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/* * Copyright (c) 2015, 2023, Oracle and/or its affiliates. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2.0, * as published by the Free Software Foundation. * * This program is also distributed with certain software (including * but not limited to OpenSSL) that is licensed under separate terms, * as designated in a particular file or component or in included license * documentation. The authors of MySQL hereby grant you an additional * permission to link the program and your derivative works with the * separately licensed software that they have included with MySQL. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License, version 2.0, for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ #ifndef _XPL_EXPR_GENERATOR_H_ #define _XPL_EXPR_GENERATOR_H_ #include "query_string_builder.h" #include "ngs_common/protocol_protobuf.h" #include <stdexcept> namespace xpl { class Expression_generator { public: typedef ::Mysqlx::Expr::Expr Expr; typedef ::google::protobuf::RepeatedPtrField< ::Mysqlx::Datatypes::Scalar > Args; class Error : public std::invalid_argument { int m_error; public: Error(int error_code, const std::string& message); int error() const { return m_error; } }; // source: ``Mysqlx.Resultset.ColumnMetadata`` for list of known values enum Octets_content_type { CT_PLAIN = 0x0000, // default value; general use of octets CT_GEOMETRY = 0x0001, // BYTES 0x0001 GEOMETRY (WKB encoding) CT_JSON = 0x0002, // BYTES 0x0002 JSON (text encoding) CT_XML = 0x0003 // BYTES 0x0003 XML (text encoding) }; Expression_generator(Query_string_builder &qb, const Args &args, const std::string &default_schema, const bool &is_relational) : m_qb(qb), m_args(args), m_default_schema(default_schema), m_is_relational(is_relational) {} template<typename T> inline void feed(const T &expr) const { generate(expr); } Expression_generator clone(Query_string_builder &qb) const; Query_string_builder &query_string_builder() const { return m_qb; } private: typedef ::google::protobuf::RepeatedPtrField< ::Mysqlx::Expr::DocumentPathItem > Document_path; typedef ::google::protobuf::uint32 Placeholder; void generate(const Mysqlx::Expr::Expr &arg) const; void generate(const Mysqlx::Expr::Identifier &arg, const bool is_function=false) const; void generate(const Mysqlx::Expr::ColumnIdentifier &arg) const; void generate(const Mysqlx::Expr::FunctionCall &arg) const; void generate(const Mysqlx::Expr::Operator &arg) const; void generate(const Mysqlx::Datatypes::Any &arg) const; void generate(const Mysqlx::Datatypes::Scalar &arg) const; void generate(const Mysqlx::Datatypes::Scalar::Octets &arg) const; void generate(const Document_path &arg) const; void generate(const Placeholder &arg) const; void generate(const Mysqlx::Expr::Object &arg) const; void generate(const Mysqlx::Expr::Object::ObjectField &arg) const; void generate(const Mysqlx::Expr::Array &arg) const; template <typename T> void generate_for_each(const ::google::protobuf::RepeatedPtrField<T> &list, void (Expression_generator::*generate_fun)(const T&) const, const typename ::google::protobuf::RepeatedPtrField<T>::size_type offset = 0) const; void generate_unquote_param(const Mysqlx::Expr::Expr &arg) const; void binary_operator(const Mysqlx::Expr::Operator &arg, const char* str) const; void unary_operator(const Mysqlx::Expr::Operator &arg, const char* str) const; void nullary_operator(const Mysqlx::Expr::Operator &arg, const char* str) const; void in_expression(const Mysqlx::Expr::Operator &arg, const char* str) const; void like_expression(const Mysqlx::Expr::Operator &arg, const char* str) const; void between_expression(const Mysqlx::Expr::Operator &arg, const char* str) const; void date_expression(const Mysqlx::Expr::Operator &arg, const char* str) const; void cast_expression(const Mysqlx::Expr::Operator &arg) const; void binary_expression(const Mysqlx::Expr::Operator &arg, const char* str) const; void asterisk_operator(const Mysqlx::Expr::Operator &arg) const; Query_string_builder &m_qb; const Args &m_args; const std::string &m_default_schema; const bool &m_is_relational; }; template<typename T> void generate_expression(Query_string_builder &qb, const T &expr, const Expression_generator::Args &args, const std::string &default_schema, bool is_relational) { Expression_generator gen(qb, args, default_schema, is_relational); gen.feed(expr); } template<typename T> ngs::PFS_string generate_expression(const T &expr, const Expression_generator::Args &args, const std::string &default_schema, bool is_relational) { Query_string_builder qb; generate_expression(qb, expr, args, default_schema, is_relational); return qb.get(); } template<typename T> void generate_expression(Query_string_builder &qb, const T &expr, const std::string &default_schema, bool is_relational) { generate_expression(qb, expr, Expression_generator::Args(), default_schema, is_relational); } template<typename T> ngs::PFS_string generate_expression(const T &expr, const std::string &default_schema, bool is_relational) { return generate_expression(expr, Expression_generator::Args(), default_schema, is_relational); } } // namespace xpl #endif // _XPL_EXPR_GENERATOR_H_