Struct GridArrayReader 

pub struct GridArrayReader { /* private fields */ }

Provides random access to individual GridArrays in a compressed file without loading the entire collection.

Useful for efficient access to large PDF sets where only a subset of members is needed.

Implementations

impl GridArrayReader

pub fn from_file<P: AsRef<Path>>(path: P) -> Result<Self, Box<dyn Error>>

Creates a new reader from a file, enabling random access to grid members.

This method automatically handles backward compatibility with v0.2.0 files. If reading with the current format fails, it falls back to using the legacy loader.

Arguments

• path - Input file path.

Returns

A GridArrayReader instance on success, or an error if reading fails.

pub fn len(&self) -> usize

Returns the number of grid arrays in the collection.

pub fn is_empty(&self) -> bool

Returns true if the collection is empty.

pub fn metadata(&self) -> &Arc<MetaData>

Returns a reference to the shared metadata.

pub fn load_grid( &self, index: usize, ) -> Result<GridArrayWithMetadata, Box<dyn Error>>

Loads a specific GridArrayWithMetadata by index.

Arguments

• index - The index of the grid to load.

Returns

The requested GridArrayWithMetadata on success, or an error if the index is out of bounds or reading fails.