C++ FieldList::end方法代码示例

void be_structure::put_core_fields
(
   ostream & os,
   be_Tab & tab,
   const DDS_StdString & sptr,
   FieldList & coreFields,
   unsigned long uid
)
{
   DDS::Boolean wroteOne = FALSE;
   DDS_StdString uids = BE_Globals::ulong_to_string(uid);
   DDS_StdString _in_ = (DDS_StdString)"_in_" + uids;
   FieldList::iterator it;

   // first, let's declare the core args for putting

   for (it = coreFields.begin(); it != coreFields.end(); it++)
   {
      (*it)->declare_for_struct_put (os, tab, sptr, uid);
   }

   //
   // now, let's initilize our put args
   //
   os << tab << "DDS::Codec::Param " << _in_ << "[" << coreFields.size() << "] =" << nl;
   os << tab << "{" << nl;

   tab.indent ();
   for (it = coreFields.begin(); it != coreFields.end(); it++)
   {
      if (wroteOne)
      {
         os << "," << nl;
      }

      (*it)->make_put_param (os, tab, sptr, uid);
      wroteOne = TRUE;
   }
   tab.outdent ();

   os << nl << tab << "};" << nl;

   // and finally, let's put 'em

   os << tab << "os.put (" << _in_ << ", " << coreFields.size ()
      << XBE_Ev::arg (XBE_ENV_VARN) << ");" << nl;
}

 void del_fields_in_table(doid_t id, const Class* dcc, const FieldList &fields)
 {
     string name;
     for(auto it = fields.begin(); it != fields.end(); ++it) {
         const Field* field = *it;
         if(field->has_keyword("db")) {
             m_sql << "UPDATE fields_" << dcc->get_name() << " SET " << field->get_name()
                   << "=NULL WHERE object_id=" << id << ";";
         }
     }
 }

    void get_fields_from_table(doid_t id, const Class* dcc, const FieldList &fields,
                               FieldValues &values)
    {
        string value;
        indicator ind;
        for(auto it = fields.begin(); it != fields.end(); ++it) {
            const Field* field = *it;
            if(field->has_keyword("db")) {
                m_sql << "SELECT " << field->get_name() << " FROM fields_" << dcc->get_name()
                      << " WHERE object_id=" << id << ";", into(value, ind);

                if(ind == i_ok) {
                    bool parse_err;
                    string packed_data = parse_value(field->get_type(), value, parse_err);
                    if(parse_err) {
                        m_log->error() << "Failed parsing value for field '" << field->get_name()
                                       << "' of object " << id << "' from database.\n";
                        continue;
                    }
                    values[field] = vector<uint8_t>(packed_data.begin(), packed_data.end());
                }
            }
        }
    }

bool DatabaseUtils::GetDatabaseResults(const MediaType &mediaType, const FieldList &fields, const std::unique_ptr<dbiplus::Dataset> &dataset, DatabaseResults &results)
{
  if (dataset->num_rows() == 0)
    return true;

  const dbiplus::result_set &resultSet = dataset->get_result_set();
  unsigned int offset = results.size();

  if (fields.empty())
  {
    DatabaseResult result;
    for (unsigned int index = 0; index < resultSet.records.size(); index++)
    {
      result[FieldRow] = index + offset;
      results.push_back(result);
    }

    return true;
  }

  if (resultSet.record_header.size() < fields.size())
    return false;

  std::vector<int> fieldIndexLookup;
  fieldIndexLookup.reserve(fields.size());
  for (FieldList::const_iterator it = fields.begin(); it != fields.end(); ++it)
    fieldIndexLookup.push_back(GetFieldIndex(*it, mediaType));

  results.reserve(resultSet.records.size() + offset);
  for (unsigned int index = 0; index < resultSet.records.size(); index++)
  {
    DatabaseResult result;
    result[FieldRow] = index + offset;

    unsigned int lookupIndex = 0;
    for (FieldList::const_iterator it = fields.begin(); it != fields.end(); ++it)
    {
      int fieldIndex = fieldIndexLookup[lookupIndex++];
      if (fieldIndex < 0)
        return false;

      std::pair<Field, CVariant> value;
      value.first = *it;
      if (!GetFieldValue(resultSet.records[index]->at(fieldIndex), value.second))
        CLog::Log(LOGWARNING, "GetDatabaseResults: unable to retrieve value of field %s", resultSet.record_header[fieldIndex].name.c_str());

      if (value.first == FieldYear &&
         (mediaType == MediaTypeTvShow || mediaType == MediaTypeEpisode))
      {
        CDateTime dateTime;
        dateTime.SetFromDBDate(value.second.asString());
        if (dateTime.IsValid())
        {
          value.second.clear();
          value.second = dateTime.GetYear();
        }
      }

      result.insert(value);
    }

    result[FieldMediaType] = mediaType;
    if (mediaType == MediaTypeMovie || mediaType == MediaTypeVideoCollection ||
        mediaType == MediaTypeTvShow || mediaType == MediaTypeMusicVideo)
      result[FieldLabel] = result.at(FieldTitle).asString();
    else if (mediaType == MediaTypeEpisode)
    {
      std::ostringstream label;
      label << (int)(result.at(FieldSeason).asInteger() * 100 + result.at(FieldEpisodeNumber).asInteger());
      label << ". ";
      label << result.at(FieldTitle).asString();
      result[FieldLabel] = label.str();
    }
    else if (mediaType == MediaTypeAlbum)
      result[FieldLabel] = result.at(FieldAlbum).asString();
    else if (mediaType == MediaTypeSong)
    {
      std::ostringstream label;
      label << (int)result.at(FieldTrackNumber).asInteger();
      label << ". ";
      label << result.at(FieldTitle).asString();
      result[FieldLabel] = label.str();
    }
    else if (mediaType == MediaTypeArtist)
      result[FieldLabel] = result.at(FieldArtist).asString();

    results.push_back(result);
  }

  return true;
}