private bool AddPattern(Pattern frequentPattern)
{
if (subPatternCheck)
{
long index = frequentPattern.Support;
if (patternIndex.ContainsKey(index))
{
ISet<Pattern> indexSet = patternIndex[index];
bool replace = false;
Pattern replacablePattern = null;
foreach (Pattern p in indexSet)
{
if (frequentPattern.IsSubPatternOf(p))
{
return false;
}
else if (p.IsSubPatternOf(frequentPattern))
{
replace = true;
replacablePattern = p;
break;
}
}
if (replace)
{
indexSet.Remove(replacablePattern);
if (!indexSet.Contains(frequentPattern))
{
queue.Add(frequentPattern);
indexSet.Add(frequentPattern);
}
return false;
}
queue.Add(frequentPattern);
indexSet.Add(frequentPattern);
}
else
{
queue.Add(frequentPattern);
ISet<Pattern> patternList;
if (!patternIndex.ContainsKey(index))
{
patternList = new HashSet<Pattern>();
patternIndex.Add(index, patternList);
}
patternList = patternIndex[index];
patternList.Add(frequentPattern);
}
}
else
{
queue.Add(frequentPattern);
}
return true;
}
