From bf6e8fe27719170568c31243f32478065d38f644 Mon Sep 17 00:00:00 2001
From: Michiel Oliemans <oliemans@scopisto.com>
Date: Sun, 21 Apr 2019 08:15:12 +0200
Subject: [PATCH] Do not require variables to be non null but initialize empty
 (fix #168)

---
 src/main/java/graphql/servlet/internal/GraphQLRequest.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/main/java/graphql/servlet/internal/GraphQLRequest.java b/src/main/java/graphql/servlet/internal/GraphQLRequest.java
index 95493ee8..c7e3e625 100644
--- a/src/main/java/graphql/servlet/internal/GraphQLRequest.java
+++ b/src/main/java/graphql/servlet/internal/GraphQLRequest.java
@@ -5,7 +5,6 @@
 
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Objects;
 
 /**
  * @author Andrew Potter
@@ -41,7 +40,9 @@ public Map<String, Object> getVariables() {
     }
 
     public void setVariables(Map<String, Object> variables) {
-        this.variables = Objects.requireNonNull(variables);
+        if (variables != null) {
+            this.variables = variables;
+        }
     }
 
     public String getOperationName() {