mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
263 lines
7.7 KiB
C++
263 lines
7.7 KiB
C++
//
|
|
// Pair.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: Dynamic
|
|
// Module: Pair
|
|
//
|
|
// Definition of the Pair class.
|
|
//
|
|
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_Pair_INCLUDED
|
|
#define Foundation_Pair_INCLUDED
|
|
|
|
|
|
#include <utility>
|
|
#include "Poco/Dynamic/Var.h"
|
|
#include "Poco/Dynamic/VarHolder.h"
|
|
#include "Poco/Foundation.h"
|
|
|
|
|
|
namespace Poco
|
|
{
|
|
namespace Dynamic
|
|
{
|
|
|
|
|
|
template <typename K>
|
|
class Pair
|
|
/// Pair allows to define a pair of values.
|
|
{
|
|
public:
|
|
typedef typename std::pair<K, Var> Data;
|
|
|
|
Pair() : _data()
|
|
/// Creates an empty Pair
|
|
{
|
|
}
|
|
|
|
Pair(const Pair & other) : _data(other._data)
|
|
/// Creates the Pair from another pair.
|
|
{
|
|
}
|
|
|
|
Pair(const Data & val) : _data(val)
|
|
/// Creates the Pair from the given value.
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
Pair(const std::pair<K, T> & val) : _data(std::make_pair(val.first, val.second))
|
|
/// Creates Pair form standard pair.
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
Pair(const K & first, const T & second) : _data(std::make_pair(first, second))
|
|
/// Creates pair from two values.
|
|
{
|
|
}
|
|
|
|
virtual ~Pair()
|
|
/// Destroys the Pair.
|
|
{
|
|
}
|
|
|
|
Pair & swap(Pair & other)
|
|
/// Swaps the content of the two Pairs.
|
|
{
|
|
std::swap(_data, other._data);
|
|
return *this;
|
|
}
|
|
|
|
Pair & operator=(const Pair & other)
|
|
/// Copy constructs Pair from another pair.
|
|
{
|
|
Pair(other).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
inline const K & first() const
|
|
/// Returns the first member of the pair.
|
|
{
|
|
return _data.first;
|
|
}
|
|
|
|
inline const Var & second() const
|
|
/// Returns the second member of the pair.
|
|
{
|
|
return _data.second;
|
|
}
|
|
|
|
std::string toString()
|
|
{
|
|
std::string str;
|
|
Var(*this).convert<std::string>(str);
|
|
return str;
|
|
}
|
|
|
|
private:
|
|
Data _data;
|
|
};
|
|
|
|
|
|
template <>
|
|
class VarHolderImpl<Pair<std::string>> : public VarHolder
|
|
{
|
|
public:
|
|
VarHolderImpl(const Pair<std::string> & val) : _val(val) { }
|
|
|
|
~VarHolderImpl() { }
|
|
|
|
const std::type_info & type() const { return typeid(Pair<std::string>); }
|
|
|
|
void convert(Int8 & val) const { throw BadCastException("Cannot cast Pair type to Int8"); }
|
|
|
|
void convert(Int16 & val) const { throw BadCastException("Cannot cast Pair type to Int16"); }
|
|
|
|
void convert(Int32 & val) const { throw BadCastException("Cannot cast Pair type to Int32"); }
|
|
|
|
void convert(Int64 & val) const { throw BadCastException("Cannot cast Pair type to Int64"); }
|
|
|
|
void convert(UInt8 & val) const { throw BadCastException("Cannot cast Pair type to UInt8"); }
|
|
|
|
void convert(UInt16 & val) const { throw BadCastException("Cannot cast Pair type to UInt16"); }
|
|
|
|
void convert(UInt32 & val) const { throw BadCastException("Cannot cast Pair type to UInt32"); }
|
|
|
|
void convert(UInt64 & val) const { throw BadCastException("Cannot cast Pair type to UInt64"); }
|
|
|
|
void convert(bool & val) const { throw BadCastException("Cannot cast Pair type to bool"); }
|
|
|
|
void convert(float & val) const { throw BadCastException("Cannot cast Pair type to float"); }
|
|
|
|
void convert(double & val) const { throw BadCastException("Cannot cast Pair type to double"); }
|
|
|
|
void convert(char & val) const { throw BadCastException("Cannot cast Pair type to char"); }
|
|
|
|
void convert(std::string & val) const
|
|
{
|
|
// Serialize in JSON format: equals an object
|
|
// JSON format definition: { string ':' value } string:value pair n-times, sep. by ','
