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.operator.logic;
  
  import com.actiontech.dble.plan.common.field.Field;
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.operator.ItemBoolFunc2;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOperator;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncXor extends ItemBoolFunc2 {
  
      public ItemFuncXor(Item a, Item b, int charsetIndex) {
          super(a, b, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "xor";
      }
  
      @Override
      public Functype functype() {
          return Functype.XOR_FUNC;
      }
  
      @Override
      public BigInteger valInt() {
          int result = 0;
          nullValue = false;
          for (int i = 0; i < getArgCount(); i++) {
              result ^= (args.get(i).valInt().compareTo(BigInteger.ZERO) != 0) ? 1 : 0;
              if (args.get(i).isNullValue()) {
                  nullValue = true;
                  return BigInteger.ZERO;
              }
          }
          return BigInteger.valueOf(result);
      }
  
      @Override
      public SQLExpr toExpression() {
          SQLExpr left = args.get(0).toExpression();
          SQLExpr right = args.get(1).toExpression();
          return new SQLBinaryOpExpr(left, SQLBinaryOperator.BooleanXor, right);
      }
  
      @Override
      protected Item cloneStruct(boolean forCalculate, List<Item> calArgs, boolean isPushDown, List<Field> fields) {
          List<Item> newArgs = null;
          if (!forCalculate)
              newArgs = cloneStructList(args);
          else
              newArgs = calArgs;
          return new ItemFuncXor(newArgs.get(0), newArgs.get(1), this.charsetIndex);
      }
  
  }
  