PaperMC/patches/api/0166-Fix-Spigot-annotation-mistakes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 24 Mar 2019 18:39:01 -0400
Subject: [PATCH] Fix Spigot annotation mistakes

while some of these may of been true, they are extreme cases and cause
a ton of noise to plugin developers.

Use ApiStatus.Internal instead of Deprecated for actual internal API
that continues to have use (internally).

These do not help plugin developers if they bring moise noise than value.

diff --git a/src/main/java/org/bukkit/Art.java b/src/main/java/org/bukkit/Art.java
index dadff073abb2dec39111e677ec77ffdb2b7ff9a9..042d1d932a33022e4fc873652f70dc6ed342d46a 100644
--- a/src/main/java/org/bukkit/Art.java
+++ b/src/main/java/org/bukkit/Art.java
@@ -96,9 +96,9 @@ public enum Art implements Keyed {
      * Get the ID of this painting.
      *
      * @return The ID of this painting
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public int getId() {
         return id;
     }
@@ -114,9 +114,9 @@ public enum Art implements Keyed {
      *
      * @param id The ID
      * @return The painting
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static Art getById(int id) {
         return BY_ID.get(id);
diff --git a/src/main/java/org/bukkit/Bukkit.java b/src/main/java/org/bukkit/Bukkit.java
index fb143a39f81ca7f14688ee3515a06256feac0f80..7b29a19610dbdc99e3662f70a8a291e6203edd1a 100644
--- a/src/main/java/org/bukkit/Bukkit.java
+++ b/src/main/java/org/bukkit/Bukkit.java
@@ -880,9 +880,8 @@ public final class Bukkit {
      *
      * @param id the id of the map to get
      * @return a map view if it exists, or null otherwise
-     * @deprecated Magic value
      */
-    @Deprecated
+    //@Deprecated // Paper - Not a magic value
     @Nullable
     public static MapView getMap(int id) {
         return server.getMap(id);
@@ -961,8 +960,14 @@ public final class Bukkit {
      * Returns the primary logger associated with this server instance.
      *
      * @return Logger associated with this server
+     * @see org.bukkit.plugin.Plugin#getSLF4JLogger()
+     * @apiNote This logger is for the Minecraft server software, not for specific plugins. You should
+     * use a logger for a specific plugin, either via {@link org.bukkit.plugin.Plugin#getSLF4JLogger()}
+     * or {@link org.bukkit.plugin.Plugin#getLogger()} or create a specific logger for a class via slf4j.
+     * That way, log messages contain contextual information about the source of the message.
      */
     @NotNull
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper - internalize Bukkit#getLogger
     public static Logger getLogger() {
         return server.getLogger();
     }
@@ -1359,10 +1364,8 @@ public final class Bukkit {
      * @param name the name the player to retrieve
      * @return an offline player
      * @see #getOfflinePlayer(java.util.UUID)
-     * @deprecated Persistent storage of users should be by UUID as names are no longer
-     *             unique past a single session.
      */
-    @Deprecated
+    // @Deprecated // Paper
     @NotNull
     public static OfflinePlayer getOfflinePlayer(@NotNull String name) {
         return server.getOfflinePlayer(name);
@@ -1975,7 +1978,7 @@ public final class Bukkit {
      *
      * @return the scoreboard manager or null if no worlds are loaded.
      */
-    @Nullable
+    @NotNull // Paper
     public static ScoreboardManager getScoreboardManager() {
         return server.getScoreboardManager();
     }
diff --git a/src/main/java/org/bukkit/CoalType.java b/src/main/java/org/bukkit/CoalType.java
index c07499dbdd49d70717dbd674d97b6dbcfd7e9d5b..75e563d2a6d417b95c7f06a0636811aec8259672 100644
--- a/src/main/java/org/bukkit/CoalType.java
+++ b/src/main/java/org/bukkit/CoalType.java
@@ -7,6 +7,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents the two types of coal
  */
+@Deprecated // Paper
 public enum CoalType {
     COAL(0x0),
     CHARCOAL(0x1);
diff --git a/src/main/java/org/bukkit/CropState.java b/src/main/java/org/bukkit/CropState.java
index fb4832fb796a38c0f5f51cf80a67259924f2c607..519deeeb86672fd75ae62026f956727d01f78fef 100644
--- a/src/main/java/org/bukkit/CropState.java
+++ b/src/main/java/org/bukkit/CropState.java
@@ -7,6 +7,7 @@ import org.jetbrains.annotations.Nullable;
 /**
  * Represents the different growth states of crops
  */
+@Deprecated // Paper
 public enum CropState {
 
