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/*************************************************************************** |
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* * |
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* Copyright (C) 2017 Christian Schoenebeck * |
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* <cuse@users.sourceforge.net> * |
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* * |
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* This library is part of libgig. * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library 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 library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#ifndef LIBGIG_SERIALIZATION_H |
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#define LIBGIG_SERIALIZATION_H |
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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#include <stdint.h> |
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#include <stdio.h> |
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#include <typeinfo> |
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#include <string> |
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#include <vector> |
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#include <map> |
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#include <time.h> |
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/** @brief Serialization / deserialization framework. |
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* |
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* See class Archive as starting point for how to implement serialization and |
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* deserialization with your application. |
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* |
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* The classes in this namespace allow to serialize and deserialize native |
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* C++ objects in a portable, easy and flexible way. Serialization is a |
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* technique that allows to transform the current state and data of native |
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* (in this case C++) objects into a data stream (including all other objects |
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* the "serialized" objects relate to); the data stream may then be sent over |
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* "wire" (for example via network connection to another computer, which might |
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* also have a different OS, CPU architecture, native memory word size and |
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* endian type); and finally the data stream would be "deserialized" on that |
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* receiver side, that is transformed again to modify all objects and data |
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* structures on receiver side to resemble the objects' state and data as it |
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* was originally on sender side. |
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* |
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* In contrast to many other already existing serialization frameworks, this |
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* implementation has a strong focus on robustness regarding long-term changes |
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* to the serialized C++ classes of the serialized objects. So even if sender |
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* and receiver are using different versions of their serialized/deserialized |
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* C++ classes, structures and data types (thus having different data structure |
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* layout to a certain extent), this framework aims trying to automatically |
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* adapt its serialization and deserialization process in that case so that |
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* the deserialized objects on receiver side would still reflect the overall |
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* expected states and overall data as intended by the sender. For being able to |
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* do so, this framework stores all kind of additional information about each |
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* serialized object and each data structure member (for example name of each |
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* data structure member, but also the offset of each member within its |
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* containing data structure, precise data types, and more). |
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* |
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* Like most other serialization frameworks, this frameworks does not require a |
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* tree-structured layout of the serialized data structures. So it automatically |
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* handles also cyclic dependencies between serialized data structures |
