@Override
protected void execute(final Event e) {
	if (!flattening) {
		executeLegacy(e);
		return;
	}
	
	// 1.13 and newer: use BlockData
	for (Block b : blocks.getArray(e)) {
		BlockData data = b.getBlockData();
		if (toggle == -1) {
			if (data instanceof Openable)
				((Openable) data).setOpen(false);
			else if (data instanceof Powerable)
				((Powerable) data).setPowered(false);
		} else if (toggle == 1) {
			if (data instanceof Openable)
				((Openable) data).setOpen(true);
			else if (data instanceof Powerable)
				((Powerable) data).setPowered(true);
		} else {
			if (data instanceof Openable) // open = NOT was open
				((Openable) data).setOpen(!((Openable) data).isOpen());
			else if (data instanceof Powerable) // power = NOT power
				((Powerable) data).setPowered(!((Powerable) data).isPowered());
		}
		
		b.setBlockData(data);
	}
}
 

@Override
public void openDoor(Block block) {
    if (!(block.getBlockData() instanceof Openable)) {
        throw new IllegalArgumentException("Block is not Openable");
    }
    Openable data = (Openable) block.getBlockData();
    data.setOpen(true);
    block.setBlockData(data);
}
 

@Override
public void closeDoor(Block block) {
    if (!(block.getBlockData() instanceof Openable)) {
        throw new IllegalArgumentException("Block is not Openable");
    }
    Openable data = (Openable) block.getBlockData();
    data.setOpen(false);
    block.setBlockData(data);
}
 

public void toggleDoor(Block b) {
    if (b.getBlockData() instanceof Openable) {
        Openable openable = (Openable) b.getBlockData();
        openable.setOpen(!openable.isOpen());
        b.setBlockData(openable);
    }
}
 

public boolean isOpenable(Block b) {
    return b.getBlockData() instanceof Openable;
}