From cd66e18114a70b06cdc8b3e39eaf6813de61fe61 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AB=98=E9=93=81?= <shaojin.wensj@alibaba-inc.com>
Date: Sun, 11 Aug 2024 02:23:06 +0800
Subject: [PATCH] bug fix deserialize EnumMap, for issue #2859

---
 .../reader/ObjectReaderProvider.java          |  4 ++++
 .../fastjson2/issues_2800/Issue2859.java      | 21 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderProvider.java b/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderProvider.java
index 27a85236d8..29f44bb181 100644
--- a/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderProvider.java
+++ b/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderProvider.java
@@ -824,6 +824,10 @@ private ObjectReader getObjectReaderInternal(Type objectType, boolean fieldBased
                 if (typeArguments.length == 1 && ArrayList.class.isAssignableFrom(rawClass)) {
                     return ObjectReaderImplList.of(objectType, rawClass, 0);
                 }
+
+                if (typeArguments.length == 2 && Map.class.isAssignableFrom(rawClass)) {
+                    return ObjectReaderImplMap.of(objectType, (Class) rawType, 0);
+                }
             }
         }
 
diff --git a/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2859.java b/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2859.java
index d6fcdec996..29209c87c9 100644
--- a/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2859.java
+++ b/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2859.java
@@ -1,11 +1,17 @@
 package com.alibaba.fastjson2.issues_2800;
 
 import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.TypeReference;
 import org.junit.jupiter.api.Test;
 
+import java.lang.reflect.Type;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
@@ -51,4 +57,19 @@ public void test1() {
     static class Bean1 {
         public LocalDate date;
     }
+
+    @Test
+    public void testEnumMap() {
+        Map<ApplicationType, List<Bean>> map = new EnumMap<>(ApplicationType.class);
+        map.put(ApplicationType.AI, new ArrayList<>());
+        String str = JSON.toJSONString(map);
+        System.out.println(str);
+        Type type = new TypeReference<EnumMap<ApplicationType, List<Bean>>>() {}.getType();
+        Map<ApplicationType, List<Bean>> parsed = JSON.parseObject(str, type);
+        assertEquals(map.get(ApplicationType.AI), parsed.get(ApplicationType.AI));
+    }
+
+    public enum ApplicationType {
+        AI, Normal
+    }
 }