From 67ed33112465398db44ee9555d1791776ef8f0c7 Mon Sep 17 00:00:00 2001
From: belugabehr <12578579+belugabehr@users.noreply.github.com>
Date: Sat, 14 Sep 2024 14:04:48 -0400
Subject: [PATCH] AVRO-4050: Deprecate MapUtil computeIfAbsent (#3142)

---
 .../src/main/java/org/apache/avro/reflect/ReflectData.java | 3 +--
 .../main/java/org/apache/avro/specific/SpecificData.java   | 3 +--
 .../avro/src/main/java/org/apache/avro/util/MapUtil.java   | 7 ++++---
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java b/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
index 0c0b10478a5..95fc9598c90 100644
--- a/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
+++ b/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java
@@ -36,7 +36,6 @@
 import org.apache.avro.specific.FixedSize;
 import org.apache.avro.specific.SpecificData;
 import org.apache.avro.util.ClassUtils;
-import org.apache.avro.util.MapUtil;
 
 import java.io.IOException;
 import java.lang.annotation.Annotation;
@@ -839,7 +838,7 @@ public static Schema makeNullable(Schema schema) {
 
   // Return of this class and its superclasses to serialize.
   private static Field[] getCachedFields(Class<?> recordClass) {
-    return MapUtil.computeIfAbsent(FIELDS_CACHE, recordClass, rc -> getFields(rc, true));
+    return FIELDS_CACHE.computeIfAbsent(recordClass, rc -> getFields(rc, true));
   }
 
   private static Field[] getFields(Class<?> recordClass, boolean excludeJava) {
diff --git a/lang/java/avro/src/main/java/org/apache/avro/specific/SpecificData.java b/lang/java/avro/src/main/java/org/apache/avro/specific/SpecificData.java
index c30616e17a3..a9dbbcbb5b6 100644
--- a/lang/java/avro/src/main/java/org/apache/avro/specific/SpecificData.java
+++ b/lang/java/avro/src/main/java/org/apache/avro/specific/SpecificData.java
@@ -30,7 +30,6 @@
 import org.apache.avro.io.DecoderFactory;
 import org.apache.avro.io.EncoderFactory;
 import org.apache.avro.util.ClassUtils;
-import org.apache.avro.util.MapUtil;
 import org.apache.avro.util.SchemaUtil;
 import org.apache.avro.util.internal.ClassValueCache;
 
@@ -379,7 +378,7 @@ public Class getClass(Schema schema) {
       String name = schema.getFullName();
       if (name == null)
         return null;
-      Class<?> c = MapUtil.computeIfAbsent(classCache, name, n -> {
+      Class<?> c = classCache.computeIfAbsent(name, n -> {
         try {
           return ClassUtils.forName(getClassLoader(), getClassName(schema));
         } catch (ClassNotFoundException e) {
diff --git a/lang/java/avro/src/main/java/org/apache/avro/util/MapUtil.java b/lang/java/avro/src/main/java/org/apache/avro/util/MapUtil.java
index 1bdbfaf9a0a..394aa2b3a63 100644
--- a/lang/java/avro/src/main/java/org/apache/avro/util/MapUtil.java
+++ b/lang/java/avro/src/main/java/org/apache/avro/util/MapUtil.java
@@ -27,13 +27,14 @@ private MapUtil() {
   }
 
   /**
-   * A temporary workaround for Java 8 specific performance issue JDK-8161372
-   * .<br>
-   * This class should be removed once we drop Java 8 support.
+   * A temporary workaround for Java 8 specific performance issue JDK-8161372.
    *
    * @see <a href=
    *      "https://bugs.openjdk.java.net/browse/JDK-8161372">JDK-8161372</a>
+   * @deprecated As of JDK 1.9 this issue has been resolved.
    */
+  // TODO: Remove for 1.13.0 or later
+  @Deprecated
   public static <K, V> V computeIfAbsent(ConcurrentMap<K, V> map, K key, Function<K, V> mappingFunction) {
     V value = map.get(key);
     if (value != null) {