content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONB;
  import com.alibaba.fastjson2.JSONException;
  import com.alibaba.fastjson2.JSONWriter;
  import com.alibaba.fastjson2.util.Fnv;
  import com.alibaba.fastjson2.util.IOUtils;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.lang.reflect.Type;
  import java.util.function.Function;
  import java.util.zip.GZIPOutputStream;
  
  import static com.alibaba.fastjson2.JSONWriter.Feature.WriteByteArrayAsBase64;
  
  final class ObjectWriterImplInt8ValueArray
          extends ObjectWriterPrimitiveImpl {
      static final ObjectWriterImplInt8ValueArray INSTANCE = new ObjectWriterImplInt8ValueArray(null);
      static final byte[] JSONB_TYPE_NAME_BYTES = JSONB.toBytes("[B");
      static final long JSONB_TYPE_HASH = Fnv.hashCode64("[B");
  
      private final Function<Object, byte[]> function;
  
      public ObjectWriterImplInt8ValueArray(Function<Object, byte[]> function) {
          this.function = function;
      }
  
      @Override
      public void writeJSONB(JSONWriter jsonWriter, Object object, Object fieldName, Type fieldType, long features) {
          if (jsonWriter.isWriteTypeInfo(object, fieldType)) {
              if (object == byte[].class) {
                  jsonWriter.writeTypeName(JSONB_TYPE_NAME_BYTES, JSONB_TYPE_HASH);
              } else {
                  jsonWriter.writeTypeName(object.getClass().getName());
              }
          }
  
          byte[] bytes;
          if (function != null && object != null) {
              bytes = function.apply(object);
          } else {
              bytes = (byte[]) object;
          }
  
          jsonWriter.writeBinary(bytes);
      }
  
      @Override
      public void write(JSONWriter jsonWriter, Object object, Object fieldName, Type fieldType, long features) {
          if (object == null) {
              jsonWriter.writeArrayNull();
              return;
          }
  
          byte[] bytes;
          if (function != null) {
              bytes = function.apply(object);
          } else {
              bytes = (byte[]) object;
          }
  
          String format = jsonWriter.context.getDateFormat();
          if ("millis".equals(format)) {
              format = null;
          }
  
          if ("gzip".equals(format) || "gzip,base64".equals(format)) {
              GZIPOutputStream gzipOut = null;
              try {
                  ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
                  if (bytes.length < 512) {
                      gzipOut = new GZIPOutputStream(byteOut, bytes.length);
                  } else {
                      gzipOut = new GZIPOutputStream(byteOut);
                  }
                  gzipOut.write(bytes);
                  gzipOut.finish();
                  bytes = byteOut.toByteArray();
              } catch (IOException ex) {
                  throw new JSONException("write gzipBytes error", ex);
              } finally {
                  IOUtils.close(gzipOut);
              }
          }
  
          if ("base64".equals(format)
                  || "gzip,base64".equals(format)
                  || (jsonWriter.getFeatures(features) & WriteByteArrayAsBase64.mask) != 0
          ) {
              jsonWriter.writeBase64(bytes);
              return;
          }
  
          jsonWriter.writeInt8(bytes);
      }
  }
  