void XMLDocMerger::fill_defaults(
YangNode* ynode,
XMLNode* new_node,
XMLNode* update_node,
bool* update_required
)
{
YangNode* yn = nullptr;
XMLNode* xchild = nullptr;
for (YangNodeIter it = ynode->child_begin();
it != ynode->child_end(); ++it) {
yn = &(*it);
const char* default_val = yn->get_default_value();
if (!default_val && !yn->has_default()) {
// Only default values or containers with default leaf descendents
continue;
}
// Default values may be within a choice/case. Check if the choice has
// another case. If the same case is present
YangNode* ychoice = yn->get_choice();
YangNode* ycase = yn->get_case();
YangNode* other_choice = nullptr;
YangNode* other_case = nullptr;
bool add_default = true;
bool subtree_update = false;
if (ychoice && ycase && (ychoice->get_default_case() != ycase)) {
add_default = false;
}
for (XMLNodeIter xit = new_node->child_begin();
xit != new_node->child_end(); ++xit) {
xchild = &(*xit);
if (xchild->get_local_name() == yn->get_name() &&
xchild->get_name_space() == yn->get_ns()) {
if (yn->get_stmt_type() == RW_YANG_STMT_TYPE_CONTAINER) {
// The container has a default descendant node
XMLNode* update_child = nullptr;
bool created = false;
if ((update_child = update_node->find(
yn->get_name(), yn->get_ns())) == nullptr) {
update_child = update_node->add_child(yn);
created = true;
}
fill_defaults(yn, xchild, update_child, &subtree_update);
if (!subtree_update && created) {
update_node->remove_child(update_child);
}
*update_required = (*update_required || subtree_update);
}
// Default node already present in the new-dom
add_default = false;
break;
}
if (!ychoice) {
// Not part of a choice
continue;
}
other_choice = xchild->get_yang_node()->get_choice();
if (!other_choice || (other_choice != ychoice)) {
// Other node is not a choice, or not the same choice, not conflicting
continue;
}
other_case = xchild->get_yang_node()->get_case();
if (other_case && (ycase != other_case)) {
// There is a node with conflicting case. Hence no default
add_default = false;
break;
}
// Same case, in-case the case is not default, some-other node in the same
// case is set. Then add this default, unless the same node is found in
// the new-dom.
add_default = true;
}
if (add_default) {
XMLNode* xn = new_node->add_child(yn, default_val);
RW_ASSERT(xn);
XMLNode* un = update_node->add_child(yn, default_val);
if (yn->get_stmt_type() == RW_YANG_STMT_TYPE_CONTAINER) {
// The container has a default descendant node
fill_defaults(yn, xn, un, &subtree_update);
if (!subtree_update) {
new_node->remove_child(xn);
update_node->remove_child(un);
}
*update_required = (*update_required || subtree_update);
} else {
*update_required = true;
}
}
}
}
