public RelationAdvancedOrderedEnumerator(RelationDBManipulator <TValue> manipulator,
ByteBuffer prefixBytes, uint prefixFieldCount,
EnumerationOrder order,
KeyProposition startKeyProposition, ByteBuffer startKeyBytes,
KeyProposition endKeyProposition, ByteBuffer endKeyBytes, bool initKeyReader = true)
{
_prefixFieldCount = prefixFieldCount;
_manipulator = manipulator;
_tr = manipulator.Transaction;
_ascending = order == EnumerationOrder.Ascending;
_keyValueTr = _tr.KeyValueDBTransaction;
_keyValueTrProtector = _tr.TransactionProtector;
_prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
_keyBytes = prefixBytes;
_keyValueTr.SetKeyPrefix(_keyBytes);
long startIndex;
long endIndex;
if (endKeyProposition == KeyProposition.Ignored)
{
endIndex = _keyValueTr.GetKeyValueCount() - 1;
}
else
{
switch (_keyValueTr.Find(endKeyBytes))
{
case FindResult.Exact:
endIndex = _keyValueTr.GetKeyIndex();
if (endKeyProposition == KeyProposition.Excluded)
{
endIndex--;
}
break;
case FindResult.Previous:
endIndex = _keyValueTr.GetKeyIndex();
break;
case FindResult.Next:
endIndex = _keyValueTr.GetKeyIndex() - 1;
break;
case FindResult.NotFound:
endIndex = -1;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (startKeyProposition == KeyProposition.Ignored)
{
startIndex = 0;
}
else
{
switch (_keyValueTr.Find(startKeyBytes))
{
case FindResult.Exact:
startIndex = _keyValueTr.GetKeyIndex();
if (startKeyProposition == KeyProposition.Excluded)
{
startIndex++;
}
break;
case FindResult.Previous:
startIndex = _keyValueTr.GetKeyIndex() + 1;
break;
case FindResult.Next:
startIndex = _keyValueTr.GetKeyIndex();
break;
case FindResult.NotFound:
startIndex = 0;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
_count = (uint)Math.Max(0, endIndex - startIndex + 1);
_startPos = (uint)(_ascending ? startIndex : endIndex);
_pos = 0;
_seekNeeded = true;
if (initKeyReader)
{
var primaryKeyFields = manipulator.RelationInfo.ClientRelationVersionInfo.GetPrimaryKeyFields();
var advancedEnumParamField = primaryKeyFields.ToList()[(int)_prefixFieldCount];
if (advancedEnumParamField.Handler.NeedsCtx())
{
throw new BTDBException("Not supported.");
}
_keyReader = (Func <AbstractBufferedReader, IReaderCtx, TKey>)manipulator.RelationInfo
.GetSimpleLoader(new RelationInfo.SimpleLoaderType(advancedEnumParamField.Handler, typeof(TKey)));
_lengthOfNonDataPrefix = ObjectDB.AllRelationsPKPrefix.Length + PackUnpack.LengthVUInt(manipulator.RelationInfo.Id);
}
}
public RelationAdvancedOrderedSecondaryKeyEnumerator(RelationDBManipulator <TValue> manipulator,
ByteBuffer prefixBytes, uint prefixFieldCount, EnumerationOrder order,
KeyProposition startKeyProposition, ByteBuffer startKeyBytes,
KeyProposition endKeyProposition, ByteBuffer endKeyBytes,
uint secondaryKeyIndex)
: base(manipulator, prefixBytes, prefixFieldCount, order,
startKeyProposition, startKeyBytes,
endKeyProposition, endKeyBytes, false)
{
_secondaryKeyIndex = secondaryKeyIndex;
var secKeyFields = manipulator.RelationInfo.ClientRelationVersionInfo.GetSecondaryKeyFields(secondaryKeyIndex);
var advancedEnumParamField = secKeyFields.ToList()[(int)_prefixFieldCount];
if (advancedEnumParamField.Handler.NeedsCtx())
{
throw new BTDBException("Not supported.");
}
_keyReader = (Func <AbstractBufferedReader, IReaderCtx, TKey>)manipulator.RelationInfo
