//clears all the neighbours for this given suffix node
public void ClearNeigbours()
{
for (int i = 0; i < Neighbours.Length; i++)
Neighbours[i] = null; //any attatched object will be cleaned up by the garbage collecter
LeafNode = null;
}
//removes a word and all its information from the suffix tree
public void Remove(String word)
{
if (word.Length == 0)
{
LeafNode = null;
return;
}
char c = Char.ToLower(word[0]);
SuffixNode Node = Neighbours[MapToIndex(c)];
if (Node == null)
return;
Node.Remove(word.Substring(1)); //continue trimming
}
//adds a word with document specific information
public void Add(String word, DocumentIndex? index, int weight )
{
if (word.Length == 0)
{
if (LeafNode == null)
LeafNode = new SuffixLeafNode();
if (index != null)
LeafNode.AddDocumentIndex(index.Value,weight);
return;
}
char c = Char.ToLower(word[0]);
SuffixNode node = Neighbours[SuffixNode.MapToIndex(c)];
if (node == null)
{
Neighbours[SuffixNode.MapToIndex(c)] = new SuffixNode(c);
node = Neighbours[SuffixNode.MapToIndex(c)];
}
node.Add(word.Substring(1),index,weight);
}