public static JComparer Create(List <KeyAndType> keyAndTypes)
{
if (keyAndTypes == null || keyAndTypes.Count == 0)
{
return(new JComparer());
}
switch (keyAndTypes.Count)
{
case 1: return(Create(keyAndTypes[0]));
case 2: return(new Comparer2(Create(keyAndTypes[0]), Create(keyAndTypes[1])));
default:
var comparers = new Comparer1Base[keyAndTypes.Count];
for (int i = 0; i < keyAndTypes.Count; i++)
{
comparers[i] = Create(keyAndTypes[i]);
}
return(new ComparerN(comparers));
}
}
public override JComparer Clone(int numComparers)
{
int toKeep = numComparers;
if (numComparers < 0)
{
toKeep += 2;
}
switch (toKeep)
{
case 0: return(new JComparer());
case 1: return(cmps[0]);
}
if (toKeep > 0 && toKeep < cmps.Length)
{
Comparer1Base[] ret = new Comparer1Base[toKeep];
Array.Copy(cmps, ret, toKeep);
return(new ComparerN(ret));
}
throw new BMException("Invalid resulting #sub-comparers: {0}. #comparers={1}, numComparers={2}.", toKeep, cmps.Length, numComparers);
}
public Comparer2(Comparer1Base cmp1, Comparer1Base cmp2)
{
this.cmp1 = cmp1;
this.cmp2 = cmp2;
}
