/// <inheritdoc />
public IEnumerable <Edge> AllWhere(Edge edge)
{
var index = this.IndexCoverage.SelectIndex(edge);
IEnumerable <Edge> result;
if (index.Item1 == IndexCoverage.None)
{
result = _edges;
}
else
{
IReadOnlyCollection <Edge> r;
if (_index.TryGetValue(IndexKey.Create(edge, index.Item1.ToMask()), out r))
{
result = r;
}
else
{
result = Array.Empty <Edge>();
}
}
if (index.Item2 != TripleMask.None)
{
result = result.Where(t => edge.EqualsWithMask(t, index.Item2));
}
return(result);
}
/// <summary>
/// </summary>
/// <param name="triple"></param>
private void RemoveFromIndex(Edge triple)
{
Contract.Requires(triple != null);
foreach (var index in _indexes)
{
_index.Remove(IndexKey.Create(triple, index.ToMask()), triple);
}
}