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.api.mapper.annotations;
  
  import com.datastax.oss.driver.api.mapper.entity.saving.NullSavingStrategy;
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Annotates a {@link Dao} interface to define a default {@link NullSavingStrategy}, that will apply
   * to all methods that don't explicitly declare one.
   *
   * <p>For example, given this interface:
   *
   * <pre>
   * &#64;Dao
   * &#64;DefaultNullSavingStrategy(SET_TO_NULL)
   * public interface ProductDao {
   *
   *   &#64;Insert
   *   void insert(Product product);
   *
   *   &#64;Update(nullSavingStrategy = DO_NOT_SET)
   *   void update(Product product);
   * }
   * </pre>
   *
   * <ul>
   *   <li>{@code insert(Product)} will use {@link NullSavingStrategy#SET_TO_NULL SET_TO_NULL}
   *       (inherited from the DAO's default).
   *   <li>{@code update(Product)} will use {@link NullSavingStrategy#DO_NOT_SET DO_NOT_SET}.
   * </ul>
   *
   * If the DAO interface isn't annotated with {@link DefaultNullSavingStrategy}, any method that does
   * not declare its own value defaults to {@link NullSavingStrategy#DO_NOT_SET DO_NOT_SET}.
   *
   * <p>Note that null saving strategies are only relevant for {@link Update}, {@link Insert}, {@link
   * Query} and {@link SetEntity} methods.
   */
  @Target(ElementType.TYPE)
  @Retention(RetentionPolicy.RUNTIME)
  public @interface DefaultNullSavingStrategy {
    NullSavingStrategy value();
  }
  