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* correctly, without i.e. causing endless recursion or redundancy. |
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* |
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* Additionally this framework also allows partial deserialization. Which means |
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* the receiver side may for example decide that it wants to restrict |
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* deserialization so that it would only modify certain objects or certain |
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* members by the deserialization process, leaving all other ones untouched. |
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* So this partial deserialization technique for example allows to implement |
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* flexible preset features for applications in a powerful and easy way. |
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*/ |
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namespace Serialization { |
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// just symbol prototyping |
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class DataType; |
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class Object; |
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class Member; |
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class Archive; |
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class ObjectPool; |
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class Exception; |
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typedef std::string String; |
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typedef std::vector<uint8_t> RawData; |
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typedef void* ID; |
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typedef uint32_t Version; |
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enum operation_t { |
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OPERATION_NONE, |
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OPERATION_SERIALIZE, |
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OPERATION_DESERIALIZE |
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}; |
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enum time_base_t { |
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LOCAL_TIME, |
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UTC_TIME |
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}; |
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template<typename T> |
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bool IsEnum(const T& data) { |
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return __is_enum(T); |
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} |
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template<typename T> |
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bool IsUnion(const T& data) { |
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return __is_union(T); |
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} |
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template<typename T> |
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bool IsClass(const T& data) { |
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return __is_class(T); |
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} |
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/*template<typename T> |
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bool IsTrivial(T data) { |
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return __is_trivial(T); |
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}*/ |
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/*template<typename T> |
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bool IsPOD(T data) { |
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return __is_pod(T); |
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}*/ |
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/** @brief Unique identifier for one specific C++ object, member or fundamental variable. |
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* |
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* Reflects a unique identifier for one specific serialized C++ class |
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* instance, struct instance, member, primitive pointer, or fundamental |
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* variables. |
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*/ |
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class UID { |
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public: |
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ID id; |
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size_t size; |
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bool isValid() const; |
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operator bool() const { return isValid(); } |
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//bool operator()() const { return isValid(); } |
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bool operator==(const UID& other) const { return id == other.id && size == other.size; } |
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bool operator!=(const UID& other) const { return id != other.id || size != other.size; } |
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bool operator<(const UID& other) const { return id < other.id || (id == other.id && size < other.size); } |