     /**
diff --git a/src/main/java/org/bukkit/Difficulty.java b/src/main/java/org/bukkit/Difficulty.java
index 3f6cbefc2b1414ba2dad709e79288013b3ef73be..f35801783538d3377b04131b8bf6effd7eb8e1a5 100644
--- a/src/main/java/org/bukkit/Difficulty.java
+++ b/src/main/java/org/bukkit/Difficulty.java
@@ -44,9 +44,9 @@ public enum Difficulty {
      * Gets the difficulty value associated with this Difficulty.
      *
      * @return An integer value of this difficulty
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public int getValue() {
         return value;
     }
@@ -57,9 +57,9 @@ public enum Difficulty {
      * @param value Value to check
      * @return Associative {@link Difficulty} with the given value, or null if
      *     it doesn't exist
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static Difficulty getByValue(final int value) {
         return BY_ID.get(value);
diff --git a/src/main/java/org/bukkit/DyeColor.java b/src/main/java/org/bukkit/DyeColor.java
index bd213cabddd8752e609544f24cfba95405726155..47df858e095c4423c20e49e029d72f0f50d2c924 100644
--- a/src/main/java/org/bukkit/DyeColor.java
+++ b/src/main/java/org/bukkit/DyeColor.java
@@ -96,9 +96,9 @@ public enum DyeColor {
      *
      * @return A byte containing the wool data value of this color
      * @see #getDyeData()
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public byte getWoolData() {
         return woolData;
     }
@@ -142,9 +142,9 @@ public enum DyeColor {
      * @return The {@link DyeColor} representing the given value, or null if
      *     it doesn't exist
      * @see #getByDyeData(byte)
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static DyeColor getByWoolData(final byte data) {
         int i = 0xff & data;
@@ -202,9 +202,9 @@ public enum DyeColor {
      *
      * @param name dye name
      * @return dye color
-     * @deprecated legacy use only
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @NotNull
     public static DyeColor legacyValueOf(@Nullable String name) {
         return "SILVER".equals(name) ? DyeColor.LIGHT_GRAY : DyeColor.valueOf(name);
diff --git a/src/main/java/org/bukkit/Effect.java b/src/main/java/org/bukkit/Effect.java
index 0d0777771485a76d960da2f16e963b19d2cf6c2d..fd9cf25f2fdef5ee3b7143f27e5f43dfe3f21a38 100644
--- a/src/main/java/org/bukkit/Effect.java
+++ b/src/main/java/org/bukkit/Effect.java
@@ -357,9 +357,9 @@ public enum Effect {
      * Gets the ID for this effect.
      *
      * @return ID of this effect
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public int getId() {
         return this.id;
     }
@@ -386,9 +386,9 @@ public enum Effect {
      *
      * @param id ID of the Effect to return
      * @return Effect with the given ID
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static Effect getById(int id) {
         return BY_ID.get(id);
diff --git a/src/main/java/org/bukkit/EntityEffect.java b/src/main/java/org/bukkit/EntityEffect.java
index 9db85b2f6ffd56bbc4db1f75f8769f1c15d5950f..5341957b10cccd7bce5a7595699b1d90412a01d0 100644
--- a/src/main/java/org/bukkit/EntityEffect.java
+++ b/src/main/java/org/bukkit/EntityEffect.java
@@ -345,9 +345,9 @@ public enum EntityEffect {
      * Gets the data value of this EntityEffect, may not be unique.
      *
      * @return The data value
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public byte getData() {
         return data;
     }
diff --git a/src/main/java/org/bukkit/GameMode.java b/src/main/java/org/bukkit/GameMode.java
index 938c3217f92e6d3ef9a637269c469f8359af6347..81e45984a88fc84acd0f76d825abf4ddaed0ac3b 100644
--- a/src/main/java/org/bukkit/GameMode.java
+++ b/src/main/java/org/bukkit/GameMode.java
@@ -44,9 +44,9 @@ public enum GameMode {
      * Gets the mode value associated with this GameMode
      *
      * @return An integer value of this gamemode
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public int getValue() {
         return value;
     }
@@ -57,9 +57,9 @@ public enum GameMode {
      * @param value Value to check
      * @return Associative {@link GameMode} with the given value, or null if
      *     it doesn't exist
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static GameMode getByValue(final int value) {
         return BY_ID.get(value);
diff --git a/src/main/java/org/bukkit/GrassSpecies.java b/src/main/java/org/bukkit/GrassSpecies.java
index f9c9ae463aacd593e3aa9caf037ea1e23d56c780..f8ae143acbf586d5279b44f7311ca97f3ae4ead2 100644
--- a/src/main/java/org/bukkit/GrassSpecies.java
+++ b/src/main/java/org/bukkit/GrassSpecies.java
@@ -6,7 +6,9 @@ import org.jetbrains.annotations.Nullable;
 
 /**
  * Represents the different types of grass.
+ * @deprecated use {@link org.bukkit.block.data.BlockData}
  */
+@Deprecated // Paper
 public enum GrassSpecies {
 
     /**
diff --git a/src/main/java/org/bukkit/Location.java b/src/main/java/org/bukkit/Location.java
index c30600666e7b32b8b4ba1e20ede04fd5ebd5a692..eec6c9cd7da6938351905129bb5a66f49a257d01 100644
--- a/src/main/java/org/bukkit/Location.java
+++ b/src/main/java/org/bukkit/Location.java
@@ -46,7 +46,7 @@ public class Location implements Cloneable, ConfigurationSerializable, io.paperm
      * @param y The y-coordinate of this new location
      * @param z The z-coordinate of this new location
      */
-    public Location(@Nullable final World world, final double x, final double y, final double z) {
+    public Location(@UndefinedNullability final World world, final double x, final double y, final double z) { // Paper
         this(world, x, y, z, 0, 0);
     }
 
@@ -60,7 +60,7 @@ public class Location implements Cloneable, ConfigurationSerializable, io.paperm
      * @param yaw The absolute rotation on the x-plane, in degrees
      * @param pitch The absolute rotation on the y-plane, in degrees
      */
-    public Location(@Nullable final World world, final double x, final double y, final double z, final float yaw, final float pitch) {
+    public Location(@UndefinedNullability final World world, final double x, final double y, final double z, final float yaw, final float pitch) { // Paper
         if (world != null) {
             this.world = new WeakReference<>(world);
         }
@@ -102,7 +102,7 @@ public class Location implements Cloneable, ConfigurationSerializable, io.paperm
      * @throws IllegalArgumentException when world is unloaded
      * @see #isWorldLoaded()
      */
-    @Nullable
+    @UndefinedNullability // Paper
     public World getWorld() {
         if (this.world == null) {
             return null;
diff --git a/src/main/java/org/bukkit/Material.java b/src/main/java/org/bukkit/Material.java
index 6ffed5ef4331498ff318ffc5850f8b9a0b85eba7..444406eb7f0c3cd13039bf809254e480ee6fa24f 100644
--- a/src/main/java/org/bukkit/Material.java
+++ b/src/main/java/org/bukkit/Material.java
@@ -4681,20 +4681,20 @@ public enum Material implements Keyed, Translatable {
      * Do not use for any reason.
      *
      * @return ID of this material
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @ApiStatus.Internal // Paper
     public int getId() {
         Preconditions.checkArgument(legacy, "Cannot get ID of Modern Material");
         return id;
     }
 
