ArrowTrapHook.java

public class ArrowTrapHook extends BehaviorProjectileDispense
{
     /**
     * Dispenses the specified ItemStack from a dispenser.
     * @return
     */
    //Commented out because "cannot override the final method from BehaviorDefaultDispenseItem"
   //public ItemStack dispense(IBlockSource source, ItemStack stack)
   //{
     // ItemStack itemstack = this.dispenseStack(source, stack);
     // this.playDispenseSound(source);
    //   this.spawnDispenseParticles(source, (EnumFacing)source.getBlockState().getValue(ArrowTrap.FACING));
   //  return itemstack;
 // }

    @Override
    protected IProjectile getProjectileEntity(World worldIn, IPosition position, ItemStack stackIn) {
        return null;
        // TODO Auto-generated method stub
    }

    /**
     * Dispense the specified stack, play the dispense sound and spawn particles.
     */
    public ItemStack dispenseStack(IBlockSource source, ItemStack stack)
    {
        EnumFacing enumfacing = (EnumFacing)source.getBlockState().getValue(ArrowTrap.FACING);
        IPosition iposition = ArrowTrap.getDispensePosition(source);
        ItemStack itemstack = stack.splitStack(1);
        doDispense(source.getWorld(), itemstack, 6, enumfacing, iposition);
        return stack;
    }

    public static void doDispense(World worldIn, ItemStack stack, int speed, EnumFacing facing, IPosition position)
    {
        double d0 = position.getX();
        double d1 = position.getY();
        double d2 = position.getZ();

        if (facing.getAxis() == EnumFacing.Axis.Y)
        {
            d1 = d1 - 0.125D;
        }
        else
        {
            d1 = d1 - 0.15625D;
        }

        EntityItem entityitem = new EntityItem(worldIn, d0, d1, d2, stack);
        double d3 = worldIn.rand.nextDouble() * 0.1D + 0.2D;
        entityitem.motionX = (double)facing.getFrontOffsetX() * d3;
        entityitem.motionY = 0.20000000298023224D;
        entityitem.motionZ = (double)facing.getFrontOffsetZ() * d3;
        entityitem.motionX += worldIn.rand.nextGaussian() * 0.007499999832361937D * (double)speed;
        entityitem.motionY += worldIn.rand.nextGaussian() * 0.007499999832361937D * (double)speed;
        entityitem.motionZ += worldIn.rand.nextGaussian() * 0.007499999832361937D * (double)speed;
        worldIn.spawnEntity(entityitem);
    }

    /**
     * Play the dispense sound from the specified block.
     */
    public void playDispenseSound(IBlockSource source)
    {
        source.getWorld().playEvent(1000, source.getBlockPos(), 0);
    }

    /**
     * Order clients to display dispense particles from the specified block and facing.
     */
    public void spawnDispenseParticles(IBlockSource source, EnumFacing facingIn)
    {
        source.getWorld().playEvent(2000, source.getBlockPos(), this.getWorldEventDataFrom(facingIn));
    }

    public int getWorldEventDataFrom(EnumFacing facingIn)
    {
        return facingIn.getFrontOffsetX() + 1 + (facingIn.getFrontOffsetZ() + 1) * 3;
    }
}