Struct CachedFileMetadata 

pub struct CachedFileMetadata {
    pub meta: ObjectMeta,
    pub statistics: Arc<Statistics>,
    pub ordering: Option<LexOrdering>,
}

Cached metadata for a file, including statistics and ordering.

This struct embeds the ObjectMeta used for cache validation, along with the cached statistics and ordering information.

Fields

meta: ObjectMeta

File metadata used for cache validation (size, last_modified).

statistics: Arc<Statistics>

Cached statistics for the file, if available.

ordering: Option<LexOrdering>

Cached ordering for the file.

Implementations

impl CachedFileMetadata

pub fn new( meta: ObjectMeta, statistics: Arc<Statistics>, ordering: Option<LexOrdering>, ) -> Self

Create a new cached file metadata entry.

pub fn is_valid_for(&self, current_meta: &ObjectMeta) -> bool

Check if this cached entry is still valid for the given metadata.

Returns true if the file size and last modified time match.

Trait Implementations

impl CacheAccessor<TableScopedPath, CachedFileMetadata> for DefaultFileStatisticsCache

fn get(&self, key: &TableScopedPath) -> Option<CachedFileMetadata>

Get a cached entry if it exists.

fn put( &self, key: &TableScopedPath, value: CachedFileMetadata, ) -> Option<CachedFileMetadata>

Store a value in the cache.

fn remove(&self, key: &TableScopedPath) -> Option<CachedFileMetadata>

Remove an entry from the cache, returning the value if it existed.

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

Check if the cache contains a specific key.

fn len(&self) -> usize

Fetch the total number of cache entries.

fn clear(&self)

Remove all entries from the cache.

fn name(&self) -> String

Return the cache name.

fn is_empty(&self) -> bool

Check if the cache collection is empty.

impl Clone for CachedFileMetadata

fn clone(&self) -> CachedFileMetadata

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl DFHeapSize for CachedFileMetadata

fn heap_size(&self, ctx: &mut DFHeapSizeCtx) -> usize

Return the size of any bytes allocated on the heap by this object, including heap memory in those structures

impl Debug for CachedFileMetadata

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for CachedFileMetadata

impl PartialEq for CachedFileMetadata

fn eq(&self, other: &CachedFileMetadata) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CachedFileMetadata