Provides an interface to specify a path to a key in a document that you can then call various update functions on. More...

#include <AbstractDocumentPath.hpp>

Inheritance diagram for ditto::AbstractDocumentPath:

Public Member Functions
nlohmann::json	get_json (PathAccessorType path_type) const

AbstractDocumentPath	operator[] (std::string path)
	Used to specify a path to a key in the document that you can subscript further to access a nested key in the document and eventually perform an update operation on.

AbstractDocumentPath	operator[] (std::size_t index)
	Used to specify an index in the array at the preceding key-path specified through the subscripting defined previously. You can subscript the return value further to access a further nested key in the document and eventually perform an update operation.

std::string	get_string_value () const
	Returns the value at the previously specified key in the document as a `std::string`. If the key was invalid a default value of an empty string will be returned.

int	get_int_value () const
	Returns the value at the previously specified key in the document as an `int`. If the key was invalid a default value of 0 will be returned.

double	get_double_value () const
	Returns the value at the previously specified key in the document as a `double`. If the key was invalid a default value of 0 will be returned.

float	get_float_value () const
	Returns the value at the previously specified key in the document as a `float`. If the key was invalid a default value of 0 will be returned.

bool	get_bool_value () const
	Returns the value at the previously specified key in the document as a `bool`. If the key was invalid a default value of false will be returned.

nlohmann::json	get_json () const
	Returns the value at the previously specified key in the document as a `nlohmann::json` object. If the key was invalid the return value will be a `nullptr`.

Protected Member Functions
	AbstractDocumentPath (CDocument_t const *document, DocumentId id, std::string initial_path)
	Constructs a new initial `AbstractDocumentPath` for a document.

	AbstractDocumentPath (const AbstractDocumentPath *document_path, std::string key)
	Constructs a new `AbstractDocumentPath` from an existing `AbstractDocumentPath` by appending a path.

	AbstractDocumentPath (const AbstractDocumentPath *document_path, std::size_t index)
	Constructs a new `AbstractDocumentPath` from an existing `AbstractDocumentPath` by appending an index.

	AbstractDocumentPath (const AbstractDocumentPath *document_path)
	Copy constructor.

template<typename T >
T	get_primitive_or_default (T default_value, json_callback json_cb, PathAccessorType path_type) const
	Get the primitive stored at a given path or the correspondign default value.

template<typename T >
std::shared_ptr< T >	get_object_or_default (json_callback json_cb, PathAccessorType path_type) const
	Helper function to retrieve crdt objects.

template<typename T >
std::shared_ptr< T >	get_mut_object_or_default (json_callback json_cb, PathAccessorType path_type) const

Protected Attributes
CDocument_t const *	document

DocumentId	id

std::string	path

Detailed Description

Provides an interface to specify a path to a key in a document that you can then call various update functions on.

Constructor & Destructor Documentation

◆ AbstractDocumentPath() [1/4]

ditto::AbstractDocumentPath::AbstractDocumentPath	(	CDocument_t const *	document,
		DocumentId	id,
		std::string	initial_path
	)

protected

Constructs a new initial AbstractDocumentPath for a document.

Parameters

[in]	document	A pointer to the Rust `CDocument_t`.
[in]	id	The ID of the `Document` to which this path corresponds.
[in]	initial_path	The key for the initial path into the document. This must always be a string key (i.e. a map key) rather than an array index as every top level `Document` is a map. The `initial_path` will be sanitized within the constructor.

◆ AbstractDocumentPath() [2/4]

ditto::AbstractDocumentPath::AbstractDocumentPath	(	const AbstractDocumentPath *	document_path,
		std::string	key
	)

protected

Constructs a new AbstractDocumentPath from an existing AbstractDocumentPath by appending a path.

Parameters

[in]	documentPath	The existing document path.
[in]	key	The path component to append. It will be sanitized internally

◆ AbstractDocumentPath() [3/4]

ditto::AbstractDocumentPath::AbstractDocumentPath	(	const AbstractDocumentPath *	document_path,
		std::size_t	index
	)

protected

Constructs a new AbstractDocumentPath from an existing AbstractDocumentPath by appending an index.

Parameters

[in]	documentPath	The existing document path.
[in]	key	The path component to append.

◆ AbstractDocumentPath() [4/4]

ditto::AbstractDocumentPath::AbstractDocumentPath ( const AbstractDocumentPath * document_path )

protected

Copy constructor.

