C++ class for reading and writing XML structures. No need for a C++ code parser or special pre compiler. Specify a schema entirly in native C++. The schema is verified when XML is read and exceptions are thrown when the XML to be parse is invalid.
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203 lines
7.7 KiB
203 lines
7.7 KiB
/*! @file |
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@id $Id$ |
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taken from boost.org boost::Any |
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*/ |
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// 1 2 3 4 5 6 7 8 |
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// 45678901234567890123456789012345678901234567890123456789012345678901234567890 |
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// See http://www.boost.org/libs/any for Documentation. |
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#ifndef XML_CXX_ANY_INCLUDED |
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#define XML_CXX_ANY_INCLUDED |
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#include <algorithm> |
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#include <typeinfo> |
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#include <stdexcept> |
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namespace xml { |
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class Serialize; |
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//! @cond INTERNAL |
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//! @addtogroup serialization |
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//@{ |
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/*! @defgroup xmlAny (internal) Any Object with limited Polymorfism |
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@internal The implementation of xml::Any is an adaption of @c |
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boost::any (see http://www.boost.org), but instead of |
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holding any element, but without polymorfism, the |
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implementation of xml::Any only holds basic C++ types |
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(@c int, @c long, @c float, ...), plus @c std::string |
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and xml::Serialize. All other non-standard-C++ types |
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are stored as xml::Serialize*. This way, we can get a |
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polymorfic any type, but only for children of |
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xml::Serialize, but in fact, that's all we |
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need. Another limitation is, that xml::Any only stores |
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pointer types. Simply because we don't need more. */ |
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//@{ |
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//! @internal Number of supported types that can be stored as XML. |
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const int MAX_NUM(14); |
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template<int NUM> struct ToType {typedef Serialize Type;}; |
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template<> struct ToType<1> {typedef Serialize Type;}; |
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template<> struct ToType<2> {typedef std::string Type;}; |
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template<> struct ToType<3> {typedef bool Type;}; |
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template<> struct ToType<4> {typedef unsigned char Type;}; |
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template<> struct ToType<5> {typedef signed char Type;}; |
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template<> struct ToType<6> {typedef char Type;}; |
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template<> struct ToType<7> {typedef unsigned short Type;}; |
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template<> struct ToType<8> {typedef signed short Type;}; |
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template<> struct ToType<9> {typedef unsigned int Type;}; |
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template<> struct ToType<10> {typedef signed int Type;}; |
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template<> struct ToType<11> {typedef unsigned long Type;}; |
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template<> struct ToType<12> {typedef signed long Type;}; |
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template<> struct ToType<13> {typedef float Type;}; |
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template<> struct ToType<14> {typedef double Type;}; |
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template<typename T> struct ToNum {static const int NUM = 1;}; |
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template<> struct ToNum<Serialize > {static const int NUM = 1;}; |
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template<> struct ToNum<std::string > {static const int NUM = 2;}; |
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template<> struct ToNum<bool > {static const int NUM = 3;}; |
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template<> struct ToNum<unsigned char > {static const int NUM = 4;}; |
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template<> struct ToNum<signed char > {static const int NUM = 5;}; |
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template<> struct ToNum< char > {static const int NUM = 6;}; |
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template<> struct ToNum<unsigned short> {static const int NUM = 7;}; |
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template<> struct ToNum<signed short> {static const int NUM = 8;}; |
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template<> struct ToNum<unsigned int > {static const int NUM = 9;}; |
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template<> struct ToNum<signed int > {static const int NUM = 10;}; |
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template<> struct ToNum<unsigned long > {static const int NUM = 11;}; |
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template<> struct ToNum<signed long > {static const int NUM = 12;}; |
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template<> struct ToNum<float > {static const int NUM = 13;}; |
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template<> struct ToNum<double > {static const int NUM = 14;}; |
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template<typename T> bool isSerialize() { |
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return ToNum<T>::NUM == 1; |
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} |
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template <typename T, bool GOOD=(ToNum<T>::NUM==1)> struct Mapper { |
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static Serialize* toSerialize(T& obj) { |
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return 0; |
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} |
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}; |
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template <typename T> struct Mapper<T, true> { |
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static Serialize* toSerialize(T& obj) { |
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return dynamic_cast<Serialize*>(&obj); |
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} |
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}; |
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class Any { |
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public: |
