary>
public static bool CanConvert(Type type)
{
NpgsqlNativeTypeInfo info;
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
return(NpgsqlTypesHelper.TryGetNativeTypeInfo(type.GetGenericArguments()[0], out info));
}
return(NpgsqlTypesHelper.TryGetNativeTypeInfo(type, out info));
}
/// <summary>
/// Convert Postgres type name for .NET type
/// </summary>
public static string GetTypeName(Type type)
{
NpgsqlNativeTypeInfo info;
bool canConvert;
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
canConvert = NpgsqlTypesHelper.TryGetNativeTypeInfo(type.GetGenericArguments()[0], out info);
}
else
{
canConvert = NpgsqlTypesHelper.TryGetNativeTypeInfo(type, out info);
}
if (!canConvert)
{
throw new NpgsqlException("Can't convert " + type.FullName + " to native value");
}
return(info.Name);
}
private bool WriteItemText(NpgsqlNativeTypeInfo TypeInfo, object item, MemoryStream array, Boolean forExtendedQuery, NativeToBackendTypeConverterOptions options)
{
//item could be:
//an Ienumerable - in which case we call WriteEnumeration
//an element - in which case we call the NpgsqlNativeTypeInfo for that type to serialise it.
//an array - in which case we call WriteArray,
// Even an string being an IEnumerable, it shouldn't be processed. It will be processed on the last else.
// See http://pgfoundry.org/tracker/?func=detail&atid=592&aid=1010514&group_id=1000140 for more info.
if (item == null || NpgsqlTypesHelper.DefinedType(item))
{
byte[] element;
element = _elementConverter.ConvertToBackend(item, forExtendedQuery, options, true);
array.Write(element, 0, element.Length);
return(true);
}
else if (item is Array)
{
return(WriteArrayText(TypeInfo, item as Array, array, forExtendedQuery, options));
}
else if (item is IEnumerable)
{
return(WriteEnumeration(TypeInfo, item as IEnumerable, array, forExtendedQuery, options));
}
else
{//This shouldn't really be reachable.
byte[] element;
element = _elementConverter.ConvertToBackend(item, forExtendedQuery, options, true);
array.Write(element, 0, element.Length);
return(true);
}
}
/// <summary>
/// Convert .NET type to Postgres string representation
/// </summary>
public static string Convert(Type type, object value)
{
NpgsqlNativeTypeInfo info;
bool canConvert;
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
canConvert = NpgsqlTypesHelper.TryGetNativeTypeInfo(type.GetGenericArguments()[0], out info);
}
else
{
if (type == typeof(string) && value != null)
{
return("'" + (value as string).Replace("'", "''") + "'");
}
canConvert = NpgsqlTypesHelper.TryGetNativeTypeInfo(type, out info);
}
if (!canConvert)
{
throw new NpgsqlException("Can't convert " + type.FullName + " to native value");
}
return(info.ConvertToBackend(value, false));
}
