Struct BlobFilter 

pub struct BlobFilter { /* private fields */ }

Filter for skipping blobs by element type during pipelined reads.

When a BlobFilter is set on an ElementReader, the pipeline skips decompressing blobs whose element type (from indexdata) does not match the filter. Files without indexdata are unaffected - all blobs pass through.

Example

use pbfhogg::{ElementReader, BlobFilter};

let reader = ElementReader::from_path("data.osm.pbf")?;
let reader = reader.with_blob_filter(BlobFilter::only_ways());
// Only way blobs are decompressed; node and relation blobs are skipped.

Implementations

impl BlobFilter

pub fn new(want_nodes: bool, want_ways: bool, want_relations: bool) -> Self

Create a filter that accepts only the specified element types.

pub fn only_nodes() -> Self

Filter that accepts only node blobs.

pub fn only_ways() -> Self

Filter that accepts only way blobs.

pub fn only_relations() -> Self

Filter that accepts only relation blobs.

pub fn with_node_bbox(self, bbox: BlobBbox) -> Self

Add a spatial bbox filter for node blobs. Node blobs whose coordinate bbox does not intersect the given bbox are skipped (no decompression).

Only effective on files with v2 indexdata. Blobs without spatial indexdata always pass through (conservative).

pub fn with_required_tag_keys(self, keys: Vec<String>) -> Self

Add required tag keys for blob-level tag filtering.

Blobs whose tag index contains none of these keys are skipped. Only effective on files with tag index data (BlobHeader field 4). Blobs without tag data always pass through (conservative).

pub fn with_required_tag_prefixes(self, prefixes: Vec<String>) -> Self

Add required tag key prefixes for blob-level tag filtering.

Blobs whose tag index contains no key starting with any of these prefixes are skipped (e.g. addr: matches addr:city, addr:street).

Trait Implementations

impl Clone for BlobFilter

fn clone(&self) -> BlobFilter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BlobFilter

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

Formats the value using the given formatter.