[I] GeoPackage reader throws NullPointerException on a NULL geometry [sedona]

["Mayukh-D (via GitHub)" <gi...@apache.org>]

Mayukh-D opened a new issue, #3502:
URL: https://github.com/apache/sedona/issues/3502

   ### Expected behavior
   
   A NULL in a geometry column of a GeoPackage feature table is read as a `null` geometry. NULL geometries are valid in GeoPackage, and GDAL reads such files without error.
   
   ### Actual behavior
   
   The scan aborts as soon as an action reads the table (for example `count()`). `ValuesMapper` passes `rs.getBytes(column)` for every geometry column to `GeometryReader.extractWKB`, which calls `ByteBuffer.wrap` on it straight away. For a NULL cell the driver returns a null array:
   
   ```
   java.lang.NullPointerException: Cannot read the array length because "array" is null
     at java.base/java.nio.ByteBuffer.wrap(ByteBuffer.java:437)
     at org.apache.sedona.sql.datasources.geopackage.transform.GeometryReader$.extractWKB(GeometryReader.scala:30)
     at org.apache.sedona.sql.datasources.geopackage.transform.ValuesMapper$.$anonfun$mapValues$1(ValuesMapper.scala:61)
   ```
   
   ### Steps to reproduce
   
   Read any GeoPackage feature table that has a row with a NULL geometry and call `count()`. Reported in discussion #3500, which links a public example file. Also reproduces on master.
   
   ### Sedona version
   
   1.8.1
   
   ### Apache Spark version
   
   4.0.0
   
   ### API type
   
   Scala
   
   ### Scala version
   
   2.13
   
   ### JRE version
   
   21
   
   ### Environment
   
   Local
   
   ### Existing issues
   
   - [x] I searched the existing issues and did not find a duplicate.
   


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