OpenNebula

        // Check if an attribute already exists with given name

        vector<Attribute *> matches;

        get(it->first, matches);

        if (matches.size() == 0)

        {

            // Add new attribute

            this->set(it->second->clone());

            continue;

        }

        Attribute * attr = matches[0];

        if (attr->type() != it->second->type() || attr->type() == Attribute::SIMPLE)

        {

            // Replace existing attribute

            this->erase(it->first);

            this->set(it->second->clone());

        }

        else if (attr->type() == Attribute::VECTOR)

        {

            // Replace values of the first vector that matched

            const map<string,string> values = ((VectorAttribute*) it->second)->value();

            map<string,string>::const_iterator it;

            for (it = values.begin(); it != values.end(); ++it)

            {

                ((VectorAttribute*) attr)->replace(it->first, it->second);

            }

        }