static T ReadTableIfExists <T>(TableEntryCollection tables, BinaryReader reader, T resultTable)
where T : TableEntry
{
TableEntry found;
if (tables.TryGetTable(resultTable.Name, out found))
{
//found table name
//check if we have read this table or not
if (found is UnreadTableEntry)
{
//set header before actal read
resultTable.Header = found.Header;
resultTable.LoadDataFrom(reader);
//then reaplce
tables.ReplaceTable(resultTable);
return(resultTable);
}
else
{
//we have read this table
throw new NotSupportedException();
}
}
//not found
return(null);
}
/// <summary>
/// read table if exists
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="tableName"></param>
/// <param name="tables"></param>
/// <param name="reader"></param>
/// <param name="newTableDel"></param>
/// <returns></returns>
public T Read <T>(T resultTable) where T : TableEntry
{
if (_tables.TryGetTable(resultTable.Name, out TableEntry found))
{
//found table name
//check if we have read this table or not
if (found is UnreadTableEntry unreadTableEntry)
{
//set header before actal read
resultTable.Header = found.Header;
if (unreadTableEntry.HasCustomContentReader)
{
resultTable = unreadTableEntry.CreateTableEntry(_input, resultTable);
}
else
{
resultTable.LoadDataFrom(_input);
}
//then replace
_tables.ReplaceTable(resultTable);
return(resultTable);
}
else
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("this table is already loaded");
if (!(found is T))
{
throw new NotSupportedException();
}
#endif
return(found as T);
}
}
//not found
return(null);
}