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.strfunc;
  
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.ItemFunc;
  
  import java.util.List;
  
  
  public class ItemFuncMakeSet extends ItemStrFunc {
  
      public ItemFuncMakeSet(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "make_set";
      }
  
      @Override
      public String valStr() {
          int bits = args.get(0).valInt().intValue();
          int nums = 1;
          StringBuilder sb = new StringBuilder();
          while (bits > 0 && nums < args.size()) {
              if (bits % 2 != 0) {
                  String var = args.get(nums).valStr();
                  if (var != null) {
                      if (sb.length() > 0) {
                          sb.append(",");
                      }
                      sb.append(var);
                  }
              }
              bits = bits / 2;
              nums++;
          }
          return sb.toString();
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncMakeSet(realArgs, charsetIndex);
      }
  }
  