public PatternMatch next() {
if (match == null) {
match = findNextMatch();
optionalFinder = null;
}
PatternMatch matchToReturn = match;
PatternMatch optionalMatchToReturn = null;
if (match != null && optionalNodes != null) {
if (optionalFinder == null) {
optionalFinder = new OptionalPatternFinder(matcher, match, optionalNodes);
}
if (optionalMatch == null) {
optionalMatch = optionalFinder.findNextOptionalPatterns();
}
optionalMatchToReturn = optionalMatch;
optionalMatch = null;
if (optionalMatchToReturn == null) {
match = null;
if (optionalFinder.anyMatchFound()) {
return next();
}
}
} else {
match = null;
}
if (matchToReturn == null) {
throw new NoSuchElementException();
}
return optionalMatchToReturn != null
? PatternMatch.merge(matchToReturn, optionalMatchToReturn)
: matchToReturn;
}
public boolean hasNext() {
if (match == null) {
match = findNextMatch();
optionalFinder = null;
} else if (optionalNodes != null) {
if (optionalFinder == null) {
optionalFinder = new OptionalPatternFinder(matcher, match, optionalNodes);
}
if (optionalMatch == null) {
optionalMatch = optionalFinder.findNextOptionalPatterns();
}
if (optionalMatch == null && optionalFinder.anyMatchFound()) {
match = null;
return hasNext();
}
}
return match != null;
}