content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  package com.actiontech.dble.plan.common.item.function.timefunc;
  
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.ItemFunc;
  import com.actiontech.dble.plan.common.item.function.strfunc.ItemStrFunc;
  import com.actiontech.dble.plan.common.time.MySQLTime;
  import com.actiontech.dble.plan.common.time.MyTime;
  
  import java.util.List;
  
  
  public class ItemFuncDayname extends ItemStrFunc {
  
      public ItemFuncDayname(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "dayname";
      }
  
      @Override
      public String valStr() {
          MySQLTime ltime = new MySQLTime();
          if (getArg0Date(ltime, MyTime.TIME_NO_ZERO_DATE))
              return null;
  
          long weekday = MyTime.calcWeekday(MyTime.calcDaynr(ltime.getYear(), ltime.getMonth(), ltime.getDay()), false);
          return MyTime.DAY_NAMES[(int) weekday];
      }
  
      @Override
      public void fixLengthAndDec() {
          maxLength = 9;
          decimals = 0;
          maybeNull = true;
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncDayname(realArgs, charsetIndex);
      }
  
  }
  