protected internal virtual bool AddOneUnaryRule(UnaryRule rule, IDictionary <string, TransducerGraph> graphs)
{
string parentString = stateIndex.Get(rule.parent);
string childString = stateIndex.Get(rule.child);
if (IsSyntheticState(parentString))
{
string topcat = GetTopCategoryOfSyntheticState(parentString);
TransducerGraph graph = GetGraphFromMap(graphs, topcat);
double output = SmartNegate(rule.Score());
graph.AddArc(graph.GetStartNode(), parentString, childString, output);
return(true);
}
else
{
if (IsSyntheticState(childString))
{
// need to add Arc from synthetic state to endState
TransducerGraph graph = GetGraphFromMap(graphs, parentString);
double output = SmartNegate(rule.Score());
graph.AddArc(childString, parentString, End, output);
// parentString should the the same as endState
graph.SetEndNode(parentString);
return(true);
}
else
{
return(false);
}
}
}
protected internal virtual bool AddOneBinaryRule(BinaryRule rule, IDictionary <string, TransducerGraph> graphs)
{
// parent has to be synthetic in BinaryRule
string parentString = stateIndex.Get(rule.parent);
string leftString = stateIndex.Get(rule.leftChild);
string rightString = stateIndex.Get(rule.rightChild);
string source;
string target;
string input;
string bracket = null;
if (op.trainOptions.markFinalStates)
{
bracket = Sharpen.Runtime.Substring(parentString, parentString.Length - 1, parentString.Length);
}
// the below test is not necessary with left to right grammars
if (IsSyntheticState(leftString))
{
source = leftString;
input = rightString + (bracket == null ? ">" : bracket);
}
else
{
if (IsSyntheticState(rightString))
{
source = rightString;
input = leftString + (bracket == null ? "<" : bracket);
}
else
{
// we don't know what to do with this rule
return(false);
}
}
target = parentString;
double output = SmartNegate(rule.Score());
// makes it a real 0 <= k <= infty
string topcat = GetTopCategoryOfSyntheticState(source);
if (topcat == null)
{
throw new Exception("can't have null topcat");
}
TransducerGraph graph = GetGraphFromMap(graphs, topcat);
graph.AddArc(source, target, input, output);
return(true);
}
