code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  package org.apache.skywalking.oap.server.core.storage.type;
  
  import org.apache.skywalking.oap.server.core.storage.StorageData;
  
  /**
   * Converter between the give T and K.
   *
   * @param <T> A storage entity implementation.
   */
  public interface StorageBuilder<T extends StorageData> {
      /**
       * Use the given converter to build an OAP entity object.
       *
       * @param converter to transfer data format
       * @return an OAP entity object
       */
      T storage2Entity(Convert2Entity converter);
  
      /**
       * Use the given converter to build a database preferred structure.
       *
       * @param entity    to be used
       * @param converter provides the converting logic and hosts the converted value. Use {@link
       *                  Convert2Storage#obtain()} to read the converted data.
       */
      void entity2Storage(T entity, Convert2Storage converter);
  }
  