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bool operator>(const UID& other) const { return id > other.id || (id == other.id && size > other.size); } |
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template<typename T> |
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static UID from(const T& obj) { |
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return Resolver<T>::resolve(obj); |
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} |
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protected: |
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// UID resolver for non-pointer types |
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template<typename T> |
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struct Resolver { |
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static UID resolve(const T& obj) { |
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return (UID) { (ID) &obj, sizeof(obj) }; |
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} |
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}; |
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// UID resolver for pointer types (of 1st degree) |
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template<typename T> |
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struct Resolver<T*> { |
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static UID resolve(const T* const & obj) { |
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return (UID) { (ID) obj, sizeof(*obj) }; |
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} |
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}; |
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}; |
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/** |
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* Reflects an invalid UID and behaves similar to NULL as invalid value for |
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* pointer types. |
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*/ |
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extern const UID NO_UID; |
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typedef std::vector<UID> UIDChain; |
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// prototyping of private internal friend functions |
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static String _encodePrimitiveValue(const Object& obj); |
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static DataType _popDataTypeBlob(const char*& p, const char* end); |
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static Member _popMemberBlob(const char*& p, const char* end); |
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static Object _popObjectBlob(const char*& p, const char* end); |
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static void _popPrimitiveValue(const char*& p, const char* end, Object& obj); |
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static String _primitiveObjectValueToString(const Object& obj); |
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/** @brief Abstract reflection of a native C++ data type. |
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* |
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* Provides detailed information about a C++ data type, whether it is a |
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* fundamental C/C++ data type (like int, float, char, etc.) or custom |
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* defined data type like a C++ class, struct, enum, as well as other |
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* features of the data type like its native memory size and more. |
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*/ |
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class DataType { |
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public: |
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DataType(); |
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size_t size() const { return m_size; } |
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bool isValid() const; |
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bool isPointer() const; |
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bool isClass() const; |
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bool isPrimitive() const; |
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bool isInteger() const; |
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bool isReal() const; |
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bool isBool() const; |
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bool isEnum() const; |
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bool isSigned() const; |
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operator bool() const { return isValid(); } |
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//bool operator()() const { return isValid(); } |
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bool operator==(const DataType& other) const; |
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bool operator!=(const DataType& other) const; |
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bool operator<(const DataType& other) const; |
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bool operator>(const DataType& other) const; |
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String asLongDescr() const; |
