public override IEnumerable<long> GetSingleIndexValues(ISingleValueIndex<IComparable, long> mySingleValueIndex, IComparable myIComparable)
{
return mySingleValueIndex.Where(kv => kv.Key.CompareTo(myIComparable) != 0).Select(kv => kv.Value);
}
public override IEnumerable<long> GetSingleIndexValues(ISingleValueIndex<IComparable, long> mySingleValueIndex, IComparable myIComparable)
{
if (mySingleValueIndex is IRangeIndex<IComparable, long>)
{
//use the range funtionality
foreach (var aVertexID in ((ISingleValueRangeIndex<IComparable, long>)mySingleValueIndex).LowerThan(myIComparable, false))
{
yield return aVertexID;
}
}
else
{
//stupid, but works
foreach (var aVertexID in mySingleValueIndex.Where(kv => kv.Key.CompareTo(myIComparable) < 0).Select(kv => kv.Value))
{
yield return aVertexID;
}
}
yield break;
}
/// <summary>
/// Extract values from a single value index
/// </summary>
/// <param name="mySingleValueIndex">The interesting index</param>
/// <param name="myConstant">The interesting range</param>
/// <returns>An enumerable of vertexIDs</returns>
private IEnumerable<long> GetSingleIndexValues(ISingleValueIndex<IComparable, long> mySingleValueIndex, RangeLiteralExpression myConstant)
{
if (mySingleValueIndex is IRangeIndex<IComparable, long>)
{
//use the range funtionality
foreach (var aVertexID in ((ISingleValueRangeIndex<IComparable, long>)mySingleValueIndex)
.InRange(myConstant.Lower, myConstant.Upper, myConstant.IncludeBorders, myConstant.IncludeBorders))
{
yield return aVertexID;
}
}
else
{
//stupid, but works
if (myConstant.IncludeBorders)
{
foreach (var aVertexID in mySingleValueIndex
.Where(kv =>
(kv.Key.CompareTo(myConstant.Lower) >= 0) &&
(kv.Key.CompareTo(myConstant.Upper) <= 0))
.Select(kv => kv.Value))
{
yield return aVertexID;
}
}
else
{
foreach (var aVertexID in mySingleValueIndex
.Where(kv =>
(kv.Key.CompareTo(myConstant.Lower) > 0) &&
(kv.Key.CompareTo(myConstant.Upper) < 0))
.Select(kv => kv.Value))
{
yield return aVertexID;
}
}
}
yield break;
}
