/*
* /// (non-Javadoc)
* ///
* /// @see edu.cmu.sphinx.fst.State#addArc(edu.cmu.sphinx.fst.Arc)
*/
public override void AddArc(Arc arc)
{
throw new InvalidOperationException("You cannot modify an ImmutableState.");
}
/**
* /// Set an arc at the specified position in the arcs' array.
* ///
* /// @param index the position to the arcs' array
* /// @param arc the arc value to set
*/
public override void SetArc(int index, Arc arc)
{
_arcs[index] = arc;
}
public static Fst ImportFst(string basename, Semiring semiring)
{
Fst fst = new Fst(semiring);
HashMap <string, Integer> isyms = ImportSymbols(basename + ".input.syms");
if (isyms == null)
{
isyms = new HashMap <string, Integer>();
isyms.Put("<eps>", 0);
}
HashMap <string, Integer> osyms = ImportSymbols(basename
+ ".output.syms");
if (osyms == null)
{
osyms = new HashMap <string, Integer>();
osyms.Put("<eps>", 0);
}
HashMap <string, Integer> ssyms = ImportSymbols(basename + ".states.syms");
// Parse input
FileStream fis = new FileStream(basename + ".fst.txt", FileMode.Open);
TextReader br = new StreamReader(fis);
bool firstLine = true;
string strLine;
HashMap <Integer, State> stateMap = new HashMap <Integer, State>();
while ((strLine = br.ReadLine()) != null)
{
string[] tokens = strLine.Split("\\t");
Integer inputStateId;
if (ssyms == null)
{
inputStateId = Integer.ParseInt(tokens[0]);
}
else
{
inputStateId = ssyms.Get(tokens[0]);
}
State inputState = stateMap.Get(inputStateId);
if (inputState == null)
{
inputState = new State(semiring.Zero);
fst.AddState(inputState);
stateMap.Put(inputStateId, inputState);
}
if (firstLine)
{
firstLine = false;
fst.SetStart(inputState);
}
if (tokens.Length > 2)
{
Integer nextStateId;
if (ssyms == null)
{
nextStateId = Integer.ParseInt(tokens[1]);
}
else
{
nextStateId = ssyms.Get(tokens[1]);
}
State nextState = stateMap.Get(nextStateId);
if (nextState == null)
{
nextState = new State(semiring.Zero);
fst.AddState(nextState);
stateMap.Put(nextStateId, nextState);
}
// Adding arc
if (isyms.Get(tokens[2]) == null)
{
isyms.Put(tokens[2], isyms.Size());
}
int?iLabel = isyms.Get(tokens[2]);
if (osyms.Get(tokens[3]) == null)
{
osyms.Put(tokens[3], osyms.Size());
}
int?oLabel = osyms.Get(tokens[3]);
float arcWeight;
if (tokens.Length > 4)
{
arcWeight = Float.ParseFloat(tokens[4]);
}
else
{
arcWeight = 0;
}
Arc arc = new Arc(iLabel.Value, oLabel.Value, arcWeight, nextState);
inputState.AddArc(arc);
}
else
{
if (tokens.Length > 1)
{
float finalWeight = Float.ParseFloat(tokens[1]);
inputState.FinalWeight = finalWeight;
}
else
{
inputState.FinalWeight = 0.0f;
}
}
}
br.Close();
fst.Isyms = Utils.Utils.ToStringArray(isyms);
fst.Osyms = Utils.Utils.ToStringArray(osyms);
return(fst);
}