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String baseTypeName() const { return m_baseTypeName; } |
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String customTypeName() const { return m_customTypeName; } |
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template<typename T> |
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static DataType dataTypeOf(const T& data) { |
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return Resolver<T>::resolve(data); |
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} |
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protected: |
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DataType(bool isPointer, int size, String baseType, String customType = ""); |
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template<typename T, bool T_isPointer> |
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struct ResolverBase { |
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static DataType resolve(const T& data) { |
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const std::type_info& type = typeid(data); |
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const int sz = sizeof(data); |
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// for primitive types we are using our own type names instead of |
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// using std:::type_info::name(), because the precise output of the |
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// latter may vary between compilers |
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if (type == typeid(int8_t)) return DataType(T_isPointer, sz, "int8"); |
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if (type == typeid(uint8_t)) return DataType(T_isPointer, sz, "uint8"); |
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if (type == typeid(int16_t)) return DataType(T_isPointer, sz, "int16"); |
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if (type == typeid(uint16_t)) return DataType(T_isPointer, sz, "uint16"); |
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if (type == typeid(int32_t)) return DataType(T_isPointer, sz, "int32"); |
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if (type == typeid(uint32_t)) return DataType(T_isPointer, sz, "uint32"); |
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if (type == typeid(int64_t)) return DataType(T_isPointer, sz, "int64"); |
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if (type == typeid(uint64_t)) return DataType(T_isPointer, sz, "uint64"); |
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if (type == typeid(bool)) return DataType(T_isPointer, sz, "bool"); |
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if (type == typeid(float)) return DataType(T_isPointer, sz, "real32"); |
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if (type == typeid(double)) return DataType(T_isPointer, sz, "real64"); |
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if (IsEnum(data)) return DataType(T_isPointer, sz, "enum", rawCppTypeNameOf(data)); |
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if (IsUnion(data)) return DataType(T_isPointer, sz, "union", rawCppTypeNameOf(data)); |
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if (IsClass(data)) return DataType(T_isPointer, sz, "class", rawCppTypeNameOf(data)); |
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return DataType(); |
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} |
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}; |
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// DataType resolver for non-pointer types |
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template<typename T> |
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struct Resolver : ResolverBase<T,false> { |
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static DataType resolve(const T& data) { |
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return ResolverBase<T,false>::resolve(data); |
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} |
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}; |
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// DataType resolver for pointer types (of 1st degree) |
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template<typename T> |
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struct Resolver<T*> : ResolverBase<T,true> { |
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static DataType resolve(const T*& data) { |
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return ResolverBase<T,true>::resolve(*data); |
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} |
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}; |
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template<typename T> |
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static String rawCppTypeNameOf(const T& data) { |
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#if defined _MSC_VER // Microsoft compiler ... |
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# warning type_info::raw_name() demangling has not been tested yet with Microsoft compiler! Feedback appreciated! |
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String name = typeid(data).raw_name(); //NOTE: I haven't checked yet what MSC actually outputs here exactly |
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#else // i.e. especially GCC and clang ... |
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String name = typeid(data).name(); |
