chaokunyang commented on code in PR #2338:
URL: https://github.com/apache/fory/pull/2338#discussion_r2153786941


##########
java/fory-format/src/main/java/org/apache/fory/format/encoder/BaseBinaryEncoderBuilder.java:
##########
@@ -164,15 +167,21 @@ protected Expression serializeFor(
           serializeFor(
               ordinal, newInputObject, writer, rewrittenType, arrowField, 
visitedCustomTypes);
       return new If(
-          ExpressionUtils.eqNull(inputObject),
+          new Expression.IsNull(inputObject),
           new Invoke(writer, "setNullAt", ordinal),
           doSerialize);
     } else if (rawType == Optional.class) {
       TypeRef<?> elemType = TypeUtils.getTypeArguments(typeRef).get(0);
       Invoke orNull =
-          new Invoke(inputObject, "orElse", TypeUtils.OBJECT_TYPE, new 
Expression.Null(elemType));
+          new Invoke(
+              inputObject,
+              "orElse",
+              "",
+              TypeUtils.OBJECT_TYPE,
+              true,
+              new Expression.Null(elemType));
       Expression unwrapped =
-          new If(ExpressionUtils.eqNull(inputObject), new 
Expression.Null(elemType), orNull);

Review Comment:
   Introduce a local variable made teh code bloat a little, so if this variable 
is used only once, fory just use `ExpressionUtils.eqNull` directly



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