/** Resolve the given rule. */
protected void ResolveRule(JSGFRule r)
{
if (r is JSGFRuleToken)
{
return;
}
if (r is JSGFRuleAlternatives)
{
foreach (JSGFRule rule in ((JSGFRuleAlternatives)r).GetRules())
{
ResolveRule(rule);
}
return;
}
if (r is JSGFRuleSequence)
{
foreach (JSGFRule rule in ((JSGFRuleSequence)r).Rules)
{
ResolveRule(rule);
}
return;
}
if (r is JSGFRuleCount)
{
ResolveRule(((JSGFRuleCount)r).Rule);
return;
}
if (r is JSGFRuleTag)
{
JSGFRuleTag rt = (JSGFRuleTag)r;
JSGFRule rule = rt.Rule;
String ruleStr = rule.ToString();
// add the tag the tag-table
var tags = RuleTags.Get(ruleStr);
if (tags == null)
{
tags = new HashSet <String>();
RuleTags.Put(ruleStr, tags);
}
tags.Add(rt.Tag);
ResolveRule(rule);
return;
}
if (r is JSGFRuleName)
{
JSGFRuleName rn = (JSGFRuleName)r;
JSGFRuleName resolved = Resolve(rn);
if (resolved == null)
{
throw new JSGFGrammarException("Unresolvable rulename in grammar " + _name + ": " + rn);
}
else
{
// TODO: This forces all rule names to be fully resolved.
// This should be changed.
rn.ResolvedRuleName = resolved.GetRuleName();
rn.SetRuleName(resolved.GetRuleName());
return;
}
}
throw new JSGFGrammarException("Unknown rule type");
}
