content: /*
   * Copyright (c) 2024, Alibaba Cloud;
   * Licensed 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.aliyun.dataworks.client.utils.spark.command;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.ObjectInputStream;
  import java.io.ObjectStreamClass;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * An object input stream that only allows classes used by the launcher protocol to be in the serialized stream. See
   * SPARK-20922.
   */
  class FilteredObjectInputStream extends ObjectInputStream {
  
      private static final List<String> ALLOWED_PACKAGES = Arrays.asList(
          "org.apache.spark.launcher.",
          "java.lang.");
  
      FilteredObjectInputStream(InputStream is) throws IOException {
          super(is);
      }
  
      @Override
      protected Class<?> resolveClass(ObjectStreamClass desc)
          throws IOException, ClassNotFoundException {
  
          boolean isValid = ALLOWED_PACKAGES.stream().anyMatch(p -> desc.getName().startsWith(p));
          if (!isValid) {
              throw new IllegalArgumentException(
                  String.format("Unexpected class in stream: %s", desc.getName()));
          }
          return super.resolveClass(desc);
      }
  
  }
  