Option data translation between YANG and JSON. More...

#include <translator_option_data.h>

Inheritance diagram for isc::yang::TranslatorOptionData:

Public Member Functions
	TranslatorOptionData (sysrepo::Session session, const std::string &model)
	Constructor.

virtual	~TranslatorOptionData ()=default
	Destructor.

isc::data::ElementPtr	getOptionData (libyang::DataNode const &data_node)
	Translate an option data from YANG to JSON.

isc::data::ElementPtr	getOptionDataFromAbsoluteXpath (std::string const &xpath)
	Translate an option data from YANG to JSON.

void	setOptionData (const std::string &xpath, isc::data::ConstElementPtr elem)
	Translate and set option data from JSON to YANG.

Public Member Functions inherited from isc::yang::Translator
	Translator (sysrepo::Session session, const std::string &model)
	Constructor.

virtual	~Translator ()=default
	Destructor.

template<typename T >
void	checkAndGet (isc::data::ElementPtr const &storage, libyang::DataNode const &data_node, std::string const &xpath, T translate) const
	Calls {translate} for the element found at {xpath} relative to {data_node} and sets the result in {storage} with the {xpath} key.

void	checkAndGetAndJsonifyLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, const std::string &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node, converts it from string to JSON and stores it in the specified storage.

template<typename T >
void	checkAndGetDiverging (isc::data::ElementPtr const &storage, libyang::DataNode const &data_node, std::string const &key, std::string const &xpath, T translate) const
	Calls {translate} for the element found at {xpath} relative to {data_node} and sets the result in {storage} with the {key} key.

void	checkAndGetDivergingLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name, std::string const &yang_name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

void	checkAndGetLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

void	checkAndSetDivergingLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, std::string const &yang_name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndSetLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndSetLeafList (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath as a leaf-list.

void	checkAndSetUserContext (isc::data::ConstElementPtr const &from, std::string const &xpath)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	checkAndStringifyAndSetLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	deleteItem (const std::string &xpath)
	Delete basic value from YANG.

libyang::DataNode	findXPath (std::string const &xpath) const
	Retrieves a YANG data node by xpath.

template<typename functor_t >
void	forAll (std::string const &xpath, functor_t f) const
	Run a function for a node and all its children.

std::optional< libyang::DataNode >	getData (std::string const &xpath) const
	Get a YANG data node found at the given absolute xpath.

isc::data::ElementPtr	getItem (libyang::DataNode const &data_node, std::string const &xpath) const
	Translate a basic value from YANG to JSON for a given xpath that is relative to the given source node.

isc::data::ElementPtr	getItemFromAbsoluteXpath (std::string const &xpath) const
	Translate a basic value from YANG to JSON for a given absolute xpath.

template<typename T >
isc::data::ElementPtr	getList (libyang::DataNode const &data_node, std::string const &xpath, T &t, isc::data::ElementPtr(T::*f)(libyang::DataNode const &)) const
	Retrieve a list as ElementPtr from sysrepo from a certain xpath.

void	getMandatoryDivergingLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name, std::string const &yang_name) const
	Retrieves a child YANG data node identified by one name from the given parent YANG container node and stores it in the specified storage under a different name.

void	getMandatoryLeaf (isc::data::ElementPtr &storage, libyang::DataNode const &data_node, std::string const &name) const
	Retrieves a child YANG data node identified by name from the given parent YANG container node and stores it in the specified storage.

bool	schemaNodeExists (std::string const &xpath) const
	Checks whether a YANG node exists in the schema.

void	setItem (const std::string &xpath, isc::data::ConstElementPtr const elem, libyang::LeafBaseType const type)
	Translate and set basic value from JSON to YANG.

void	setMandatoryDivergingLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, std::string const &yang_name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

void	setMandatoryLeaf (isc::data::ConstElementPtr const &from, std::string const &xpath, std::string const &name, libyang::LeafBaseType const type)
	Get an element from given ElementPtr node and set it in sysrepo at given xpath.

Protected Member Functions
isc::data::ElementPtr	getOptionDataKea (libyang::DataNode const &data_node)
	getOptionData JSON for kea-dhcp[46].

void	setOptionDataKea (const std::string &xpath, isc::data::ConstElementPtr elem)
	setOptionData for kea-dhcp[46].

Additional Inherited Members
Static Public Member Functions inherited from isc::yang::Translator
static isc::data::ElementPtr	translateFromYang (std::optional< libyang::DataNode > data_node)
	Translate basic value from the given YANG data node to JSON element.

static std::optional< std::string >	translateToYang (isc::data::ConstElementPtr const &elem, libyang::LeafBaseType const type)
	Translate basic value from JSON to YANG.

Protected Types inherited from isc::yang::Translator
using	Deserializer = std::unordered_map< libyang::LeafBaseType, std::function< isc::data::ElementPtr const (std::string const &)> >
	Maps YANG types to functions that transform a YANG type into an ElementPtr.

using	Serializer = std::unordered_map< libyang::LeafBaseType, std::function< std::string const (std::string const &)> >
	Maps YANG types to functions that transform the string representation of an Element into a string that can be passed into Session::setItem().

Static Protected Member Functions inherited from isc::yang::Translator
static std::string	decode64 (std::string const &input)
	Decode a YANG element of binary type to a string that can be stored in an Element::string JSON.

static std::string	encode64 (std::string const &input)
	Encode a string such that it can be stored in a YANG element of binary type.

static Deserializer	initializeDeserializer ()
	Initializes the deserializer which is used to translate a YANG node to an ElementPtr.

static Serializer	initializeSerializer ()
	Initializes the serializer which is used to translate the string value of an Element to a string that can be passed into Session::setItem().

Protected Attributes inherited from isc::yang::Translator
std::string	model_
	The model.

sysrepo::Session	session_
	The sysrepo session.

Detailed Description

Option data translation between YANG and JSON.

JSON syntax for Kea DHCP with command channel is:

{
    "code": <code>,
    "name": <name>,
    "space": <space>,
    "csv-format": <csv format flag>,
    "data": <value>,
    "always-send": <always send flag>,
    "never-send": <never send flag>,
    "user-context": { <json map> },
    "comment": "<comment>"
}

YANG syntax for kea-dhcp[46] with code and space as keys is:

+--rw option-data* [code space]
   +--rw code            uint8
   +--rw space           string
   +--rw name?           string
   +--rw data?           string
   +--rw csv-format?     boolean
   +--rw always-send?    boolean
   +--rw never-send?     boolean
   +--rw user-context?   user-context

An example in JSON and YANG formats:

[
    {
        "code": 100,
        "space": "dns",
        "csv-format": false,
        "data": "12121212",
        "always-send": false,
        "never-send": false
    }
]

/kea-dhcp6-server:config (container)
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212'] (list instance)
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212']/code = 100
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212']/space = dns
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212']/csv-format = false
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212']/always-send = false
/kea-dhcp6-server:config/
   option-data[code='100'][space='dns'][data='12121212']/never-send = false