     /**
-     * Do not use for any reason.
+     * Checks if this constant is a legacy material.
      *
      * @return legacy status
      */
-    @Deprecated
+    // @Deprecated // Paper - this is useful, don't deprecate
     public boolean isLegacy() {
         return legacy;
     }
@@ -4770,8 +4770,10 @@ public enum Material implements Keyed, Translatable {
      * Gets the MaterialData class associated with this Material
      *
      * @return MaterialData associated with this Material
+     * @deprecated use {@link #createBlockData()}
      */
     @NotNull
+    @Deprecated // Paper
     public Class<? extends MaterialData> getData() {
         Preconditions.checkArgument(legacy, "Cannot get data class of Modern Material");
         return ctor.getDeclaringClass();
@@ -5227,7 +5229,11 @@ public enum Material implements Keyed, Translatable {
      * material.
      *
      * @return true if this material can be interacted with.
+     * @deprecated This method is not comprehensive and does not accurately reflect what block types are
+     * interactable. Many "interactions" are defined on the item not block, and many are conditional on some other world state
+     * checks being true.
      */
+    @Deprecated // Paper
     public boolean isInteractable() {
         BlockType type = asBlockType();
         return type != null && type.isInteractable();
diff --git a/src/main/java/org/bukkit/NamespacedKey.java b/src/main/java/org/bukkit/NamespacedKey.java
index 9b61129c3ef83d0bfceba54aba2effa12bc90678..cbdaa121dbc1876d0cd55f4b7b57f283ecaa8f1a 100644
--- a/src/main/java/org/bukkit/NamespacedKey.java
+++ b/src/main/java/org/bukkit/NamespacedKey.java
@@ -74,12 +74,14 @@ public final class NamespacedKey implements net.kyori.adventure.key.Key { // Pap
 
     /**
      * Create a key in a specific namespace.
+     * <p>
+     * For most plugin related code, you should prefer using the
+     * {@link NamespacedKey#NamespacedKey(Plugin, String)} constructor.
      *
      * @param namespace namespace
      * @param key key
-     * @apiNote should never be used by plugins, for internal use only!!
+     * @see #NamespacedKey(Plugin, String)
      */
-    @ApiStatus.Internal
     public NamespacedKey(@NotNull String namespace, @NotNull String key) {
         Preconditions.checkArgument(namespace != null && isValidNamespace(namespace), "Invalid namespace. Must be [a-z0-9._-]: %s", namespace);
         Preconditions.checkArgument(key != null && isValidKey(key), "Invalid key. Must be [a-z0-9/._-]: %s", key);
diff --git a/src/main/java/org/bukkit/NetherWartsState.java b/src/main/java/org/bukkit/NetherWartsState.java
index f43209cf7b752c26718c303ca8c3e1c7d9912ad3..f0094e6fb05e526736629ad3181c8d2c16ba6ca4 100644
--- a/src/main/java/org/bukkit/NetherWartsState.java
+++ b/src/main/java/org/bukkit/NetherWartsState.java
@@ -1,5 +1,11 @@
 package org.bukkit;
 
+// Paper start
+/**
+ * @deprecated use {@link org.bukkit.block.data.BlockData} and {@link org.bukkit.block.data.Ageable}
+ */
+@Deprecated
+// Paper end
 public enum NetherWartsState {
 
     /**
diff --git a/src/main/java/org/bukkit/Note.java b/src/main/java/org/bukkit/Note.java
index 48aecc9421c500137bbef1dfe3bec8de277c3ff9..aff858346776386f1288b648b221404f7f412399 100644
--- a/src/main/java/org/bukkit/Note.java
+++ b/src/main/java/org/bukkit/Note.java
@@ -39,9 +39,9 @@ public class Note {
          * Returns the not sharped id of this tone.
          *
          * @return the not sharped id of this tone.
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public byte getId() {
             return getId(false);
         }
@@ -53,9 +53,9 @@ public class Note {
          *
          * @param sharped Set to true to return the sharped id.
          * @return the id of this tone.
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public byte getId(boolean sharped) {
             byte id = (byte) (sharped && sharpable ? this.id + 1 : this.id);
 
@@ -78,9 +78,9 @@ public class Note {
          * @return if the tone id is the sharped id of the tone.
          * @throws IllegalArgumentException if neither the tone nor the
          *     semitone have the id.
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public boolean isSharped(byte id) {
             if (id == getId(false)) {
                 return false;
@@ -97,9 +97,9 @@ public class Note {
          *
          * @param id the id of the tone.
          * @return the tone to id.
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         @Nullable
         public static Tone getById(byte id) {
             return BY_DATA.get(id);
@@ -222,9 +222,9 @@ public class Note {
      * Returns the internal id of this note.
      *
      * @return the internal id of this note.
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public byte getId() {
         return note;
     }
diff --git a/src/main/java/org/bukkit/Registry.java b/src/main/java/org/bukkit/Registry.java
index f1a7f3b3e20963fa9d97bcc0686a35863de2b60f..3effaea369d9c7a6a22979fbfc270f55f9f25cf2 100644
--- a/src/main/java/org/bukkit/Registry.java
+++ b/src/main/java/org/bukkit/Registry.java
@@ -220,14 +220,12 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
      *
      * @see TrimMaterial
      */
-    @ApiStatus.Experimental
     Registry<TrimMaterial> TRIM_MATERIAL = Bukkit.getRegistry(TrimMaterial.class);
     /**
      * Trim patterns.
      *
      * @see TrimPattern
      */
-    @ApiStatus.Experimental
     Registry<TrimPattern> TRIM_PATTERN = Bukkit.getRegistry(TrimPattern.class);
     /**
      * Damage types.
@@ -336,8 +334,11 @@ public interface Registry<T extends Keyed> extends Iterable<T> {
      *
      * @param input non-null input
      * @return registered object or null if does not exist
+     * @deprecated this method's behavior is broken and not useful. If you want to get an object
+     * based on its vanilla name, or a key, wrap it in a {@link NamespacedKey} object and use {@link #get(NamespacedKey)}
      */
     @Nullable
+    @Deprecated(forRemoval = true) // Paper
     default T match(@NotNull String input) {
         Preconditions.checkArgument(input != null, "input must not be null");
 
diff --git a/src/main/java/org/bukkit/SandstoneType.java b/src/main/java/org/bukkit/SandstoneType.java
index 6277451c3c6c551078c237cd767b6d70c4f585ea..10f5cfb1885833a1d2c1027c03974da45ab28e2f 100644
--- a/src/main/java/org/bukkit/SandstoneType.java
+++ b/src/main/java/org/bukkit/SandstoneType.java
@@ -6,7 +6,9 @@ import org.jetbrains.annotations.Nullable;
 
