From 3d533da982a3751a2180444f2cc34bbe6b3675d7 Mon Sep 17 00:00:00 2001
From: Patrick Strawderman <pstrawderman@netflix.com>
Date: Fri, 24 Jan 2025 10:54:43 -0800
Subject: [PATCH] Use a singleton for empty raw / coerced variables

Make CoercedVariables.emptyVariables() and RawVariables.emptyVariables() return an immutable singleton instance.
---
 src/main/java/graphql/execution/CoercedVariables.java | 3 ++-
 src/main/java/graphql/execution/RawVariables.java     | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main/java/graphql/execution/CoercedVariables.java b/src/main/java/graphql/execution/CoercedVariables.java
index feeed4fb56..6123aeec82 100644
--- a/src/main/java/graphql/execution/CoercedVariables.java
+++ b/src/main/java/graphql/execution/CoercedVariables.java
@@ -11,6 +11,7 @@
  */
 @PublicApi
 public class CoercedVariables {
+    private static final CoercedVariables EMPTY = CoercedVariables.of(ImmutableKit.emptyMap());
     private final ImmutableMapWithNullValues<String, Object> coercedVariables;
 
     public CoercedVariables(Map<String, Object> coercedVariables) {
@@ -30,7 +31,7 @@ public Object get(String key) {
     }
 
     public static CoercedVariables emptyVariables() {
-        return new CoercedVariables(ImmutableKit.emptyMap());
+        return EMPTY;
     }
 
     public static CoercedVariables of(Map<String, Object> coercedVariables) {
diff --git a/src/main/java/graphql/execution/RawVariables.java b/src/main/java/graphql/execution/RawVariables.java
index 02e1acabe2..d7c1fba61b 100644
--- a/src/main/java/graphql/execution/RawVariables.java
+++ b/src/main/java/graphql/execution/RawVariables.java
@@ -11,6 +11,7 @@
  */
 @PublicApi
 public class RawVariables {
+    private static final RawVariables EMPTY = RawVariables.of(ImmutableKit.emptyMap());
     private final ImmutableMapWithNullValues<String, Object> rawVariables;
 
     public RawVariables(Map<String, Object> rawVariables) {
@@ -30,7 +31,7 @@ public Object get(String key) {
     }
 
     public static RawVariables emptyVariables() {
-        return RawVariables.of(ImmutableKit.emptyMap());
+        return EMPTY;
     }
 
     public static RawVariables of(Map<String, Object> rawVariables) {