Struct PointMeta 

pub struct PointMeta {

    pub point_id: i32,
    pub channel_id: i32,
    pub channel_name: Arc<str>,
    pub device_id: i32,
    pub device_name: Arc<str>,
    pub point_name: Arc<str>,
    pub point_key: Arc<str>,
    pub data_type: DataType,
    pub access_mode: AccessMode,
    pub unit: Option<Arc<str>>,
    pub min_value: Option<f64>,
    pub max_value: Option<f64>,
    pub transform: Transform,
    pub description: Option<Arc<str>>,
}

Northward envelope protocol types (re-exported at crate root). Point metadata snapshot for northward consumption.

This struct is intended to be:

• Read-only for plugins
• Cheap to clone via Arc<PointMeta>
• Stable across core internal refactors

All strings are stored as Arc<str> to reduce cloning cost.

Fields

point_id: i32

Point identifier (primary key).

channel_id: i32

Channel identifier.

channel_name: Arc<str>

Channel name.

device_id: i32

Device identifier.

device_name: Arc<str>

Device name.

point_name: Arc<str>

Point display name.

point_key: Arc<str>

Point key used for protocol encoding and UI display.

data_type: DataType

Strong data type definition for this point.

access_mode: AccessMode

Access mode for read/write validation.

unit: Option<Arc<str>>

Unit of measurement (optional).

min_value: Option<f64>

Minimum allowed engineering value (optional).

max_value: Option<f64>

Maximum allowed engineering value (optional).

transform: Transform

Logical-layer transform rules for this point.

This is always present; identity semantics are defined by Transform.

description: Option<Arc<str>>

Human-readable description (optional).

Implementations

impl PointMeta

pub fn wire_data_type(&self) -> DataType

Get the wire data type (protocol-level, memory-layout semantics).

For PointMeta, this is the configured data_type persisted in the gateway.

pub fn logical_data_type(&self) -> DataType

Get the logical data type (northward-facing semantics).

This is derived from transform.transform_data_type and falls back to the wire data type when not configured.

pub fn readable(&self) -> bool

pub fn writable(&self) -> bool

Trait Implementations

impl Clone for PointMeta

fn clone(&self) -> PointMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PointMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PointMeta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PointMeta

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

where __S: Serializer,

Serialize this value into the given Serde serializer.