mirror of
https://github.com/PaperMC/Paper.git
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177 lines
8.4 KiB
Diff
177 lines
8.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Mariell Hoversholm <proximyst@proximyst.com>
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Date: Thu, 30 Apr 2020 16:56:31 +0200
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Subject: [PATCH] Add Raw Byte ItemStack Serialization
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Serializes using NBT which is safer for server data migrations than bukkits format.
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Co-authored-by: Nassim Jahnke <nassim@njahnke.dev>
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diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
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index 6e67fdb091a006d2d13bc2d93db4d55348af4c8f..e41d5d9b810c8816cd0d1eba5fd1ea56252fb0df 100644
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--- a/src/main/java/org/bukkit/UnsafeValues.java
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+++ b/src/main/java/org/bukkit/UnsafeValues.java
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@@ -170,5 +170,9 @@ public interface UnsafeValues {
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default com.destroystokyo.paper.util.VersionFetcher getVersionFetcher() {
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return new com.destroystokyo.paper.util.VersionFetcher.DummyVersionFetcher();
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}
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+
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+ byte[] serializeItem(ItemStack item);
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+
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+ ItemStack deserializeItem(byte[] data);
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// Paper end
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}
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diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
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index e9c29fc1db686b80bc2477d78ec2b361b8600b9e..af09398e0864d338da530495bfd577db8adbe65a 100644
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--- a/src/main/java/org/bukkit/inventory/ItemStack.java
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+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
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@@ -661,6 +661,117 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
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return Bukkit.getServer().getItemFactory().ensureServerConversions(this);
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}
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+ /**
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+ * Deserializes this itemstack from raw NBT bytes. NBT is safer for data migrations as it will
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+ * use the built in data converter instead of bukkits dangerous serialization system.
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+ *
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+ * This expects that the DataVersion was stored on the root of the Compound, as saved from
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+ * the {@link #serializeAsBytes()} API returned.
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+ * @param bytes bytes representing an item in NBT
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+ * @return ItemStack migrated to this version of Minecraft if needed.
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+ */
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+ @NotNull
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+ public static ItemStack deserializeBytes(@NotNull byte[] bytes) {
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+ return org.bukkit.Bukkit.getUnsafe().deserializeItem(bytes);
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+ }
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+
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+ /**
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+ * Serializes this itemstack to raw bytes in NBT. NBT is safer for data migrations as it will
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+ * use the built in data converter instead of bukkits dangerous serialization system.
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+ * @return bytes representing this item in NBT.
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+ */
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+ @NotNull
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+ public byte[] serializeAsBytes() {
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+ return org.bukkit.Bukkit.getUnsafe().serializeItem(this);
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+ }
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+
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+ /**
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+ * The current version byte of the item array format used in {@link #serializeItemsAsBytes(java.util.Collection)}
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+ * and {@link #deserializeItemsFromBytes(byte[])} respectively.
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+ */
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+ private static final byte ARRAY_SERIALIZATION_VERSION = 1;
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+
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+ /**
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+ * Serializes a collection of items to raw bytes in NBT. Serializes null items as {@link #empty()}.
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+ * <p>
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+ * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.
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+ *
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+ * @param items items to serialize
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+ * @return bytes representing the items in NBT
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+ * @see #serializeAsBytes()
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+ */
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+ public static byte @NotNull [] serializeItemsAsBytes(java.util.@NotNull Collection<ItemStack> items) {
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+ try (final java.io.ByteArrayOutputStream outputStream = new java.io.ByteArrayOutputStream()) {
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+ final java.io.DataOutput output = new java.io.DataOutputStream(outputStream);
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+ output.writeByte(ARRAY_SERIALIZATION_VERSION);
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+ output.writeInt(items.size());
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+ for (final ItemStack item : items) {
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+ if (item == null || item.isEmpty()) {
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+ // Ensure the correct order by including empty/null items
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+ output.writeInt(0);
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+ continue;
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+ }
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+
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+ final byte[] itemBytes = item.serializeAsBytes();
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+ output.writeInt(itemBytes.length);
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+ output.write(itemBytes);
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+ }
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+ return outputStream.toByteArray();
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+ } catch (final java.io.IOException e) {
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+ throw new RuntimeException("Error while writing itemstack", e);
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+ }
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+ }
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+
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+ /**
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+ * Serializes a collection of items to raw bytes in NBT. Serializes null items as {@link #empty()}.
