private void fwdELCA()
{
Item2 v = null;
int[] w;
while (!fwdEof())
{
if (fwdGetCA(out v))
{
while (S.Count > 0 && S.Peek()[0] != v.PIDPos)
{
w = S.Pop();
modTop(w);
if (isELCA(w))
{
ELCAs.Add(Ls2[0][w[0]]);
}
}
S.Push((int[])cursors.Clone());
}
fwdAdvance();
}
while (S.Count > 0)
{
w = S.Pop();
modTop(w);
if (isELCA(w))
{
ELCAs.Add(Ls2[0][w[0]]);
}
}
}
private void bwdSLCA()
{
for (int i = 0; i < Ls2.Count; i++)
{
cursors[i] = Ls2[i].Count - 1;
}
int u = -1;
Item2 v = null;
while (!bwdEof())
{
if (bwdGetCA(out v))
{
if (u != Ls2[0].IndexOf(v))
{
SLCAs.Add(v);
}
u = v.PIDPos;
}
else
{
break;
}
bwdAdvance();
}
}
public Item2(Item2 other)
{
ID = other.ID;
PIDPos = other.PIDPos;
Ndesc = other.Ndesc;
value = other.value;
name = other.name;
}
public void printLs2()
{
for (int i = 0; i < Ls2.Count; i++)
{
Console.Write(String.Format("{0}:", keywords[i]));
for (int j = 0; j < Ls2[i].Count; j++)
{
Item2 item2 = Ls2[i][j];
Console.Write(String.Format("[ID:{0}, name:{1}, PIDPos:{2}, Ndesc:{3}]-", item2.ID, item2.name, item2.PIDPos, item2.Ndesc));
}
Console.WriteLine();
}
}
private void printLs2()
{
for (int i = 0; i < Ls2.Count; i++)
{
Console.WriteLine(keywords[i] + ":");
for (int j = 0; j < Ls2[i].Count; j++)
{
Item2 item = Ls2[i][j];
Console.WriteLine("[ID:" + item.ID + ",name:" + item.name + ",PIDPos:" + item.PIDPos + ",Ndesc:" + item.Ndesc + ",n:" + item.n);
}
Console.WriteLine("-----------------------");
}
}
public string printSLCAs(bool isConsole)
{
StringBuilder sb = new StringBuilder();
sb.Append("SLCAs for keywords {");
foreach (string keyword in keywords)
{
sb.Append(keyword);
sb.Append(",");
}
sb.Replace(',', '}', sb.Length - 1, 1);
sb.Append("\r\n");
for (int i = 0; i < SLCAs.Count; i++)
{
Item2 item = SLCAs[i];
sb.Append("[ID:");
sb.Append(item.ID);
sb.Append(", Name:");
sb.Append(item.name);
sb.Append(", PIDPos:");
sb.Append(item.PIDPos);
sb.Append(", Ndesc:");
sb.Append(item.Ndesc);
sb.Append(", Value:");
sb.Append(item.value == null ? "NULL" : item.value);
sb.Append("]");
sb.Append("\r\n");
}
sb.Append("# of SLCAs:");
sb.Append(SLCAs.Count);
sb.Append("\r\n");
sb.Append("------------------------------------------------------------------------------------\r\n");
if (isConsole)
{
Console.Write(sb.ToString());
}
else
{
return(sb.ToString());
}
return(null);
}
private void fwdSLCA()
{
int u = -1;
Item2 v = null;
while (!fwdEof())
{
if (fwdGetCA(out v))
{
if (u != v.PIDPos)
{
SLCAs.Add(Ls2[0][u]);
}
u = Ls2[0].IndexOf(v);
fwdAdvance();
}
else
{
SLCAs.Add(Ls2[0][u]);
break;
}
}
}
private void bwdELCA()
{
Item2 v = null;
int[] w;
while (!bwdEof())
{
if (bwdGetCA(out v))
{
if (S.Count == 0)
{
ELCAs.Add(v);
if (v.PIDPos == -1)
{
break;
}
pushParent();
}
else
{
if (v.ID == Ls2[0][S.Peek()[0]].ID)
{
Console.WriteLine("==");
w = S.Pop();
if (isELCA(w))
{
ELCAs.Add(Ls2[0][w[0]]);
}
if (S.Count == 0)
{
if (v.PIDPos == -1)
{
break;
}
else
{
pushParent();
}
}
else if (Ls2[0][v.PIDPos].ID == Ls2[0][S.Peek()[0]].ID)
{
modTop(cursors);
}
else
{
pushParent();
}
}
else
{
Console.WriteLine("!=");
ELCAs.Add(v);
if (Ls2[0][v.PIDPos].ID == Ls2[0][S.Peek()[0]].ID)
{
modTop(cursors);
}
else
{
pushParent();
}
}
}
}
else
{
break;
}
bwdAdvance();
}
