public static void equip(final MapleClient c, final short src, short dst) {
   Equip source = (Equip) c.getPlayer().getInventory(MapleInventoryType.EQUIP).getItem(src);
   Equip target = (Equip) c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem(dst);
   if (dst == -12 && target != null) {
     if (c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) -13) == null) {
       dst = (short) -13;
       target = null;
     }
     for (int i = 0; i < 2; i++) {
       if (c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) (i - 16))
           == null) {
         dst = (short) (i - 16);
         target = null;
       }
     }
     if (target != null) {
       return;
     }
   }
   if (isPE(source.getId(), dst)
       || source == null
       || (MapleItemInformationProvider.getInstance().getReqLevel(source.getId())
               > c.getPlayer().getLevel()
           && c.getPlayer().gmLevel() < 1)
       || (((source.getId() >= 1902000 && source.getId() <= 1902002) || source.getId() == 1912000)
           && c.getPlayer().getJobType() != 0)
       || (((source.getId() >= 1902005 && source.getId() <= 1902007) || source.getId() == 1912005)
           && c.getPlayer().getJobType() != 1)
       || (((source.getId() >= 1902015 && source.getId() <= 1902018) || source.getId() == 1912011)
           && !c.getPlayer().isAran())) {
     return;
   }
   if (MapleItemInformationProvider.getInstance().isUntradeableOnEquip(source.getId())) {
     source.setFlag((byte) InventoryConstants.UNTRADEABLE);
     c.announce(InventoryFactory.updateSlot(source));
   }
   if (dst == -6) { // unequip the overall
     final IItem top = c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) -5);
     if (top != null && isOverall(top.getId())) {
       if (c.getPlayer().getInventory(MapleInventoryType.EQUIP).isFull()) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
         return;
       }
       unequip(
           c, (short) -5, c.getPlayer().getInventory(MapleInventoryType.EQUIP).getNextFreeSlot());
     }
   } else if (dst == -5) { // equip overall
     final IItem bottom =
         c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) -6);
     if (bottom != null && isOverall(source.getId())) {
       if (c.getPlayer().getInventory(MapleInventoryType.EQUIP).isFull()) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
         return;
       }
       unequip(
           c, (short) -6, c.getPlayer().getInventory(MapleInventoryType.EQUIP).getNextFreeSlot());
     }
   } else if (dst == -10) { // check if weapon is two-handed
     final IItem weapon =
         c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) -11);
     if (weapon != null
         && MapleItemInformationProvider.getInstance().isTwoHanded(weapon.getId())) {
       if (c.getPlayer().getInventory(MapleInventoryType.EQUIP).isFull()) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
         return;
       }
       unequip(
           c, (short) -11, c.getPlayer().getInventory(MapleInventoryType.EQUIP).getNextFreeSlot());
     }
   } else if (dst == -11) { // unequip shield
     final IItem shield =
         c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).getItem((short) -10);
     if (shield != null
         && MapleItemInformationProvider.getInstance().isTwoHanded(source.getId())) {
       if (c.getPlayer().getInventory(MapleInventoryType.EQUIP).isFull()) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
         return;
       }
       unequip(
           c, (short) -10, c.getPlayer().getInventory(MapleInventoryType.EQUIP).getNextFreeSlot());
     }
   }
   if (dst == -18) {
     if (c.getPlayer().getMount() != null) {
       c.getPlayer().getMount().setId(source.getId());
     }
   }
   c.getPlayer().getInventory(MapleInventoryType.EQUIP).removeSlot(src);
   if (target != null) {
     c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).removeSlot(dst);
   }
   source.setPosition(dst);
   c.getPlayer().getInventory(MapleInventoryType.EQUIPPED).addFromDB(source);
   if (target != null) {
     target.setPosition(src);
     c.getPlayer().getInventory(MapleInventoryType.EQUIP).addFromDB(target);
   }
   if (c.getPlayer().getBuffedValue(MapleBuffStat.BOOSTER) != null && isWeapon(source.getId())) {
     c.getPlayer().cancelBuffStats(MapleBuffStat.BOOSTER);
   }
   c.announce(InventoryFactory.moveInventoryItem(MapleInventoryType.EQUIP, src, dst, (byte) 2));
   c.getPlayer().equipChanged();
   if (source.getId() >= 1112001 && source.getId() <= 1112006) {
     c.getPlayer().setMarriageRing(MapleRing.loadFromDB(c.getPlayer()));
     c.announce(IntraPersonalFactory.getCharInfo(c.getPlayer()));
     c.getPlayer().getMap().removePlayer(c.getPlayer());
     c.getPlayer().getMap().addPlayer(c.getPlayer());
   }
 }
 public static boolean addById(MapleClient c, int Id, short quantity, String owner, int petid) {
   final MapleItemInformationProvider ii = MapleItemInformationProvider.getInstance();
   final MapleInventoryType type = ii.getInventoryType(Id);
   if (!type.equals(MapleInventoryType.EQUIP)) {
     final short slotMax = ii.getSlotMax(c, Id);
     final List<IItem> existing = c.getPlayer().getInventory(type).listById(Id);
     if (!InventoryConstants.isRechargable(Id)) {
       if (existing.size() > 0) { // first update all existing slots to slotMax
         Iterator<IItem> i = existing.iterator();
         while (quantity > 0) {
           if (i.hasNext()) {
             Item eItem = (Item) i.next();
             short oldQ = eItem.getQuantity();
             if (oldQ < slotMax && (eItem.getOwner().equals(owner) || owner == null)) {
               short newQ = (short) Math.min(oldQ + quantity, slotMax);
               quantity -= (newQ - oldQ);
               eItem.setQuantity(newQ);
               c.announce(InventoryFactory.updateInventorySlot(type, eItem));
