/*
    *    Copyright 2016-2025 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.select;
  
  import java.util.Objects;
  import java.util.Optional;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.common.OrderByModel;
  import org.mybatis.dynamic.sql.configuration.StatementConfiguration;
  
  public abstract class AbstractSelectModel {
      private final @Nullable OrderByModel orderByModel;
      private final @Nullable PagingModel pagingModel;
      protected final StatementConfiguration statementConfiguration;
  
      protected AbstractSelectModel(AbstractBuilder<?> builder) {
          orderByModel = builder.orderByModel;
          pagingModel = builder.pagingModel;
          statementConfiguration = Objects.requireNonNull(builder.statementConfiguration);
      }
  
      public Optional<OrderByModel> orderByModel() {
          return Optional.ofNullable(orderByModel);
      }
  
      public Optional<PagingModel> pagingModel() {
          return Optional.ofNullable(pagingModel);
      }
  
      public StatementConfiguration statementConfiguration() {
          return statementConfiguration;
      }
  
      public abstract static class AbstractBuilder<T extends AbstractBuilder<T>> {
          private @Nullable OrderByModel orderByModel;
          private @Nullable PagingModel pagingModel;
          private @Nullable StatementConfiguration statementConfiguration;
  
          public T withOrderByModel(@Nullable OrderByModel orderByModel) {
              this.orderByModel = orderByModel;
              return getThis();
          }
  
          public T withPagingModel(@Nullable PagingModel pagingModel) {
              this.pagingModel = pagingModel;
              return getThis();
          }
  
          public T withStatementConfiguration(StatementConfiguration statementConfiguration) {
              this.statementConfiguration = statementConfiguration;
              return getThis();
          }
  
          protected abstract T getThis();
      }
  }