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#endif |
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//while (!name.empty() && name[0] >= 0 && name[0] <= 9) |
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// name = name.substr(1); |
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return name; |
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} |
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private: |
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String m_baseTypeName; |
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String m_customTypeName; |
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int m_size; |
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bool m_isPointer; |
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friend DataType _popDataTypeBlob(const char*& p, const char* end); |
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friend class Archive; |
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}; |
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/** @brief Abstract reflection of a native C++ class/struct's member variable. |
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* |
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* Provides detailed information about a specific C++ member variable of |
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* serialized C++ object, like its C++ data type, offset of this member |
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* within its containing data structure/class, its C++ member variable name |
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* and more. |
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*/ |
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class Member { |
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public: |
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Member(); |
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UID uid() const { return m_uid; } |
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String name() const { return m_name; } |
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size_t offset() const { return m_offset; } |
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const DataType& type() const { return m_type; } |
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bool isValid() const; |
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operator bool() const { return isValid(); } |
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//bool operator()() const { return isValid(); } |
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bool operator==(const Member& other) const; |
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bool operator!=(const Member& other) const; |
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bool operator<(const Member& other) const; |
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bool operator>(const Member& other) const; |
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protected: |
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Member(String name, UID uid, size_t offset, DataType type); |
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friend class Archive; |
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private: |
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UID m_uid; |
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size_t m_offset; |
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String m_name; |
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DataType m_type; |
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friend Member _popMemberBlob(const char*& p, const char* end); |
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}; |
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/** @brief Abstract reflection of a native C++ class/struct instance. |
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* |
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* Provides detailed information about a specific serialized C++ object, |
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* like its C++ member variables, its C++ class/struct name, its native |
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* memory size and more. |
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*/ |
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class Object { |
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public: |
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Object(); |
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Object(UIDChain uidChain, DataType type); |
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UID uid(int index = 0) const { |
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return (index < m_uid.size()) ? m_uid[index] : NO_UID; |
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} |
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const UIDChain& uidChain() const { return m_uid; } |
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const DataType& type() const { return m_type; } |
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const RawData& rawData() const { return m_data; } |
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Version version() const { return m_version; } |
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void setVersion(Version v) { |
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m_version = v; |
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} |
