Struct terminus_store::layer::ChildLayer

pub struct ChildLayer<M: 'static + AsRef<[u8]> + Clone + Send + Sync> { /* fields omitted */ }

A child layer.

This layer type has a parent. It stores triple additions and removals.

Methods

impl<M: 'static + AsRef<[u8]> + Clone + Send + Sync> ChildLayer<M>

pub fn load_from_files<F: FileLoad<Map = M> + FileStore + Clone>(
    name: [u32; 5],
    parent: Arc<dyn Layer>,
    files: &ChildLayerFiles<F>
) -> impl Future<Item = Self, Error = Error>

pub fn load(
    name: [u32; 5],
    parent: Arc<dyn Layer>,
    maps: ChildLayerMaps<M>
) -> ChildLayer<M>

Trait Implementations

impl<M: 'static + AsRef<[u8]> + Clone + Send + Sync> Layer for ChildLayer<M>

fn name(&self) -> [u32; 5]

The name of this layer.

fn parent(&self) -> Option<Arc<dyn Layer>>

The parent of this layer, or None if this is a base layer.

fn node_and_value_count(&self) -> usize

The amount of nodes and values known to this layer. This also counts entries in the parent.

fn predicate_count(&self) -> usize

The amount of predicates known to this layer. This also counts entries in the parent.

fn subject_id(&self, subject: &str) -> Option<u64>

The numerical id of a subject, or None if the subject cannot be found.

fn predicate_id(&self, predicate: &str) -> Option<u64>

The numerical id of a predicate, or None if the predicate cannot be found.

fn object_node_id(&self, node: &str) -> Option<u64>

The numerical id of a node object, or None if the node object cannot be found.

fn object_value_id(&self, value: &str) -> Option<u64>

The numerical id of a value object, or None if the value object cannot be found.

fn id_subject(&self, id: u64) -> Option<String>

The subject corresponding to a numerical id, or None if it cannot be found.

fn id_predicate(&self, id: u64) -> Option<String>

The predicate corresponding to a numerical id, or None if it cannot be found.

fn id_object(&self, id: u64) -> Option<ObjectType>

The object corresponding to a numerical id, or None if it cannot be found.

fn subjects(&self) -> Box<dyn Iterator<Item = Box<dyn SubjectLookup>>>

Returns an iterator over all triple data known to this layer.

fn subject_additions(&self) -> Box<dyn Iterator<Item = Box<dyn SubjectLookup>>>

Returns an iterator over all triple data added by this layer.

fn subject_removals(&self) -> Box<dyn Iterator<Item = Box<dyn SubjectLookup>>>

Returns an iterator over all triple data removed by this layer.

fn lookup_subject(&self, subject: u64) -> Option<Box<dyn SubjectLookup>>

Returns a SubjectLookup object for the given subject, or None if it cannot be constructed.

fn lookup_subject_addition(
    &self,
    subject: u64
) -> Option<Box<dyn SubjectLookup>>

Returns a SubjectLookup object for the given subject, or None if it cannot be constructed.

fn lookup_subject_removal(&self, subject: u64) -> Option<Box<dyn SubjectLookup>>

Returns a SubjectLookup object for the given subject, or None if it cannot be constructed.

fn objects(&self) -> Box<dyn Iterator<Item = Box<dyn ObjectLookup>>>

Returns an iterator over all objects known to this layer.

fn object_additions(&self) -> Box<dyn Iterator<Item = Box<dyn ObjectLookup>>>

Returns an iterator over all objects added by this layer.

fn object_removals(&self) -> Box<dyn Iterator<Item = Box<dyn ObjectLookup>>>

Returns an iterator over all objects removed by this layer.

fn lookup_object(&self, object: u64) -> Option<Box<dyn ObjectLookup>>

Returns an ObjectLookup for the given object, or None if it could not be constructed.

fn lookup_object_addition(&self, object: u64) -> Option<Box<dyn ObjectLookup>>

Returns an ObjectLookup for the given object, or None if it could not be constructed.

fn lookup_object_removal(&self, object: u64) -> Option<Box<dyn ObjectLookup>>

Returns an ObjectLookup for the given object, or None if it could not be constructed.

fn lookup_predicate(&self, predicate: u64) -> Option<Box<dyn PredicateLookup>>

Returns a PredicateLookup for the given predicate, or None if it could not be constructed.

fn lookup_predicate_addition(
    &self,
    predicate: u64
) -> Option<Box<dyn PredicateLookup>>

Returns a PredicateLookup for the given predicate, or None if it could not be constructed.

fn lookup_predicate_removal(
    &self,
    predicate: u64
) -> Option<Box<dyn PredicateLookup>>

Returns a PredicateLookup for the given predicate, or None if it could not be constructed.

fn clone_boxed(&self) -> Box<dyn Layer>

Return a clone of this layer in a box.

fn predicates(&self) -> Box<dyn Iterator<Item = Box<dyn PredicateLookup>>>

fn predicate_additions(
    &self
) -> Box<dyn Iterator<Item = Box<dyn PredicateLookup>>>

fn predicate_removals(
    &self
) -> Box<dyn Iterator<Item = Box<dyn PredicateLookup>>>

fn triple_exists(&self, subject: u64, predicate: u64, object: u64) -> bool

Returns true if the given triple exists, and false otherwise.

fn id_triple_exists(&self, triple: IdTriple) -> bool

Returns true if the given triple exists, and false otherwise.

fn string_triple_exists(&self, triple: &StringTriple) -> bool

Returns true if the given triple exists, and false otherwise.

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

Iterator over all triples known to this layer.

fn string_triple_to_id(&self, triple: &StringTriple) -> Option<IdTriple>

Convert a StringTriple to an IdTriple, returning None if any of the strings in the triple could not be resolved.

fn string_triple_to_partially_resolved(
    &self,
    triple: &StringTriple
) -> PartiallyResolvedTriple

Convert all known strings in the given string triple to ids.

fn id_triple_to_string(&self, triple: &IdTriple) -> Option<StringTriple>

Convert an id triple to the corresponding string version, returning None if any of those ids could not be converted.

fn is_ancestor_of(&self, other: &dyn Layer) -> bool

Returns true if the given layer is an ancestor of this layer, false otherwise.

impl<M: Clone + 'static + AsRef<[u8]> + Send + Sync> Clone for ChildLayer<M>

fn clone(&self) -> ChildLayer<M>

Returns a copy of the value.

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

Performs copy-assignment from source.