 /**
  * Represents the three different types of Sandstone
+ * @deprecated use {@link org.bukkit.block.data.BlockData}
  */
+@Deprecated // Paper
 public enum SandstoneType {
     CRACKED(0x0),
     GLYPHED(0x1),
diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
index c1a1baa2c79ad48b210e770f198ca9a2d7815df4..75b3295a5544626d28c57b317d95db90722de719 100644
--- a/src/main/java/org/bukkit/Server.java
+++ b/src/main/java/org/bukkit/Server.java
@@ -741,9 +741,8 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
      *
      * @param id the id of the map to get
      * @return a map view if it exists, or null otherwise
-     * @deprecated Magic value
      */
-    @Deprecated
+    //@Deprecated // Paper - Not a magic value
     @Nullable
     public MapView getMap(int id);
 
@@ -810,8 +809,14 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
      * Returns the primary logger associated with this server instance.
      *
      * @return Logger associated with this server
+     * @see org.bukkit.plugin.Plugin#getSLF4JLogger()
+     * @apiNote This logger is for the Minecraft server software, not for specific plugins. You should
+     * use a logger for a specific plugin, either via {@link org.bukkit.plugin.Plugin#getSLF4JLogger()}
+     * or {@link org.bukkit.plugin.Plugin#getLogger()} or create a specific logger for a class via slf4j.
+     * That way, log messages contain contextual information about the source of the message.
      */
     @NotNull
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper - internalize Bukkit#getLogger
     public Logger getLogger();
 
     /**
@@ -1148,10 +1153,8 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
      * @param name the name the player to retrieve
      * @return an offline player
      * @see #getOfflinePlayer(java.util.UUID)
-     * @deprecated Persistent storage of users should be by UUID as names are no longer
-     *             unique past a single session.
      */
-    @Deprecated
+    // @Deprecated // Paper
     @NotNull
     public OfflinePlayer getOfflinePlayer(@NotNull String name);
 
@@ -1669,7 +1672,7 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
      *
      * @return the scoreboard manager or null if no worlds are loaded.
      */
-    @Nullable
+    @NotNull // Paper
     ScoreboardManager getScoreboardManager();
 
     /**
diff --git a/src/main/java/org/bukkit/UndefinedNullability.java b/src/main/java/org/bukkit/UndefinedNullability.java
index 4d4265c237179470e1fd017721a8dd595f114013..3babc9df26276300392d3f92ee6e317c33643b0b 100644
--- a/src/main/java/org/bukkit/UndefinedNullability.java
+++ b/src/main/java/org/bukkit/UndefinedNullability.java
@@ -14,6 +14,7 @@ import org.jetbrains.annotations.ApiStatus;
  * suggests a bad API design.
  */
 @Retention(RetentionPolicy.CLASS)
+@java.lang.annotation.Documented // Paper
 @ApiStatus.Internal
 @Deprecated
 public @interface UndefinedNullability {
diff --git a/src/main/java/org/bukkit/Vibration.java b/src/main/java/org/bukkit/Vibration.java
index e455eb21abf121dc6ff10ff8a13dd06f67096a8f..bbc01e7c192ae6689c301670047ff114306c57cb 100644
--- a/src/main/java/org/bukkit/Vibration.java
+++ b/src/main/java/org/bukkit/Vibration.java
@@ -13,6 +13,14 @@ public class Vibration {
     private final Destination destination;
     private final int arrivalTime;
 
+    // Paper start
+    public Vibration(@NotNull Destination destination, @NotNull int arrivalTime) {
+        this.destination = destination;
+        this.arrivalTime = arrivalTime;
+        this.origin = new Location(null, 0, 0, 0); // Dummy origin because getter expects null
+    }
+
+    @Deprecated(forRemoval = true) // Paper end
     public Vibration(@NotNull Location origin, @NotNull Destination destination, int arrivalTime) {
         this.origin = origin;
         this.destination = destination;
@@ -22,9 +30,11 @@ public class Vibration {
     /**
      * Get the origin of the vibration.
      *
+     * @deprecated unused as of 1.19
      * @return origin
      */
     @NotNull
+    @Deprecated(forRemoval = true) // Paper
     public Location getOrigin() {
         return origin;
     }
diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
index fcdc5d83621acff5f9210585455be1ea50abb77c..216995288f6b8b407ef8240411b5ed4713379a7a 100644
--- a/src/main/java/org/bukkit/World.java
+++ b/src/main/java/org/bukkit/World.java
@@ -418,9 +418,8 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
      * @param z Z-coordinate of the chunk
      * @return Whether the chunk was actually refreshed
      *
-     * @deprecated This method is not guaranteed to work suitably across all client implementations.
      */
-    @Deprecated
+    //@Deprecated // Paper
     public boolean refreshChunk(int x, int z);
 
     /**
@@ -3797,6 +3796,7 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
     StructureSearchResult locateNearestStructure(@NotNull Location origin, @NotNull Structure structure, int radius, boolean findUnexplored);
 
     // Spigot start
+    @Deprecated(forRemoval = true) // Paper
     public class Spigot {
 
         /**
@@ -3830,7 +3830,11 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
         }
     }
 
+    /**
+     * @deprecated Unsupported api
+     */
     @NotNull
+    @Deprecated // Paper
     Spigot spigot();
     // Spigot end
 
