/// <summary>
/// Overwrites a record. Used to update records. (or set the removed flag)
/// </summary>
/// <param name="mainFile">File stream of the dbset.</param>
/// <param name="customInfos">To compare.</param>
/// <param name="primitiveInfos">To compare.</param>
/// <param name="orderedInfos">The infos in the order of being written to the file.</param>
/// <param name="record">Record to be overwritten.</param>
public static void Overwrite(Stream mainFile, BaseClass record)
{
int indexToBeInserted = record.id;
mainFile.Position = record.RowSize() * (indexToBeInserted - 1); //gerekirse düzelt
BinaryWriter bw = new BinaryWriter(mainFile);
foreach (PropertyInfo info in record.OrderedInfos())
{
if (record.PrimitiveInfos().Contains(info))
{
WriteSingleProperty(bw, info, info.GetValue(record));
}
else if (info.PropertyType.IsGenericType)
{
continue;
}
else
{
BaseClass child = (BaseClass)info.GetValue(record);
if (child == null)
{
bw.Write(-1);
}
else
{
bw.Write(child.id);
}
}
}
}
/// <summary>
/// Inserts a record for the first time. Returns the id of last inserted record
/// </summary>
/// <param name="mainFile">Stream of the file, that holds the data for the DbSet of the record</param>
/// <param name="removedIndexes">Empty index numbers in the file, can be filled with new records</param>
/// <param name="infos">Properties that will be stored in database. (To exclude notmapped properties)</param>
/// <param name="record">Record to be inserted</param>
/// <returns>Returns the id of last inserted record</returns>
public static int Add(Stream mainFile, List <int> removedIndexes, BaseClass record)
{
int indexToBeInserted = -1;
if (removedIndexes.Count() > 0)
{
indexToBeInserted = removedIndexes[0];
Overwrite(mainFile, record);
return(indexToBeInserted);
}
mainFile.Position = (mainFile.Length / record.RowSize()) * ((indexToBeInserted == -1) ? record.RowSize() : indexToBeInserted); //
indexToBeInserted = Convert.ToInt32(mainFile.Position / record.RowSize()) + 1; //idler 1den başlasın
BinaryWriter bw = new BinaryWriter(mainFile);
foreach (PropertyInfo info in record.OrderedInfos())
{
if (record.PrimitiveInfos().Contains(info))
{
if (info.Name == "id")
{
WriteSingleProperty(bw, info, indexToBeInserted);
}
else
{
WriteSingleProperty(bw, info, info.GetValue(record));
}
}
else if (record.OTORelInfos().Contains(info))
{
BaseClass child = (BaseClass)info.GetValue(record);
if (child == null)
{
bw.Write(-1);
}
else
{
bw.Write(child.id);
}
}
//one to many ise burada iş yok, dbset'te request yapılacak.
}
return(indexToBeInserted);//id dönecek
}