// Method to evaluate the clause collumns of the TT
// Is this even used?
private void EvaluateClauses()
{
List <String> ClauseSymbols = new List <String>();
List <SymbolValue> SymbolValues = new List <SymbolValue>();
SymbolValue TempSymbolValue = new SymbolValue();
for (int ClauseNum = 0; ClauseNum < KnowledgeBase.Count; ClauseNum++)
{
ClauseSymbols = KnowledgeBase[ClauseNum].GetSymbols();
foreach (String clausey in ClauseSymbols)
{
TempSymbolValue.SymbolName = clausey;
TempSymbolValue.Value = false; //Set to false by default
SymbolValues.Add(TempSymbolValue);
}
//SymbolValues now contains all symbols but still need to set values
foreach (List <Boolean> Row in Table)
{
for (int ColNum = 0; ColNum < Symbols.Count; ColNum++)
{
for (int ClauseSymbolNum = 0; ClauseSymbolNum < SymbolValues.Count; ClauseSymbolNum++)
{
if (Symbols[ColNum] == SymbolValues[ClauseSymbolNum].SymbolName)
{
TempSymbolValue = SymbolValues[ClauseSymbolNum];
TempSymbolValue.Value = Row[ColNum];
SymbolValues[ClauseSymbolNum] = TempSymbolValue;
}
}
}
Row[ClauseNum + Symbols.Count] = KnowledgeBase[ClauseNum].Evaluate(SymbolValues);
}
}
bool tempBool = true;
//Now evaluate sum of KB
foreach (List <Boolean> Row in Table)
{
tempBool = true; // re-init to true
for (int ClauseNum = 0; ClauseNum < KnowledgeBase.Count; ClauseNum++)
{
if (!Row[Symbols.Count + ClauseNum])
{
tempBool = false;
}
}
Row[Symbols.Count + KnowledgeBase.Count] = tempBool;
}
}
// Method to evaluate the querey collumn of the TT
// return value shows number of times query enatils KB...
override public string EvaluateQuery(QueryClass Query, Boolean Debug)
{
// first fill in the collumn, then check if query is a subset of
// the valid worlds of the TT (the rows where SUM clauses = true)
LoadSymbolsList(Query);
List <String> ClauseSymbols = new List <String>();
List <SymbolValue> SymbolValues = new List <SymbolValue>();
SymbolValue TempSymbolValue = new SymbolValue();
ClauseSymbols = Query.QueryClause.GetSymbols();
foreach (String clausey in ClauseSymbols)
{
TempSymbolValue.SymbolName = clausey;
TempSymbolValue.Value = false; //Set to false by default
SymbolValues.Add(TempSymbolValue);
}
//SymbolValues now contains all symbols but still need to set values
foreach (List <Boolean> Row in Table)
{
for (int ColNum = 0; ColNum < Symbols.Count; ColNum++)
{
for (int ClauseSymbolNum = 0; ClauseSymbolNum < SymbolValues.Count; ClauseSymbolNum++)
{
if (Symbols[ColNum] == SymbolValues[ClauseSymbolNum].SymbolName)
{
TempSymbolValue = SymbolValues[ClauseSymbolNum];
TempSymbolValue.Value = Row[ColNum];
SymbolValues[ClauseSymbolNum] = TempSymbolValue;
}
}
}
Row[Symbols.Count + KnowledgeBase.Count + 1] = Query.QueryClause.Evaluate(SymbolValues);
}
// Check if query is a subset of the valid worlds of the TT
// (the rows where SUM clauses = true)
Boolean QueryResult = true;
int NumValidWorlds = 0;
foreach (List <Boolean> Row in Table)
{
if (Row[Symbols.Count + KnowledgeBase.Count] == true)
{
// if the SUM clauses entry is true, check if the Query entry is true
if (Row[Symbols.Count + KnowledgeBase.Count + 1] == true)
{
// if it's untrue, then change the QueryResult to false.
// as the valid worlds / KB is NOT a subset of the query
NumValidWorlds++;
}
else
{
// if it's false, then don't change the temp bool
QueryResult = false;
}
}
}
// Format the Result string
if (Debug)
{
this.PrintTT();
} // for debugging
if (QueryResult)
{
// "When the method is TT and the answer is YES,
// it should be followed by a colon (:) and
// the number of models of KB"
return("YES: " + NumValidWorlds);
}
else
{
return("NO");
}
}
