[−][src]Trait terminus_store::layer::LayerObjectLookup

pub trait LayerObjectLookup {
    fn object(&self) -> u64;
    fn subject_predicate_pairs(&self) -> Box<dyn Iterator<Item = (u64, u64)>>;

    fn has_subject_predicate_pair(&self, subject: u64, predicate: u64) -> bool { ... }
    fn triple(&self, subject: u64, predicate: u64) -> Option<IdTriple> { ... }
    fn triples(&self) -> Box<dyn Iterator<Item = IdTriple>> { ... }
}

a trait that caches a lookup by object in a single layer's addition or removals.

Required methods

`fn object(&self) -> u64`

The object that this lookup is based on.

`fn subject_predicate_pairs(&self) -> Box<dyn Iterator<Item = (u64, u64)>>`

Returns an iterator over the subject-predicate pairs pointing at this object.

Loading content...

Provided methods

`fn has_subject_predicate_pair(&self, subject: u64, predicate: u64) -> bool`

Returns true if the object this lookup is for is connected to the given subject and predicater.

`fn triple(&self, subject: u64, predicate: u64) -> Option<IdTriple>`

Returns the triple consisting of the given subject and predicate, and the object this lookup is for, if it exists. None is returned otherwise.

`fn triples(&self) -> Box<dyn Iterator<Item = IdTriple>>`

Returns an iterator over all triples with the object of this lookup.

Loading content...

Implementors

Loading content...