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 com.actiontech.dble.plan.common.item.function.primary.ItemIntFunc;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncFindInSet extends ItemIntFunc {
  
      public ItemFuncFindInSet(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "find_in_set";
      }
  
      @Override
      public BigInteger valInt() {
          long index = 0;
          String s = args.get(0).valStr();
          String source = args.get(1).valStr();
          if (args.get(0).isNull() || args.get(1).isNull()) {
              this.nullValue = true;
              return BigInteger.ZERO;
          }
          if (source.isEmpty())
              return BigInteger.ZERO;
          String[] ss = source.split(",");
          for (int i = 0; i < ss.length; ++i) {
              if (ss[i].equals(s)) {
                  index = i + 1;
                  break;
              }
          }
          return BigInteger.valueOf(index);
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncFindInSet(realArgs, charsetIndex);
      }
  }
  