public TestPair(DatabaseIndex probe, DatabaseIndex candidate)
{
Probe = probe;
Candidate = candidate;
}
public IEnumerable <TestPair> GetAllPairs(DatabaseIndex probe)
{
return(GetMatchingPairs(probe).Concat(GetNonMatchingPairs(probe)));
}
public View this[DatabaseIndex index]
{
get { return(Fingers[index.Finger].Views[index.View]); }
}
public IEnumerable <TestPair> GetNonMatchingPairs(DatabaseIndex probe)
{
return((from view in GetSelfAndConsequentViews(probe)
from candidate in GetConsequentFingers(view)
select new TestPair(probe, candidate)).Take(NonMatchingPerProbe));
}
public IEnumerable <DatabaseIndex> GetConsequentFingers(DatabaseIndex probe)
{
return(from offset in Enumerable.Range(1, FingerCount - 1)
select new DatabaseIndex((probe.Finger + offset) % FingerCount, probe.View));
}
public IEnumerable <TestPair> GetMatchingPairs(DatabaseIndex probe)
{
return((from candidate in GetConsequentViews(probe)
select new TestPair(probe, candidate)).Take(MatchingPerProbe));
}
public IEnumerable <DatabaseIndex> GetConsequentViews(DatabaseIndex probe)
{
return(GetSelfAndConsequentViews(probe).Skip(1));
}
public IEnumerable <DatabaseIndex> GetSelfAndConsequentViews(DatabaseIndex probe)
{
return(from offset in Enumerable.Range(0, ViewCount)
select new DatabaseIndex(probe.Finger, (probe.View + offset) % ViewCount));
}