content: /*
   * Copyright 2021-2022 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.aliyun.fastmodel.core.tree.statement.indicator;
  
  import com.aliyun.fastmodel.core.tree.AstVisitor;
  import com.aliyun.fastmodel.core.tree.datatype.BaseDataType;
  import com.aliyun.fastmodel.core.tree.expr.BaseExpression;
  import com.aliyun.fastmodel.core.tree.statement.BaseCreate;
  import com.aliyun.fastmodel.core.tree.statement.constants.IndicatorType;
  import com.aliyun.fastmodel.core.tree.statement.constants.StatementType;
  import com.aliyun.fastmodel.core.tree.statement.element.CreateElement;
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  
  /**
   * 创建指标的语句
   *
   * @author panguanjing
   * @date 2020/9/3
   */
  @Getter
  @EqualsAndHashCode(callSuper = false)
  public class CreateIndicator extends BaseCreate {
  
      /**
       * 指标类型，比如bigint等，只支持基本类型的指标
       */
      private final BaseDataType dataType;
      /**
       * 指标表达式
       */
      private final BaseExpression indicatorExpr;
  
      /**
       * 指标类型
       * {@link IndicatorType}
       */
      private final IndicatorType indicatorType;
  
      public CreateIndicator(CreateElement element, BaseDataType dataType,
                             BaseExpression indicatorExpr, IndicatorType indicatorType) {
          super(element);
          this.dataType = dataType;
          this.indicatorExpr = indicatorExpr;
          this.indicatorType = indicatorType;
          setStatementType(StatementType.INDICATOR);
      }
  
      @Override
      public <R, C> R accept(AstVisitor<R, C> visitor, C context) {
          return visitor.visitCreateIndicator(this, context);
      }
  }
  