ElementDataAccessor

Point data is typically cached on the native side. On the RN side, you fetch data on demand via an accessor. ElementDataAccessor also keeps a smaller cache of its own on the RN side: read methods such as get/getRange cache the values they fetch to avoid repeated cross-boundary reads, while write methods such as add/set/setRange clear that cache on success so subsequent reads see the latest data. This RN-side cache is separate from the native-side Element cache described in Element Caching and Release: releasing a whole Element (recycleElement/clearElementCache) also clears the accessor-level cache underneath it, but calling an accessor’s own clearCache() does not affect the native-side Element cache.

Method	Returns	Description
`size()`	`Promise<number>`	Get the dataset length
`get(index)`	`Promise<T \| null>`	Get the item at `index`
`getRange(startIndex, count)`	`Promise<T[]>`	Get a range of items
`add(index, value)`	`Promise<boolean>`	Insert an item at a specified position (clears cache on success)
`set(index, value)`	`Promise<boolean>`	Overwrite the item at `index` (clears cache on success)
`setRange(index, endIndex, valueArray)`	`Promise<boolean>`	Overwrite a range of items (clears cache on success)
`clearCache()`	`void`	Clear the RN-side cache
`getCacheStats()`	`{ cachedCount: number; totalSize: number }`	Get cache stats
`preload(startIndex, count)`	`Promise<void>`	Preload a range into cache
`isCached(index)`	`boolean`	Whether an item is already cached

If you know in advance that you’ll read a contiguous range of point data (e.g. rendering a stroke segment), call preload(startIndex, count) first to warm the cache, then read with get/getRange to reduce the number of cross-boundary calls.

ElementPointDataType

Point data types exposed by ElementDataAccessor (enum).

Enum	Value	Description
`ElementPointDataType.ANGLE_POINT`	`0`	angle points
`ElementPointDataType.CONTOUR_POINT`	`1`	contour points
`ElementPointDataType.STROKE_SAMPLE_POINT`	`2`	strokesample points
`ElementPointDataType.STROKE_PRESSURE_POINT`	`3`	stroke pressure points
`ElementPointDataType.ERASE_LINE_DATA`	`4`	erase line data
`ElementPointDataType.WRITE_FLAG`	`5`	write flag
`ElementPointDataType.MARK_PEN_DIRECTION`	`6`	marker pen direction
`ElementPointDataType.RECOGNITION_DATA_POINT`	`7`	recognition data points

​ElementPointDataType

ElementPointDataType