public static bool Intersect(ComparatorSet <T> left, List <ComparatorSet <T> > right)
{
bool result = false;
right.ForEach(r => result |= Intersect(left, r));
return(result);
}
public static bool Intersect(ComparatorSet <T> cs1, ComparatorSet <T> cs2)
{
if (!ComparatorSetIsValidRange(cs1))
{
throw new ArgumentException("Invalid comparator set for range.", "cs1");
}
if (!ComparatorSetIsValidRange(cs2))
{
throw new ArgumentException("Invalid comparator set for range.", "cs2");
}
if (cs1.Count == 1 && cs2.Count == 1)
{
return(Intersect(cs1[0], cs2[0]));
}
else if (cs1.Count == 1 && cs2.Count == 2)
{
return(Satisfies(cs1[0].Version, cs2));
}
else if (cs1.Count == 2 && cs2.Count == 1)
{
return(Satisfies(cs2[0].Version, cs1));
}
else if (cs2.Count == 2 && cs2.Count == 2)
{
return(cs1.ToInterval().Intersect(cs2.ToInterval()));
}
else
{
throw new ArgumentOutOfRangeException("Can't convert comparator sets to range.");
}
}
public static bool ComparatorSetIsValidRange(ComparatorSet <T> cs)
{
if ((cs.Count == 1) && cs[0].Operator == ExpressionType.Equal)
{
return(true);
}
else if (cs.Count == 2)
{
foreach (Comparator <T> c in cs)
{
if (!ValidRangeOperators.Contains(c.Operator))
{
return(false);
}
}
return(true);
}
else
{
return(false);
}
}
public static BinaryExpression GetBinaryExpression(T left, ComparatorSet <T> right)
{
if (right.Count == 0)
{
return(GetBinaryExpression(ExpressionType.Equal, left, left));
}
else
{
BinaryExpression c = null;
foreach (Comparator <T> r in right)
{
if (c == null)
{
c = GetBinaryExpression(r.Operator, left, r.Version);
}
else
{
c = Expression.AndAlso(c, GetBinaryExpression(r.Operator, left, r.Version));
}
}
return(c);
}
}
public static bool Satisfies(T v, ComparatorSet <T> s)
{
return(InvokeBinaryExpression(GetBinaryExpression(v, s)));
}