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Version minVersion() const { return m_minVersion; } |
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void setMinVersion(Version v) { |
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m_minVersion = v; |
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} |
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bool isVersionCompatibleTo(const Object& other) const; |
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std::vector<Member>& members() { return m_members; } |
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const std::vector<Member>& members() const { return m_members; } |
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Member memberNamed(String name) const; |
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Member memberByUID(const UID& uid) const; |
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std::vector<Member> membersOfType(const DataType& type) const; |
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int sequenceIndexOf(const Member& member) const; |
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bool isValid() const; |
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|
|
operator bool() const { return isValid(); } |
376 |
|
|
//bool operator()() const { return isValid(); } |
377 |
|
|
bool operator==(const Object& other) const; |
378 |
|
|
bool operator!=(const Object& other) const; |
379 |
|
|
bool operator<(const Object& other) const; |
380 |
|
|
bool operator>(const Object& other) const; |
381 |
|
|
|
382 |
schoenebeck |
3153 |
protected: |
383 |
|
|
void remove(const Member& member); |
384 |
|
|
|
385 |
schoenebeck |
3138 |
private: |
386 |
|
|
DataType m_type; |
387 |
|
|
UIDChain m_uid; |
388 |
|
|
Version m_version; |
389 |
|
|
Version m_minVersion; |
390 |
|
|
RawData m_data; |
391 |
|
|
std::vector<Member> m_members; |
392 |
|
|
|
393 |
schoenebeck |
3150 |
friend String _encodePrimitiveValue(const Object& obj); |
394 |
schoenebeck |
3138 |
friend Object _popObjectBlob(const char*& p, const char* end); |
395 |
|
|
friend void _popPrimitiveValue(const char*& p, const char* end, Object& obj); |
396 |
schoenebeck |
3150 |
friend String _primitiveObjectValueToString(const Object& obj); |
397 |
|
|
friend class Archive; |
398 |
schoenebeck |
3138 |
}; |
399 |
|
|
|
400 |
|
|
/** @brief Destination container for serialization, and source container for deserialization. |
401 |
|
|
* |
402 |
|
|
* This is the main class for implementing serialization and deserialization |
403 |
|
|
* with your C++ application. This framework does not require a a tree |
404 |
|
|
* structured layout of your C++ objects being serialized/deserialized, it |
405 |
|
|
* uses a concept of a "root" object though. So to start serialization |
406 |
|
|
* construct an empty Archive object and then instruct it to serialize your |
407 |
|
|
* C++ objects by pointing it to your "root" object: |
408 |
|
|
* @code |
409 |
|
|
* Archive a; |
410 |
|
|
* a.serialize(&myRootObject); |
411 |
schoenebeck |
3142 |
* @endcode |
412 |
schoenebeck |
3138 |
* Or if you prefer the look of operator based code: |
413 |
|
|
* @code |
414 |
|
|
* Archive a; |
415 |
|
|
* a << myRootObject; |
416 |
schoenebeck |
3142 |
* @endcode |
417 |
schoenebeck |
3138 |
* The Archive object will then serialize all members of the passed C++ |
418 |
|
|
* object, and will recursively serialize all other C++ objects which it |
419 |
|
|
* contains or points to. So the root object is the starting point for the |
420 |
|
|
* overall serialization. After the serialize() method returned, you can |
421 |
|
|
* then access the serialized data stream by calling rawData() and send that |
422 |
|
|
* data stream over "wire", or store it on disk or whatever you may intend |
423 |
|
|
* to do with it. |
424 |
|
|
* |
425 |
|
|
* Then on receiver side likewise, you create a new Archive object, pass the |
426 |
|
|
* received data stream i.e. via constructor to the Archive object and call |
427 |
|
|
* deserialize() by pointing it to the root object on receiver side: |
428 |
|
|
* @code |
429 |
|
|
* Archive a(rawDataStream); |
430 |
|
|
* a.deserialize(&myRootObject); |
431 |
schoenebeck |
3142 |
* @endcode |
432 |
schoenebeck |
3138 |
* Or with operator instead: |
433 |
|
|
* @code |
434 |
|
|
* Archive a(rawDataStream); |
435 |
|
|
* a >> myRootObject; |
436 |
schoenebeck |
3142 |
* @endcode |
437 |
schoenebeck |
3138 |
* Now this framework automatically handles serialization and |
438 |
|
|
* deserialization of fundamental data types automatically for you (like |
439 |
|
|
* i.e. char, int, long int, float, double, etc.). However for your own |
440 |
|
|
* custom C++ classes and structs you must implement one method which |
441 |
|
|
* defines which members of your class should actually be serialized and |
442 |
|
|
* deserialized. That method to be added must have the following signature: |
443 |
|
|
* @code |
444 |
|
|
* void serialize(Serialization::Archive* archive); |
445 |
|
|
* @endcode |
446 |
|
|
* So let's say you have the following simple data structures: |
447 |
|
|
* @code |
448 |
|
|
* struct Foo { |
449 |
|
|
* int a; |
450 |
|
|
* bool b; |
451 |
|
|
* double c; |
452 |
|
|
* }; |
453 |
|
|
* |
454 |
|
|
* struct Bar { |
455 |
|
|
* char one; |
456 |
|
|
* float two; |
457 |
|
|
* Foo foo1; |
458 |
|
|
* Foo* pFoo2; |
459 |
|
|
* Foo* pFoo3DontTouchMe; // shall not be serialized/deserialized |
460 |
|
|
* }; |
461 |
