private Trail handleDefaultChild(Trail trail, Node node, EvaluationContext context) {
// "The defaultChild missing value strategy requires the presence of the defaultChild attribute
// in every non-leaf Node"
String defaultChild = node.getDefaultChild();
if (defaultChild == null) {
throw new InvalidFeatureException(node);
}
trail.addMissingLevel();
List<Node> children = node.getNodes();
for (int i = 0, max = children.size(); i < max; i++) {
Node child = children.get(i);
String id = child.getId();
if (id != null && (id).equals(defaultChild)) {
// The predicate of the referenced Node is not evaluated
return handleTrue(trail, child, context);
}
}
// "Only Nodes which are immediate children of the respective Node can be referenced"
throw new InvalidFeatureException(node);
}
