public static int Compare(BritishPostcode comparand1,
BritishPostcode comparand2)
{
if (ReferenceEquals(comparand1, comparand2))
{
return(0);
}
if (ReferenceEquals(null, comparand1))
{
return(-1);
}
if (ReferenceEquals(null, comparand2))
{
return(1);
}
var comparison = Parts.Comparison(comparand1.Values.Area, comparand2.Values.Area);
if (comparison.HasValue)
{
return(comparison.Value);
}
comparison = Parts.Comparison(comparand1.Values.DistrictNumber, comparand2.Values.DistrictNumber);
if (comparison.HasValue)
{
return(comparison.Value);
}
comparison = Parts.Comparison(comparand1.Values.DistrictLetter, comparand2.Values.DistrictLetter);
if (comparison.HasValue)
{
return(comparison.Value);
}
comparison = Parts.Comparison(comparand1.Values.Sector, comparand2.Values.Sector);
if (comparison.HasValue)
{
return(comparison.Value);
}
comparison = Parts.Comparison(comparand1.Values.Unit, comparand2.Values.Unit);
return(comparison.HasValue
? comparison.Value
: 0);
}