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Base64 inventory serialization with NTB (Named Binary Tag).
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package code.MarinusLeeuwerik.utils; | |
/** | |
* Copyright (c) 2014 Marinus Leeuwerik | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL MARINUS LEEUWERIK BE LIABLE FOR ANY | |
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
import java.io.ByteArrayInputStream; | |
import java.io.ByteArrayOutputStream; | |
import java.io.DataInputStream; | |
import java.io.DataOutputStream; | |
import java.math.BigInteger; | |
import java.util.HashMap; | |
import java.util.Map; | |
import net.minecraft.server.NBTBase; | |
import net.minecraft.server.NBTTagCompound; | |
import net.minecraft.server.NBTTagList; | |
import org.apache.commons.lang.StringUtils; | |
import org.bukkit.craftbukkit.inventory.CraftInventoryCustom; | |
import org.bukkit.craftbukkit.inventory.CraftItemStack; | |
import org.bukkit.inventory.Inventory; | |
import org.bukkit.inventory.ItemStack; | |
import com.google.common.primitives.Bytes; | |
public class InventorySerialization { | |
private final static String textBase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; | |
private final static char[] alphabetBase64 = textBase64.toCharArray(); | |
private final static String regexBase64 = "[^" + textBase64 + "=]"; | |
public static String toBase64(Inventory inventory) { | |
ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); | |
DataOutputStream dataOutput = new DataOutputStream(outputStream); | |
NBTTagList itemList = new NBTTagList(); | |
for (int i = 0; i < inventory.getSize(); i++) { | |
NBTTagCompound outputObject = new NBTTagCompound(); | |
CraftItemStack craft = getCraftVersion(inventory.getItem(i)); | |
if (craft != null) | |
craft.getHandle().save(outputObject); | |
itemList.add(outputObject); | |
} | |
NBTBase.a(itemList, dataOutput); | |
return new BigInteger(1, outputStream.toByteArray()).toString(32); | |
} | |
public static Inventory fromBase64(String data) { | |
ByteArrayInputStream inputStream = new ByteArrayInputStream(new BigInteger(data, 32).toByteArray()); | |
NBTTagList itemList = (NBTTagList) NBTBase.b(new DataInputStream(inputStream)); | |
Inventory inventory = new CraftInventoryCustom(null, itemList.size()); | |
for (int i = 0; i < itemList.size(); i++) { | |
NBTTagCompound inputObject = (NBTTagCompound) itemList.get(i); | |
if (!inputObject.d()) { | |
inventory.setItem(i, new CraftItemStack(net.minecraft.server.ItemStack.a(inputObject))); | |
} | |
} | |
return inventory; | |
} | |
private static String encodeBase64(byte[] data) { | |
StringBuilder result = new StringBuilder(); | |
int padding = data.length % 3; | |
int readCount = 0; | |
if (padding != 0) { | |
padding = 3 - padding; | |
data = Bytes.concat(data, new byte[padding]); | |
} | |
for (int i = 0; i < data.length; i += 3) { | |
if (i > 0 && readCount % 76 == 0) | |
result.append("\r\n"); | |
int window = (data[i] << 16) + (data[i + 1] << 8) + (data[i + 2]); | |
int n1 = (window >> 18) & 0x3F, n2 = (window >> 12) & 0x3F, n3 = (window >> 6) & 0x3F, n4 = window & 0x3F; | |
result.append(alphabetBase64[n1]); | |
result.append(alphabetBase64[n2]); | |
result.append(alphabetBase64[n3]); | |
result.append(alphabetBase64[n4]); | |
readCount += 4; | |
} | |
return result.substring(0, result.length() - padding) + StringUtils.repeat("=", padding); | |
} | |
private static byte[] decodeBase64(String data) { | |
String subset = data.replaceAll(regexBase64, ""); | |
byte[] result = new byte[3 * subset.length() / 4]; | |
int count = 0; | |
Map<Character, Integer> lookup = new HashMap<Character, Integer>(); | |
for (int i = 0; i < alphabetBase64.length; i++) | |
lookup.put(alphabetBase64[i], i); | |
lookup.put('=', 0); | |
for (int i = 0; i < subset.length(); i += 4) { | |
int n = (lookup.get(subset.charAt(i)) << 18) | (lookup.get(subset.charAt(i + 1)) << 12) | | |
(lookup.get(subset.charAt(i + 2)) << 6) | lookup.get(subset.charAt(i + 3)); | |
result[count] = (byte) ((n >>> 16) & 0xFF); | |
result[count + 1] = (byte) ((n >>> 8) & 0xFF); | |
result[count + 2] = (byte) (n & 0xFF); | |
count += 3; | |
} | |
return result; | |
} | |
private static CraftItemStack getCraftVersion(ItemStack stack) { | |
if (stack instanceof CraftItemStack) | |
return (CraftItemStack) stack; | |
else if (stack != null) | |
return new CraftItemStack(stack); | |
else | |
return null; | |
} | |
} |
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