private void addForwardJumps(List <GrammarNode> wordGrammarNodes,
GrammarNode branchNode, GrammarNode finalNode)
{
GrammarNode currNode = branchNode;
for (int i = -1; i < wordGrammarNodes.Count; i++)
{
if (i > -1)
{
currNode = wordGrammarNodes[i];
}
for (int j = i + 2; j < Math.Min(wordGrammarNodes.Count, i + numAllowedWordJumps + 1); j++)
{
GrammarNode jumpNode = wordGrammarNodes[j];
currNode.add(
jumpNode,
logMath.linearToLog(forwardJumpProbability));
}
}
for (int i = wordGrammarNodes.Count - numAllowedWordJumps - 1; i < wordGrammarNodes.Count - 1; i++)
{
int j = wordGrammarNodes.Count;
currNode = wordGrammarNodes[i];
currNode.add(finalNode, logMath.linearToLog((float)forwardJumpProbability * Math.Pow(Math.E, j - i)));
}
}
/*
* (non-Javadoc)
* We want a very strict grammar structure like the following:
* InitialNode ----> KW1 ---> KW2 .... ---> KWn ---> FinalNode
* ↑________________________________________________|
*/
protected override GrammarNode createGrammar()
{
string silence = Constants.SILENCE_SPELLING;
initialNode = createGrammarNode(silence);
finalNode = createGrammarNode(silence);
GrammarNode lastNode = createGrammarNode(silence);
initialNode.add(lastNode, LogMath.getLogOne());
lastNode.add(initialNode, LogMath.getLogOne());
GrammarNode lastWordGrammarNode = initialNode;
/*Iterator<string> iter = tokens.iterator();
* while(iter.hasNext()){
* GrammarNode currNode = createGrammarNode(iter.next());
* lastWordGrammarNode.add(currNode, logMath.getLogOne());
* lastWordGrammarNode = currNode;
*
* // Parallel keyword topology
* //initialNode.add(currNode, logMath.getLogOne());
*
* //currNode.add(finalNode, logMath.getLogOne());
* }*/
foreach (var token in tokens)
{
GrammarNode currNode = createGrammarNode(token);
lastWordGrammarNode.add(currNode, LogMath.getLogOne());
lastWordGrammarNode = currNode;
}
lastWordGrammarNode.add(lastNode, LogMath.getLogOne());
lastNode.add(finalNode, logMath.linearToLog(0.0001));
finalNode.setFinalNode(true);
return(initialNode);
}
private JSGFGrammar.GrammarGraph processRuleSequence(JSGFRuleSequence jsgfruleSequence)
{
GrammarNode grammarNode = null;
GrammarNode grammarNode2 = null;
this.logger.fine(new StringBuilder().append("parseRuleSequence: ").append(jsgfruleSequence).toString());
List rules = jsgfruleSequence.getRules();
GrammarNode grammarNode3 = null;
for (int i = 0; i < rules.size(); i++)
{
JSGFRule rule = (JSGFRule)rules.get(i);
JSGFGrammar.GrammarGraph grammarGraph = this.processRule(rule);
if (i == 0)
{
grammarNode = grammarGraph.getStartNode();
}
if (i == rules.size() - 1)
{
grammarNode2 = grammarGraph.getEndNode();
}
if (i > 0)
{
grammarNode3.add(grammarGraph.getStartNode(), 0f);
}
grammarNode3 = grammarGraph.getEndNode();
}
return(new JSGFGrammar.GrammarGraph(this, grammarNode, grammarNode2));
}
private void createBaseGrammar(List <GrammarNode> wordGrammarNodes,
GrammarNode branchNode, GrammarNode finalNode)
{
branchNode.add(wordGrammarNodes[0], LogMath.getLogOne());
for (var i = 0; i < wordGrammarNodes.Count - 1; i++)
{
var currNode = wordGrammarNodes[i];
var nextNode = wordGrammarNodes[i + 1];
currNode.add(nextNode, LogMath.getLogOne());
}
var lastNode = wordGrammarNodes[wordGrammarNodes.Count - 1];
lastNode.add(finalNode, LogMath.getLogOne());
/*GrammarNode currNode = branchNode;
* ListIterator<GrammarNode> iter = wordGrammarNodes.listIterator();
* while (iter.hasNext()) {
* GrammarNode nextNode = iter.next();
* currNode.add(nextNode, logMath.getLogOne());
* currNode = nextNode;
* }
* currNode.add(finalNode, logMath.getLogOne());*/
}