|
|
* @endcode |
462 |
|
|
* So in order to be able to serialize and deserialize objects of those two |
463 |
|
|
* structures you would first add the mentioned method to each struct |
464 |
|
|
* definition (i.e. in your header file): |
465 |
|
|
* @code |
466 |
|
|
* struct Foo { |
467 |
|
|
* int a; |
468 |
|
|
* bool b; |
469 |
|
|
* double c; |
470 |
|
|
* |
471 |
|
|
* void serialize(Serialization::Archive* archive); |
472 |
|
|
* }; |
473 |
|
|
* |
474 |
|
|
* struct Bar { |
475 |
|
|
* char one; |
476 |
|
|
* float two; |
477 |
|
|
* Foo foo1; |
478 |
|
|
* Foo* pFoo2; |
479 |
|
|
* Foo* pFoo3DontTouchMe; // shall not be serialized/deserialized |
480 |
|
|
* |
481 |
|
|
* void serialize(Serialization::Archive* archive); |
482 |
|
|
* }; |
483 |
|
|
* @endcode |
484 |
|
|
* And then you would implement those two new methods like this (i.e. in |
485 |
|
|
* your .cpp file): |
486 |
|
|
* @code |
487 |
|
|
* #define SRLZ(member) \ |
488 |
|
|
* archive->serializeMember(*this, member, #member); |
489 |
|
|
* |
490 |
|
|
* void Foo::serialize(Serialization::Archive* archive) { |
491 |
|
|
* SRLZ(a); |
492 |
|
|
* SRLZ(b); |
493 |
|
|
* SRLZ(c); |
494 |
|
|
* } |
495 |
|
|
* |
496 |
|
|
* void Bar::serialize(Serialization::Archive* archive) { |
497 |
|
|
* SRLZ(one); |
498 |
|
|
* SRLZ(two); |
499 |
|
|
* SRLZ(foo1); |
500 |
|
|
* SRLZ(pFoo2); |
501 |
|
|
* // leaving out pFoo3DontTouchMe here |
502 |
|
|
* } |
503 |
|
|
* @endcode |
504 |
|
|
* Now when you serialize such a Bar object, this framework will also |
505 |
|
|
* automatically serialize the respective Foo object(s) accordingly, also |
506 |
|
|
* for the pFoo2 pointer for instance (as long as it is not a NULL pointer |
507 |
|
|
* that is). |
508 |
|
|
* |
509 |
|
|
* Note that there is only one method that you need to implement. So the |
510 |
|
|
* respective serialize() method implementation of your classes/structs are |
511 |
|
|
* both called for serialization, as well as for deserialization! |
512 |
|
|
*/ |
513 |
|
|
class Archive { |
514 |
|
|
public: |
515 |
|
|
Archive(); |
516 |
|
|
Archive(const RawData& data); |
517 |
|
|
Archive(const uint8_t* data, size_t size); |
518 |
|
|
virtual ~Archive(); |
519 |
|
|
|
520 |
|
|
template<typename T> |
521 |
|
|
void serialize(const T* obj) { |
522 |
|
|
m_operation = OPERATION_SERIALIZE; |
523 |
|
|
m_allObjects.clear(); |
524 |
|
|
m_rawData.clear(); |
525 |
|
|
m_root = UID::from(obj); |
526 |
|
|
const_cast<T*>(obj)->serialize(this); |
527 |
|
|
encode(); |
528 |
|
|
m_operation = OPERATION_NONE; |
529 |
|
|
} |
530 |
|
|
|
531 |
|
|
template<typename T> |
532 |
|
|
void deserialize(T* obj) { |
533 |
|
|
Archive a; |
534 |
|
|
m_operation = OPERATION_DESERIALIZE; |
535 |
|
|
obj->serialize(&a); |
536 |
|
|
a.m_root = UID::from(obj); |
537 |
|
|
Syncer s(a, *this); |
538 |
|
|
m_operation = OPERATION_NONE; |
539 |
|
|
} |
540 |
|
|
|
541 |
|
|
template<typename T> |
542 |
|
|
void operator<<(const T& obj) { |
543 |
|
|
serialize(&obj); |
544 |
|
|
} |
545 |
|
|
|
546 |
|
|
template<typename T> |
547 |
|
|
void operator>>(T& obj) { |
548 |
|
|
deserialize(&obj); |
549 |
|
|
} |
550 |
|
|
|
551 |
schoenebeck |
3150 |
const RawData& rawData(); |
552 |
schoenebeck |
3138 |
virtual String rawDataFormat() const; |
553 |
|
|
|
554 |
|
|
template<typename T_classType, typename T_memberType> |
555 |
|
|
void serializeMember(const T_classType& nativeObject, const T_memberType& nativeMember, const char* memberName) { |
556 |
|
|
const size_t offset = |
557 |
|
|
((const uint8_t*)(const void*)&nativeMember) - |
558 |
|
|
((const uint8_t*)(const void*)&nativeObject); |
559 |
|
|
const UIDChain uids = UIDChainResolver<T_memberType>(nativeMember); |
560 |
|
|
const DataType type = DataType::dataTypeOf(nativeMember); |
561 |
|
|
const Member member(memberName, uids[0], offset, type); |
562 |
|
|
const UID parentUID = UID::from(nativeObject); |
563 |
|
|
Object& parent = m_allObjects[parentUID]; |
564 |
|
|
if (!parent) { |
565 |
|
|
const UIDChain uids = UIDChainResolver<T_classType>(nativeObject); |
566 |
|
|
const DataType type = DataType::dataTypeOf(nativeObject); |
567 |
|
|
parent = Object(uids, type); |
568 |
|
|
} |
569 |
|
|
parent.members().push_back(member); |
570 |
|
|
const Object obj(uids, type); |
571 |
|
|
const bool bExistsAlready = m_allObjects.count(uids[0]); |
572 |
|
|
const bool isValidObject = obj; |
573 |
|
|
const bool bExistingObjectIsInvalid = !m_allObjects[uids[0]]; |
574 |
|
|
if (!bExistsAlready || (bExistingObjectIsInvalid && isValidObject)) { |
575 |
|
|
m_allObjects[uids[0]] = obj; |
576 |
|
|
// recurse serialization for all members of this member |
577 |
|
|
// (only for struct/class types, noop for primitive types) |
578 |
|
|
SerializationRecursion<T_memberType>::serializeObject(this, nativeMember); |
579 |
|
|
} |
580 |
|
|
} |
581 |
|
|
|
582 |
|
|
virtual void decode(const RawData& data); |
583 |
|
|
virtual void decode(const uint8_t* data, size_t size); |
584 |
|
|
void clear(); |
585 |
schoenebeck |
3150 |
bool isModified() const; |
586 |
schoenebeck |
3153 |
void removeMember(Object& parent, const Member& member); |
587 |
schoenebeck |
3138 |
void remove(const Object& obj); |
588 |
|
|
Object& rootObject(); |
589 |
|
|
Object& objectByUID(const UID& uid); |
590 |
schoenebeck |
3150 |
void setAutoValue(Object& object, String value); |
591 |
|
|
void setIntValue(Object& object, int64_t value); |
592 |
|
|
void setRealValue(Object& object, double value); |
