bug fix for issue #2851

alibaba · Aug 8, 2024 · 05edc92 · 05edc92
1 parent a2ecc31
commit 05edc92
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diff --git a/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderImplList.java b/core/src/main/java/com/alibaba/fastjson2/reader/ObjectReaderImplList.java
@@ -174,6 +174,9 @@ public static ObjectReader of(Type type, Class listClass, long features) {
                     instanceClass = TreeSet.class;
                     builder = (Function<NavigableSet, NavigableSet>) Collections::synchronizedNavigableSet;
                     break;
+                case "java.util.AbstractList$RandomAccessSubList":
+                    instanceClass = ArrayList.class;
+                    break;
                 default:
                     instanceClass = listClass;
             }

diff --git a/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2851.java b/core/src/test/java/com/alibaba/fastjson2/issues_2800/Issue2851.java
@@ -0,0 +1,22 @@
+package com.alibaba.fastjson2.issues_2800;
+
+import com.alibaba.fastjson2.*;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class Issue2851 {
+    @Test
+    public void test() {
+        List<String> list = Arrays.asList("").subList(0, 1);
+        byte[] bytes = JSONB.toBytes(list, JSONWriter.Feature.WriteClassName);
+        JSONReader.AutoTypeBeforeHandler autoTypeFilter = JSONReader.autoTypeFilter("java.util.AbstractList");
+        JSONReader.Context context = JSONFactory.createReadContext();
+        context.config(autoTypeFilter);
+        List<String> parsed = (List<String>) JSONB.parse(bytes, context);
+        assertEquals(list.get(0), parsed.get(0));
+    }
+}