protected internal sealed override object ConvertValue(object value)
{
// can not convert null or DbNull to other types
if (value == null || value == DBNull.Value)
{
return(value);
}
// FIXME : some other way to do this?
if (OleDbType == OleDbType.Binary)
{
return(value);
}
// .NET throws an exception to the user.
object convertedValue = value;
// note : if we set user parameter jdbc type inside prepare interbal, the db type is not set
if (value is IConvertible && (IsDbTypeSet || IsJdbcTypeSet))
{
OleDbType oleDbType = (IsDbTypeSet) ? OleDbType : OleDbConvert.JdbcTypeToOleDbType((int)JdbcType);
Type to = OleDbConvert.OleDbTypeToValueType(oleDbType);
if (!(value is DateTime && to == DbTypes.TypeOfTimespan)) //anyway will go by jdbc type
{
convertedValue = Convert.ChangeType(value, to);
}
}
return(convertedValue);
}
protected internal sealed override void SetParameterDbType(ResultSet res)
{
int jdbcType = res.getInt("DATA_TYPE");
// FIXME : is that correct?
if (jdbcType == Types.OTHER)
{
string typeName = res.getString("TYPE_NAME");
if (String.Compare("BLOB", typeName, true, CultureInfo.InvariantCulture) == 0)
{
jdbcType = Types.BLOB;
}
else if (String.Compare("CLOB", typeName, true, CultureInfo.InvariantCulture) == 0)
{
jdbcType = Types.CLOB;
}
else if (String.Compare("FLOAT", typeName, true, CultureInfo.InvariantCulture) == 0)
{
jdbcType = Types.FLOAT;
}
else if (String.Compare("NVARCHAR2", typeName, true, CultureInfo.InvariantCulture) == 0)
{
jdbcType = Types.VARCHAR;
}
else if (String.Compare("NCHAR", typeName, true, CultureInfo.InvariantCulture) == 0)
{
jdbcType = Types.VARCHAR;
}
}
OleDbType = OleDbConvert.JdbcTypeToOleDbType(jdbcType);
JdbcType = jdbcType;
}
protected override int GetProviderType(int jdbcType)
{
return((int)OleDbConvert.JdbcTypeToOleDbType(jdbcType));
}