}
public bool bwdGetCA(out Item2 c)
{
bool success;
do
{
success = true;
bool FOL = false;
int minID = Int32.MaxValue;
int[] tempCur = cursors;
for (int i = 0; i < cursors.Length; i++)
{
int Id = Ls2[i][cursors[i]].ID;
if (minID > Id)
{
minID = Id;
}
}
for (int n = 0; n < Ls2.Count; n++)
{
int Pos = bwdBinSearch(n, minID);
if (Pos == -1)
{
FOL = true;
break;
}
if (Pos == -2)
{
success = false;
break;
}
else
{
tempCur[n] = Pos;
}
}
if (FOL)
{
c = null;
success = false;
break;
}
if (success)
{
cursors = tempCur;
c = Ls2[0][cursors[0]];
break;
}
else
{
bwdAdvance();
if (bwdEof())
{
success = false;
c = null;
break;
}
}
} while (true);
return(success);
}
public bool fwdGetCA(out Item2 c)
{
bool success = true;
do
{
success = true;
bool EOL = false;
int maxID = -1;
int[] tempCur = cursors;
for (int i = 0; i < cursors.Length; i++)
{
int Id = Ls2[i][cursors[i]].ID;
if (maxID < Id)
{
maxID = Id;
}
}
for (int n = 0; n < Ls2.Count; n++)
{
int Pos = fwdBinSearch(n, maxID);
if (Pos >= Ls2[n].Count)
{
EOL = true;
break;
}
if (Pos == -1)
{
success = false;
break;
}
else
{
tempCur[n] = Pos;
}
}
if (EOL)
{
c = null;
success = false;
break;
}
if (success)
{
cursors = tempCur;
c = Ls2[0][cursors[0]];
break;
}
else
{
fwdAdvance();
if (fwdEof())
{
success = false;
c = null;
break;
}
}
} while (true);
return(success);
}
public void buildLs2(string xmlPath, string p)
{
keywords = Regex.Split(p.Trim(), @" +").ToList <String>();
Ls2.Clear();
for (int i = 0; i < keywords.Count; i++)
{
Ls2.Add(new List <Item2>());
}
XmlReaderSettings settings = new XmlReaderSettings();
settings.DtdProcessing = DtdProcessing.Parse;
XmlReader xmlReader = XmlReader.Create(xmlPath, settings);
int currID = 1;
Stack <Item2> parentsLinks = new Stack <Item2>();
int depth = 0;
while (xmlReader.Read())
{
switch (xmlReader.NodeType)
{
case XmlNodeType.Element:
Item2 item2 = new Item2(currID++, xmlReader.Name);
parentsLinks.Push(item2);
depth++;
break;
case XmlNodeType.Text:
for (int i = 0; i < keywords.Count; i++)
{
if (xmlReader.Value.ToLower().Contains(keywords[i].ToLower()))
{
Item2[] ancestors = parentsLinks.ToArray();
Array.Reverse(ancestors);
int j = ancestors.Length - 1;
int k = Ls2[i].Count - 1;
bool goThrough = false;
while (k >= 0 && j >= 0)
{
goThrough = true;
if (Ls2[i][k].ID < ancestors[j].ID)
{
j--;
}
else if (Ls2[i][k].ID == ancestors[j].ID)
{
break;
}
else
{
k--;
}
}
if (j >= 0 && k >= 0)
{
if (Ls2[i][k].ID != ancestors[j].ID)
{
throw new Exception("Not Merging into a same ancestors");
}
else
{
int pidPos = k;
while (k >= 0)
{
Ls2[i][k].Ndesc++;
k = Ls2[i][k].PIDPos;
}
j++;
int nextPidPos = Ls2[i].Count;
while (j < ancestors.Length)
{
Item2 it = new Item2(ancestors[j]);
it.PIDPos = pidPos;
it.Ndesc++;
Ls2[i].Add(it);
pidPos = nextPidPos;
nextPidPos++;
j++;
}
}
}
else
{
if (k == -1 && !goThrough)
{
j = 0;
int pidPos = -1;
while (j < ancestors.Length)
{
Item2 it = new Item2(ancestors[j]);
it.Ndesc++;
it.PIDPos = pidPos;
pidPos++;
Ls2[i].Add(it);
j++;
}
}
else
{
throw new Exception(String.Format("Something won't happen happened, j={0}, k={1}, goThrough={2}", j, k, goThrough));
}
}
}
}
break;
case XmlNodeType.EndElement:
depth--;
parentsLinks.Pop();
break;
}
}
sort();
}