content: /*
   * 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 com.datastax.oss.driver.examples.mapper.killrvideo.video;
  
  import com.datastax.oss.driver.api.core.PagingIterable;
  import com.datastax.oss.driver.api.mapper.annotations.Dao;
  import com.datastax.oss.driver.api.mapper.annotations.QueryProvider;
  import com.datastax.oss.driver.api.mapper.annotations.Select;
  import com.datastax.oss.driver.api.mapper.annotations.Update;
  import com.datastax.oss.driver.api.mapper.entity.saving.NullSavingStrategy;
  import java.util.UUID;
  
  @Dao
  public interface VideoDao {
  
    /** Simple selection by full primary key. */
    @Select
    Video get(UUID videoid);
  
    /**
     * Selection by partial primary key, this will return multiple rows.
     *
     * <p>Also, note that this queries a different table: DAOs are not limited to a single entity, the
     * return type of the method dictates what rows will be mapped to.
     */
    @Select
    PagingIterable<UserVideo> getByUser(UUID userid);
  
    /** Other selection by partial primary key, for another table. */
    @Select
    PagingIterable<LatestVideo> getLatest(String yyyymmdd);
  
    /** Other selection by partial primary key, for yet another table. */
    @Select
    PagingIterable<VideoByTag> getByTag(String tag);
  
    /**
     * Creating a video is a bit more complex: because of denormalization, it involves multiple
     * tables.
     *
     * <p>A query provider is a nice way to wrap all the queries in a single operation, and hide the
     * details from the DAO interface.
     */
    @QueryProvider(
        providerClass = CreateVideoQueryProvider.class,
        entityHelpers = {Video.class, UserVideo.class, LatestVideo.class, VideoByTag.class})
    void create(Video video);
  
    /**
     * Update using a template: the template must have its full primary key set; beyond that, any
     * non-null field will be considered as a value to SET on the target row.
     *
     * <p>Note that we specify the null saving strategy for emphasis, but this is the default.
     */
    @Update(nullSavingStrategy = NullSavingStrategy.DO_NOT_SET)
    void update(Video template);
  }
  