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 FieldWriterInt64ValField<T>
          extends FieldWriterInt64<T> {
      FieldWriterInt64ValField(
              String name,
              int ordinal,
              long features,
              String format,
              String label,
              Field field
      ) {
          super(name, ordinal, features, format, label, 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 o) {
          long value = getFieldLong(o);
          if (value == 0L && jsonWriter.isEnabled(JSONWriter.Feature.NotWriteDefaultValue)) {
              return false;
          }
  
          writeInt64(jsonWriter, value);
          return true;
      }
  
      @Override
      public void writeValue(JSONWriter jsonWriter, T object) {
          long value = getFieldLong(object);
          jsonWriter.writeInt64(value);
      }
  }
  