Trait typed_store::traits::Map

pub trait Map<'a, K, V> where
    K: Serialize + DeserializeOwned + ?Sized,
    V: Serialize + DeserializeOwned, {
    type Error: Error;
    type Iterator: Iterator<Item = (K, V)>;
    type Keys: Iterator<Item = K>;
    type Values: Iterator<Item = V>;

    fn contains_key(&self, key: &K) -> Result<bool, Self::Error>;
    fn get(&self, key: &K) -> Result<Option<V>, Self::Error>;
    fn insert(&self, key: &K, value: &V) -> Result<(), Self::Error>;
    fn remove(&self, key: &K) -> Result<(), Self::Error>;
    fn clear(&self) -> Result<(), Self::Error>;
    fn is_empty(&self) -> bool;
    fn iter(&'a self) -> Self::Iterator;
    fn keys(&'a self) -> Self::Keys;
    fn values(&'a self) -> Self::Values;
    fn multi_get<J>(
        &self, 
        keys: impl IntoIterator<Item = J>
    ) -> Result<Vec<Option<V>>, Self::Error>
    where
        J: Borrow<K>;
    fn multi_insert<J, U>(
        &self, 
        key_val_pairs: impl IntoIterator<Item = (J, U)>
    ) -> Result<(), Self::Error>
    where
        J: Borrow<K>,
        U: Borrow<V>;
    fn multi_remove<J>(
        &self, 
        keys: impl IntoIterator<Item = J>
    ) -> Result<(), Self::Error>
    where
        J: Borrow<K>;

    fn get_or_insert<F: FnOnce() -> V>(
        &self, 
        key: &K, 
        default: F
    ) -> Result<V, Self::Error> { ... }
}

Required Associated Types

type Error: Error

type Iterator: Iterator<Item = (K, V)>

type Keys: Iterator<Item = K>

type Values: Iterator<Item = V>

Required Methods

fn contains_key(&self, key: &K) -> Result<bool, Self::Error>

Returns true if the map contains a value for the specified key.

fn get(&self, key: &K) -> Result<Option<V>, Self::Error>

Returns the value for the given key from the map, if it exists.

fn insert(&self, key: &K, value: &V) -> Result<(), Self::Error>

Inserts the given key-value pair into the map.

fn remove(&self, key: &K) -> Result<(), Self::Error>

Removes the entry for the given key from the map.

fn clear(&self) -> Result<(), Self::Error>

Removes every key-value pair from the map.

fn is_empty(&self) -> bool

Returns true if the map is empty, otherwise false.

fn iter(&'a self) -> Self::Iterator

Returns an iterator visiting each key-value pair in the map.

fn keys(&'a self) -> Self::Keys

Returns an iterator over each key in the map.

fn values(&'a self) -> Self::Values

Returns an iterator over each value in the map.

fn multi_get<J>(
    &self,
    keys: impl IntoIterator<Item = J>
) -> Result<Vec<Option<V>>, Self::Error> where
    J: Borrow<K>, 

Returns a vector of values corresponding to the keys provided.

fn multi_insert<J, U>(
    &self,
    key_val_pairs: impl IntoIterator<Item = (J, U)>
) -> Result<(), Self::Error> where
    J: Borrow<K>,
    U: Borrow<V>, 

Inserts key-value pairs.

fn multi_remove<J>(
    &self,
    keys: impl IntoIterator<Item = J>
) -> Result<(), Self::Error> where
    J: Borrow<K>, 

Removes keys.

Provided Methods

fn get_or_insert<F: FnOnce() -> V>(
    &self,
    key: &K,
    default: F
) -> Result<V, Self::Error>

Returns the value for the given key from the map, if it exists or the given default value if it does not.

Implementors

impl<'a, K, V> Map<'a, K, V> for DBMap<K, V> where
    K: Serialize + DeserializeOwned,
    V: Serialize + DeserializeOwned, 

type Error = TypedStoreError

type Iterator = Iter<'a, K, V>

type Keys = Keys<'a, K>

type Values = Values<'a, V>