|
|
val.append("{ ");
|
|
Var key(_val.first());
|
|
Impl::appendJSONKey(val, key);
|
|
val.append(" : ");
|
|
Impl::appendJSONValue(val, _val.second());
|
|
val.append(" }");
|
|
}
|
|
|
|
void convert(Poco::DateTime &) const { throw BadCastException("Pair -> Poco::DateTime"); }
|
|
|
|
void convert(Poco::LocalDateTime &) const { throw BadCastException("Pair -> Poco::LocalDateTime"); }
|
|
|
|
void convert(Poco::Timestamp &) const { throw BadCastException("Pair -> Poco::Timestamp"); }
|
|
|
|
VarHolder * clone(Placeholder<VarHolder> * pVarHolder = 0) const { return cloneHolder(pVarHolder, _val); }
|
|
|
|
const Pair<std::string> & value() const { return _val; }
|
|
|
|
bool isArray() const { return false; }
|
|
|
|
bool isStruct() const { return false; }
|
|
|
|
bool isInteger() const { return false; }
|
|
|
|
bool isSigned() const { return false; }
|
|
|
|
bool isNumeric() const { return false; }
|
|
|
|
bool isString() const { return false; }
|
|
|
|
private:
|
|
Pair<std::string> _val;
|
|
};
|
|
|
|
|
|
template <>
|
|
class VarHolderImpl<Pair<int>> : public VarHolder
|
|
{
|
|
public:
|
|
VarHolderImpl(const Pair<int> & val) : _val(val) { }
|
|
|
|
~VarHolderImpl() { }
|
|
|
|
const std::type_info & type() const { return typeid(Pair<int>); }
|
|
|
|
void convert(Int8 & val) const { throw BadCastException("Cannot cast Pair type to Int8"); }
|
|
|
|
void convert(Int16 & val) const { throw BadCastException("Cannot cast Pair type to Int16"); }
|
|
|
|
void convert(Int32 & val) const { throw BadCastException("Cannot cast Pair type to Int32"); }
|
|
|
|
void convert(Int64 & val) const { throw BadCastException("Cannot cast Pair type to Int64"); }
|
|
|
|
void convert(UInt8 & val) const { throw BadCastException("Cannot cast Pair type to UInt8"); }
|
|
|
|
void convert(UInt16 & val) const { throw BadCastException("Cannot cast Pair type to UInt16"); }
|
|
|
|
void convert(UInt32 & val) const { throw BadCastException("Cannot cast Pair type to UInt32"); }
|
|
|
|
void convert(UInt64 & val) const { throw BadCastException("Cannot cast Pair type to UInt64"); }
|
|
|
|
void convert(bool & val) const { throw BadCastException("Cannot cast Pair type to bool"); }
|
|
|
|
void convert(float & val) const { throw BadCastException("Cannot cast Pair type to float"); }
|
|
|
|
void convert(double & val) const { throw BadCastException("Cannot cast Pair type to double"); }
|
|
|
|
void convert(char & val) const { throw BadCastException("Cannot cast Pair type to char"); }
|
|
|
|
void convert(std::string & val) const
|
|
{
|
|
// Serialize in JSON format: equals an object
|
|
// JSON format definition: { string ':' value } string:value pair n-times, sep. by ','
|
|
val.append("{ ");
|
|
Var key(_val.first());
|
|
Impl::appendJSONKey(val, key);
|
|
val.append(" : ");
|
|
Impl::appendJSONValue(val, _val.second());
|
|
val.append(" }");
|
|
}
|
|
|
|
void convert(Poco::DateTime &) const { throw BadCastException("Pair -> Poco::DateTime"); }
|
|
|
|
void convert(Poco::LocalDateTime &) const { throw BadCastException("Pair -> Poco::LocalDateTime"); }
|
|
|
|
void convert(Poco::Timestamp &) const { throw BadCastException("Pair -> Poco::Timestamp"); }
|
|
|
|
VarHolder * clone(Placeholder<VarHolder> * pVarHolder = 0) const { return cloneHolder(pVarHolder, _val); }
|
|
|
|
const Pair<int> & value() const { return _val; }
|
|
|
|
bool isArray() const { return false; }
|
|
|
|
bool isStruct() const { return false; }
|
|
|
|
bool isInteger() const { return false; }
|
|
|
|
bool isSigned() const { return false; }
|
|
|
|
bool isNumeric() const { return false; }
|
|
|
|
bool isString() const { return false; }
|
|
|
|
private:
|
|
Pair<int> _val;
|
|
};
|
|
|
|
|
|
} // namespace Dynamic
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_Pair_INCLUDED
|