Status storageValidChildren(const mb::ConstElement& elem, const bool deep) {
if (!elem.hasChildren())
return Status::OK();
mb::ConstElement curr = elem.leftChild();
while (curr.ok()) {
Status s = storageValid(curr, deep);
if (!s.isOK())
return s;
curr = curr.rightSibling();
}
return Status::OK();
}
/**
* Checks that all parents, of the element passed in, are valid for storage
*
* Note: The elem argument must be in a valid state when using this function
*/
Status storageValidParents(const mb::ConstElement& elem) {
const mb::ConstElement& root = elem.getDocument().root();
if (elem != root) {
const mb::ConstElement& parent = elem.parent();
if (parent.ok() && parent != root) {
Status s = storageValid(parent, false);
if (s.isOK()) {
s = storageValidParents(parent);
}
return s;
}
}
return Status::OK();
}
Status storageValid(const mb::ConstElement& elem, const bool deep) {
if (!elem.ok())
return Status(ErrorCodes::BadValue, "Invalid elements cannot be stored.");
// Field names of elements inside arrays are not meaningful in mutable bson,
// so we do not want to validate them.
//
// TODO: Revisit how mutable handles array field names. We going to need to make
// this better if we ever want to support ordered updates that can alter the same
// element repeatedly; see SERVER-12848.
const mb::ConstElement& parent = elem.parent();
const bool childOfArray = parent.ok() ? (parent.getType() == mongo::Array) : false;
if (!childOfArray) {
StringData fieldName = elem.getFieldName();
// Cannot start with "$", unless dbref
if (fieldName[0] == '$') {
Status status = validateDollarPrefixElement(elem, deep);
if (!status.isOK())
return status;
}
else if (fieldName.find(".") != string::npos) {
// Field name cannot have a "." in it.
return Status(ErrorCodes::DottedFieldName,
str::stream() << "The dotted field '"
<< elem.getFieldName() << "' in '"
<< mb::getFullName(elem)
<< "' is not valid for storage.");
}
}
if (deep) {
// Check children if there are any.
Status s = storageValidChildren(elem, deep);
if (!s.isOK())
return s;
}
return Status::OK();
}