Verify Take and Put item from inventory

InventoryListener.java

public class InventoryListener implements Listener {

    @EventHandler
    public void onInventoryInteract(final InventoryClickEvent event) {
        if (event.getInventory() == null) return;
        int slot = event.getRawSlot();
        if (slot < event.getInventory().getSize()) {
            //Verify inventory
            Player player = (Player) event.getWhoClicked();
            PlayerInventory playerInventory = player.getInventory();
            Inventory inventory = event.getInventory();
            ItemStack item = inventory.getItem(slot);
            if (item == null) {
                //If the item on the slot is null
                int hotBar = event.getHotbarButton();
                if (hotBar == -1) {
                    //If isn't hotbar verify normal click
                    item = event.getCursor();
                    if (item == null || item.getType() == Material.AIR) return;
                    callEvent(new PutItemEvent(player, inventory, item));
                    return;
                }
                //Is hotbar
                item = playerInventory.getItem(hotBar);
                if (item == null) return;
                callEvent(new PutItemEvent(player, inventory, item));
                return;
            }
            //Item isn't null
            if (event.getClick().isShiftClick()) {
                //Is shift click, verify free space player inventory
                if (playerInventory.firstEmpty() == -1) return;
                callEvent(new TakeItemEvent(player, playerInventory, item));
                return;
            }
            int hotBar = event.getHotbarButton();
            if (hotBar > -1) {
                //Verify hotbar and verify free space player
                if (playerInventory.firstEmpty() == -1) return;
                callEvent(new TakeItemEvent(player, playerInventory, item));
                return;
            }
            //Normal click
            callEvent(new TakeItemEvent(player, playerInventory, item));
        }
        
        if (event.isShiftClick()) {
            //Verify put with shift
            ItemStack item = event.getClickedInventory().getItem(event.getSlot());
            if (item == null) return;
            if (inventory.firstEmpty() == -1) return;
            callEvent(new PutItemEvent(player, inventory, item));
        }

    }

    @EventHandler
    public void onTake(TakeItemEvent event) {
        System.out.println("take");
    }

    @EventHandler
    public void onPut(PutItemEvent event) {
        System.out.println("put");
    }

    public void callEvent(Event event) {
        Bukkit.getServer().getPluginManager().callEvent(event);
    }

}

PutItemEvent.java

public class PutItemEvent extends Event {

    private static final HandlerList HANDLERS = new HandlerList();

    private final Player player;
    private final Inventory targetInventory;
    private final ItemStack item;
  
    public PutItemEvent(Player player, Inventory targetInventory, ItemStack item) {
        this.player = player;
        this.targetInventory = targetInventory;
        this.item = item;
    }

    public Player getPlayer() {
        return player;
    }

    public Inventory getTargetInventory() {
        return targetInventory;
    }

    public ItemStack getItem() {
        return item;
    }
  
    @Override
    public HandlerList getHandlers() {
        return HANDLERS;
    }

    public static HandlerList getHandlerList() {
        return HANDLERS;
    }

}

TakeItemEvent.java

public class TakeItemEvent extends Event {

    private static final HandlerList HANDLERS = new HandlerList();

    private final Player player;
    private final Inventory fromInventory;
    private final ItemStack item;
    
    public TakeItemEvent(Player player, Inventory fromInventory, ItemStack item) {
        this.player = player;
        this.fromInventory = fromInventory;
        this.item = item;
    }
  
  
    public Player getPlayer() {
        return player;
    }

    public Inventory getFromInventory() {
        return fromInventory;
    }

    public ItemStack getItem() {
        return item;
    }

    @Override
    public HandlerList getHandlers() {
        return HANDLERS;
    }

    public static HandlerList getHandlerList() {
        return HANDLERS;
    }

}