How can i rotate this schematic?

Hey guys, i'm using this class for load and paste schematics and i really don't know how can i make it rotate to 90 degress and 270 and i really need it.

Code:

public class SchematicUtil {
    public String name;
    public short[] blocks;
    public byte[] data;
    public short width;
    public short lenght;
    public short height;
   
    public static SchematicUtil loadSchematic(String name) {
        if (!name.endsWith(".schematic"))
            name = name + ".schematic";
        File file = new File(APlugin.plugin.getDataFolder() + "/schematics/" + name);
        if (!file.exists())
            return null;
        try {
            FileInputStream stream = new FileInputStream(file);
            NBTTagCompound nbtdata = NBTCompressedStreamTools.a(stream);

            short width = nbtdata.getShort("Width");
            short height = nbtdata.getShort("Height");
            short length = nbtdata.getShort("Length");

            byte[] blocks = nbtdata.getByteArray("Blocks");
            byte[] data = nbtdata.getByteArray("Data");

            byte[] addId = new byte[0];

            if (nbtdata.hasKey("AddBlocks")) {
                addId = nbtdata.getByteArray("AddBlocks");
            }

            short[] sblocks = new short[blocks.length];
            for (int index = 0; index < blocks.length; index++) {
                if ((index >> 1) >= addId.length) {
                    sblocks[index] = (short) (blocks[index] & 0xFF);
                } else {
                    if ((index & 1) == 0) {
                        sblocks[index] = (short) (((addId[index >> 1] & 0x0F) << 8) + (blocks[index] & 0xFF));
                    } else {
                        sblocks[index] = (short) (((addId[index >> 1] & 0xF0) << 4) + (blocks[index] & 0xFF));
                    }
                }
            }

            stream.close();
            return new SchematicUtil(name, sblocks, data, width, length, height);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
   
    @SuppressWarnings("deprecation")
    public static void pasteSchematic(World world, Location loc, SchematicUtil schematic)
    {
        short[] blocks = schematic.getBlocks();
        byte[] blockData = schematic.getData();
        short length = schematic.getLenght();
        short width = schematic.getWidth();
        short height = schematic.getHeight();
        for (int x = 0; x < width; ++x) {
            for (int y = 0; y < height; ++y) {
                for (int z = 0; z < length; ++z) {
                    int index = y * width * length + z * width + x;
                    Block block = new Location(world, x + loc.getX(), y + loc.getY(), z + loc.getZ()).getBlock();
                    block.setTypeIdAndData(blocks[index], blockData[index], true);
                }
            }
        }
    }
   
    public SchematicUtil(String name, short[] blocks, byte[] data, short width, short lenght, short height) {
        this.name = name;
        this.blocks = blocks;
        this.data = data;
        this.width = width;
        this.lenght = lenght;
        this.height = height;
    }
   
    public short[] getBlocks()
    {
        return blocks;
    }
    /**
    * @return the data
    */
    public byte[] getData()
    {
        return data;
    }
    /**
    * @return the width
    */
    public short getWidth()
    {
        return width;
    }
    /**
    * @return the lenght
    */
    public short getLenght()
    {
        return lenght;
    }
    /**
    * @return the height
    */
    public short getHeight()
    {
        return height;
    }

PLEASE I NEED HELP! SORRY FOR MY BAD ENGLISH