/*
    *    Copyright 2015-2023 the original author or authors.
    *
    *    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
    *
    *       https://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 org.mybatis.caches.redis;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  
  import org.apache.ibatis.cache.CacheException;
  
  public enum JDKSerializer implements Serializer {
    // Enum singleton, which is preferred approach since Java 1.5
    INSTANCE;
  
    private JDKSerializer() {
      // prevent instantiation
    }
  
    @Override
    public byte[] serialize(Object object) {
      try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
          ObjectOutputStream oos = new ObjectOutputStream(baos)) {
        oos.writeObject(object);
        return baos.toByteArray();
      } catch (Exception e) {
        throw new CacheException(e);
      }
    }
  
    @Override
    public Object unserialize(byte[] bytes) {
      if (bytes == null) {
        return null;
      }
      try (ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
          ObjectInputStream ois = new ObjectInputStream(bais)) {
        return ois.readObject();
      } catch (Exception e) {
        throw new CacheException(e);
      }
    }
  
  }