Cached
Cache-first decorator over a BulkFeatureSource. On fetchAll:
If store has any bulk rows, return them as-is (no network).
Otherwise stream from inner, emit rows to the caller as they arrive, accumulate them, and atomically FeatureStore.replaceAll when the inner flow completes.
When inner is null, this acts as a pure cache view — useful for replaying a GPKG file offline. A network failure with an empty cache yields an empty flow.
Streaming preserves incremental-render behaviour for paginated WFS responses; the cache write happens once, atomically, after the full fetch succeeds.
Properties
When true, fetchAll never calls inner — cache content is returned as-is and a cold cache yields an empty flow. Mirrors CachedTileSource.isCacheOnly.
The wrapped upstream feature source. Exposed for rebind flows — attachCache extractors peel this off when the layer is already cache-attached.
Functions
Populate the store once from inner (a full download), then serve only the rows intersecting sector from its spatial index — offline and viewport-bounded thereafter. An already-populated store (e.g. a prior session) skips the download.