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.rule.strategy;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import com.aliyun.fastmodel.core.tree.AstVisitor;
  import com.aliyun.fastmodel.core.tree.Node;
  import com.aliyun.fastmodel.core.tree.expr.ArithmeticBinaryExpression;
  import com.aliyun.fastmodel.core.tree.expr.BaseExpression;
  import com.aliyun.fastmodel.core.tree.statement.rule.RuleStrategy;
  import com.aliyun.fastmodel.core.tree.statement.rule.function.BaseFunction;
  import com.aliyun.fastmodel.core.tree.statement.rule.function.VolFunction;
  import lombok.Getter;
  import lombok.ToString;
  
  /**
   * 波动率策略
   *
   * @author panguanjing
   * @date 2021/5/29
   */
  @Getter
  @ToString
  public class VolStrategy extends RuleStrategy {
      private final VolFunction volFunction;
  
      private final VolOperator volOperator;
  
      private final VolInterval volInterval;
  
      public VolStrategy(VolFunction volFunction,
                         VolOperator volOperator,
                         VolInterval volInterval) {
          this.volFunction = volFunction;
          this.volOperator = volOperator;
          this.volInterval = volInterval;
      }
  
      @Override
      public List<? extends Node> getChildren() {
          List<Node> list = new ArrayList<>();
          list.add(volFunction);
          list.add(volInterval);
          return list;
      }
  
      @Override
      public BaseExpression toExpression() {
          return new ArithmeticBinaryExpression(
              volOperator.getArithmeticOperator(),
              volFunction,
              volInterval
          );
      }
  
      @Override
      public BaseFunction getFunction() {
          return volFunction;
      }
  
      @Override
      public <R, C> R accept(AstVisitor<R, C> visitor, C context) {
          return visitor.visitVolStrategy(this, context);
      }
  }
  