Struct holochain_cas_implementations::eav::file::EavFileStorage

pub struct EavFileStorage { /* fields omitted */ }

Methods

impl EavFileStorage

pub fn new(dir_path: String) -> HcResult<EavFileStorage>

Trait Implementations

impl Clone for EavFileStorage

fn clone(&self) -> EavFileStorage

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq<EavFileStorage> for EavFileStorage

fn eq(&self, other: &EavFileStorage) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &EavFileStorage) -> bool

This method tests for !=.

impl Debug for EavFileStorage

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

Formats the value using the given formatter.

impl EntityAttributeValueStorage for EavFileStorage

fn add_eav(&mut self, eav: &EntityAttributeValue) -> Result<(), HolochainError>

adds the given EntityAttributeValue to the EntityAttributeValueStorage append only storage eavs are retrieved through constraint based lookups @see fetch_eav

fn fetch_eav(     &self,     entity: Option<Entity>,     attribute: Option<Attribute>,     value: Option<Value> ) -> Result<HashSet<EntityAttributeValue>, HolochainError>

fetches the set of EntityAttributeValues that match constraints None = no constraint Some(Entity) = requires the given entity (e.g. all a/v pairs for the entity) Some(Attribute) = requires the given attribute (e.g. all links) Some(Value) = requires the given value (e.g. all entities referencing an Address)