/// <summary>
/// Compares two <see cref="IBasicLineString" /> instances and returns a value indicating whether one is less than, equal to, or greater than the other.
/// </summary>
/// <param name="x">The first <see cref="IBasicLineString" /> to compare.</param>
/// <param name="y">The second <see cref="IBasicLineString" /> to compare.</param>
/// <returns>A signed integer that indicates the relative values of <paramref name="x" /> and <paramref name="y" />.</returns>
/// <exception cref="System.ArgumentNullException">
/// The x argument is null.
/// or
/// The y argument is null.
/// </exception>
public Int32 Compare(IBasicLineString x, IBasicLineString y)
{
if (x == null)
{
throw new ArgumentNullException("x", "The x argument is null.");
}
if (y == null)
{
throw new ArgumentNullException("y", "The y argument is null.");
}
if (x == y)
{
return(0);
}
Int32 index = 0;
// look for the first different coordinate in the linestring
while (index < x.Count && index < y.Count)
{
Int32 comparison = _comparer.Compare(x.GetCoordinate(index), y.GetCoordinate(index));
if (comparison != 0)
{
return(comparison);
}
index++;
}
// check whether there are additional coordinates in either linestring
if (index < x.Count)
{
return(1);
}
if (index < y.Count)
{
return(-1);
}
return(0);
}