Make NativeMemoryMap KEY_TYPE and VALUE_TYPE extend Any to disallow nullable types.

Author: aaronriekenberg

src/main/kotlin/com/target/nativememoryallocator/map/NativeMemoryMap.kt

@@ -32,8 +32,9 @@ interface BaseNativeMemoryMap {
  * Keys are stored as normal on-heap objects in the map.
  * Each value is serialized using NativeMemoryMapSerializer and copied into a NativeMemoryBuffer.
  * NativeMemoryMap is safe for use by multiple concurrent threads.
+ * [KEY_TYPE] and [VALUE_TYPE] extend [Any] to disallow nullable key and value types.
  */
-interface NativeMemoryMap<KEY_TYPE, VALUE_TYPE> : BaseNativeMemoryMap {
+interface NativeMemoryMap<KEY_TYPE : Any, VALUE_TYPE : Any> : BaseNativeMemoryMap {
 
     /**
      * The result of a put operation on the map.

src/main/kotlin/com/target/nativememoryallocator/map/NativeMemoryMapBuilder.kt

@@ -71,7 +71,7 @@ interface CaffeineConfigBuilder {
  * @property threadLocalOnHeapReadBufferInitialCapacityBytes initial capacity in bytes for [ThreadLocal] on-heap read buffers.
  * @property caffeineConfigFunction caffeine config function
  */
-data class NativeMemoryMapBuilder<KEY_TYPE, VALUE_TYPE>(
+data class NativeMemoryMapBuilder<KEY_TYPE : Any, VALUE_TYPE : Any>(
     private val valueSerializer: NativeMemoryMapSerializer<VALUE_TYPE>,
     private val nativeMemoryAllocator: NativeMemoryAllocator,
     private val enableOperationCounters: Boolean = false,
@@ -89,7 +89,7 @@ data class NativeMemoryMapBuilder<KEY_TYPE, VALUE_TYPE>(
 
         val nativeMemoryMap = when (backend) {
             NativeMemoryMapBackend.CONCURRENT_HASH_MAP -> {
-                NativeMemoryMapImpl(
+                NativeMemoryMapImpl<KEY_TYPE, VALUE_TYPE>(
                     valueSerializer = valueSerializer,
                     nativeMemoryAllocator = nativeMemoryAllocator,
                     useThreadLocalOnHeapReadBuffer = useThreadLocalOnHeapReadBuffer,

src/main/kotlin/com/target/nativememoryallocator/map/impl/CaffeineNativeMemoryMapImpl.kt

@@ -102,7 +102,7 @@ internal fun <KEY_TYPE> buildCaffeineCache(
  * @param caffeineCache caffeine cache instance
  * @param nativeMemoryMap [NativeMemoryMap] instance for delegation
  */
-internal class CaffeineNativeMemoryMapImpl<KEY_TYPE, VALUE_TYPE>(
+internal class CaffeineNativeMemoryMapImpl<KEY_TYPE : Any, VALUE_TYPE : Any>(
     private val caffeineCache: Cache<KEY_TYPE, NativeMemoryBuffer>,
     nativeMemoryMap: NativeMemoryMap<KEY_TYPE, VALUE_TYPE>,
 ) : NativeMemoryMap<KEY_TYPE, VALUE_TYPE> by nativeMemoryMap {

src/main/kotlin/com/target/nativememoryallocator/map/impl/NativeMemoryMapImpl.kt

@@ -24,7 +24,7 @@ import java.util.concurrent.ConcurrentMap
  * @param threadLocalOnHeapReadBufferInitialCapacityBytes initial capacity in bytes for [ThreadLocal] on-heap read buffers.
  * @param cacheMap [ConcurrentMap] of keys to [NativeMemoryBuffer] backing this map instance.
  */
-internal class NativeMemoryMapImpl<KEY_TYPE, VALUE_TYPE>(
+internal class NativeMemoryMapImpl<KEY_TYPE : Any, VALUE_TYPE : Any>(
     private val valueSerializer: NativeMemoryMapSerializer<VALUE_TYPE>,
     private val nativeMemoryAllocator: NativeMemoryAllocator,
     useThreadLocalOnHeapReadBuffer: Boolean,

src/main/kotlin/com/target/nativememoryallocator/map/impl/OperationCountedNativeMemoryMapImpl.kt

@@ -50,7 +50,7 @@ internal data class OperationCountersImpl(
  *
  * @param nativeMemoryMap [NativeMemoryMap] instance for delegation.
  */
-internal class OperationCountedNativeMemoryMapImpl<KEY_TYPE, VALUE_TYPE>(
+internal class OperationCountedNativeMemoryMapImpl<KEY_TYPE : Any, VALUE_TYPE : Any>(
     private val nativeMemoryMap: NativeMemoryMap<KEY_TYPE, VALUE_TYPE>,
 ) : NativeMemoryMap<KEY_TYPE, VALUE_TYPE> by nativeMemoryMap {