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.mathsfunc;
  
  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 ItemFuncSign extends ItemIntFunc {
  
      public ItemFuncSign(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "sign";
      }
  
      @Override
      public BigInteger valInt() {
          double value = args.get(0).valReal().doubleValue();
          nullValue = args.get(0).isNullValue();
          return value < 0.0 ? BigInteger.ONE.negate() : (value > 0 ? BigInteger.ONE : BigInteger.ZERO);
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncSign(realArgs, charsetIndex);
      }
  }
  