C++ finish MarkLogic UDF function

finish-ml-udf.cpp

template<class T>
void Bucketeer<T>::
finish(OutputSequence& os, Reporter& reporter)
{
  // start the MarkLogic map
  os.startMap();
  // interate over the unique keys
  // note the use of buckets.upper_bound() to ensure we get a key only once
  for (typename std::multimap<String, T>::iterator it = buckets.begin(); it != buckets.end(); it = buckets.upper_bound(it->first)) {
    std::pair <typename std::multimap<String,T>::iterator, typename std::multimap<String,T>::iterator> ret;
    // get the range for the key values
    ret = buckets.equal_range(it->first);
    // write the map key
    os.writeMapKey(it->first);
    // iterate over the values for current key
    for (typename std::multimap<String, T>::iterator it2 = ret.first; it2 != ret.second; ++it2) {
      // write the value
      os.writeValue(it2->second);
    }
  }
  os.endMap();
}