/*
    *    Copyright 2016-2026 the original author or authors.
    *
    *    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
    *
    *       https://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.mybatis.dynamic.sql.update;
  
  import java.util.Objects;
  import java.util.function.Function;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.SqlTable;
  import org.mybatis.dynamic.sql.dsl.AbstractUpdateDSL;
  
  public class UpdateDSL<R> extends AbstractUpdateDSL<R, UpdateDSL<R>> {
  
      private final Function<UpdateModel, R> adapterFunction;
  
      private UpdateDSL(SqlTable table, @Nullable String tableAlias, Function<UpdateModel, R> adapterFunction) {
          super(table, tableAlias);
          this.adapterFunction = Objects.requireNonNull(adapterFunction);
      }
  
      /**
       * WARNING! Calling this method could result in an update statement that updates
       * all rows in a table.
       *
       * @return the update model
       */
      @Override
      public R build() {
          return buildUpdateModel().map(adapterFunction);
      }
  
      @Override
      protected UpdateDSL<R> getThis() {
          return this;
      }
  
      public static <R> UpdateDSL<R> update(Function<UpdateModel, R> adapterFunction, SqlTable table,
                                            @Nullable String tableAlias) {
          return new UpdateDSL<>(table, tableAlias, adapterFunction);
      }
  
      public static UpdateDSL<UpdateModel> update(SqlTable table) {
          return update(Function.identity(), table, null);
      }
  
      public static UpdateDSL<UpdateModel> update(SqlTable table, String tableAlias) {
          return update(Function.identity(), table, tableAlias);
      }
  }