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table_delta.h

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// Table Delta implementation -*- C++ -*-

// Copyright (C) 2001-2003 Hermann Schichl
//
// This file is part of the COCONUT API.  This library
// is free software; you can redistribute it and/or modify it under the
// terms of the Library GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library 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
// Library GNU General Public License for more details.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the Library GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the Library GNU General Public License.

#ifndef _TABLE_DELTA_H_
#define _TABLE_DELTA_H_

#include <api_delta.h>

class table_delta : public delta_base
{
public:
  typedef std::pair<std::string,dbt_row> t_line;
  typedef std::vector<t_line> t_ctr;

private:
  t_ctr t_new;
  std::vector<annotation> t_rm;

public:
  table_delta(const std::string& a) : delta_base(a), t_new(), t_rm() {}

  table_delta(const std::string& a, const t_ctr& _n,
              const std::vector<annotation>& _r) : delta_base(a), t_new(_n),
                                                   t_rm(_r) {}

  table_delta(const table_delta& __d) : delta_base(__d), t_new(__d.t_new),
                                        t_rm(__d.t_rm)
    {
#if DEBUG_DELTA
        std::cerr << "Called table_delta copy constructor" << std::endl;
#endif
    }
  
  table_delta(const std::string& a, const std::string& __tn, const dbt_row& __t)
                                      : delta_base(a), t_new(), t_rm()
    { t_new.push_back(std::make_pair(__tn, __t)); }

  table_delta(const std::string& a, const std::string& __tn,
              const std::vector<dbt_row>& __t)
                                      : delta_base(a), t_new(), t_rm()
    { t_new.reserve(__t.size());
      for(std::vector<dbt_row>::const_iterator __x = __t.begin();
          __x != __t.end(); ++__x)
        t_new.push_back(std::make_pair(__tn, *__x));
    }

  void add(const t_line& _tl) { t_new.push_back(_tl); }
  void add(const std::string& _tn, const dbt_row& _r)
        { add(std::make_pair(_tn, _r)); }
  void add(const std::vector<t_line>& _tlv)
        { t_new.insert(t_new.end(), _tlv.begin(), _tlv.end()); }
  void rm(const annotation& _tr) { t_rm.push_back(_tr); }
  void rm(const std::vector<annotation>& _trv)
        { t_rm.insert(t_rm.end(), _trv.begin(), _trv.end()); }

  virtual table_delta* new_copy() const { return new table_delta(*this); }

  virtual void destroy_copy(table_delta* __d) { delete __d; }

  virtual void create_table(work_node& _x, vdbl::standard_table*& ptb,
                            const std::string& __t) const {};

  virtual bool apply(work_node& _x, undelta_base*& _u) const;

  void convert(work_node& _x, delta_base*& _u);
};

#endif /* _TABLE_DELTA_H_ */

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