package mockit.asm.constantPool;
   
   import static mockit.asm.constantPool.TypeTableItem.SpecialType.MERGED;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   
   import org.checkerframework.checker.index.qual.NonNegative;
   
   final class MergedTypeTableItem extends TypeTableItem {
      private int type1;
      private int type2;
      @NonNegative
      int commonSuperTypeIndex;
  
      MergedTypeTableItem() {
          type = MERGED;
      }
  
      MergedTypeTableItem(@NonNull MergedTypeTableItem item) {
          super(0, item);
          type1 = item.type1;
          type2 = item.type2;
          commonSuperTypeIndex = item.commonSuperTypeIndex;
      }
  
      /**
       * Sets the types of this merged type table item.
       *
       * @param type1
       *            index of an internal name in the type table.
       * @param type2
       *            index of an internal name in the type table.
       */
      void set(@NonNegative int type1, @NonNegative int type2) {
          this.type1 = type1;
          this.type2 = type2;
          setHashCode(type1 + type2);
      }
  
      @Override
      boolean isEqualTo(@NonNull Item item) {
          MergedTypeTableItem other = (MergedTypeTableItem) item;
          return other.type1 == type1 && other.type2 == type2;
      }
  }