Syntax_check_handler Class Reference

This class implements a handler for use with rapidjson::Reader when we want to check if a string is a valid JSON text. More...

#include <json_syntax_check.h>

Inheritance diagram for Syntax_check_handler:

Public Member Functions
bool	StartObject ()
bool	EndObject (rapidjson::SizeType)
bool	StartArray ()
bool	EndArray (rapidjson::SizeType)
bool	too_deep_error_raised () const
	Syntax_check_handler (JsonErrorHandler m_depth_handler)

Private Attributes
size_t	m_depth {0}
	The current depth of the document. More...
bool	m_too_deep_error_raised {false}
JsonErrorHandler	m_depth_handler {nullptr}
	Pointer to a function that should handle error occurred when depth is exceeded. More...

Detailed Description

This class implements a handler for use with rapidjson::Reader when we want to check if a string is a valid JSON text.

The handler does not build a DOM structure, so it is quicker than Json_dom::parse() in the cases where we don't care about the DOM, such as in the JSON_VALID() function.

The handler keeps track of how deeply nested the document is, and it raises an error and stops parsing when the depth exceeds JSON_DOCUMENT_MAX_DEPTH.

All the member functions follow the rapidjson convention of returning true on success and false on failure.

Constructor & Destructor Documentation

Syntax_check_handler()

Syntax_check_handler::Syntax_check_handler ( JsonErrorHandler  m_depth_handler )

explicit

Member Function Documentation

EndArray()

bool Syntax_check_handler::EndArray

(

rapidjson::SizeType

)

EndObject()

bool Syntax_check_handler::EndObject

(

rapidjson::SizeType

)

StartArray()

bool Syntax_check_handler::StartArray

(

)

StartObject()

bool Syntax_check_handler::StartObject

(

)

too_deep_error_raised()

bool Syntax_check_handler::too_deep_error_raised ( ) const

inline

Member Data Documentation

m_depth

size_t Syntax_check_handler::m_depth {0}

private

The current depth of the document.

m_depth_handler

JsonErrorHandler Syntax_check_handler::m_depth_handler {nullptr}

private

Pointer to a function that should handle error occurred when depth is exceeded.

m_too_deep_error_raised

bool Syntax_check_handler::m_too_deep_error_raised {false}

private

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The documentation for this class was generated from the following files:

• sql-common/json_syntax_check.h
• sql-common/json_syntax_check.cc