JAVA-2025: Include exception message in AbstractMapCodec.accepts(null)

Follow on change for JAVA-2025 to also include check in
AbstractMapCodec.

Author: tolbertam

changelog/README.md

@@ -2,7 +2,7 @@
 
 ### 3.7.0 (In progress)
 
-- [improvement] JAVA-2025: Include exception message in AbstractCollectionCodec.accepts(null).
+- [improvement] JAVA-2025: Include exception message in Abstract*Codec.accepts(null).
 
 
 ### 3.6.0

driver-core/src/main/java/com/datastax/driver/core/TypeCodec.java

@@ -1944,6 +1944,7 @@ protected AbstractMapCodec(TypeCodec<K> keyCodec, TypeCodec<V> valueCodec) {
 
     @Override
     public boolean accepts(Object value) {
+      checkNotNull(value, "Parameter value cannot be null");
       if (value instanceof Map) {
         // runtime type ok, now check key and value types
         Map<?, ?> map = (Map<?, ?>) value;