Struct opcua_server::prelude::ExtensionObject

pub struct ExtensionObject {
    pub node_id: NodeId,
    pub body: ExtensionObjectEncoding,
}

An extension object holds a serialized object identified by its node id.

Fields

node_id: NodeId

body: ExtensionObjectEncoding

Methods

impl ExtensionObject

pub fn null() -> ExtensionObject

Creates a null extension object, i.e. one with no value or payload

pub fn is_null(&self) -> bool

Tests for null node id.

pub fn is_empty(&self) -> bool

Tests for empty body.

pub fn from_encodable<N, T>(node_id: N, encodable: &T) -> ExtensionObject where
    N: 'static + Into<NodeId>,
    T: BinaryEncoder<T>, 

Creates an extension object with the specified node id and the encodable object as its payload. The body is set to a byte string containing the encoded struct.

pub fn decode_inner<T>(
    &self,
    decoding_limits: &DecodingLimits
) -> Result<T, StatusCode> where
    T: BinaryEncoder<T>, 

Decodes the inner content of the extension object and returns it. The node id is ignored for decoding. The caller supplies the binary encoder impl that should be used to extract the data. Errors result in a decoding error.

Trait Implementations

impl BinaryEncoder<ExtensionObject> for ExtensionObject

fn byte_len(&self) -> usize

Returns the byte length of the structure. This calculation should be exact and as efficient as possible.

fn encode<S>(&self, stream: &mut S) -> Result<usize, StatusCode> where
    S: Write, 

Encodes the instance to the write stream.

fn decode<S>(
    stream: &mut S,
    decoding_limits: &DecodingLimits
) -> Result<ExtensionObject, StatusCode> where
    S: Read, 

Decodes an instance from the read stream. The decoding limits are restrictions set by the server / client on the length of strings, arrays etc. If these limits are exceeded the implementation should return with a BadDecodingError as soon as possible.

fn to_vec(&self) -> Vec<u8>

impl Clone for ExtensionObject

fn clone(&self) -> ExtensionObject

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Serialize for ExtensionObject

fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl From<ExtensionObject> for Variant

fn from(v: ExtensionObject) -> Variant

Performs the conversion.

impl PartialEq<ExtensionObject> for ExtensionObject

fn eq(&self, other: &ExtensionObject) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ExtensionObject) -> bool

This method tests for !=.

impl<'de> Deserialize<'de> for ExtensionObject

fn deserialize<__D>(
    __deserializer: __D
) -> Result<ExtensionObject, <__D as Deserializer<'de>>::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Debug for ExtensionObject

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.