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