/*
    * 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 org.apache.shardingsphere.sql.parser.sql.common.segment.dml.order.item;
  
  import lombok.Getter;
  import org.apache.shardingsphere.infra.database.core.metadata.database.enums.NullsOrderType;
  import org.apache.shardingsphere.sql.parser.sql.common.enums.OrderDirection;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment;
  
  /**
   * Order by item segment for expression.
   */
  @Getter
  public final class ExpressionOrderByItemSegment extends TextOrderByItemSegment {
      
      private final String expression;
      
      private final ExpressionSegment expr;
      
      public ExpressionOrderByItemSegment(final int startIndex, final int stopIndex, final String expression, final OrderDirection orderDirection, final NullsOrderType nullsOrderType) {
          super(startIndex, stopIndex, orderDirection, nullsOrderType);
          this.expression = expression;
          expr = null;
      }
      
      public ExpressionOrderByItemSegment(final int startIndex, final int stopIndex, final String expression, final OrderDirection orderDirection, final NullsOrderType nullsOrderType,
                                          final ExpressionSegment expr) {
          super(startIndex, stopIndex, orderDirection, nullsOrderType);
          this.expression = expression;
          this.expr = expr;
      }
      
      @Override
      public String getText() {
          return expression;
      }
  }