public String defaultValue(final AbstractElement ele, final Set<AbstractElement> visited) {
String _switchResult = null;
boolean _matched = false;
if (!_matched) {
boolean _add = visited.add(ele);
boolean _not = (!_add);
if (_not) {
_matched = true;
_switchResult = "";
}
}
if (!_matched) {
boolean _isOptionalCardinality = GrammarUtil.isOptionalCardinality(ele);
if (_isOptionalCardinality) {
_matched = true;
_switchResult = "";
}
}
if (!_matched) {
if (ele instanceof Alternatives) {
_matched = true;
EList<AbstractElement> _elements = ((Alternatives) ele).getElements();
AbstractElement _head = IterableExtensions.<AbstractElement>head(_elements);
_switchResult = this.defaultValue(_head, visited);
}
}
if (!_matched) {
if (ele instanceof Group) {
_matched = true;
EList<AbstractElement> _elements = ((Group) ele).getElements();
final Function1<AbstractElement, String> _function =
new Function1<AbstractElement, String>() {
@Override
public String apply(final AbstractElement e) {
return AbstractSyntacticSequencer.this.defaultValue(e, visited);
}
};
List<String> _map = ListExtensions.<AbstractElement, String>map(_elements, _function);
_switchResult = IterableExtensions.join(_map);
}
}
if (!_matched) {
if (ele instanceof Keyword) {
_matched = true;
_switchResult = ((Keyword) ele).getValue();
}
}
if (!_matched) {
if (ele instanceof RuleCall) {
_matched = true;
AbstractRule _rule = ((RuleCall) ele).getRule();
AbstractElement _alternatives = _rule.getAlternatives();
_switchResult = this.defaultValue(_alternatives, visited);
}
}
if (!_matched) {
_switchResult = "";
}
return _switchResult;
}
@Override
public Boolean caseCompoundElement(CompoundElement object) {
Multimap<String, AbstractElement> prevAssignedFeatures = newMultimap(assignedFeatures);
for (AbstractElement element : object.getElements()) {
doSwitch(element);
}
if (GrammarUtil.isMultipleCardinality(object)) {
for (AbstractElement element : object.getElements()) {
doSwitch(element);
}
}
if (GrammarUtil.isOptionalCardinality(object)) assignedFeatures.putAll(prevAssignedFeatures);
return Boolean.FALSE;
}
@Override
public Boolean caseAlternatives(Alternatives object) {
Multimap<String, AbstractElement> prevAssignedFeatures = assignedFeatures;
Multimap<String, AbstractElement> mergedAssignedFeatures = LinkedHashMultimap.create();
for (AbstractElement element : object.getElements()) {
assignedFeatures = newMultimap(prevAssignedFeatures);
doSwitch(element);
mergedAssignedFeatures.putAll(assignedFeatures);
}
if (GrammarUtil.isOptionalCardinality(object)) {
mergedAssignedFeatures.putAll(prevAssignedFeatures);
}
assignedFeatures = mergedAssignedFeatures;
if (GrammarUtil.isMultipleCardinality(object)) {
prevAssignedFeatures = assignedFeatures;
for (AbstractElement element : object.getElements()) {
assignedFeatures = newMultimap(prevAssignedFeatures);
doSwitch(element);
mergedAssignedFeatures.putAll(assignedFeatures);
}
assignedFeatures = mergedAssignedFeatures;
}
return Boolean.FALSE;
}
public boolean isOptional(AbstractElement element) {
return GrammarUtil.isOptionalCardinality(element);
}