public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (!(obj is IGroup))
{
return(false);
}
IGroup group = (IGroup)obj;
if (this.Order != group.Order)
{
return(false);
}
return(GroupUtilities.AreEqual(this, group));
}
internal static List <IGroup> GroupsClosure(ICollection <IGroup> initialGroups)
{
List <IGroup> groups = new List <IGroup>(initialGroups);
int lastprocessed = 0;
while (lastprocessed < groups.Count)
{
List <IGroup> newgroups = new List <IGroup>();
for (int k = 0; k < groups.Count; k++)
{
for (int j = lastprocessed; j < groups.Count; j++)
{
IGroup newgroup = GroupUtilities.Multiply(groups[k], groups[j]);
if (!newgroups.Contains(newgroup) && !groups.Contains(newgroup))
{
newgroups.Add(newgroup);
}
newgroup = GroupUtilities.Multiply(groups[j], groups[k]);
if (!newgroups.Contains(newgroup) && !groups.Contains(newgroup))
{
newgroups.Add(newgroup);
}
}
}
lastprocessed = groups.Count;
groups.AddRange(newgroups);
}
return(groups);
}