content: package act.db;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * Licensed 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.
   * #L%
   */
  
  import act.data.Timestamped;
  import org.osgl.$;
  
  /**
   * The model with time tracking built-in
   * @param <TIMESTANP_TYPE> the time type
   */
  public interface TimeTrackingModel<TIMESTANP_TYPE, TIMESTAMP_TYPE_RESOLVER extends $.Function<TIMESTANP_TYPE, Long>>
  extends Timestamped {
      /**
       * Returns the first time this model is created and saved
       * @return the create time
       */
      TIMESTANP_TYPE _created();
  
      /**
       * Set the created timestamp.
       * <p>Note not to be used by application</p>
       * @param timestamp the timestamp
       */
      void _created(TIMESTANP_TYPE timestamp);
  
      /**
       * Returns the last time this model has been updated and saved
       * @return the last modified time
       */
      TIMESTANP_TYPE _lastModified();
  
      /**
       * Set the last modified timestamp
       * <p>Note not to be used by application</p>
       * @param timestamp the timestamp
       */
      void _lastModified(TIMESTANP_TYPE timestamp);
  
      /**
       * Returns the class represents the timestamp type used to track
       * the model creation/updating events
       * @return the class of the time type
       */
      Class<TIMESTANP_TYPE> _timestampType();
  
      /**
       * Returns the instance that can resolve the timestamp type into long
       * @return the timestamp resolver
       */
      TIMESTAMP_TYPE_RESOLVER _timestampTypeResolver();
  }
  