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.bitfunc;
  
  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.primary.ItemIntFunc;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  /**
   * parameter is any type <br>
   * return BIG INT
   *
   * @author Administrator
   */
  public class ItemFuncBitCount extends ItemIntFunc {
  
      public ItemFuncBitCount(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "bit_count";
      }
  
      @Override
      public BigInteger valInt() {
          BigInteger value = args.get(0).valInt();
          if ((nullValue = args.get(0).isNullValue()))
              return BigInteger.ZERO; /* purecov: inspected */
          return BigInteger.valueOf(value.bitCount());
      }
  
      @Override
      public void fixLengthAndDec() {
          maxLength = 2;
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncBitCount(realArgs, charsetIndex);
      }
  }
  