19.1.5.2. TypeSupport

class TypeSupport : public std::shared_ptr<TopicDataType>

Class TypeSupport used to provide the DomainRTPSParticipant with the methods to serialize, deserialize and get the key of a specific data type. The user should created a class that inherits from this one, where Serialize and deserialize methods MUST be implemented.

Note

This class inherits from std::shared_ptr<TopicDataType>.

Public Functions

TypeSupport() noexcept = default

Constructor.

TypeSupport(const TypeSupport &type) noexcept = default

Copy Constructor.

Parameters:

type – Another instance of TypeSupport

TypeSupport(TypeSupport &&type) noexcept = default

Move Constructor.

Parameters:

type – Another instance of TypeSupport

TypeSupport &operator=(const TypeSupport &type) noexcept = default

Copy Assignment.

Parameters:

type – Another instance of TypeSupport

TypeSupport &operator=(TypeSupport &&type) noexcept = default

Move Assignment.

Parameters:

type – Another instance of TypeSupport

inline explicit TypeSupport(TopicDataType *ptr)

TypeSupport constructor that receives a TopicDataType pointer.

The passed pointer will be managed by the TypeSupport object, so creating two TypeSupport from the same pointer or deleting the passed pointer will produce a runtime error.

Parameters:

ptr –

virtual ReturnCode_t register_type(DomainParticipant *participant) const

Registers the type on a participant.

Parameters:

participant – DomainParticipant where the type is going to be registered

Returns:

RETCODE_BAD_PARAMETER if the type name is empty, RETCODE_PRECONDITION_NOT_MET if there is another type with the same name registered on the DomainParticipant and RETCODE_OK if it is registered correctly

virtual ReturnCode_t register_type(DomainParticipant *participant, std::string type_name) const

Registers the type on a participant.

Parameters:

  • participant – DomainParticipant where the type is going to be registered

  • type_name – Name of the type to register

Returns:

RETCODE_BAD_PARAMETER if the type name is empty, RETCODE_PRECONDITION_NOT_MET if there is another type with the same name registered on the DomainParticipant and RETCODE_OK if it is registered correctly

inline virtual const std::string &get_type_name() const

Getter for the type name.

Returns:

name of the data type

virtual bool serialize(const void *const data, fastdds::rtps::SerializedPayload_t &payload, DataRepresentationId_t data_representation)

Serializes the data.

Parameters:

  • data – Pointer to data

  • payload – Pointer to payload

  • data_representation – [in] Representation that should be used to encode the data into the payload.

Returns:

true if it is serialized correctly, false if not

virtual bool deserialize(fastdds::rtps::SerializedPayload_t &payload, void *data)

Deserializes the data.

Parameters:

  • payload – Pointer to payload

  • data – Pointer to data

Returns:

true if it is deserialized correctly, false if not

inline virtual uint32_t calculate_serialized_size(const void *const data, DataRepresentationId_t data_representation)

Returns a function which can be used to calculate the serialized size of the provided data.

Parameters:

  • data – [in] Pointer to data.

  • data_representation – [in] Representation that should be used for calculating the serialized size.

Returns:

Functor which calculates the serialized size of the data.

inline virtual void *create_data()

Creates new data.

Returns:

Pointer to the data

inline virtual void delete_data(void *data)

Deletes data.

Parameters:

data – Pointer to the data to delete

inline virtual bool compute_key(const void *const data, InstanceHandle_t &i_handle, bool force_md5 = false)

Getter for the data key.

Parameters:

  • data – Pointer to serialized payload containing the data.

  • i_handle – InstanceHandle pointer to store the key

  • force_md5 – boolean to force md5 (default: false)

Returns:

true if the key is returned, false if not

inline virtual bool compute_key(fastdds::rtps::SerializedPayload_t &payload, InstanceHandle_t &i_handle, bool force_md5 = false)

Getter for the data key.

Parameters:

  • payload – Pointer to data

  • i_handle – InstanceHandle pointer to store the key

  • force_md5 – boolean to force md5 (default: false)

Returns:

true if the key is returned, false if not

inline bool empty() const

Check if the TypeSupport is empty.

Returns:

true if empty, false if not

inline virtual bool is_bounded() const

Checks if the type is bounded.

inline virtual bool is_plain(DataRepresentationId_t data_representation) const

Checks if the type is plain when using a specific encoding.