Struct mentat_db::cache::AttributeCaches

pub struct AttributeCaches { /* fields omitted */ }

Methods

impl AttributeCaches

pub fn unregister_attribute<U>(&mut self, attribute: U) where     U: Into<Entid>,

impl AttributeCaches

pub fn forward_attribute_cache_for_attribute<'a, 's>(     &'a self,     schema: &'s Schema,     a: Entid ) -> Option<&'a AttributeCache>

Return a reference to the cache for the provided a, if a names an attribute that is cached in the forward direction. If a doesn't name an attribute, or it's not cached at all, or it's only cached in reverse (v to e, not e to v), None is returned.

pub fn extend_cache_for_entities_and_attributes<'s, 'c>(     &mut self,     schema: &'s Schema,     sqlite: &'c Connection,     attrs: AttributeSpec,     entities: &Vec<Entid> ) -> Result<()>

Fetch the requested entities and attributes from the store and put them in the cache. The caller is responsible for ensuring that entities is unique. Attributes for which every entity is already cached will not be processed again.

pub fn make_cache_for_entities_and_attributes<'s, 'c>(     schema: &'s Schema,     sqlite: &'c Connection,     attrs: AttributeSpec,     entities: &Vec<Entid> ) -> Result<AttributeCaches>

Fetch the requested entities and attributes and put them in a new cache. The caller is responsible for ensuring that entities is unique.

Trait Implementations

impl Clone for AttributeCaches

fn clone(&self) -> AttributeCaches

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AttributeCaches

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for AttributeCaches

fn default() -> AttributeCaches

Returns the "default value" for a type.

impl CachedAttributes for AttributeCaches

fn get_values_for_entid(     &self,     schema: &Schema,     attribute: Entid,     entid: Entid ) -> Option<&Vec<TypedValue>>

fn get_value_for_entid(     &self,     schema: &Schema,     attribute: Entid,     entid: Entid ) -> Option<&TypedValue>

fn has_cached_attributes(&self) -> bool

fn is_attribute_cached_reverse(&self, attribute: Entid) -> bool

fn is_attribute_cached_forward(&self, attribute: Entid) -> bool

fn get_entid_for_value(     &self,     attribute: Entid,     value: &TypedValue ) -> Option<Entid>

Reverse lookup.

fn get_entids_for_value(     &self,     attribute: Entid,     value: &TypedValue ) -> Option<&BTreeSet<Entid>>

impl UpdateableCache for AttributeCaches

fn update<I>(     &mut self,     schema: &Schema,     retractions: I,     assertions: I ) -> Result<()> where     I: Iterator<Item = (Entid, Entid, TypedValue)>,