             }
           } else {
             break;
           }
         }
       }
       while (quantity > 0 || InventoryConstants.isRechargable(Id)) {
         short newQ = (short) Math.min(quantity, slotMax);
         if (newQ != 0) {
           quantity -= newQ;
           Item nItem = new Item(Id, (short) 0, newQ, petid);
           short newSlot = c.getPlayer().getInventory(type).addItem(nItem);
           if (newSlot == -1) {
             c.announce(InventoryFactory.getInventoryFull());
             c.announce(InventoryFactory.getShowInventoryFull());
             return false;
           }
           if (owner != null) {
             nItem.setOwner(owner);
           }
           c.announce(InventoryFactory.addInventorySlot(type, nItem));
           if ((InventoryConstants.isRechargable(Id)) && quantity == 0) {
             break;
           }
         } else {
           c.announce(IntraPersonalFactory.enableActions());
           return false;
         }
       }
     } else {
       final Item nItem = new Item(Id, (short) 0, quantity);
       final short newSlot = c.getPlayer().getInventory(type).addItem(nItem);
       if (newSlot == -1) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
         return false;
       }
       c.announce(InventoryFactory.addInventorySlot(type, nItem));
       c.announce(IntraPersonalFactory.enableActions());
     }
   } else if (quantity == 1) {
     IItem nEquip = ii.getEquipById(Id);
     if (owner != null) {
       nEquip.setOwner(owner);
     }
     short newSlot = c.getPlayer().getInventory(type).addItem(nEquip);
     if (newSlot == -1) {
       c.announce(InventoryFactory.getInventoryFull());
       c.announce(InventoryFactory.getShowInventoryFull());
       return false;
     }
     c.announce(InventoryFactory.addInventorySlot(type, nEquip));
   } else {
     throw new RuntimeException("Trying to create equip with non-one quantity");
   }
   return true;
 }
 public static boolean addFromDrop(
     final MapleClient c, final IItem item, final boolean show, final boolean showAnyMessage) {
   final MapleItemInformationProvider ii = MapleItemInformationProvider.getInstance();
   if (ii.isPickupRestricted(item.getId())
       && c.getPlayer().getItemQuantity(item.getId(), true) > 0
       && showAnyMessage) {
     c.announce(InventoryFactory.getInventoryFull());
     c.announce(InventoryFactory.showItemUnavailable());
     return false;
   }
   final MapleInventoryType type = ii.getInventoryType(item.getId());
   short quantity = item.getQuantity();
   if (!type.equals(MapleInventoryType.EQUIP)) {
     final short slotMax = ii.getSlotMax(c, item.getId());
     final List<IItem> existing = c.getPlayer().getInventory(type).listById(item.getId());
     if (!InventoryConstants.isRechargable(item.getId())) {
       if (existing.size() > 0) { // first update all existing slots to slotMax
         Iterator<IItem> i = existing.iterator();
         while (quantity > 0) {
           if (i.hasNext()) {
             final Item eItem = (Item) i.next();
             final short oldQ = eItem.getQuantity();
             if (oldQ < slotMax && item.getOwner().equals(eItem.getOwner())) {
               short newQ = (short) Math.min(oldQ + quantity, slotMax);
               quantity -= (newQ - oldQ);
               eItem.setQuantity(newQ);
               short newQi = (short) Math.min(quantity, slotMax);
               quantity -= newQi;
               Item nItem = new Item(item.getId(), (short) 0, newQi);
               nItem.setOwner(item.getOwner());
               if (c.getPlayer().getInventory(type).fakeAddItem(nItem) == -1) {
                 eItem.setQuantity(oldQ);
                 return false;
               }
               quantity += newQi;
               c.announce(InventoryFactory.updateInventorySlot(type, eItem, showAnyMessage));
             }
           } else {
             break;
           }
         }
       }
       while (quantity > 0 || InventoryConstants.isRechargable(item.getId())) {
         final short newQ = (short) Math.min(quantity, slotMax);
         quantity -= newQ;
         final Item nItem = new Item(item.getId(), (short) 0, newQ);
         nItem.setOwner(item.getOwner());
         final short newSlot = c.getPlayer().getInventory(type).addItem(nItem);
         if (newSlot == -1) {
           if (showAnyMessage) {
             c.announce(InventoryFactory.getInventoryFull());
             c.announce(InventoryFactory.getShowInventoryFull());
           }
           item.setQuantity((short) (quantity + newQ));
           return false;
         }
         c.announce(InventoryFactory.addInventorySlot(type, nItem, true));
         if ((InventoryConstants.isRechargable(item.getId())) && quantity == 0) {
           break;
         }
       }
     } else {
       final Item nItem = new Item(item.getId(), (short) 0, quantity);
       final short newSlot = c.getPlayer().getInventory(type).addItem(nItem);
       if (newSlot == -1) {
         if (showAnyMessage) {
           c.announce(InventoryFactory.getInventoryFull());
           c.announce(InventoryFactory.getShowInventoryFull());
         }
         return false;
       }
       c.announce(InventoryFactory.addInventorySlot(type, nItem));
       c.announce(IntraPersonalFactory.enableActions());
     }
   } else if (quantity == 1) {
     final short newSlot = c.getPlayer().getInventory(type).addItem(item);
     if (newSlot == -1) {
       if (showAnyMessage) {
         c.announce(InventoryFactory.getInventoryFull());
         c.announce(InventoryFactory.getShowInventoryFull());
       }
       return false;
     }
     c.announce(InventoryFactory.addInventorySlot(type, item, true));
   } else {
     return false;
   }
   if (show) {
     c.announce(EffectFactory.getShowItemGain(item.getId(), item.getQuantity()));
   }
   return true;
 }