private void NewGroup(DataItem di, List<Group> al, out Group g)
{
g = new Group();
g.keys = new object[attrs.Length];
int iKey = 0;
foreach (int a in attrs)
g.keys[iKey++] = di[a];
if (al == null)
al = new List<Group>();
g.hashcode = di.GetSpecificHashCode(attrs);
al.Add(g);
ht[g.hashcode] = al;
}
/// <summary>
/// Find the appropriate group for this DataItem object
/// </summary>
/// <param name="di">The input DataItem</param>
/// <param name="g">The group that the DataItem belongs to</param>
/// <returns>True if this group already exists, false if this is a new group</returns>
protected bool FindGroup(DataItem di, out Group g)
{
bool fExists = false;
if (attrs == null)
{
fExists = (gTotal != null);
if (!fExists)
{
gTotal = new Group();
gTotal.keys = null;
}
g = gTotal;
return fExists;
}
int hc = di.GetSpecificHashCode(attrs);
if (!ht.ContainsKey(hc))
NewGroup(di, null, out g);
else
{
bool fMatch = false;
bool fEq;
List<Group> al = ht[hc];
g = null;
for (int i = 0; fMatch == false && i < al.Count; i++)
{
g = al[i];
fEq = true;
for (int j = 0; fEq && j < g.keys.Length; j++)
fEq &= di[attrs[j]].Equals(g.keys[j]);
fMatch = fEq;
}
fExists = fMatch;
if (fMatch == false)
NewGroup(di, al, out g);
}
return fExists;
}