| // Serialize example |
| // This example shows writing JSON string with writer directly. |
| |
| #include "rapidjson/prettywriter.h" // for stringify JSON |
| #include <cstdio> |
| #include <string> |
| #include <vector> |
| |
| using namespace rapidjson; |
| |
| class Person { |
| public: |
| Person(const std::string& name, unsigned age) : name_(name), age_(age) {} |
| Person(const Person& rhs) : name_(rhs.name_), age_(rhs.age_) {} |
| virtual ~Person(); |
| |
| Person& operator=(const Person& rhs) { |
| name_ = rhs.name_; |
| age_ = rhs.age_; |
| return *this; |
| } |
| |
| protected: |
| template <typename Writer> |
| void Serialize(Writer& writer) const { |
| // This base class just write out name-value pairs, without wrapping within an object. |
| writer.String("name"); |
| #if RAPIDJSON_HAS_STDSTRING |
| writer.String(name_); |
| #else |
| writer.String(name_.c_str(), static_cast<SizeType>(name_.length())); // Supplying length of string is faster. |
| #endif |
| writer.String("age"); |
| writer.Uint(age_); |
| } |
| |
| private: |
| std::string name_; |
| unsigned age_; |
| }; |
| |
| Person::~Person() { |
| } |
| |
| class Education { |
| public: |
| Education(const std::string& school, double GPA) : school_(school), GPA_(GPA) {} |
| Education(const Education& rhs) : school_(rhs.school_), GPA_(rhs.GPA_) {} |
| |
| template <typename Writer> |
| void Serialize(Writer& writer) const { |
| writer.StartObject(); |
| |
| writer.String("school"); |
| #if RAPIDJSON_HAS_STDSTRING |
| writer.String(school_); |
| #else |
| writer.String(school_.c_str(), static_cast<SizeType>(school_.length())); |
| #endif |
| |
| writer.String("GPA"); |
| writer.Double(GPA_); |
| |
| writer.EndObject(); |
| } |
| |
| private: |
| std::string school_; |
| double GPA_; |
| }; |
| |
| class Dependent : public Person { |
| public: |
| Dependent(const std::string& name, unsigned age, Education* education = 0) : Person(name, age), education_(education) {} |
| Dependent(const Dependent& rhs) : Person(rhs), education_(0) { education_ = (rhs.education_ == 0) ? 0 : new Education(*rhs.education_); } |
| virtual ~Dependent(); |
| |
| Dependent& operator=(const Dependent& rhs) { |
| if (this == &rhs) |
| return *this; |
| delete education_; |
| education_ = (rhs.education_ == 0) ? 0 : new Education(*rhs.education_); |
| return *this; |
| } |
| |
| template <typename Writer> |
| void Serialize(Writer& writer) const { |
| writer.StartObject(); |
| |
| Person::Serialize(writer); |
| |
| writer.String("education"); |
| if (education_) |
| education_->Serialize(writer); |
| else |
| writer.Null(); |
| |
| writer.EndObject(); |
| } |
| |
| private: |
| |
| Education *education_; |
| }; |
| |
| Dependent::~Dependent() { |
| delete education_; |
| } |
| |
| class Employee : public Person { |
| public: |
| Employee(const std::string& name, unsigned age, bool married) : Person(name, age), dependents_(), married_(married) {} |
| Employee(const Employee& rhs) : Person(rhs), dependents_(rhs.dependents_), married_(rhs.married_) {} |
| virtual ~Employee(); |
| |
| Employee& operator=(const Employee& rhs) { |
| static_cast<Person&>(*this) = rhs; |
| dependents_ = rhs.dependents_; |
| married_ = rhs.married_; |
| return *this; |
| } |
| |
| void AddDependent(const Dependent& dependent) { |
| dependents_.push_back(dependent); |
| } |
| |
| template <typename Writer> |
| void Serialize(Writer& writer) const { |
| writer.StartObject(); |
| |
| Person::Serialize(writer); |
| |
| writer.String("married"); |
| writer.Bool(married_); |
| |
| writer.String(("dependents")); |
| writer.StartArray(); |
| for (std::vector<Dependent>::const_iterator dependentItr = dependents_.begin(); dependentItr != dependents_.end(); ++dependentItr) |
| dependentItr->Serialize(writer); |
| writer.EndArray(); |
| |
| writer.EndObject(); |
| } |
| |
| private: |
| std::vector<Dependent> dependents_; |
| bool married_; |
| }; |
| |
| Employee::~Employee() { |
| } |
| |
| int main(int, char*[]) { |
| std::vector<Employee> employees; |
| |
| employees.push_back(Employee("Milo YIP", 34, true)); |
| employees.back().AddDependent(Dependent("Lua YIP", 3, new Education("Happy Kindergarten", 3.5))); |
| employees.back().AddDependent(Dependent("Mio YIP", 1)); |
| |
| employees.push_back(Employee("Percy TSE", 30, false)); |
| |
| StringBuffer sb; |
| PrettyWriter<StringBuffer> writer(sb); |
| |
| writer.StartArray(); |
| for (std::vector<Employee>::const_iterator employeeItr = employees.begin(); employeeItr != employees.end(); ++employeeItr) |
| employeeItr->Serialize(writer); |
| writer.EndArray(); |
| |
| puts(sb.GetString()); |
| |
| return 0; |
| } |