@@ -4048,9 +4052,9 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
          * Gets the dimension ID of this environment
          *
          * @return dimension ID
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public int getId() {
             return id;
         }
@@ -4060,9 +4064,9 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
          *
          * @param id The ID of the environment
          * @return The environment
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         @Nullable
         public static Environment getEnvironment(int id) {
             return lookup.get(id);
diff --git a/src/main/java/org/bukkit/block/Block.java b/src/main/java/org/bukkit/block/Block.java
index bb3cf2c5e2acbcd7cf53ad8551a5b11fa6104ada..e4393f2bd71308a58305cb870271d6a647ffcd92 100644
--- a/src/main/java/org/bukkit/block/Block.java
+++ b/src/main/java/org/bukkit/block/Block.java
@@ -526,7 +526,7 @@ public interface Block extends Metadatable, Translatable {
      * @return a list of dropped items for this type of block
      */
     @NotNull
-    Collection<ItemStack> getDrops(@NotNull ItemStack tool, @Nullable Entity entity);
+    Collection<ItemStack> getDrops(@Nullable ItemStack tool, @Nullable Entity entity); // Paper
 
     /**
      * Returns if the given item is a preferred choice to break this Block.
diff --git a/src/main/java/org/bukkit/block/BlockState.java b/src/main/java/org/bukkit/block/BlockState.java
index 3e07fc1bc0e08d0cfd998711c7fd547b2b7b6b73..fd4a9bdcfb6775dfbdb7492e6c9eb90722d2ecdc 100644
--- a/src/main/java/org/bukkit/block/BlockState.java
+++ b/src/main/java/org/bukkit/block/BlockState.java
@@ -36,8 +36,10 @@ public interface BlockState extends Metadatable {
      * Gets the metadata for this block state.
      *
      * @return block specific metadata
+     * @deprecated use {@link #getBlockData()}
      */
     @NotNull
+    @Deprecated // Paper
     MaterialData getData();
 
     /**
@@ -151,7 +153,9 @@ public interface BlockState extends Metadatable {
      * Sets the metadata for this block state.
      *
      * @param data New block specific metadata
+     * @deprecated use {@link #setBlockData(BlockData)}
      */
+    @Deprecated // Paper
     void setData(@NotNull MaterialData data);
 
     /**
diff --git a/src/main/java/org/bukkit/block/BrushableBlock.java b/src/main/java/org/bukkit/block/BrushableBlock.java
index 4bd127b3646307398e0c937c3e36ab671235b72b..f2557a87f468ee20c2d276dbfc0e9a976656c75c 100644
--- a/src/main/java/org/bukkit/block/BrushableBlock.java
+++ b/src/main/java/org/bukkit/block/BrushableBlock.java
@@ -15,7 +15,7 @@ public interface BrushableBlock extends Lootable, TileState {
      *
      * @return the item
      */
-    @Nullable
+    @org.jetbrains.annotations.NotNull // Paper
     public ItemStack getItem();
 
     /**
diff --git a/src/main/java/org/bukkit/block/PistonMoveReaction.java b/src/main/java/org/bukkit/block/PistonMoveReaction.java
index b90f5dc345ad2cdd3ae353dc57f42a14c231d18a..a7b915ded9154d53ac8ca599119c1699cfca2265 100644
--- a/src/main/java/org/bukkit/block/PistonMoveReaction.java
+++ b/src/main/java/org/bukkit/block/PistonMoveReaction.java
@@ -48,9 +48,9 @@ public enum PistonMoveReaction {
 
     /**
      * @return The ID of the move reaction
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public int getId() {
         return this.id;
     }
@@ -58,9 +58,9 @@ public enum PistonMoveReaction {
     /**
      * @param id An ID
      * @return The move reaction with that ID
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static PistonMoveReaction getById(int id) {
         return byId.get(id);
diff --git a/src/main/java/org/bukkit/enchantments/Enchantment.java b/src/main/java/org/bukkit/enchantments/Enchantment.java
index c7a901707048e9dc82b8f17f3285727460173c72..64675a3641acb50676ca0122f8473ce94de8fba7 100644
--- a/src/main/java/org/bukkit/enchantments/Enchantment.java
+++ b/src/main/java/org/bukkit/enchantments/Enchantment.java
@@ -269,7 +269,7 @@ public abstract class Enchantment implements Keyed, Translatable {
      * @deprecated enchantment groupings are now managed by tags, not categories
      */
     @NotNull
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.5") @org.jetbrains.annotations.Contract("-> fail") // Paper
     public abstract EnchantmentTarget getItemTarget();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/AbstractArrow.java b/src/main/java/org/bukkit/entity/AbstractArrow.java
index 493f81ba879d1eb29a32722da27e4ff7ce4c68a8..8bf9bf7940d2911486e9d3a4f688cfae3f6173f2 100644
--- a/src/main/java/org/bukkit/entity/AbstractArrow.java
+++ b/src/main/java/org/bukkit/entity/AbstractArrow.java
@@ -157,7 +157,7 @@ public interface AbstractArrow extends Projectile {
      *
      * @return The firing ItemStack
      */
-    @NotNull
+    @Nullable // Paper
     @ApiStatus.Experimental
     public ItemStack getWeapon();
 
diff --git a/src/main/java/org/bukkit/entity/Enderman.java b/src/main/java/org/bukkit/entity/Enderman.java
index 3afe2787de576f7190d87c796bea0ab34dc30248..58191017244f3949f6174fb108e3a245738a53c4 100644
--- a/src/main/java/org/bukkit/entity/Enderman.java
+++ b/src/main/java/org/bukkit/entity/Enderman.java
@@ -25,15 +25,19 @@ public interface Enderman extends Monster {
      * Gets the id and data of the block that the Enderman is carrying.
      *
      * @return MaterialData containing the id and data of the block
+     * @deprecated use {@link #getCarriedBlock()}
      */
     @NotNull
+    @Deprecated // Paper
     public MaterialData getCarriedMaterial();
 
     /**
      * Sets the id and data of the block that the Enderman is carrying.
      *
      * @param material data to set the carried block to
+     * @deprecated use {@link #setCarriedBlock(BlockData)}
      */
+    @Deprecated // Paper
     public void setCarriedMaterial(@NotNull MaterialData material);
 
