Struct BlobData

pub struct BlobData;

The storage table for blob data bytes.

Trait Implementations

impl Mappable for BlobData

type Key = <BlobData as Mappable>::OwnedKey

The key type is used during interaction with the storage. In most cases, it is the same as Self::OwnedKey.

type OwnedKey = BlobId

The owned type of the Key retrieving from the storage.

type OwnedValue = BlobBytes

The owned type of the Value retrieving from the storage.

type Value = [u8]

The value type is used while setting the value to the storage. In most cases, it is the same as Self::OwnedValue, but it is without restriction and can be used for performance optimizations.

impl StorageInspect<BlobData> for EmptyStorage

type Error = PredicateStorageError

fn get( &self, _: &BlobId, ) -> Result<Option<Cow<'_, <BlobData as Mappable>::OwnedValue>>, Self::Error>

Retrieve Cow<Value> such as Key->Value.

fn contains_key(&self, _: &BlobId) -> Result<bool, Self::Error>

Return true if there is a Key mapping to a value in the storage.

impl<D> StorageInspect<BlobData> for PredicateStorage<D>

where D: PredicateStorageRequirements,

type Error = PredicateStorageError

fn get( &self, key: &<BlobData as Mappable>::Key, ) -> Result<Option<Cow<'_, <BlobData as Mappable>::OwnedValue>>, Self::Error>

Retrieve Cow<Value> such as Key->Value.

fn contains_key( &self, key: &<BlobData as Mappable>::Key, ) -> Result<bool, Self::Error>

Return true if there is a Key mapping to a value in the storage.

impl StorageRead<BlobData> for EmptyStorage

fn read(&self, _: &BlobId, _: &mut [u8]) -> Result<Option<usize>, Self::Error>

Read the value stored at the given key into the provided buffer if the value exists.

fn read_alloc(&self, _: &BlobId) -> Result<Option<Vec<u8>>, Self::Error>

Same as read but allocates a new buffer and returns it.

impl<D> StorageRead<BlobData> for PredicateStorage<D>

where D: PredicateStorageRequirements,

fn read( &self, key: &<BlobData as Mappable>::Key, buf: &mut [u8], ) -> Result<Option<usize>, Self::Error>

Read the value stored at the given key into the provided buffer if the value exists.

fn read_alloc( &self, key: &<BlobData as Mappable>::Key, ) -> Result<Option<Vec<u8>>, Self::Error>

Same as read but allocates a new buffer and returns it.

impl StorageSize<BlobData> for EmptyStorage

fn size_of_value(&self, _: &BlobId) -> Result<Option<usize>, Self::Error>

Return the number of bytes stored at this key.

impl<D> StorageSize<BlobData> for PredicateStorage<D>

where D: PredicateStorageRequirements,

fn size_of_value( &self, key: &<BlobData as Mappable>::Key, ) -> Result<Option<usize>, Self::Error>

Return the number of bytes stored at this key.

impl<D> StorageWrite<BlobData> for PredicateStorage<D>

where D: PredicateStorageRequirements,

fn write_bytes( &mut self, _key: &<BlobData as Mappable>::Key, _buf: &[u8], ) -> Result<usize, Self::Error>

Write the bytes to the given key from the provided buffer.

fn replace_bytes( &mut self, _key: &<BlobData as Mappable>::Key, _buf: &[u8], ) -> Result<(usize, Option<Vec<u8>>), Self::Error>

Write the bytes to the given key from the provided buffer and return the previous bytes if it existed.

fn take_bytes( &mut self, _key: &<BlobData as Mappable>::Key, ) -> Result<Option<Vec<u8>>, Self::Error>

Removes a bytes from the storage and returning it without deserializing it.