Struct ProjectionConfig 

pub struct ProjectionConfig { /* private fields */ }

Configuration for field projection during parsing.

Stores per-protocol field sets that control which fields are extracted. Fields not in the set are skipped during parsing, reducing CPU usage.

Implementations

impl ProjectionConfig

pub fn new() -> Self

Create a new empty projection configuration.

pub fn with_chain_fields(self) -> Self

Create configuration that includes chain fields.

Chain fields are those needed to detect and parse child protocols, such as IP protocol number or TCP/UDP ports.

pub fn without_chain_fields(self) -> Self

Disable automatic inclusion of chain fields.

pub fn add_protocol_fields<I, S>(&mut self, protocol: &str, fields: I)

where I: IntoIterator<Item = S>, S: AsRef<str>,

Add required fields for a protocol.

Arguments

• protocol - Protocol name (e.g., “tcp”, “dns”)
• fields - Field names to extract (e.g., “src_port”, “dst_port”)

pub fn with_protocol_fields<I, S>(self, protocol: &str, fields: I) -> Self

where I: IntoIterator<Item = S>, S: AsRef<str>,

Builder-style method to add protocol fields.

pub fn get(&self, protocol: &str) -> Option<&HashSet<String>>

Get the projection for a specific protocol.

Returns None if no projection is configured for this protocol, meaning all fields should be extracted.

pub fn is_empty(&self) -> bool

Check if any projection is configured.

pub fn include_chain_fields(&self) -> bool

Check if chain fields should be included.

pub fn protocols(&self) -> impl Iterator<Item = &str>

Get all protocol names with configured projections.

pub fn from_field_names<I, S>(protocol: &str, field_names: I) -> Self

where I: IntoIterator<Item = S>, S: AsRef<str>,

Create a projection config from DataFusion projection indices.

Converts projection indices to field names based on schema.

Arguments

• protocol - Protocol name
• field_names - Iterator of field names to include

Trait Implementations

impl Clone for ProjectionConfig

fn clone(&self) -> ProjectionConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProjectionConfig

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

Formats the value using the given formatter.

impl Default for ProjectionConfig

fn default() -> ProjectionConfig

Returns the “default value” for a type.