.GetSimpleLoader(new RelationInfo.SimpleLoaderType(advancedEnumParamField.Handler, typeof(TKey)));
}
public RelationAdvancedEnumerator(
RelationDBManipulator <T> manipulator,
ByteBuffer prefixBytes, uint prefixFieldCount,
EnumerationOrder order,
KeyProposition startKeyProposition, ByteBuffer startKeyBytes,
KeyProposition endKeyProposition, ByteBuffer endKeyBytes)
{
_prefixFieldCount = prefixFieldCount;
_manipulator = manipulator;
_ascending = order == EnumerationOrder.Ascending;
_tr = manipulator.Transaction;
_keyValueTr = _tr.KeyValueDBTransaction;
_keyValueTrProtector = _tr.TransactionProtector;
_prevProtectionCounter = _keyValueTrProtector.ProtectionCounter;
_keyBytes = prefixBytes;
_keyValueTr.SetKeyPrefix(_keyBytes);
_relationInfo = manipulator.RelationInfo;
_prevModificationCounter = _relationInfo.ModificationCounter;
long startIndex;
long endIndex;
if (endKeyProposition == KeyProposition.Ignored)
{
endIndex = _keyValueTr.GetKeyValueCount() - 1;
}
else
{
switch (_keyValueTr.Find(endKeyBytes))
{
case FindResult.Exact:
endIndex = _keyValueTr.GetKeyIndex();
if (endKeyProposition == KeyProposition.Excluded)
{
endIndex--;
}
break;
case FindResult.Previous:
endIndex = _keyValueTr.GetKeyIndex();
break;
case FindResult.Next:
endIndex = _keyValueTr.GetKeyIndex() - 1;
break;
case FindResult.NotFound:
endIndex = -1;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (startKeyProposition == KeyProposition.Ignored)
{
startIndex = 0;
}
else
{
switch (_keyValueTr.Find(startKeyBytes))
{
case FindResult.Exact:
startIndex = _keyValueTr.GetKeyIndex();
if (startKeyProposition == KeyProposition.Excluded)
{
startIndex++;
}
break;
case FindResult.Previous:
startIndex = _keyValueTr.GetKeyIndex() + 1;
break;
case FindResult.Next:
startIndex = _keyValueTr.GetKeyIndex();
break;
case FindResult.NotFound:
startIndex = 0;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
_count = (uint)Math.Max(0, endIndex - startIndex + 1);
_startPos = (uint)(_ascending ? startIndex : endIndex);
_pos = 0;
_seekNeeded = true;
_lengthOfNonDataPrefix = ObjectDB.AllRelationsPKPrefix.Length + PackUnpack.LengthVUInt(manipulator.RelationInfo.Id);
}
public IAsyncEnumerable <IRow> Enumerate(ReadOnlyMemory <byte> startsWith, EnumerationOrder order = EnumerationOrder.Ordered)
{
return(new DeferredAsyncEnumerable(GetTrie(), t => t.EnumerateStartsWith(startsWith, order)));
}
public IAsyncEnumerable <IRow> Enumerate(string?startsWith = null, EnumerationOrder order = EnumerationOrder.Ordered)
{
return(new DeferredAsyncEnumerable(GetTrie(), t => t.EnumerateStartsWith(startsWith ?? string.Empty, order)));
}
public AdvancedEnumeratorParam(EnumerationOrder order)
{
Order = order;
StartProposition = KeyProposition.Ignored;
EndProposition = KeyProposition.Ignored;
}
public double[] As1DArray(EnumerationOrder order = EnumerationOrder.ByRow)
{
switch (order)
{
case EnumerationOrder.ByColumn:
return _enumerateByColumn();
case EnumerationOrder.ByRow:
return _enumerateByRow();
default:
throw new NotSupportedException();
}
}
/// <summary>
/// Construct a matrix from a 1 Dimensional array either building row by row, or column by column.
/// </summary>
public Matrix(double[] array, int numRows, int numCols, EnumerationOrder order = EnumerationOrder.ByColumn)
{
this._matrix = DenseMatrix.OfColumnMajor(numRows, numCols, array);
if (order == EnumerationOrder.ByRow)
{
this._matrix = _matrix.Transpose();
}
}
