/*
  Copyright (c) 2015, 2016 Oracle and/or its affiliates. All rights reserved.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; version 2 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef ITEM_PROCESSING_DATA_INCLUDED
#define ITEM_PROCESSING_DATA_INCLUDED

#include "chain_data.h"
#include "i_dump_task.h"
#include "i_chain_element.h"
#include "i_callable.h"
#include "base/atomic.h"

namespace Mysql{
namespace Tools{
namespace Dump{

/**
  Data structure for objects that are processed in any chain.
 */
class Item_processing_data
{
public:
  Item_processing_data(Chain_data* chain_data,
    I_dump_task* process_task_object,
    I_chain_element* chain_element,
    const Mysql::I_callable<void, Item_processing_data*>* completion_callback,
    Item_processing_data* parent_item_data);

  ~Item_processing_data();

  /**
    Returns chain data in which this item is being processed.
   */
  Chain_data* get_chain() const;

  Item_processing_data* get_parent_item_data() const;

  void start_processing();

  bool end_processing();

  I_dump_task* get_process_task_object() const;

  I_chain_element* get_processing_chain_element() const;

  bool have_completion_callback();

  bool had_chain_created() const;

  void set_had_chain_created();

  void set_chain(Chain_data*);

  bool call_completion_callback_at_end();
  
private:
  /**
    Chain in which current processing item is processed.
   */
  Chain_data* m_chain_data;
  /**
    Instance of task object that is being processing.
   */
  I_dump_task* m_process_task_object;
  /**
    Instance of chain element that is processing specified element.
   */
  I_chain_element* m_chain_element;
  /**
    Callback to call after element is fully processed to the output. Can be
    NULL.
   */
  const Mysql::I_callable<void, Item_processing_data*>* m_completion_callback;
  /**
    Link to item process information of parent module execution, if exists.
   */
  Item_processing_data* m_parent_item_data;
  /**
    Number of modules that have pending or are executing this task.
   */
  my_boost::atomic_uint32_t m_active_executions;
  /**
    Indicates if this item led to creation of at least one new chain.
  */
  bool m_had_chain_created;
};

}
}
}

#endif