fix: decode classEnum error

src/main/java/com/caucho/hessian/io/EnumDeserializer.java

@@ -60,8 +60,15 @@ public class EnumDeserializer extends AbstractDeserializer {
 
     public EnumDeserializer(Class cl)
     {
-        try {
+        // hessian/33b[34], hessian/3bb[78]
+        if (cl.isEnum())
             _enumType = cl;
+        else if (cl.getSuperclass().isEnum())
+            _enumType = cl.getSuperclass();
+        else
+            throw new RuntimeException("Class " + cl.getName() + " is not an enum");
+
+        try {
             _valueOf = cl.getMethod("valueOf",
                 new Class[] { Class.class, String.class });
         } catch (Exception e) {

src/main/java/com/caucho/hessian/io/EnumSerializer.java

@@ -59,6 +59,10 @@ public class EnumSerializer extends AbstractSerializer {
 
     public EnumSerializer(Class cl)
     {
+        // hessian/32b[12], hessian/3ab[23]
+        if (!cl.isEnum() && cl.getSuperclass().isEnum())
+            cl = cl.getSuperclass();
+
         try {
             _name = cl.getMethod("name", new Class[0]);
         } catch (Exception e) {
@@ -74,6 +78,9 @@ public void writeObject(Object obj, AbstractHessianOutput out)
 
         Class cl = obj.getClass();
 
+        if (!cl.isEnum() && cl.getSuperclass().isEnum())
+            cl = cl.getSuperclass();
+
         String name = null;
         try {
             name = (String) _name.invoke(obj, (Object[]) null);

src/test/java/com/alipay/hessian/generic/special/SpecialClassTest.java

@@ -25,6 +25,7 @@
 import com.caucho.hessian.io.Hessian2Input;
 import com.caucho.hessian.io.Hessian2Output;
 import com.caucho.hessian.io.SerializerFactory;
+import com.caucho.hessian.test.ClassEnum;
 import com.caucho.hessian.test.Color;
 import org.junit.Test;
 
@@ -264,6 +265,47 @@ public void testEnum() throws Exception {
         assertTrue(o == Color.BLANK);
     }
 
+    /**
+     * 检测ClassEnum的序列化情况
+     * @throws Exception
+     */
+    @Test
+    public void testClassEnum() throws IOException {
+        ClassEnum classEnum = ClassEnum.A;
+
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+        Hessian2Output hout = new Hessian2Output(bout);
+        hout.setSerializerFactory(new SerializerFactory());
+        hout.writeObject(classEnum);
+        hout.close();
+
+        byte[] body = bout.toByteArray();
+        ByteArrayInputStream bin = new ByteArrayInputStream(body, 0, body.length);
+        Hessian2Input hin = new Hessian2Input(bin);
+        hin.setSerializerFactory(new GenericSerializerFactory());
+
+        Object o = hin.readObject();
+        assertEquals(GenericObject.class, o.getClass());
+        Object obj = GenericUtils.convertToObject(o);
+        assertEquals(obj.getClass(), ClassEnum.A.getClass());
+        assertTrue(obj == ClassEnum.A);
+
+        GenericObject col = GenericUtils.convertToGenericObject(obj);
+        bout = new ByteArrayOutputStream();
+        hout = new Hessian2Output(bout);
+        hout.setSerializerFactory(new GenericSerializerFactory());
+        hout.writeObject(col);
+        hout.close();
+
+        body = bout.toByteArray();
+        bin = new ByteArrayInputStream(body, 0, body.length);
+        hin = new Hessian2Input(bin);
+        hin.setSerializerFactory(new SerializerFactory());
+        o = hin.readObject();
+        assertEquals(o.getClass(), ClassEnum.A.getClass());
+        assertTrue(o == ClassEnum.A);
+    }
+
     /**
      * 检测Calendar的序列化情况
      * @throws Exception

src/test/java/com/caucho/hessian/test/ClassEnum.java

@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.caucho.hessian.test;
+
+/**
+ * @author lianglipeng.llp@alibaba-inc.com
+ * @version $Id: ClassEnum.java, v 0.1 2025年05月29日 15:46 立蓬 Exp $
+ */
+public enum ClassEnum {
+    A {
+        @Override
+        public void test() {
+            System.out.println("A");
+        }
+    },
+    B {
+        @Override
+        public void test() {
+            System.out.println("B");
+        }
+    };
+    public abstract void test();
+}