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/*
* Copyright (C) 2009-2012 Geometer Plus <[email protected]>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#ifndef __DBVALUES_H__
#define __DBVALUES_H__
#include <string>
#include <shared_ptr.h>
class DBValue {
public:
enum ValueType {
DBNULL,
DBINT,
DBREAL,
DBTEXT,
};
static shared_ptr<DBValue> create(ValueType type);
public:
DBValue();
virtual ~DBValue();
public: // to implement:
virtual ValueType type() const = 0;
};
class DBNullValue : public DBValue {
friend class DBValue;
public:
static const shared_ptr<DBValue> Instance; // the only Instance of DBNullValue class
private:
DBNullValue();
~DBNullValue();
public:
ValueType type() const;
};
class DBIntValue : public DBValue {
friend class DBValue;
protected:
DBIntValue();
public:
DBIntValue(int value);
~DBIntValue();
ValueType type() const;
int value() const;
void setValue(int value);
const DBIntValue &operator = (int value);
private:
int myValue;
};
class DBRealValue : public DBValue {
friend class DBValue;
protected:
DBRealValue();
public:
DBRealValue(double value);
~DBRealValue();
ValueType type() const;
double value() const;
void setValue(double value);
const DBRealValue &operator = (double value);
private:
double myValue;
};
class DBTextValue : public DBValue {
friend class DBValue;
protected:
DBTextValue();
public:
DBTextValue(const std::string &value);
~DBTextValue();
ValueType type() const;
const std::string &value() const;
void setValue(const std::string &value);
const DBTextValue &operator = (const std::string &value);
public:
DBTextValue(const DBTextValue &value);
const DBTextValue &operator = (const DBTextValue &value);
private:
std::string myValue;
};
inline int DBIntValue::value() const { return myValue; }
inline void DBIntValue::setValue(int value) { myValue = value; }
inline const DBIntValue &DBIntValue::operator = (int value) { myValue = value; return *this; }
inline double DBRealValue::value() const { return myValue; }
inline void DBRealValue::setValue(double value) { myValue = value; }
inline const DBRealValue &DBRealValue::operator = (double value) { myValue = value; return *this; }
inline const std::string &DBTextValue::value() const { return myValue; }
inline void DBTextValue::setValue(const std::string &value) { myValue = value; }
inline const DBTextValue &DBTextValue::operator = (const std::string &value) { myValue = value; return *this; }
#endif /* __DBVALUES_H__ */
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