Struct CachedDataset

pub struct CachedDataset<D: Dataset> { /* private fields */ }

A Dataset that uses a disk directory as its cache, useful when calls to get() are expensive. Created using Dataset::cached().

Trait Implementations

impl<D: Dataset> Dataset for CachedDataset<D>

where D::Item: Serialize + DeserializeOwned,

type Item = <D as Dataset>::Item

The type of objects procured by the Dataset.

fn len(&self) -> usize

The number of objects in the Dataset.

fn get(&self, index: usize) -> Self::Item

Get the index’th element, where 0 <= index < len()

fn cached(self, cache_dir: impl Into<PathBuf>) -> CachedDataset<Self>

where Self: Sized,

Modifies the dataset to check a cache directory before reading. If the cache entry is present, it’s used instead of the underlying get(). If the cache entry is absent, it will be created after calling get().

fn iter(&self) -> Box<dyn Iterator<Item = Self::Item> + '_>

Produces an Iterator that produces the entire Dataset in indexed order.