Parameters

document_path

Member Function Documentation

◆ get_bool_value()

bool ditto::AbstractDocumentPath::get_bool_value ( ) const

Returns the value at the previously specified key in the document as a bool. If the key was invalid a default value of false will be returned.

Returns: The value at the path specified by the document subscripting as a bool. The return value will be false if the key was invalid or the value was not a boolean type.

◆ get_double_value()

double ditto::AbstractDocumentPath::get_double_value ( ) const

Returns the value at the previously specified key in the document as a double. If the key was invalid a default value of 0 will be returned.

Returns: The value at the path specified by the document subscripting as a double. The return value will be 0 if the key was invalid or the value was not a numeric type.

◆ get_float_value()

float ditto::AbstractDocumentPath::get_float_value ( ) const

Returns the value at the previously specified key in the document as a float. If the key was invalid a default value of 0 will be returned.

Returns: The value at the path specified by the document subscripting as a float. The return value will be 0 if the key was invalid or the value was not a numeric type.

◆ get_int_value()

int ditto::AbstractDocumentPath::get_int_value ( ) const

Returns the value at the previously specified key in the document as an int. If the key was invalid a default value of 0 will be returned.

Returns: The value at the path specified by the document subscripting as an int. The return value will be 0 if the key was invalid or the value was not a numeric type.

◆ get_json()

json ditto::AbstractDocumentPath::get_json ( ) const

Returns the value at the previously specified key in the document as a nlohmann::json object. If the key was invalid the return value will be a nullptr.

Returns: The value at the path specified by the document subscripting as a nlohmann::json object. The return value will be a nullptr if the key was invalid.

◆ get_object_or_default()

template<typename T >

template std::shared_ptr< Rga > ditto::AbstractDocumentPath::get_object_or_default< Rga >	(	json_callback	json_cb,
		PathAccessorType	path_type
	)		const

protected

Helper function to retrieve crdt objects.

This is done here because safer_ffi_utils in not included within Ditto.h.

Template Parameters

T

Parameters

json_cb	callback to check if the retrieved json value has the right typing. If no callback is provided - nullptr - this check is simply skipped.
path_type	expected type at path

Returns: std::shared_ptr<T>

◆ get_primitive_or_default()

template<typename T >

T ditto::AbstractDocumentPath::get_primitive_or_default	(	T	default_value,
		json_callback	json_cb,
		PathAccessorType	path_type
	)		const

protected

Get the primitive stored at a given path or the correspondign default value.

Template Parameters

T	type wanted

Parameters

default_value default value T if it cannot be retrieved from the document.

◆ get_string_value()

std::string ditto::AbstractDocumentPath::get_string_value ( ) const

Returns the value at the previously specified key in the document as a std::string. If the key was invalid a default value of an empty string will be returned.

Returns: The value at the path specified by the document subscripting as a std::string. The return value will be an empty string if the key was invalid or the value was not a string.

◆ operator[]() [1/2]

AbstractDocumentPath ditto::AbstractDocumentPath::operator[] ( std::size_t index )

Used to specify an index in the array at the preceding key-path specified through the subscripting defined previously. You can subscript the return value further to access a further nested key in the document and eventually perform an update operation.

Parameters

[in] index the index of the array that you wish to access in the key previously specified with the preceding subscripting.

Returns: a AbstractDocumentPath with the provided index incorporated into the path.

◆ operator[]() [2/2]

AbstractDocumentPath ditto::AbstractDocumentPath::operator[] ( std::string path )

Used to specify a path to a key in the document that you can subscript further to access a nested key in the document and eventually perform an update operation on.

Parameters

[in] path the next part of the path needed to get to the key in the document you wish to update.

Returns: a AbstractDocumentPath with the provided key incorporated into the path.

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ AbstractDocumentPath() [1/4]

◆ AbstractDocumentPath() [2/4]

◆ AbstractDocumentPath() [3/4]

◆ AbstractDocumentPath() [4/4]

Member Function Documentation

◆ get_bool_value()

◆ get_double_value()

◆ get_float_value()

◆ get_int_value()

◆ get_json()

◆ get_object_or_default()

◆ get_primitive_or_default()

◆ get_string_value()

◆ operator[]() [1/2]

◆ operator[]() [2/2]