content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONException;
  import com.alibaba.fastjson2.JSONWriter;
  
  import java.lang.reflect.Field;
  
  import static com.alibaba.fastjson2.util.JDKUtils.UNSAFE;
  
  final class FieldWriterMillisField<T>
          extends FieldWriterDate<T> {
      FieldWriterMillisField(String fieldName,
              int ordinal,
              long features,
              String dateTimeFormat,
              String label,
              Field field
      ) {
          super(fieldName, ordinal, features, dateTimeFormat, label, long.class, long.class, field, null);
      }
  
      @Override
      public Object getFieldValue(T object) {
          return getFieldLong(object);
      }
  
      public long getFieldLong(T object) {
          if (object == null) {
              throw new JSONException("field.get error, " + fieldName);
          }
  
          try {
              long value;
              if (fieldOffset != -1) {
                  value = UNSAFE.getLong(object, fieldOffset);
              } else {
                  value = field.getLong(object);
              }
              return value;
          } catch (IllegalArgumentException | IllegalAccessException e) {
              throw new JSONException("field.get error, " + fieldName, e);
          }
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, T object) {
          long millis = getFieldLong(object);
          writeDate(jsonWriter, millis);
          return true;
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, T object) {
          long millis = getFieldLong(object);
          writeDate(jsonWriter, false, millis);
      }
  }
  