Struct dharitri_wasm::storage::mappers::MapStorageMapper

pub struct MapStorageMapper<SA, K, V>
where
    SA: StorageReadApi + StorageWriteApi + ErrorApi + Clone + 'static,
    K: TopEncode + TopDecode + 'static,
    V: StorageMapper<SA> + StorageClearable,
{ /* private fields */ }

Implementations

impl<SA, K, V> MapStorageMapper<SA, K, V>

where SA: StorageReadApi + StorageWriteApi + ErrorApi + Clone + 'static, K: TopEncode + TopDecode, V: StorageMapper<SA> + StorageClearable,

pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

pub fn len(&self) -> usize

Returns the number of elements in the map.

pub fn contains_key(&self, k: &K) -> bool

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

pub fn get(&self, k: &K) -> Option<V>

Gets a reference to the value in the entry.

pub fn insert_default(&mut self, k: K) -> bool

Adds a default value for the key, if it is not already present.

If the map did not have this key present, true is returned.

If the map did have this value present, false is returned.

pub fn get_or_insert_default(&mut self, k: K) -> V

Returns the value corresponding to the key.

If the key is not found, it is inserted and a new default value is returned.

pub fn remove(&mut self, k: &K) -> bool

Takes the value out of the entry, and returns it.

pub fn keys(&self) -> Iter<'_, SA, K>

An iterator visiting all keys in arbitrary order. The iterator element type is &'a K.

pub fn values(&self) -> Values<'_, SA, K, V>

An iterator visiting all values in arbitrary order. The iterator element type is &'a V.

pub fn iter(&self) -> Iter<'_, SA, K, V>

An iterator visiting all key-value pairs in arbitrary order. The iterator element type is (&'a K, &'a V).

Trait Implementations

impl<SA, K, V> StorageClearable for MapStorageMapper<SA, K, V>

where SA: StorageReadApi + StorageWriteApi + ErrorApi + Clone + 'static, K: TopEncode + TopDecode, V: StorageMapper<SA> + StorageClearable,

fn clear(&mut self)

Clears all the entries owned by the storage.

impl<SA, K, V> StorageMapper<SA> for MapStorageMapper<SA, K, V>

where SA: StorageReadApi + StorageWriteApi + ErrorApi + Clone + 'static, K: TopEncode + TopDecode, V: StorageMapper<SA> + StorageClearable,

fn new(api: SA, main_key: BoxedBytes) -> Self

Will be called automatically by the #[storage_mapper] annotation generated code.