     /**
diff --git a/src/main/java/org/bukkit/entity/EntityType.java b/src/main/java/org/bukkit/entity/EntityType.java
index 4047f026ab796eca7ad2d6718e1436f251c08e93..d248069adfc67eb840951f7ab4a1fa5d30214dec 100644
--- a/src/main/java/org/bukkit/entity/EntityType.java
+++ b/src/main/java/org/bukkit/entity/EntityType.java
@@ -381,9 +381,9 @@ public enum EntityType implements Keyed, Translatable {
      *
      * @param name the entity type's name
      * @return the matching entity type or null
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Contract("null -> null")
     @Nullable
     public static EntityType fromName(@Nullable String name) {
diff --git a/src/main/java/org/bukkit/entity/ItemDisplay.java b/src/main/java/org/bukkit/entity/ItemDisplay.java
index bd718c1cf6f20cd716d2fac11556437b4a5aab2e..586ac8abbd1a0f2724fdfadc01370cb6f1c1067a 100644
--- a/src/main/java/org/bukkit/entity/ItemDisplay.java
+++ b/src/main/java/org/bukkit/entity/ItemDisplay.java
@@ -14,7 +14,7 @@ public interface ItemDisplay extends Display {
      *
      * @return the displayed item stack
      */
-    @Nullable
+    @NotNull // Paper
     ItemStack getItemStack();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/LightningStrike.java b/src/main/java/org/bukkit/entity/LightningStrike.java
index b27447d7a2833f84cf05946c851f5b6740a578e3..5afeb2f6c82e8f752229462c2d7846f6ae7a4b44 100644
--- a/src/main/java/org/bukkit/entity/LightningStrike.java
+++ b/src/main/java/org/bukkit/entity/LightningStrike.java
@@ -84,6 +84,10 @@ public interface LightningStrike extends Entity {
     public void setCausingPlayer(@Nullable Player player);
 
     // Spigot start
+    /**
+     * @deprecated Unsupported api
+     */
+    @Deprecated // Paper
     public class Spigot extends Entity.Spigot {
 
         /**
@@ -98,8 +102,12 @@ public interface LightningStrike extends Entity {
         }
     }
 
+    /**
+     * @deprecated Unsupported api
+     */
     @NotNull
     @Override
+    @Deprecated // Paper
     Spigot spigot();
     // Spigot end
 }
diff --git a/src/main/java/org/bukkit/entity/LingeringPotion.java b/src/main/java/org/bukkit/entity/LingeringPotion.java
index bafef53c1d449135f1300c8c8fbb06f482ba67e1..f50aaddf8582be55fd4860ad374d8f2206991897 100644
--- a/src/main/java/org/bukkit/entity/LingeringPotion.java
+++ b/src/main/java/org/bukkit/entity/LingeringPotion.java
@@ -3,7 +3,8 @@ package org.bukkit.entity;
 /**
  * Represents a thrown lingering potion bottle
  *
- * @deprecated lingering status depends on only on the potion item.
+ * @deprecated should not be used for anything, use {@link ThrownPotion} and
+ * set the potion via the methods there.
  */
-@Deprecated
+@Deprecated(forRemoval = true) // Paper
 public interface LingeringPotion extends ThrownPotion { }
diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java
index b5ea7b60b47f056553a1cec766c57e0f75735633..ec35111df4b38fd55cc34f4baedebcf39c7fc92b 100644
--- a/src/main/java/org/bukkit/entity/LivingEntity.java
+++ b/src/main/java/org/bukkit/entity/LivingEntity.java
@@ -716,7 +716,9 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
      * This may have unexpected results if the entity is not in water.
      *
      * @param swimming True if the entity is swimming.
+     * @deprecated This does nothing and is immediately reverted by the server, in the next tick <!-- Paper - future note: should wait a mojang input client/server side -->
      */
+    @Deprecated // Paper
     public void setSwimming(boolean swimming);
 
     /**
@@ -971,7 +973,7 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
      * @deprecated entity groupings are now managed by tags, not categories
      */
     @NotNull
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.5") @org.jetbrains.annotations.Contract("-> fail") // Paper
     public EntityCategory getCategory();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/Minecart.java b/src/main/java/org/bukkit/entity/Minecart.java
index 95c79c5fa0c4e30201f887da6467ce5f81c8a255..7f9c4d4b430a3f0276461346ff2621bacf864075 100644
--- a/src/main/java/org/bukkit/entity/Minecart.java
+++ b/src/main/java/org/bukkit/entity/Minecart.java
@@ -101,7 +101,9 @@ public interface Minecart extends Vehicle {
      * Passing a null value will set the minecart to have no display block.
      *
      * @param material the material to set as display block.
+     * @deprecated use {@link #setDisplayBlockData(BlockData)}
      */
+    @Deprecated // Paper
     public void setDisplayBlock(@Nullable MaterialData material);
 
     /**
@@ -109,8 +111,10 @@ public interface Minecart extends Vehicle {
      * This function will return the type AIR if none is set.
      *
      * @return the block displayed by this minecart.
+     * @deprecated use {@link #getDisplayBlockData()}
      */
     @NotNull
+    @Deprecated // Paper
     public MaterialData getDisplayBlock();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/OminousItemSpawner.java b/src/main/java/org/bukkit/entity/OminousItemSpawner.java
index 60522888bc320ba0a55655532e19185fac816bd1..4aa07d4edb2c81d0ae7999b30ad53ff8bb884ec7 100644
--- a/src/main/java/org/bukkit/entity/OminousItemSpawner.java
+++ b/src/main/java/org/bukkit/entity/OminousItemSpawner.java
@@ -15,7 +15,7 @@ public interface OminousItemSpawner extends Entity {
      *
      * @return the item
      */
-    @Nullable
+    @org.jetbrains.annotations.NotNull // Paper
     ItemStack getItem();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
index dc9829ab0f4efcf9534f1b2d4a2e48ea49e8d372..e65f4f0df2e6832cf089572822c96ecc7a83dab3 100644
--- a/src/main/java/org/bukkit/entity/Player.java
+++ b/src/main/java/org/bukkit/entity/Player.java
@@ -1640,11 +1640,8 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
 
