Location safety test

gistfile1.java

/**
     * Returns if the location is save.
     * @return if the location is save. Is false if invalid.
     */
    public boolean isSave() {
        //TODO: Check if the player can fall through: Check below if there is a torch (not on ground), wall sign
        
        if (this.location.isValid()) {
            Location location = this.getLocation().toLocation();
            Material lower = location.getBlock().getType();
            LocationWrapper.moveX(location, 1.0D);
            Material higher = location.getBlock().getType();
            LocationWrapper.moveX(location, 1.0D);
            Material top = location.getBlock().getType();
            
            Boolean save = null;
            double comma = MinecraftUtil.getDecimalPlaces(location.getY());
            
            if (save == null) {
                if (comma <= 0.05D) {
                    save = checkOpaqueMaterials(lower, higher);
                } else {
                    if (comma > 0.5D) {
                        save = checkMaterials(lower, Material.STEP);
                    }
                    save = ((comma > 0.5D && checkMaterials(lower, Material.STEP)) || checkOpaqueMaterials(lower)) && checkOpaqueMaterials(higher, top);
                }
            }

            return save;
        } else {
            return false;
        }
    }
    
    private static boolean checkOpaqueMaterials(Material... materials) {
        //TODO: Move to Minecraft Util?
        // @formatter:off
        return checkMaterials(materials,
                // "Solids" blocks
                Material.AIR, Material.WATER, Material.STATIONARY_WATER, Material.SNOW,
                // Plants
                Material.SAPLING, Material.YELLOW_FLOWER, Material.RED_ROSE, Material.BROWN_MUSHROOM, Material.RED_MUSHROOM, Material.SUGAR_CANE_BLOCK, Material.CROPS, Material.LONG_GRASS,
                // Torches/Redstone
                Material.TORCH, Material.REDSTONE_TORCH_ON, Material.REDSTONE_TORCH_OFF, Material.REDSTONE_WIRE,
                // Signs
                Material.SIGN_POST, Material.WALL_SIGN,
                // Rails
                Material.RAILS, Material.POWERED_RAIL, Material.DETECTOR_RAIL,
                // Switches
                Material.LEVER, Material.STONE_PLATE, Material.WOOD_PLATE, Material.STONE_BUTTON,
                // Doors
                Material.WOODEN_DOOR, Material.IRON_DOOR,
                Material.LADDER,
                Material.PORTAL,
                Material.CAKE_BLOCK);
        // @formatter:on
    }
    
    private static boolean checkMaterials(Material material, Material... allowed) {
        return MinecraftUtil.contains(material, allowed);
    }
    
    private static boolean checkMaterials(Material[] materials, Material... allowed) {
        for (Material material : materials) {
            if (!MinecraftUtil.contains(material, allowed)) {
                return false;
            }
        }
        return true;
    }