Trait PathAccessor 

pub trait PathAccessor<F: EvalContextFamily>:
    Debug
    + Send
    + Sync {
    // Required methods
    fn get<'a>(&self, ctx: &F::Context<'a>, fields: &[Field]) -> Result<Value>;
    fn set<'a>(
        &self,
        ctx: &mut F::Context<'a>,
        fields: &[Field],
        value: &Value,
    ) -> Result<()>;
}

Trait for accessing (reading and writing) path values in the context.

The evaluator calls get and set with a slice of Fields representing the structured path. Each field carries its own name and index keys; path interpretation is the integrator’s responsibility.

The fields slice is pre-allocated at parse time and passed by reference at execution time, so the hot path involves zero allocation and zero copy.

The type parameter F is the EvalContextFamily that determines the concrete context type. The lifetime on F::Context<'a> is introduced per method call, so PathAccessor<F> itself carries no lifetime and can be stored in Arc<dyn PathAccessor<F>>.

Required Methods

fn get<'a>(&self, ctx: &F::Context<'a>, fields: &[Field]) -> Result<Value>

Get the value at this path.

fields contains the structured path segments with per-field index keys. Path interpretation, including indexing (e.g. ["key"], [0]), is not implemented by OTTL; the integrator must implement this method. For applying index keys to a value, use crate::helpers::apply_indexes.

fn set<'a>( &self, ctx: &mut F::Context<'a>, fields: &[Field], value: &Value, ) -> Result<()>

Set the value at this path.

fields contains the structured path segments with per-field index keys. The integrator decides how to interpret the field chain and which keys to honour.

Implementors