     /**
      * Forces an update of the player's entire inventory.
-     *
-     * @apiNote It should not be necessary for plugins to use this method. If it
-     * is required for some reason, it is probably a bug.
      */
-    @ApiStatus.Internal
+    // @ApiStatus.Internal // Paper - is valid API
     public void updateInventory();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/Projectile.java b/src/main/java/org/bukkit/entity/Projectile.java
index 906b33b7569fff5dd78258f9765e879180a52834..06e3ad9cd8f39de0ef6ead794df1492415bc4302 100644
--- a/src/main/java/org/bukkit/entity/Projectile.java
+++ b/src/main/java/org/bukkit/entity/Projectile.java
@@ -29,7 +29,7 @@ public interface Projectile extends Entity {
      * @return true if it should bounce.
      * @deprecated does not do anything
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     public boolean doesBounce();
 
     /**
@@ -39,6 +39,6 @@ public interface Projectile extends Entity {
      * @param doesBounce whether or not it should bounce.
      * @deprecated does not do anything
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     public void setBounce(boolean doesBounce);
 }
diff --git a/src/main/java/org/bukkit/entity/SplashPotion.java b/src/main/java/org/bukkit/entity/SplashPotion.java
index 9cb08fe7201a9f91e88c7b1ee22c17889a7bf1c3..c0fcfccdf476106b48e626a099658c04244ebff8 100644
--- a/src/main/java/org/bukkit/entity/SplashPotion.java
+++ b/src/main/java/org/bukkit/entity/SplashPotion.java
@@ -3,7 +3,8 @@ package org.bukkit.entity;
 /**
  * Represents a thrown splash potion bottle
  *
- * @deprecated splash status depends on only on the potion item.
+ * @deprecated should not be used for anything, use {@link ThrownPotion} and
+ * set the potion via the methods there.
  */
-@Deprecated
+@Deprecated(forRemoval = true) // Paper
 public interface SplashPotion extends ThrownPotion { }
diff --git a/src/main/java/org/bukkit/entity/ZombieVillager.java b/src/main/java/org/bukkit/entity/ZombieVillager.java
index 7cc1d9a966454af70b7c25735fe474fe3eb97eb4..e38f38ebfc6e85f29b09c4bb3e2ea79639078ad0 100644
--- a/src/main/java/org/bukkit/entity/ZombieVillager.java
+++ b/src/main/java/org/bukkit/entity/ZombieVillager.java
@@ -13,15 +13,15 @@ public interface ZombieVillager extends Zombie {
      * Sets the villager profession of this zombie.
      */
     @Override
-    void setVillagerProfession(@Nullable Villager.Profession profession);
+    void setVillagerProfession(@NotNull Villager.Profession profession); // Paper
 
     /**
      * Returns the villager profession of this zombie.
      *
-     * @return the profession or null
+     * @return the profession
      */
     @Override
-    @Nullable
+    @NotNull // Paper
     Villager.Profession getVillagerProfession();
 
     /**
diff --git a/src/main/java/org/bukkit/entity/memory/MemoryKey.java b/src/main/java/org/bukkit/entity/memory/MemoryKey.java
index 8f601e85df580ef8106eaff8b9eafb5691a4874b..d615c006c9153fb65024241604b744fbfc383efc 100644
--- a/src/main/java/org/bukkit/entity/memory/MemoryKey.java
+++ b/src/main/java/org/bukkit/entity/memory/MemoryKey.java
@@ -69,6 +69,12 @@ public final class MemoryKey<T> implements Keyed {
     public static final MemoryKey<Location> LIKED_NOTEBLOCK_POSITION = new MemoryKey<>(NamespacedKey.minecraft("liked_noteblock"), Location.class);
     public static final MemoryKey<Integer> LIKED_NOTEBLOCK_COOLDOWN_TICKS = new MemoryKey<>(NamespacedKey.minecraft("liked_noteblock_cooldown_ticks"), Integer.class);
     public static final MemoryKey<Integer> ITEM_PICKUP_COOLDOWN_TICKS = new MemoryKey<>(NamespacedKey.minecraft("item_pickup_cooldown_ticks"), Integer.class);
+    /**
+     * @deprecated this constant uses the wrong generic type, the sniffer now stores different positions
+     * from possibly different worlds. Use the relevant methods in {@link org.bukkit.entity.Sniffer} directly
+     * for now.
+     */
+    @Deprecated // Paper
     public static final MemoryKey<Location> SNIFFER_EXPLORED_POSITIONS = new MemoryKey<>(NamespacedKey.minecraft("sniffer_explored_positions"), Location.class);
 
     /**
diff --git a/src/main/java/org/bukkit/event/block/BrewingStartEvent.java b/src/main/java/org/bukkit/event/block/BrewingStartEvent.java
index 9e54ef5b60bf5583c12e1edfa76f19013a5b2a65..37be83184cae203d5e99518b0ff5c708fafb0331 100644
--- a/src/main/java/org/bukkit/event/block/BrewingStartEvent.java
+++ b/src/main/java/org/bukkit/event/block/BrewingStartEvent.java
@@ -8,6 +8,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Called when a brewing stand starts to brew.
  */
+@org.jetbrains.annotations.ApiStatus.Experimental // Paper
 public class BrewingStartEvent extends InventoryBlockStartEvent {
 
     private static final HandlerList handlers = new HandlerList();
diff --git a/src/main/java/org/bukkit/event/block/CampfireStartEvent.java b/src/main/java/org/bukkit/event/block/CampfireStartEvent.java
index 53119742beda00a38111063243665bb995ae2188..2d084214e991fecc51f8e18e3d733e43b1dca248 100644
--- a/src/main/java/org/bukkit/event/block/CampfireStartEvent.java
+++ b/src/main/java/org/bukkit/event/block/CampfireStartEvent.java
@@ -9,6 +9,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Called when a Campfire starts to cook.
  */
+@org.jetbrains.annotations.ApiStatus.Experimental // Paper
 public class CampfireStartEvent extends InventoryBlockStartEvent {
 
     private static final HandlerList handlers = new HandlerList();
diff --git a/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java b/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java
index f2edd4a9357832e9dec3fb0aafa006335d7b289b..f05ce4fd6c4bbd79edc5f65e7edd1e4a63e93fb8 100644
--- a/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java
+++ b/src/main/java/org/bukkit/event/enchantment/PrepareItemEnchantEvent.java
@@ -23,7 +23,7 @@ public class PrepareItemEnchantEvent extends InventoryEvent implements Cancellab
     private boolean cancelled;
     private final Player enchanter;
 
