Merge pull request #153 from ml-in-programming/validator-fix

Fix validator check

Author: ujohnny

validator/src/main/java/org/jetbrains/research/groups/ml_methods/refactoring/validation/InputSessionValidator.java

@@ -95,7 +95,11 @@ private boolean isCorrectPayload(String payload) {
                     || !json.containsKey(UNCHECKED_TAG)
                     || !json.containsKey(REJECTED_TAG)
                     || !json.containsKey(APPLIED_TAG)
-                    || ((ArrayList) json.get(APPLIED_TAG)).isEmpty()) {
+                    || ( ((ArrayList) json.get(UNCHECKED_TAG)).isEmpty() &&
+                         ((ArrayList) json.get(REJECTED_TAG)).isEmpty() &&
+                         ((ArrayList) json.get(APPLIED_TAG)).isEmpty()
+                       )
+            ) {
                 return false;
             }
         } catch (JsonSyntaxException ignored) {