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);
}
public static Header Save(string Dir, KeyValueSet Data)
{
RecordSet rs = Data.ToInterim();
Header h = Header.TempHeader(Dir, rs);
rs.Attach(h);
BinarySerializer.FlushRecordSet(rs);
return h;
}
// Statics //
/// <summary>
/// Takes all the records from T2 and merges into T1; if the record exists in T1, then:
/// -- T1's record is updated
/// -- T2's record is deleted
/// Otherwise, if the record does not exist in T1, nothing happens
/// </summary>
/// <param name="T1"></param>
/// <param name="T2"></param>
public static void Union(KeyValueSet T1, KeyValueSet T2)
{
List<Record> Deletes = new List<Record>();
// Merge and tag deletes //
foreach (KeyValuePair<Record, CompoundRecord> t in T2._cache)
{
if (T1._cache.ContainsKey(t.Key))
{
T1.Merge(t.Key, t.Value);
Deletes.Add(t.Key);
}
}
// Clear deletes //
foreach (Record r in Deletes)
T2._cache.Remove(r);
}
// Methods //
public void Insert()
{
// If the cache is full, then dump to disk
if (this._Cache.IsFull)
{
// Create the interim data cache //
Header h = KeyValueSet.Save(this._TempDir, this._Cache);
this._Headers.Add(h);
// Create new record set //
this._Cache = new KeyValueSet(this._Cache.BaseMappers, this._Cache.BaseReducers);
}
// Add the record to the cache //
this._Cache.Add();
}
// Constructor //
public AggregateStructure(string TempDir, FNodeSet Fields, AggregateSet Aggregates, List<Header> Headers)
{
this._TempDir = TempDir;
this._Cache = new KeyValueSet(Fields, Aggregates);
this._Headers = new List<Header>();
this._keys = Fields;
this._aggregates = Aggregates;
}