Out of curiosity and desire to have not only working but well-written code, wondering the best way to implement IGuiHandler while respecting sidedness

The below code works (but only with a @SideOnly annotation in TileEntity when run on dedicated server). If not using annotation will throw:

java.lang.RuntimeException: Attempted to load class net/minecraft/client/gui/inventory/GuiContainer for invalid side SERVER

 

I have currently implemented my IGuiHandler as:

public class GuiHandler implements IGuiHandler {

    @Nullable
    @Override
    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        BlockPos pos = new BlockPos(x, y, z);
        TileEntity te = world.getTileEntity(pos);
        if (te instanceof IGuiTile) {
            return ((IGuiTile) te).createContainer(player);
        }
        return null;
    }

    @Nullable
    @Override
    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
        BlockPos pos = new BlockPos(x, y, z);
        TileEntity te = world.getTileEntity(pos);
        if (te instanceof IGuiTile) {
            return ((IGuiTile) te).createGui(player);
        }
        return null;
    }
    
}

 

IGuiTile

public interface IGuiTile {
	
	Container createContainer(EntityPlayer player);
	
	GuiContainer createGui(EntityPlayer player);

}

 

and my Tile Entity subclass has the following implementation:

	@Override
	public Container createContainer(EntityPlayer player) {
		return new ContainerFurnace(player.inventory, this);
	}

	@SideOnly(Side.CLIENT)
	@Override
	public GuiContainer createGui(EntityPlayer player) {
		return new GuiFurnace(this, new ContainerFurnace(player.inventory, this));
	}
	

 

 

ps. above code was largely from a Mcjty tutorial as I was learning, and his didn't use the @SideOnly. I don't think he ran his on dedicated server during the tutorial to find this error...

 

Thanks all!

You might want to take a look at https://github.com/Cadiboo/Example-Mod/blob/4ed728a75815285c6382420832a1b671142e60c4/src/main/java/io/github/cadiboo/examplemod/util/ModGuiHandler.java