Struct Query 

pub struct Query { /* private fields */ }

Query builder. Spec §B.7.

Implementations

impl Query

pub fn new() -> Self

Constructor.

pub fn topic(self, topic: &str) -> Result<Self, QueryError>

Topic filter — only objects of this topic.

Errors

EmptyTopic if the filter is an empty string.

pub fn state(self, state: ObjectState) -> Self

State filter.

pub fn filter<F>(self, f: F) -> Self

where F: Fn(&ObjectRef) -> bool + Send + Sync + 'static,

Custom filter.

pub fn order_by<F>(self, order: SortOrder, key_fn: F) -> Self

where F: Fn(&ObjectRef) -> Vec<u8> + Send + Sync + 'static,

Sorting — the caller supplies a key-extraction function.

pub fn limit(self, limit: usize) -> Result<Self, QueryError>

Limit.

Errors

LimitTooLarge if limit > u32::MAX.

pub fn execute(&self, cache: &ObjectCache) -> QueryResult

Spec §B.7.1 — execute the query against an ObjectCache.

Trait Implementations

impl Debug for Query

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

Formats the value using the given formatter.

impl Default for Query

fn default() -> Self

Returns the “default value” for a type.