593 |
|
|
void setBoolValue(Object& object, bool value); |
594 |
|
|
void setEnumValue(Object& object, uint64_t value); |
595 |
|
|
String valueAsString(const Object& object); |
596 |
schoenebeck |
3156 |
String name() const; |
597 |
|
|
void setName(String name); |
598 |
|
|
String comment() const; |
599 |
|
|
void setComment(String comment); |
600 |
|
|
time_t timeStampCreated() const; |
601 |
|
|
time_t timeStampModified() const; |
602 |
|
|
tm dateTimeCreated(time_base_t base = LOCAL_TIME) const; |
603 |
|
|
tm dateTimeModified(time_base_t base = LOCAL_TIME) const; |
604 |
schoenebeck |
3138 |
|
605 |
|
|
protected: |
606 |
|
|
// UID resolver for non-pointer types |
607 |
|
|
template<typename T> |
608 |
|
|
class UIDChainResolver { |
609 |
|
|
public: |
610 |
|
|
UIDChainResolver(const T& data) { |
611 |
|
|
m_uid.push_back(UID::from(data)); |
612 |
|
|
} |
613 |
|
|
|
614 |
|
|
operator UIDChain() const { return m_uid; } |
615 |
|
|
UIDChain operator()() const { return m_uid; } |
616 |
|
|
private: |
617 |
|
|
UIDChain m_uid; |
618 |
|
|
}; |
619 |
|
|
|
620 |
|
|
// UID resolver for pointer types (of 1st degree) |
621 |
|
|
template<typename T> |
622 |
|
|
class UIDChainResolver<T*> { |
623 |
|
|
public: |
624 |
|
|
UIDChainResolver(const T*& data) { |
625 |
|
|
m_uid.push_back((UID) { &data, sizeof(data) }); |
626 |
|
|
m_uid.push_back((UID) { data, sizeof(*data) }); |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
operator UIDChain() const { return m_uid; } |
630 |
|
|
UIDChain operator()() const { return m_uid; } |
631 |
|
|
private: |
632 |
|
|
UIDChain m_uid; |
633 |
|
|
}; |
634 |
|
|
|
635 |
|
|
// SerializationRecursion for non-pointer class/struct types. |
636 |
|
|
template<typename T, bool T_isRecursive> |
637 |
|
|
struct SerializationRecursionImpl { |
638 |
|
|
static void serializeObject(Archive* archive, const T& obj) { |
639 |
|
|
const_cast<T&>(obj).serialize(archive); |
640 |
|
|
} |
641 |
|
|
}; |
642 |
|
|
|
643 |
|
|
// SerializationRecursion for pointers (of 1st degree) to class/structs. |
644 |
|
|
template<typename T, bool T_isRecursive> |
645 |
|
|
struct SerializationRecursionImpl<T*,T_isRecursive> { |
646 |
|
|
static void serializeObject(Archive* archive, const T*& obj) { |
647 |
|
|
if (!obj) return; |
648 |
|
|
const_cast<T*&>(obj)->serialize(archive); |
649 |
|
|
} |
650 |
|
|
}; |
651 |
|
|
|
652 |
|
|
// NOOP SerializationRecursion for primitive types. |
653 |
|
|
template<typename T> |
654 |
|
|
struct SerializationRecursionImpl<T,false> { |
655 |
|
|
static void serializeObject(Archive* archive, const T& obj) {} |
656 |
|
|
}; |
657 |
|
|
|
658 |
|
|
// NOOP SerializationRecursion for pointers (of 1st degree) to primitive types. |
659 |
|
|
template<typename T> |
660 |
|
|
struct SerializationRecursionImpl<T*,false> { |
661 |
|
|
static void serializeObject(Archive* archive, const T*& obj) {} |
662 |
|
|
}; |
663 |
|
|
|
664 |
|
|
// Automatically handles recursion for class/struct types, while ignoring all primitive types. |
665 |
|
|
template<typename T> |
666 |
|
|
struct SerializationRecursion : SerializationRecursionImpl<T, __is_class(T)> { |
667 |
|
|
}; |
668 |
|
|
|
669 |
|
|
class ObjectPool : public std::map<UID,Object> { |
670 |
|
|
public: |
671 |
|
|
// prevent passing obvious invalid UID values from creating a new pair entry |
672 |
|
|
Object& operator[](const UID& k) { |
673 |
|
|
static Object invalid; |
674 |
|
|
if (!k.isValid()) { |
675 |
|
|
invalid = Object(); |
676 |
|
|
return invalid; |
677 |
|
|
} |
678 |
|
|
return std::map<UID,Object>::operator[](k); |
679 |
|
|
} |
680 |
|
|
}; |
681 |
|
|
|
682 |
|
|
friend String _encode(const ObjectPool& objects); |
683 |
|
|
|
684 |
|
|
private: |
685 |
|
|
String _encodeRootBlob(); |
686 |
|
|
void _popRootBlob(const char*& p, const char* end); |
687 |
|
|
void _popObjectsBlob(const char*& p, const char* end); |
688 |
|
|
|
689 |
|
|
protected: |
690 |
|
|
class Syncer { |
691 |
|
|
public: |
692 |
|
|
Syncer(Archive& dst, Archive& src); |
693 |
|
|
protected: |
694 |
|
|
void syncObject(const Object& dst, const Object& src); |
695 |
|
|
void syncPrimitive(const Object& dst, const Object& src); |
696 |
|
|
void syncPointer(const Object& dst, const Object& src); |
697 |
|
|
void syncMember(const Member& dstMember, const Member& srcMember); |
698 |
|
|
static Member dstMemberMatching(const Object& dstObj, const Object& srcObj, const Member& srcMember); |
699 |
|
|
private: |
700 |
|
|
Archive& m_dst; |
701 |
|
|
Archive& m_src; |
702 |
|
|
}; |
703 |
|
|
|
704 |
|
|
virtual void encode(); |
705 |
|
|
|
706 |
|
|
ObjectPool m_allObjects; |
707 |
|
|
operation_t m_operation; |
708 |
|
|
UID m_root; |
709 |
|
|
RawData m_rawData; |
710 |
schoenebeck |
3150 |
bool m_isModified; |
711 |
schoenebeck |
3156 |
String m_name; |
712 |
|
|
String m_comment; |
713 |
|
|
time_t m_timeCreated; |
714 |
|
|
time_t m_timeModified; |
715 |
schoenebeck |
3138 |
}; |
716 |
|
|
|
717 |
|
|
/** |
718 |
|
|
* Will be thrown whenever an error occurs during an serialization or |
719 |
|
|
* deserialization process. |
720 |
|
|
*/ |
721 |
|
|
class Exception { |
722 |
|
|
public: |
723 |
|
|
String Message; |
724 |
|
|
|
725 |
|
|
Exception(String Message) { Exception::Message = Message; } |
726 |
|
|
void PrintMessage(); |
727 |
|
|
virtual ~Exception() {} |
728 |
|
|
}; |
729 |
|
|
|
730 |
|
|
} // namespace Serialization |
731 |
|
|
|
732 |
|
|
#endif // LIBGIG_SERIALIZATION_H |