255 lines
6.2 KiB
C++
255 lines
6.2 KiB
C++
/*
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* Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2.0,
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* as published by the Free Software Foundation.
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*
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* This program is also distributed with certain software (including
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* but not limited to OpenSSL) that is licensed under separate terms,
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* as designated in a particular file or component or in included license
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* documentation. The authors of MySQL hereby grant you an additional
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* permission to link the program and your derivative works with the
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* separately licensed software that they have included with MySQL.
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*
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* This program 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, version 2.0, 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 program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PLUGIN_X_CLIENT_MYSQLXCLIENT_XARGUMENT_H_
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#define PLUGIN_X_CLIENT_MYSQLXCLIENT_XARGUMENT_H_
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#include <cstdint>
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#include <map>
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#include <stdexcept>
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#include <string>
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#include <utility>
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#include <vector>
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namespace xcl {
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class Argument_value {
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public:
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using Arguments = std::vector<Argument_value>;
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using Object = std::map<std::string, Argument_value>;
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using Unordered_object = std::vector<std::pair<std::string, Argument_value>>;
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enum class String_type { k_string, k_octets, k_decimal };
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enum class Type {
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k_integer,
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k_uinteger,
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k_null,
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k_double,
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k_float,
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k_bool,
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k_string,
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k_octets,
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k_decimal,
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k_array,
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k_object
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};
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class Visitor {
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public:
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virtual ~Visitor() = default;
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virtual void visit_null() = 0;
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virtual void visit_integer(const int64_t value) = 0;
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virtual void visit_uinteger(const uint64_t value) = 0;
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virtual void visit_double(const double value) = 0;
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virtual void visit_float(const float value) = 0;
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virtual void visit_bool(const bool value) = 0;
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virtual void visit_object(const Object &value) = 0;
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virtual void visit_uobject(const Unordered_object &value) = 0;
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virtual void visit_array(const Arguments &value) = 0;
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virtual void visit_string(const std::string &value) = 0;
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virtual void visit_octets(const std::string &value) = 0;
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virtual void visit_decimal(const std::string &value) = 0;
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};
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public:
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Argument_value() { set(); }
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explicit Argument_value(const std::string &s, const String_type string_type =
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String_type::k_string) {
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set(s, get_type(string_type));
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}
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template <typename Value_type>
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explicit Argument_value(const Value_type n) {
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set(n);
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}
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template <typename Value_type>
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Argument_value &operator=(const Value_type &value) {
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m_string.clear();
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m_object.clear();
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m_unordered_object.clear();
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m_array.clear();
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set(value);
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return *this;
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}
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Type type() const { return m_type; }
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void accept(Visitor *visitor) const {
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switch (m_type) {
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case Type::k_integer:
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visitor->visit_integer(m_value.i);
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return;
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case Type::k_uinteger:
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visitor->visit_uinteger(m_value.ui);
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return;
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case Type::k_null:
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visitor->visit_null();
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return;
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case Type::k_double:
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visitor->visit_double(m_value.d);
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return;
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case Type::k_float:
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visitor->visit_float(m_value.f);
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return;
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case Type::k_bool:
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visitor->visit_bool(m_value.b);
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return;
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case Type::k_string:
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visitor->visit_string(m_string);
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return;
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case Type::k_octets:
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visitor->visit_octets(m_string);
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return;
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case Type::k_decimal:
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visitor->visit_decimal(m_string);
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return;
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case Type::k_array:
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visitor->visit_array(m_array);
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return;
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case Type::k_object:
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if (m_object.empty())
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visitor->visit_uobject(m_unordered_object);
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else
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visitor->visit_object(m_object);
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return;
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}
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}
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private:
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Type get_type(const String_type type) const {
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switch (type) {
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case String_type::k_string:
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return Type::k_string;
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case String_type::k_octets:
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return Type::k_octets;
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case String_type::k_decimal:
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return Type::k_decimal;
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}
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return Type::k_null;
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}
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void set() { m_type = Type::k_null; }
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void set(const std::string &s, Type type = Type::k_string) {
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m_type = type;
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m_string = s;
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}
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void set(const char *s, Type type = Type::k_string) {
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m_type = type;
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m_string = s;
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}
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void set(const bool n) {
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m_type = Type::k_bool;
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m_value.b = n;
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}
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void set(const float n) {
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m_type = Type::k_float;
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m_value.f = n;
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}
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void set(const double n) {
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m_type = Type::k_double;
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m_value.d = n;
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}
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void set(const int64_t n) {
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m_type = Type::k_integer;
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m_value.i = n;
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}
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void set(const uint64_t n) {
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m_type = Type::k_uinteger;
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m_value.ui = n;
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}
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void set(const Arguments &arguments) {
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m_type = Type::k_array;
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m_array = arguments;
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}
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template <typename Value_type>
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void set(const std::vector<Value_type> &arguments) {
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m_type = Type::k_array;
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m_array.clear();
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for (const auto &a : arguments) {
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m_array.push_back(Argument_value(a));
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}
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}
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void set(const Object &object) {
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m_type = Type::k_object;
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m_object = object;
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}
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void set(const Unordered_object &object) {
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m_type = Type::k_object;
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m_unordered_object = object;
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}
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Type m_type;
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std::string m_string;
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Arguments m_array;
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Object m_object;
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Unordered_object m_unordered_object;
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union {
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int64_t i;
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uint64_t ui;
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double d;
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float f;
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bool b;
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} m_value;
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};
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using Argument_array = Argument_value::Arguments;
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using Argument_object = Argument_value::Object;
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using Argument_uobject = Argument_value::Unordered_object;
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using Argument_visitor = Argument_value::Visitor;
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using Argument_type = Argument_value::Type;
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} // namespace xcl
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#endif // PLUGIN_X_CLIENT_MYSQLXCLIENT_XARGUMENT_H_
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