more work for #2539

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/deser/BasicDeserializerFactory.java

@@ -1756,7 +1756,8 @@ public JsonDeserializer<?> findDefaultDeserializer(DeserializationContext ctxt,
      *
      * @since 3.0
      */
-    protected boolean hasExplicitDeserializerFor(Class<?> valueType) {
+    @Override
+    public boolean hasExplicitDeserializerFor(Class<?> valueType) {
         // Yes, we handle all Enum types
         if (Enum.class.isAssignableFrom(valueType)) {
             return true;

src/main/java/com/fasterxml/jackson/databind/deser/DeserializerFactory.java

@@ -136,6 +136,15 @@ public abstract KeyDeserializer createKeyDeserializer(DeserializationContext ctx
             JavaType type)
         throws JsonMappingException;
 
+    /**
+     * Method that can be used to check if databind module has deserializer
+     * for given (likely JDK) type: explicit meaning that it is not automatically
+     * generated for POJO.
+     *<p>
+     * This matches {@link Deserializers#hasDeserializerFor(Class)} method.
+     */
+    public abstract boolean hasExplicitDeserializerFor(Class<?> valueType);
+
     /*
     /**********************************************************************
     /* Mutant factories for registering additional configuration