/*
 * Copyright 2015 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef SRC_CPP_SVCS_STMGR_SRC_GROUPING_FIELDS_GROUPING_H_
#define SRC_CPP_SVCS_STMGR_SRC_GROUPING_FIELDS_GROUPING_H_

#include <functional>
#include <vector>
#include "grouping/grouping.h"
#include "proto/messages.h"
#include "basics/basics.h"

namespace heron {
namespace stmgr {

class FieldsGrouping : public Grouping {
 public:
  FieldsGrouping(const proto::api::InputStream& _is, const proto::api::StreamSchema& _schema,
                 const std::vector<sp_int32>& _task_ids);
  virtual ~FieldsGrouping();

  virtual void GetListToSend(const proto::system::HeronDataTuple& _tuple,
                             std::vector<sp_int32>& _return);

 private:
  std::vector<sp_int32> fields_grouping_indices_;
  std::hash<sp_string> str_hash_fn;
};

}  // namespace stmgr
}  // namespace heron

#endif  // SRC_CPP_SVCS_STMGR_SRC_GROUPING_FIELDS_GROUPING_H_