// non-static methods
int IComparer.Compare(object first, object second)
{
if (first is int == false || second is string == false)
{
throw new ArgumentException("In ComparerForBinarySearch.Compare(object, object): invalid argument(s)");
}
int index = (int)first;
string valueToCompare = (string)second;
Record record = new Record(path, strPositions[index]);
if (value == ComparingValues.name)
{
return record.name.CompareTo(valueToCompare);
}
else if (value == ComparingValues.surname)
{
return record.surname.CompareTo(valueToCompare);
}
else
{
return record.id.CompareTo(valueToCompare);
}
}
private void SetGetSurnamesDelegate()
{
GetSurnames = delegate(ref List<Record> storage, string valueToCompare, int binarySearchIndex)
{
Record recordBuffer;
while (binarySearchIndex > 0)
{
recordBuffer = new Record(path, positions[sortedSurnames[binarySearchIndex - 1]]);
if (recordBuffer.surname != valueToCompare)
{
break;
}
--binarySearchIndex;
}
while (binarySearchIndex < sortedSurnames.Length)
{
recordBuffer = new Record(path, positions[sortedSurnames[binarySearchIndex]]);
if (recordBuffer.surname != valueToCompare)
{
break;
}
else
{
storage.Add(recordBuffer);
++binarySearchIndex;
}
}
};
}
private void SetGenerateKeyDelegate()
{
GenerateKey = delegate(ComparingValues valuesToCompare)
{
int[] valuesToSort = new int[positions.Count];
for (int i = 0; i < valuesToSort.Length; ++i)
{
valuesToSort[i] = i;
}
Comparison<int> sortByValue = delegate(int a, int b)
{
Record person1 = new Record(path, positions[a]);
Record person2 = new Record(path, positions[b]);
if (valuesToCompare == ComparingValues.name)
{
return person1.name.CompareTo(person2.name);
}
else if (valuesToCompare == ComparingValues.surname)
{
return person1.surname.CompareTo(person2.surname);
}
else
return person1.id.CompareTo(person2.id);
};
Array.Sort(valuesToSort, sortByValue);
if (valuesToCompare == ComparingValues.name)
{
sortedNames = valuesToSort;
}
else if (valuesToCompare == ComparingValues.surname)
{
sortedSurnames = valuesToSort;
}
else
sortedIDs = valuesToSort;
};
}
