public RecordSet(string Directory, string Name, Schema S, long MaxRecords)
: this(S)
{
this.MaxRecords = MaxRecords;
Header h = new Header(Directory, Name, 0, this, HeaderType.Table);
this.Attach(h);
BinarySerializer.FlushRecordSet(this);
}
// Constructor //
public RecordSet(Schema NewColumns, Header NewHeader, List<Record> NewCache, Key NewOrderBy)
{
this._Columns = NewColumns;
this._Cache = NewCache;
this._OrderBy = NewOrderBy;
this._Head = NewHeader;
if (NewHeader != null)
{
this._MaxRecordCount = NewHeader.MaxRecordCount;
this._GhostName = NewHeader.Name;
}
else
{
this._MaxRecordCount = EstimateMaxRecords(NewColumns);
this._GhostName = "CHUNK";
}
}
public static KeyValueSet Open(Header h, FNodeSet Fields, AggregateSet CR)
{
RecordSet rs = BinarySerializer.BufferRecordSet(h.Path);
KeyValueSet gbs = new KeyValueSet(Fields, CR);
gbs.ImportFromInterim(rs);
return gbs;
}
public static void Save(Header H, KeyValueSet Data)
{
RecordSet rs = Data.ToInterim();
rs.Attach(H);
BinarySerializer.FlushRecordSet(rs);
}
// Statics //
public static string FilePath(string Dir, string Name, HeaderType Type)
{
Header h = new Header(Dir.Trim(), Name.Trim(), 0, 0, 0, 0, 0, Type);
return h.Path;
}
private static RecordSet ReadRecordSet(BinaryReader Reader)
{
/*
* Read:
* Header
* Schema
* SortKey
* Record Collection
*/
// Read header //
Header h = new Header(BinarySerializer.ReadRecord(Reader, 10));
// Read schema //
Schema s = new Schema(BinarySerializer.ReadRecords(Reader, h.ColumnCount, 4));
// Read key //
Key k = new Key(BinarySerializer.ReadRecord(Reader, (int)h.KeyCount));
// Read record cache //
List<Record> l = BinarySerializer.ReadRecords(Reader, h.RecordCount, s.Count);
// Return recordset //
return new RecordSet(s, h, l, k);
}
public static RecordSet BufferRecordSet(Header H)
{
return BufferRecordSet(H.Path);
}
private static RecordSet ReadRecordSetSafe2(byte[] Mem, int Location)
{
/*
* Read:
* Header
* Schema
* SortKey
* Record Collection
*/
// Read header //
Record rh;
Location = ReadRecordSafe2(Mem, Location, 10, out rh);
Header h = new Header(rh);
// Read schema //
List<Record> s_cache = new List<Record>();
Location = BinarySerializer.ReadRecordsSafe2(Mem, Location, h.ColumnCount, 4, s_cache);
Schema s = new Schema(s_cache);
// Read key //
Record rk;
Location = ReadRecordSafe2(Mem, Location, (int)h.KeyCount, out rk);
Key k = new Key(rk);
// Read record cache //
List<Record> d_cache = new List<Record>();
Location = BinarySerializer.ReadRecordsSafe2(Mem, Location, (int)h.RecordCount, (int)h.ColumnCount, d_cache);
// Return recordset //
return new RecordSet(s, h, d_cache, k);
}
public SmallIndexSet(string SinkDir, DataSet Data, Key K)
: this(Data, K)
{
Header h = new Header(SinkDir, Header.TempName(), 0, this, HeaderType.Table);
this.Attach(h);
}
public static void RenameRecordSet(Header H, string NewName)
{
RenameRecordSet(H.Path, NewName);
}
public static void DropRecordSet(Header H)
{
DropRecordSet(H.Path);
}
public static bool Exists(Header Data)
{
return Exists(Data.Path);
}
public RecordSet(string ColumnText, Header NewHeader)
: this(new Schema(ColumnText), NewHeader)
{
}
public RecordSet(Schema NewColumns, Header NewHeader)
: this(NewColumns, NewHeader, new List<Record>(), new Key())
{
}
internal void Attach(Header Meta)
{
this._Head = Meta;
}
