/**
* @return never <c>null</c>, (possibly empty) array of all cells directly used while
* evaluating the formula of this frame.
*/
private CellCacheEntry[] GetSensitiveInputCells()
{
int nItems = _sensitiveInputCells.Count;
if (nItems < 1)
{
return CellCacheEntry.EMPTY_ARRAY;
}
CellCacheEntry[] result = new CellCacheEntry[nItems];
result = (CellCacheEntry[])_sensitiveInputCells.ToArray(typeof(CellCacheEntry));
return result;
}
public void Add(CellCacheEntry cce)
{
if (_size * 3 >= _arr.Length * 2)
{
// re-Hash
FormulaCellCacheEntry[] prevArr = _arr;
FormulaCellCacheEntry[] newArr = new FormulaCellCacheEntry[4 + _arr.Length * 3 / 2]; // grow 50%
for (int i = 0; i < prevArr.Length; i++)
{
FormulaCellCacheEntry prevCce = _arr[i];
if (prevCce != null)
{
AddInternal(newArr, prevCce);
}
}
_arr = newArr;
}
if (AddInternal(_arr, cce))
{
_size++;
}
}
public void AcceptFormulaDependency(CellCacheEntry cce)
{
// Tell the currently evaluating cell frame that it Has a dependency on the specified
int prevFrameIndex = _evaluationFrames.Count - 1;
if (prevFrameIndex < 0)
{
// Top level frame, there is no 'cell' above this frame that is using the current cell
}
else
{
CellEvaluationFrame consumingFrame = (CellEvaluationFrame)_evaluationFrames[prevFrameIndex];
consumingFrame.AddSensitiveInputCell(cce);
}
}
/**
* Notifies this evaluation tracker that the evaluation of the specified cell is complete. <p/>
*
* Every successful call To <c>startEvaluate</c> must be followed by a call To <c>endEvaluate</c> (recommended in a finally block) To enable
* proper tracking of which cells are being evaluated at any point in time.<p/>
*
* Assuming a well behaved client, parameters To this method would not be
* required. However, they have been included To assert correct behaviour,
* and form more meaningful error messages.
*/
public void EndEvaluate(CellCacheEntry cce)
{
int nFrames = _evaluationFrames.Count;
if (nFrames < 1)
{
throw new InvalidOperationException("Call To endEvaluate without matching call To startEvaluate");
}
nFrames--;
CellEvaluationFrame frame = (CellEvaluationFrame)_evaluationFrames[nFrames];
if (cce != frame.GetCCE())
{
throw new InvalidOperationException("Wrong cell specified. ");
}
// else - no problems so pop current frame
_evaluationFrames.RemoveAt(nFrames);
_currentlyEvaluatingCells.Remove(cce);
}
private static bool AddInternal(CellCacheEntry[] arr, CellCacheEntry cce)
{
int startIx = cce.GetHashCode() % arr.Length;
for (int i = startIx; i < arr.Length; i++)
{
CellCacheEntry item = arr[i];
if (item == cce)
{
// already present
return false;
}
if (item == null)
{
arr[i] = cce;
return true;
}
}
for (int i = 0; i < startIx; i++)
{
CellCacheEntry item = arr[i];
if (item == cce)
{
// already present
return false;
}
if (item == null)
{
arr[i] = cce;
return true;
}
}
throw new InvalidOperationException("No empty space found");
}
public bool Remove(CellCacheEntry cce)
{
FormulaCellCacheEntry[] arr = _arr;
if (_size * 3 < _arr.Length && _arr.Length > 8)
{
// re-Hash
bool found = false;
FormulaCellCacheEntry[] prevArr = _arr;
FormulaCellCacheEntry[] newArr = new FormulaCellCacheEntry[_arr.Length / 2]; // shrink 50%
for (int i = 0; i < prevArr.Length; i++)
{
FormulaCellCacheEntry prevCce = _arr[i];
if (prevCce != null)
{
if (prevCce == cce)
{
found = true;
_size--;
// skip it
continue;
}
AddInternal(newArr, prevCce);
}
}
_arr = newArr;
return found;
}
// else - usual case
// delete single element (without re-Hashing)
int startIx = cce.GetHashCode() % arr.Length;
// note - can't exit loops upon finding null because of potential previous deletes
for (int i = startIx; i < arr.Length; i++)
{
FormulaCellCacheEntry item = arr[i];
if (item == cce)
{
// found it
arr[i] = null;
_size--;
return true;
}
}
for (int i = 0; i < startIx; i++)
{
FormulaCellCacheEntry item = arr[i];
if (item == cce)
{
// found it
arr[i] = null;
_size--;
return true;
}
}
return false;
}
/**
* @param inputCell a cell directly used by the formula of this evaluation frame
*/
public void AddSensitiveInputCell(CellCacheEntry inputCell)
{
_sensitiveInputCells.Add(inputCell);
}