code: /*
   * 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.skywalking.oal.rt.parser;
  
  import java.util.LinkedList;
  import java.util.List;
  import lombok.Getter;
  import lombok.Setter;
  
  @Setter
  @Getter
  public class AggregationFuncStmt {
      private String aggregationFunctionName;
  
      private List<ConditionExpression> funcConditionExpressions;
  
      private int funcConditionExpressionGetIdx = 0;
  
      private List<Argument> funcArgs;
  
      private int argGetIdx = 0;
  
      private String nextArgCast = null;
  
      public void addFuncConditionExpression(ConditionExpression conditionExpression) {
          if (funcConditionExpressions == null) {
              funcConditionExpressions = new LinkedList<>();
          }
          funcConditionExpressions.add(conditionExpression);
      }
  
      public ConditionExpression getNextFuncConditionExpression() {
          return funcConditionExpressions.get(funcConditionExpressionGetIdx++);
      }
  
      public void addFuncArg(Argument argument) {
          if (funcArgs == null) {
              funcArgs = new LinkedList<>();
          }
          if (nextArgCast != null) {
              argument.setCastType(nextArgCast);
              nextArgCast = null;
          }
          funcArgs.add(argument);
      }
  
      public Argument getLastArgument() {
          return funcArgs.get(funcArgs.size() - 1);
      }
  
      public Argument getNextFuncArg() {
          return funcArgs.get(argGetIdx++);
      }
  }
  