Constraint.hh

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// -*- mode:c++;tab-width:2;indent-tabs-mode:t;show-trailing-whitespace:t;rm-trailing-spaces:t -*-
// vi: set ts=2 noet:
//
// (c) Copyright Rosetta Commons Member Institutions.
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// (c) The Rosetta software is developed by the contributing members of the Rosetta Commons.
// (c) For more information, see http://www.rosettacommons.org. Questions about this can be
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/// @file basic/database/schema_generator/Constraints.hh
///
/// @brief Constraint class for the schema generator framework
/// @author Tim Jacobs

#ifndef INCLUDED_basic_database_schema_generator_Constraint_HH
#define INCLUDED_basic_database_schema_generator_Constraint_HH

#include <basic/database/schema_generator/Constraint.fwd.hh>

#include <iosfwd>                                              // for string
#include <platform/types.hh>                                   // for Real
#include <utility/sql_database/DatabaseSessionManager.fwd.hh>  // for sessionOP
#include <utility/pointer/ReferenceCount.hh>
#include <basic/database/schema_generator/Column.fwd.hh>

namespace basic {
namespace database {
namespace schema_generator {

class Constraint : public utility::pointer::ReferenceCount
{
public:
  /// @brief Automatically generated virtual destructor for class deriving directly from ReferenceCount
  virtual ~Constraint();

  Constraint(Column column);

  Constraint(Columns columns);

  virtual std::string
  print(
    utility::sql_database::sessionOP
  ) const=0;

protected:

  Columns columns_;
};

//class ComparisonConstraint : public Constraint
//{
//public:
//
// enum ComparisonOperator{
//  GREATER_THAN,
//  LESS_THAN,
//  EQUAL_TO,
//  NOT_EQUAL_TO
// };
//
// ComparisonConstraint(Column column1, int comparison_operator, Column column2);
//
// ComparisonConstraint(Column column, int comparator, std::string value);
//
// ComparisonConstraint(Column, Column);
//
// std::string print();
//
//private:
// std::string string_value;
//
//};

class UniqueConstraint : public Constraint {
public:

  UniqueConstraint(Column column);
  UniqueConstraint(Columns columns);

  std::string
  print(
    utility::sql_database::sessionOP
  ) const;
};

class GreaterThanConstraint : public Constraint {
public:

  GreaterThanConstraint(
    Column column,
    platform::Real value);

  std::string
  print(
    utility::sql_database::sessionOP
  ) const;

private:
  platform::Real value_;
};

} // schema_generator
} // namespace database
} // namespace utility
#endif