From 6e53f9c05515970b8e9307fe41b89b9feffd3be7 Mon Sep 17 00:00:00 2001
From: Shawn <shawn.ck.yang@gmail.com>
Date: Sun, 6 Aug 2023 16:21:08 +0800
Subject: [PATCH] [Java] use java.lang.ClassValue to cache Lookup (#844)

* use java.lang.ClassValue to cache lookup

* lint code

* lint code
---
 .../src/main/java/io/fury/util/unsafe/_JDKAccess.java  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/java/fury-core/src/main/java/io/fury/util/unsafe/_JDKAccess.java b/java/fury-core/src/main/java/io/fury/util/unsafe/_JDKAccess.java
index 6919c60a86..775247c460 100644
--- a/java/fury-core/src/main/java/io/fury/util/unsafe/_JDKAccess.java
+++ b/java/fury-core/src/main/java/io/fury/util/unsafe/_JDKAccess.java
@@ -73,11 +73,19 @@ public class _JDKAccess {
     }
   }
 
+  private static final ClassValue<Lookup> lookupCache =
+      new ClassValue<Lookup>() {
+        @Override
+        protected Lookup computeValue(Class type) {
+          return _Lookup._trustedLookup(type);
+        }
+      };
+
   // CHECKSTYLE.OFF:MethodName
 
   public static Lookup _trustedLookup(Class<?> objectClass) {
     // CHECKSTYLE.ON:MethodName
-    return _Lookup._trustedLookup(objectClass);
+    return lookupCache.get(objectClass);
   }
 
   public static <T> T tryMakeFunction(