diff --git a/Java/utils.twig b/Java/utils.twig
index f2622f4..9e4786e 100644
--- a/Java/utils.twig
+++ b/Java/utils.twig
@@ -257,12 +257,12 @@ inputStream.readBoolean()
                 and valueType.baseTypeName != "DateTime"
                 and (valueTopType.values is empty) %}
         {%- if valueTopType.allFieldsOrdered is empty %}
-        if ({{ object }} instanceof ApiModel) {
-        ((ApiModel) {{ object }}{%- if optional -%} .get() {%- endif -%}).validate();
+        if (((ApiModel) {{ object }}{%- if optional -%} .get() {%- endif -%}) instanceof ApiModel) {
+            ((ApiModel) {{ object }}{%- if optional -%} .get() {%- endif -%}).validate();
         } else if ({{ object }} instanceof List) {
-        validateCollection(((List) {{ object }}), CollectionValidationRule.EXCEPTION_IF_ANY_INVALID);
+            validateCollection(((List) {{ object }}), CollectionValidationRule.EXCEPTION_IF_ANY_INVALID);
         } else if ({{ object }} instanceof Map) {
-        validateCollection(((Map) {{ object }}).values(), CollectionValidationRule.EXCEPTION_IF_ANY_INVALID);
+            validateCollection(((Map) {{ object }}).values(), CollectionValidationRule.EXCEPTION_IF_ANY_INVALID);
         }
         {%- elseif optional %}
         if ({{ object }}.get() != null) {