content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * 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
   *
   *      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.alibaba.druid.sql.ast;
  
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  public final class SQLKeep extends SQLObjectImpl {
      protected DenseRank denseRank;
  
      protected SQLOrderBy orderBy;
  
      @Override
      protected void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              acceptChild(visitor, this.orderBy);
          }
          visitor.endVisit(this);
      }
  
      public DenseRank getDenseRank() {
          return denseRank;
      }
  
      public void setDenseRank(DenseRank denseRank) {
          this.denseRank = denseRank;
      }
  
      public SQLOrderBy getOrderBy() {
          return orderBy;
      }
  
      public void setOrderBy(SQLOrderBy orderBy) {
          if (orderBy != null) {
              orderBy.setParent(this);
          }
          this.orderBy = orderBy;
      }
  
      public SQLKeep clone() {
          SQLKeep x = new SQLKeep();
  
          x.denseRank = denseRank;
  
          if (orderBy != null) {
              x.setOrderBy(orderBy.clone());
          }
  
          return x;
      }
  
      public static enum DenseRank {
          FIRST,
          LAST
      }
  }
  