tiny refactoring to reproduce duplication

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/deser/std/StdDeserializer.java

@@ -9,6 +9,7 @@
 import com.fasterxml.jackson.databind.*;
 import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
 import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
+import com.fasterxml.jackson.databind.util.ClassUtil;
 import com.fasterxml.jackson.databind.util.Converter;
 
 /**
@@ -75,11 +76,11 @@ public Class<?> handledType() {
      * {@link JacksonStdImpl} annotation on deserializer class.
      */
     protected boolean isDefaultDeserializer(JsonDeserializer<?> deserializer) {
-        return (deserializer != null && deserializer.getClass().getAnnotation(JacksonStdImpl.class) != null);
+        return ClassUtil.isJacksonStdImpl(deserializer);
     }
 
     protected boolean isDefaultKeyDeserializer(KeyDeserializer keyDeser) {
-        return (keyDeser != null && keyDeser.getClass().getAnnotation(JacksonStdImpl.class) != null);
+        return ClassUtil.isJacksonStdImpl(keyDeser);
     }
 
     /*

src/main/java/com/fasterxml/jackson/databind/ser/std/StdSerializer.java

@@ -14,6 +14,7 @@
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.fasterxml.jackson.databind.ser.FilterProvider;
 import com.fasterxml.jackson.databind.ser.PropertyFilter;
+import com.fasterxml.jackson.databind.util.ClassUtil;
 import com.fasterxml.jackson.databind.util.Converter;
 
 /**
@@ -225,7 +226,7 @@ public void wrapAndThrow(SerializerProvider provider,
      * {@link JacksonStdImpl} annotation on serializer class.
      */
     protected boolean isDefaultSerializer(JsonSerializer<?> serializer) {
-        return (serializer != null && serializer.getClass().getAnnotation(JacksonStdImpl.class) != null);
+        return ClassUtil.isJacksonStdImpl(serializer);
     }
 
     /**