mirror of https://github.com/Icinga/icinga2.git
144 lines
3.8 KiB
C++
144 lines
3.8 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef VALUE_H
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#define VALUE_H
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#include "base/object.h"
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#include "base/qstring.h"
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#include <boost/variant/variant.hpp>
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#include <boost/variant/get.hpp>
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struct cJSON;
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namespace icinga
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{
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/**
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* The type of a Value.
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*
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* @ingroup base
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*/
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enum ValueType
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{
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ValueEmpty = 0,
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ValueNumber = 1,
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ValueString = 2,
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ValueObject = 3
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};
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/**
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* A type that can hold an arbitrary value.
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*
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* @ingroup base
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*/
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class I2_BASE_API Value
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{
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public:
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Value(void);
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Value(int value);
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Value(unsigned int value);
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Value(long value);
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Value(unsigned long value);
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Value(double value);
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Value(const String& value);
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Value(const char *value);
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template<typename T>
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inline Value(const shared_ptr<T>& value)
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: m_Value()
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{
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if (!value)
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return;
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m_Value = static_pointer_cast<Object>(value);
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}
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operator double(void) const;
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operator String(void) const;
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bool operator==(int rhs);
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bool operator!=(int rhs);
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bool operator==(double rhs);
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bool operator!=(double rhs);
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bool operator==(const char *rhs);
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bool operator!=(const char *rhs);
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bool operator==(const String& rhs);
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bool operator!=(const String& rhs);
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bool operator==(const Value& rhs);
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bool operator!=(const Value& rhs);
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template<typename T>
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operator shared_ptr<T>(void) const
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{
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if (IsEmpty())
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return shared_ptr<T>();
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shared_ptr<T> object = dynamic_pointer_cast<T>(boost::get<Object::Ptr>(m_Value));
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if (!object)
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BOOST_THROW_EXCEPTION(std::bad_cast());
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return object;
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}
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bool IsEmpty(void) const;
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bool IsScalar(void) const;
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bool IsObject(void) const;
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template<typename T>
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bool IsObjectType(void) const
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{
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if (!IsObject())
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return false;
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return (dynamic_pointer_cast<T>(boost::get<Object::Ptr>(m_Value)) != NULL);
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}
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static Value FromJson(cJSON *json);
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cJSON *ToJson(void) const;
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String Serialize(void) const;
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static Value Deserialize(const String& jsonString);
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ValueType GetType(void) const;
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private:
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boost::variant<boost::blank, double, String, Object::Ptr> m_Value;
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};
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static Value Empty;
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I2_BASE_API Value operator+(const Value& lhs, const char *rhs);
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I2_BASE_API Value operator+(const char *lhs, const Value& rhs);
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I2_BASE_API Value operator+(const Value& lhs, const String& rhs);
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I2_BASE_API Value operator+(const String& lhs, const Value& rhs);
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I2_BASE_API std::ostream& operator<<(std::ostream& stream, const Value& value);
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I2_BASE_API std::istream& operator>>(std::istream& stream, Value& value);
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}
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#endif /* VALUE_H */
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