content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.consistency.serialize;
  
  import com.alibaba.nacos.api.exception.runtime.NacosDeserializationException;
  import com.alibaba.nacos.common.utils.ByteUtils;
  import com.alibaba.nacos.consistency.Serializer;
  import com.caucho.hessian.io.Hessian2Input;
  import com.caucho.hessian.io.Hessian2Output;
  import com.caucho.hessian.io.SerializerFactory;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.lang.reflect.Type;
  
  /**
   * Serializer implement by hessian.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  @SuppressWarnings("all")
  public class HessianSerializer implements Serializer {
      
      private static final String NAME = "Hessian";
      
      private SerializerFactory serializerFactory = new NacosHessianSerializerFactory();
      
      public HessianSerializer() {
      }
      
      @Override
      public <T> T deserialize(byte[] data) {
          return deseiralize0(data);
      }
      
      @Override
      public <T> T deserialize(byte[] data, Class<T> cls) {
          T result = deserialize(data);
          if (result == null) {
              return null;
          }
          if (cls.isAssignableFrom(result.getClass())) {
              return result;
          }
          throw new NacosDeserializationException(cls, new ClassCastException(
                  "%s cannot be cast to %s".format(result.getClass().getCanonicalName(), cls.getCanonicalName())));
      }
      
      @Override
      public <T> T deserialize(byte[] data, Type type) {
          return deserialize(data);
      }
      
      private <T> T deseiralize0(byte[] data) {
          if (ByteUtils.isEmpty(data)) {
              return null;
          }
          
          Hessian2Input input = new Hessian2Input(new ByteArrayInputStream(data));
          input.setSerializerFactory(serializerFactory);
          Object resultObject;
          try {
              resultObject = input.readObject();
              input.close();
          } catch (IOException e) {
              throw new RuntimeException("IOException occurred when Hessian serializer decode!", e);
          }
          return (T) resultObject;
      }
      
      @Override
      public <T> byte[] serialize(T obj) {
          ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
          Hessian2Output output = new Hessian2Output(byteArray);
          output.setSerializerFactory(serializerFactory);
          try {
              output.writeObject(obj);
              output.close();
          } catch (IOException e) {
              throw new RuntimeException("IOException occurred when Hessian serializer encode!", e);
          }
          
          return byteArray.toByteArray();
      }
      
      @Override
      public String name() {
          return NAME;
      }
      
  }
  