public class Inventory
{
    private Item[] items;
    public Inventory(Item[] items) {
        super();
        this.items = items;
    }

    public void updateQuality() {
        for (int i = 0; i < items.length; i++)
        {
           String itemName = items[i].getName().toUpperCase();
           String[] nameArr = itemName.replaceAll("[^A-Z0-9\\s]", "").split(" ");
           String output = (nameArr[0].equals("5")) ? "FIVE" : nameArr[0];

           BigSellers.valueOf(output).quality(items[i]);
        }
    }
//vvvvvvvvvvvvvvvvvvvvvvvvvvvvvBIG OL ENUMvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
    public enum BigSellers {
//------------------------------SULFURAS---------------------------------------
        SULFURAS() {
            @Override public void quality(Item x) {
              return;
            }
        },
//----------------------------------------------------------------------------
//----------------------------AGED BRIE---------------------------------------
        AGED() {
            @Override public void quality(Item x) {
              int currentQuality = x.getQuality();
              int sellIn = x.getSellIn();
              int adjustPrice = sellIn > 0 ? 1 : 2;
              //---------------------------------------
              if (currentQuality < 50) {
                x.setQuality(currentQuality + adjustPrice);
              }
              //--------------------------------------
              x.setSellIn(sellIn - 1);
            }
        },
//-----------------------------------------------------------------------------
//-------------------------BACKSTAGE PASSES------------------------------------
        BACKSTAGE() {
            @Override public void quality(Item x) {
              int currentQuality = x.getQuality();
              int sellIn = x.getSellIn();
              int adjustPrice = sellIn <= 5  ? 3 :
                                sellIn <= 10 ? 2 :
                                               1 ;
              //-------------------------------------
              if (sellIn >= 0) {
                if (currentQuality + adjustPrice >= 50) {
                  x.setQuality(50);
                }
                else x.setQuality(currentQuality + adjustPrice);
              }
              else x.setQuality(0);
              //--------------------------------------
              x.setSellIn(sellIn - 1);
            }
        },
//-----------------------------------------------------------------------------
//-----------------------------+5 DEX------------------------------------------
        FIVE() {
            @Override public void quality(Item x) {
                int currentQuality = x.getQuality();
                int sellIn = x.getSellIn();
                //------------------------------------------
                if (currentQuality > 0) {
                    if(sellIn >= 0) {
                      x.setQuality(currentQuality - 1);
                    }
                    else x.setQuality(currentQuality - 2);
                }
                //------------------------------------------
                x.setSellIn(sellIn - 1);
            }
        };
//-----------------------------------------------------------------------------
        public abstract void quality(Item x); //<--------template method
    }
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^END OF ENUM^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
}