content: package com.alibaba.fastjson.serializer;
  
  import com.alibaba.fastjson.parser.DefaultJSONParser;
  import com.alibaba.fastjson.parser.JSONToken;
  import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  import java.nio.ByteBuffer;
  
  public class ByteBufferCodec implements ObjectSerializer, ObjectDeserializer {
      public final static ByteBufferCodec instance = new ByteBufferCodec();
  
      @Override
      public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
          ByteBufferBean bean = parser.parseObject(ByteBufferBean.class);
          return (T) bean.byteBuffer();
      }
  
      @Override
      public int getFastMatchToken() {
          return JSONToken.LBRACKET;
      }
  
      @Override
      public void write(JSONSerializer serializer, Object object, Object fieldName, Type fieldType, int features) throws IOException {
          ByteBuffer byteBuf = (ByteBuffer) object;
  
          byte[] array = byteBuf.array();
  
          SerializeWriter out = serializer.out;
          out.write('{');
  
          out.writeFieldName("array");
          out.writeByteArray(array);
          out.writeFieldValue(',', "limit", byteBuf.limit());
          out.writeFieldValue(',', "position", byteBuf.position());
  
          out.write('}');
      }
  
      public static class ByteBufferBean {
          public byte[] array;
          public int limit;
          public int position;
  
          public ByteBuffer byteBuffer() {
              ByteBuffer buf = ByteBuffer.wrap(array);
              buf.limit(limit);
              buf.position(position);
              return buf;
          }
      }
  }
  