WorldWind Kotlin/earth.worldwind.layer.cache/BulkRetrievableElevationSourceFactory

BulkRetrievableElevationSourceFactory

interface BulkRetrievableElevationSourceFactory

Mixin for elevation source factories that can fetch one (z, x, y) tile through the cache-then-network pipeline with cache write-through. Implemented by every cached elevation factory — GpkgCachedElevationSourceFactory on JVM, CachedElevationSourceFactory on JS / iOS — so TiledElevationCoverage.launchBulkRetrieval can drive a bulk download without knowing the concrete factory type.

The "(layer-level network source) + CachedTileSource" wiring that the pre-Option-B TileSourceElevationSourceFactory used is no longer in play for cache-aware elevation, so the helper's dispatch is solely through this interface.

Inheritors

GpkgCachedElevationSourceFactory

CachedElevationSourceFactory

Functions

fetchAndCacheTile

abstract suspend fun fetchAndCacheTile(z: Int, x: Int, y: Int, overrideCache: Boolean = false): Boolean

Fetch the tile at (z, x, y) through the cache-then-network pipeline, write the result through to the cache on network success, and report whether the tile is now in the cache.