add forward/backward compatible serialization support

java/fury-core/src/main/java/io/fury/exception/ClassNotCompatibleException.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2023 The Fury authors
+ * 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 io.fury.exception;
+
+import io.fury.serializer.CompatibleMode;
+
+/**
+ * Exception for class compatibility. If {@link CompatibleMode#COMPATIBLE} is not enabled, and the
+ * class when serializing is different from deserialization, for example, the class add/delete some
+ * fields, this exception will be thrown.
+ *
+ * @author chaokunyang
+ */
+public class ClassNotCompatibleException extends FuryException {
+  public ClassNotCompatibleException(String message) {
+    super(message);
+  }
+
+  public ClassNotCompatibleException(String message, Throwable cause) {
+    super(message, cause);
+  }
+}

java/fury-core/src/main/java/io/fury/resolver/ClassResolver.java

@@ -186,6 +186,7 @@ private static class ExtRegistry {
     // avoid potential recursive call for seq codec generation.
     // ex. A->field1: B, B.field1: A
     private final Set<Class<?>> getClassCtx = new HashSet<>();
+    private final Map<Class<?>, FieldResolver> fieldResolverMap = new HashMap<>();
     // TODO(chaokunyang) Better to  use soft reference, see ObjectStreamClass.
     private final ConcurrentHashMap<Tuple2<Class<?>, Boolean>, SortedMap<Field, Descriptor>>
         descriptorsCache = new ConcurrentHashMap<>();
@@ -651,6 +652,18 @@ public Class<? extends Serializer> getJavaSerializer(Class<?> clz) {
     return JavaSerializer.class;
   }
 
+  public FieldResolver getFieldResolver(Class<?> cls) {
+    // can't use computeIfAbsent, since there may be recursive muiltple
+    // `getFieldResolver` thus multiple updates, which cause concurrent
+    // modification exeption.
+    FieldResolver fieldResolver = extRegistry.fieldResolverMap.get(cls);
+    if (fieldResolver == null) {
+      fieldResolver = FieldResolver.of(fury, cls);
+      extRegistry.fieldResolverMap.put(cls, fieldResolver);
+    }
+    return fieldResolver;
+  }
+
   // thread safe
   public SortedMap<Field, Descriptor> getAllDescriptorsMap(Class<?> clz, boolean searchParent) {
     // when jit thread query this, it is already built by serialization main thread.