public static AbstractElement getPredicatedElement(AbstractElement element) {
if (element.isPredicated()) {
return element;
}
if (element instanceof Assignment) {
return getPredicatedElement(((Assignment) element).getTerminal());
}
if (element instanceof RuleCall) {
final RuleCall ruleCall = (RuleCall) element;
final AbstractRule calledRule = ruleCall.getRule();
Group group = (Group) calledRule.getAlternatives();
AbstractElement first = group.getElements().get(0);
AbstractElement result = getPredicatedElement(first);
if (ruleCall.getArguments().isEmpty()) {
return result;
}
EcoreUtil.Copier copier =
new EcoreUtil.Copier() {
private static final long serialVersionUID = 1L;
@Override
public EObject copy(EObject eObject) {
if (eObject instanceof ParameterReference) {
ParameterReference paramRef = (ParameterReference) eObject;
Parameter parameter = paramRef.getParameter();
if (calledRule == GrammarUtil.containingRule(parameter)) {
for (NamedArgument givenArgument : ruleCall.getArguments()) {
if (givenArgument.getParameter() == parameter) {
EObject result = copy(givenArgument.getValue());
return result;
}
}
throw new IllegalStateException();
}
}
return super.copy(eObject);
}
};
AbstractElement clone = (AbstractElement) copier.copy(result);
copier.copyReferences();
return clone;
}
return element;
}
protected boolean _predicated(final AbstractElement it) {
return it.isPredicated();
}