content: package com.alibaba.fastjson2.writer;
  
  import com.alibaba.fastjson2.JSONException;
  import com.alibaba.fastjson2.JSONWriter;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  final class FieldWriterEnumMethod
          extends FieldWriterEnum {
      FieldWriterEnumMethod(
              String name,
              int ordinal,
              long features,
              String format,
              String label,
              Class fieldType,
              Field field,
              Method method
      ) {
          super(name, ordinal, features, format, label, fieldType, fieldType, field, method);
      }
  
      @Override
      public Object getFieldValue(Object object) {
          try {
              return method.invoke(object);
          } catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
              throw new JSONException("invoke getter method error, " + fieldName, e);
          }
      }
  
      @Override
      public boolean write(JSONWriter jsonWriter, Object object) {
          Enum value = (Enum) getFieldValue(object);
  
          if (value == null) {
              long features = this.features | jsonWriter.getFeatures();
              if ((features & JSONWriter.Feature.WriteNulls.mask) != 0) {
                  writeFieldName(jsonWriter);
                  jsonWriter.writeNull();
                  return true;
              } else {
                  return false;
              }
          }
  
          writeEnum(jsonWriter, value);
          return true;
      }
  }
  