Trait tc_btree::BTreeInstance

pub trait BTreeInstance: Clone + Instance {
    type Slice: BTreeInstance;

    fn collator(&self) -> &ValueCollator;
    fn schema(&self) -> &RowSchema;
    fn slice(self, range: Range, reverse: bool) -> TCResult<Self::Slice>;
    fn is_empty<'life0, 'async_trait>(
        &'life0 self,
        txn_id: TxnId
    ) -> Pin<Box<dyn Future<Output = TCResult<bool>> + Send + 'async_trait>>
    where
        Self: 'async_trait,
        'life0: 'async_trait;
    fn keys<'a, 'async_trait>(
        self,
        txn_id: TxnId
    ) -> Pin<Box<dyn Future<Output = TCResult<TCBoxTryStream<'a, Key>>> + Send + 'async_trait>>
    where
        Self: 'a + 'async_trait,
        'a: 'async_trait;
    fn validate_key(&self, key: Key) -> TCResult<Key>;

    fn count<'life0, 'async_trait>(
        &'life0 self,
        txn_id: TxnId
    ) -> Pin<Box<dyn Future<Output = TCResult<u64>> + Send + 'async_trait>>
    where
        Self: Sync + 'async_trait,
        'life0: 'async_trait,
    { ... }
}

Common BTree methods.

Required Associated Types

type Slice: BTreeInstance

Required Methods

fn collator(&self) -> &ValueCollator

Borrow this BTree’s collator.

fn schema(&self) -> &RowSchema

Borrow to this BTree’s schema.

fn slice(self, range: Range, reverse: bool) -> TCResult<Self::Slice>

Return a slice of this BTree with the given range.

fn is_empty<'life0, 'async_trait>(
    &'life0 self,
    txn_id: TxnId
) -> Pin<Box<dyn Future<Output = TCResult<bool>> + Send + 'async_trait>>where
    Self: 'async_trait,
    'life0: 'async_trait,

Return true if this BTree has no Keys.

fn keys<'a, 'async_trait>(
    self,
    txn_id: TxnId
) -> Pin<Box<dyn Future<Output = TCResult<TCBoxTryStream<'a, Key>>> + Send + 'async_trait>>where
    Self: 'a + 'async_trait,
    'a: 'async_trait,

Return a Stream of this BTree’s Keys.

fn validate_key(&self, key: Key) -> TCResult<Key>

Return an error if the given key does not match this BTree’s schema

If the key is valid, this will return a copy with the data types correctly casted.

Provided Methods

fn count<'life0, 'async_trait>(
    &'life0 self,
    txn_id: TxnId
) -> Pin<Box<dyn Future<Output = TCResult<u64>> + Send + 'async_trait>>where
    Self: Sync + 'async_trait,
    'life0: 'async_trait,

Return the number of Keys in this BTree.

Implementors

impl<F, D, T> BTreeInstance for BTree<F, D, T>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    T: Transaction<D>,

type Slice = BTree<F, D, T>

impl<F, D, T> BTreeInstance for BTreeFile<F, D, T>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    T: Transaction<D>,
    BTreeSlice<F, D, T>: 'static,
    Self: Clone,

type Slice = BTreeSlice<F, D, T>

impl<F, D, T> BTreeInstance for BTreeSlice<F, D, T>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    T: Transaction<D>,

type Slice = BTreeSlice<F, D, T>