internal static Stream GetStream(SmiEventSink_Default sink, ITypedGettersV3 getters, int ordinal, SmiMetaData metaData, bool bypassTypeCheck = false)
{
bool isDbNull = ValueUtilsSmi.IsDBNull_Unchecked(sink, getters, ordinal);
// If a sql_variant, get the internal type
if (!bypassTypeCheck)
{
if ((!isDbNull) && (metaData.SqlDbType == SqlDbType.Variant))
{
metaData = getters.GetVariantType(sink, ordinal);
}
// If the SqlDbType is still variant, then it must contain null, so don't throw InvalidCast
if ((metaData.SqlDbType != SqlDbType.Variant) && (!CanAccessGetterDirectly(metaData, ExtendedClrTypeCode.Stream)))
{
throw ADP.InvalidCast();
}
}
byte[] data;
if (isDbNull)
{
// "null" stream
data = new byte[0];
}
else
{
// Read all data
data = GetByteArray_Unchecked(sink, getters, ordinal);
}
// Wrap data in pre-built object
return(new MemoryStream(data, writable: false));
}
internal static TextReader GetTextReader(SmiEventSink_Default sink, ITypedGettersV3 getters, int ordinal, SmiMetaData metaData)
{
bool isDbNull = ValueUtilsSmi.IsDBNull_Unchecked(sink, getters, ordinal);
// If a sql_variant, get the internal type
if ((!isDbNull) && (metaData.SqlDbType == SqlDbType.Variant))
{
metaData = getters.GetVariantType(sink, ordinal);
}
// If the SqlDbType is still variant, then it must contain null, so don't throw InvalidCast
if ((metaData.SqlDbType != SqlDbType.Variant) && (!CanAccessGetterDirectly(metaData, ExtendedClrTypeCode.TextReader)))
{
throw ADP.InvalidCast();
}
string data;
if (isDbNull)
{
// "null" textreader
data = string.Empty;
}
else
{
// Read all data
data = GetString_Unchecked(sink, getters, ordinal);
}
// Wrap in pre-built object
return(new StringReader(data));
}
internal static SqlSequentialTextReaderSmi GetSequentialTextReader(SmiEventSink_Default sink, ITypedGettersV3 getters, int ordinal, SmiMetaData metaData)
{
Debug.Assert(!ValueUtilsSmi.IsDBNull_Unchecked(sink, getters, ordinal), "Should not try to get a SqlSequentialTextReaderSmi on a null column");
ThrowIfITypedGettersIsNull(sink, getters, ordinal);
if (!CanAccessGetterDirectly(metaData, ExtendedClrTypeCode.TextReader))
{
throw ADP.InvalidCast();
}
// This will advance the column to ordinal
long length = GetCharsLength_Unchecked(sink, getters, ordinal);
return(new SqlSequentialTextReaderSmi(sink, getters, ordinal, length));
}