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+ * <p>
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+ * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.
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+ *
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+ * @param items items to serialize
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+ * @return bytes representing the items in NBT
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+ * @see #serializeAsBytes()
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+ */
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+ public static byte @NotNull [] serializeItemsAsBytes(@Nullable ItemStack @NotNull [] items) {
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+ return serializeItemsAsBytes(java.util.Arrays.asList(items));
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+ }
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+
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+ /**
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+ * Deserializes this itemstack from raw NBT bytes.
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+ * <p>
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+ * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.
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+ *
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+ * @param bytes bytes representing an item in NBT
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+ * @return ItemStack array migrated to this version of Minecraft if needed
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+ * @see #deserializeBytes(byte[])
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+ */
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+ public static @NotNull ItemStack @NotNull [] deserializeItemsFromBytes(final byte @NotNull [] bytes) {
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+ try (final java.io.ByteArrayInputStream inputStream = new java.io.ByteArrayInputStream(bytes)) {
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+ final java.io.DataInputStream input = new java.io.DataInputStream(inputStream);
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+ final byte version = input.readByte();
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+ if (version != ARRAY_SERIALIZATION_VERSION) {
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+ throw new IllegalArgumentException("Unsupported version or bad data: " + version);
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+ }
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+
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+ final int count = input.readInt();
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+ final ItemStack[] items = new ItemStack[count];
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+ for (int i = 0; i < count; i++) {
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+ final int length = input.readInt();
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+ if (length == 0) {
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+ // Empty item, keep entry as empty
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+ items[i] = ItemStack.empty();
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+ continue;
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+ }
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+
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+ final byte[] itemBytes = new byte[length];
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+ input.read(itemBytes);
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+ items[i] = ItemStack.deserializeBytes(itemBytes);
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+ }
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+ return items;
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+ } catch (final java.io.IOException e) {
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+ throw new RuntimeException("Error while reading itemstack", e);
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+ }
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+ }
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+
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/**
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* Gets the Display name as seen in the Client.
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* Currently the server only supports the English language. To override this,
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diff --git a/src/main/java/org/bukkit/util/io/BukkitObjectInputStream.java b/src/main/java/org/bukkit/util/io/BukkitObjectInputStream.java
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index 0f8eb97bd5e2f8b0f0cc03f7c4342aae06c4520c..6c074ff2dcfc279657037013b9b54890d7c8a533 100644
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--- a/src/main/java/org/bukkit/util/io/BukkitObjectInputStream.java
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+++ b/src/main/java/org/bukkit/util/io/BukkitObjectInputStream.java
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@@ -14,7 +14,11 @@ import org.bukkit.configuration.serialization.ConfigurationSerialization;
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* <p>
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* Behavior of implementations extending this class is not guaranteed across
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* future versions.
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+ * @deprecated Object streams on their own are not safe. For safer and more consistent serialization of items,
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+ * use {@link org.bukkit.inventory.ItemStack#serializeAsBytes()} or
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+ * {@link org.bukkit.inventory.ItemStack#serializeItemsAsBytes(java.util.Collection)}.
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*/
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+@Deprecated(since = "1.21") // Paper
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public class BukkitObjectInputStream extends ObjectInputStream {
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/**
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diff --git a/src/main/java/org/bukkit/util/io/BukkitObjectOutputStream.java b/src/main/java/org/bukkit/util/io/BukkitObjectOutputStream.java
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index dd1b9ee5f57773f07924aa311823fd8d63195cb2..4e24e7c73271a579db2c4309951693dfb2fecceb 100644
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--- a/src/main/java/org/bukkit/util/io/BukkitObjectOutputStream.java
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+++ b/src/main/java/org/bukkit/util/io/BukkitObjectOutputStream.java
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@@ -14,7 +14,11 @@ import org.bukkit.configuration.serialization.ConfigurationSerializable;
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* <p>
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* Behavior of implementations extending this class is not guaranteed across
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* future versions.
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+ * @deprecated Object streams on their own are not safe. For safer and more consistent serialization of items,
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+ * use {@link org.bukkit.inventory.ItemStack#serializeAsBytes()} or
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+ * {@link org.bukkit.inventory.ItemStack#serializeItemsAsBytes(java.util.Collection)}.
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*/
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+@Deprecated(since = "1.21") // Paper
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public class BukkitObjectOutputStream extends ObjectOutputStream {
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/**
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