yet more work on merging; avoid unnecessary set

1 files changed, 11 insertions, 1 deletions

diff --git a/src/main/java/com/fasterxml/jackson/databind/deser/AbstractDeserializer.java b/src/main/java/com/fasterxml/jackson/databind/deser/AbstractDeserializer.java
index d00a9318f..c6cfeb37e 100644
--- a/src/main/java/com/fasterxml/jackson/databind/deser/AbstractDeserializer.java
+++ b/src/main/java/com/fasterxml/jackson/databind/deser/AbstractDeserializer.java
@@ -82,7 +82,17 @@ public class AbstractDeserializer
     
     @Override
     public boolean isCachable() { return true; }
-    
+
+    @Override // since 2.9
+    public Boolean supportsUpdate(DeserializationConfig config) {
+        /* 23-Oct-2016, tatu: Not exactly sure what to do with this; polymorphic
+         *   type handling seems bit risky so for now claim it "may or may not be"
+         *   possible, which does allow explicit per-type/per-property merging attempts,
+         *   but avoids general-configuration merges
+         */
+        return null;
+    }
+
     /**
      * Overridden to return true for those instances that are
      * handling value for which Object Identity handling is enabled