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Any(): _content(0) {} |
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template<typename TYPE> Any(TYPE* value): |
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_content(new Holder<TYPE>(value)) { |
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} |
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Any(const Any& other): |
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_content(other._content?other._content->clone():0) { |
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} |
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~Any() { |
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delete _content; |
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} |
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Any& swap(Any& rhs) { |
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std::swap(_content, rhs._content); |
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return *this; |
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} |
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template<typename TYPE> Any& operator=(TYPE* rhs) { |
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Any(rhs).swap(*this); |
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return *this; |
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} |
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Any& operator=(const Any& rhs) { |
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Any(rhs).swap(*this); |
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return *this; |
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} |
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bool empty() const { |
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return !_content; |
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} |
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const std::type_info& type() const { |
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return _content?_content->type():typeid(void); |
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} |
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class Placeholder { |
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public: |
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virtual ~Placeholder() {} |
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virtual const std::type_info& type() const = 0; |
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virtual Placeholder* clone() const = 0; |
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}; |
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template<typename TYPE> class Holder: public Placeholder { |
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public: |
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Holder(typename ToType<ToNum<TYPE>::NUM>::Type* value): |
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_held(value) { |
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} |
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virtual const std::type_info& type() const { |
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return typeid(typename ToType<ToNum<TYPE>::NUM>::Type); |
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} |
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virtual Placeholder* clone() const { |
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return new Holder(_held); |
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} |
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typename ToType<ToNum<TYPE>::NUM>::Type* _held; |
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}; |
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private: |
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template<typename TYPE> friend TYPE* any_cast(Any*); |
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template<typename TYPE> friend TYPE* any_cast(Any&); |
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Placeholder* _content; |
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}; |
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template<typename TYPE> TYPE* any_cast(Any* operand) { |
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return operand && operand->type() == typeid(TYPE) |
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? static_cast<Any::Holder<TYPE>*>(operand->_content)->_held |
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: 0; |
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} |
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template<typename TYPE> const TYPE* any_cast(const Any* operand) { |
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return any_cast<TYPE>(const_cast<Any*>(operand)); |
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} |
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template<typename TYPE> TYPE* any_cast(Any& operand) { |
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if (operand.type()==typeid(TYPE)) |
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return static_cast<Any::Holder<TYPE>*>(operand._content)->_held; |
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throw std::bad_cast(); |
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} |
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template<typename TYPE> const TYPE* any_cast(const Any& operand) { |
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return any_cast<TYPE>(const_cast<Any&>(operand)); |
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} |
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//@} |
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//@} |
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//! @endcond INTERNAL |
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} |
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// Note for this file only (this file is in large parts taken from boost): |
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// Copyright Kevlin Henney, 2000, 2001, 2002. All rights reserved. |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// Boost Software License - Version 1.0 - August 17th, 2003 |
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// Permission is hereby granted, free of charge, to any person or organization |
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// obtaining a copy of the software and accompanying documentation covered by |
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// this license (the "Software") to use, reproduce, display, distribute, |
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// execute, and transmit the Software, and to prepare derivative works of the |
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// Software, and to permit third-parties to whom the Software is furnished to |
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// do so, all subject to the following: |
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// The copyright notices in the Software and this entire statement, including |
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// the above license grant, this restriction and the following disclaimer, |
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// must be included in all copies of the Software, in whole or in part, and |
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// all derivative works of the Software, unless such copies or derivative |
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// works are solely in the form of machine-executable object code generated by |
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// a source language processor. |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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// DEALINGS IN THE SOFTWARE. |
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#endif
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