Trait PropertyValueAccess

pub trait PropertyValueAccess {
    // Required methods
    fn as_u8(&self) -> Option<u8>;
    fn as_u16(&self) -> Option<u16>;
    fn as_u32(&self) -> Option<u32>;
    fn as_str(&self) -> Option<&str>;
    fn as_bytes(&self) -> Option<&[u8]>;
    fn as_key_value(&self) -> Option<(&str, &str)>;
}

Trait for accessing property values in a type-safe manner

This trait provides methods to extract values from Property enum variants without having to match on each variant explicitly. Methods return Option to handle cases where the property type doesn’t match the requested type.

Examples

use mqtt_protocol_core::mqtt;

let prop = mqtt::packet::Property::MessageExpiryInterval(
    mqtt::packet::MessageExpiryInterval::new(3600).unwrap()
);

// Extract the u32 value
if let Some(interval) = prop.as_u32() {
    println!("Message expires in {} seconds", interval);
}

Required Methods

fn as_u8(&self) -> Option<u8>

Extract u8 value from byte-based properties

Returns Some(u8) for properties that store single-byte values, None for other property types.

fn as_u16(&self) -> Option<u16>

Extract u16 value from two-byte properties

Returns Some(u16) for properties that store two-byte values, None for other property types.

fn as_u32(&self) -> Option<u32>

Extract u32 value from four-byte properties

Returns Some(u32) for properties that store four-byte values, None for other property types.

fn as_str(&self) -> Option<&str>

Extract string value from string-based properties

Returns Some(&str) for properties that store UTF-8 strings, None for other property types.

fn as_bytes(&self) -> Option<&[u8]>

Extract binary data from binary-based properties

Returns Some(&[u8]) for properties that store binary data, None for other property types.

fn as_key_value(&self) -> Option<(&str, &str)>

Extract key-value pair from UserProperty

Returns Some((key, value)) for UserProperty, None for other property types.

Implementors

impl PropertyValueAccess for Property