/*
    *    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 org.mybatis.dynamic.sql.SortSpecification;
  import org.mybatis.dynamic.sql.render.RenderingContext;
  import org.mybatis.dynamic.sql.util.FragmentAndParameters;
  
  /**
   * This class is used for an order by phrase where there is no suitable column name
   * to use (for example a calculated column or an aggregate column).
   *
   * @author Jeff Butler
   */
  public class SimpleSortSpecification implements SortSpecification {
  
      private final String name;
      private final String descendingPhrase;
  
      private SimpleSortSpecification(String name) {
          this(name, ""); //$NON-NLS-1$
      }
  
      private SimpleSortSpecification(String name, String descendingPhrase) {
          this.name = Objects.requireNonNull(name);
          this.descendingPhrase = descendingPhrase;
      }
  
      @Override
      public SortSpecification descending() {
          return new SimpleSortSpecification(name, " DESC"); //$NON-NLS-1$
      }
  
      @Override
      public FragmentAndParameters renderForOrderBy(RenderingContext renderingContext) {
          return FragmentAndParameters.fromFragment(name + descendingPhrase);
      }
  
      public static SimpleSortSpecification of(String name) {
          return new SimpleSortSpecification(name);
      }
  }