-    public PrepareItemEnchantEvent(@NotNull final Player enchanter, @NotNull InventoryView view, @NotNull final Block table, @NotNull final ItemStack item, @NotNull final EnchantmentOffer[] offers, final int bonus) {
+    public PrepareItemEnchantEvent(@NotNull final Player enchanter, @NotNull InventoryView view, @NotNull final Block table, @NotNull final ItemStack item, @org.jetbrains.annotations.Nullable final EnchantmentOffer @NotNull [] offers, final int bonus) { // Paper - offers can contain null values
         super(view);
         this.enchanter = enchanter;
         this.table = table;
@@ -86,8 +86,7 @@ public class PrepareItemEnchantEvent extends InventoryEvent implements Cancellab
      *
      * @return list of available enchantment offers
      */
-    @NotNull
-    public EnchantmentOffer[] getOffers() {
+    public @org.jetbrains.annotations.Nullable EnchantmentOffer @NotNull [] getOffers() { // Paper offers can contain null values
         return offers;
     }
 
diff --git a/src/main/java/org/bukkit/event/entity/EntityPotionEffectEvent.java b/src/main/java/org/bukkit/event/entity/EntityPotionEffectEvent.java
index c9f395064656dd0126410eb3c6e197baa450c063..c95943a0c6a2cc7685b0e2601460d92fa1b4b2f5 100644
--- a/src/main/java/org/bukkit/event/entity/EntityPotionEffectEvent.java
+++ b/src/main/java/org/bukkit/event/entity/EntityPotionEffectEvent.java
@@ -219,7 +219,10 @@ public class EntityPotionEffectEvent extends EntityEvent implements Cancellable
         MILK,
         /**
          * When a player gets bad omen after killing a patrol captain.
+         *
+         * @deprecated no longer used, player now gets an ominous bottle instead
          */
+        @Deprecated(since = "1.21") // Paper
         PATROL_CAPTAIN,
         /**
          * When a potion effect is modified through the plugin methods.
diff --git a/src/main/java/org/bukkit/event/entity/EntityTargetLivingEntityEvent.java b/src/main/java/org/bukkit/event/entity/EntityTargetLivingEntityEvent.java
index 090ec6f96ca9b7f760389994da988c44c32b9976..e6b4d4c1722bf4a11744a421d09646b22745b138 100644
--- a/src/main/java/org/bukkit/event/entity/EntityTargetLivingEntityEvent.java
+++ b/src/main/java/org/bukkit/event/entity/EntityTargetLivingEntityEvent.java
@@ -10,7 +10,7 @@ import org.jetbrains.annotations.Nullable;
  * LivingEntity's.
  */
 public class EntityTargetLivingEntityEvent extends EntityTargetEvent {
-    public EntityTargetLivingEntityEvent(@NotNull final Entity entity, @Nullable final LivingEntity target, @Nullable final TargetReason reason) {
+    public EntityTargetLivingEntityEvent(@NotNull final Entity entity, @Nullable final LivingEntity target, @NotNull final TargetReason reason) { // Paper
         super(entity, target, reason);
     }
 
diff --git a/src/main/java/org/bukkit/event/entity/EntityToggleSwimEvent.java b/src/main/java/org/bukkit/event/entity/EntityToggleSwimEvent.java
index e1123295b9511a2c610a1baf7195638f7f3e64c4..273ae8e5da0a858d3b82d1b0f5992318ff49f145 100644
--- a/src/main/java/org/bukkit/event/entity/EntityToggleSwimEvent.java
+++ b/src/main/java/org/bukkit/event/entity/EntityToggleSwimEvent.java
@@ -24,6 +24,14 @@ public class EntityToggleSwimEvent extends EntityEvent implements Cancellable {
         return cancel;
     }
 
+    /**
+     * @deprecated This does nothing, the server and the client doesn't work
+     * correctly when the server try to bypass this. A current workaround
+     * exists. If you want to cancel the switch from the ground state to the
+     * swimming state you need to disable the sprinting flag for the player after
+     * the cancel action.
+     */
+    @Deprecated // Paper
     @Override
     public void setCancelled(boolean cancel) {
         this.cancel = cancel;
diff --git a/src/main/java/org/bukkit/event/entity/ProjectileHitEvent.java b/src/main/java/org/bukkit/event/entity/ProjectileHitEvent.java
index 56e6024f1fa64569481543dc076e575bb512eef0..7fccda2a48f7bac7da54862c5cb8f1b484cc9da9 100644
--- a/src/main/java/org/bukkit/event/entity/ProjectileHitEvent.java
+++ b/src/main/java/org/bukkit/event/entity/ProjectileHitEvent.java
@@ -19,22 +19,27 @@ public class ProjectileHitEvent extends EntityEvent implements Cancellable {
     private final BlockFace hitFace;
     private boolean cancel = false;
 
+    @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
     public ProjectileHitEvent(@NotNull final Projectile projectile) {
-        this(projectile, null, null);
+        this(projectile, null, null, null); // Paper
     }
 
+    @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
     public ProjectileHitEvent(@NotNull final Projectile projectile, @Nullable Entity hitEntity) {
-        this(projectile, hitEntity, null);
+        this(projectile, hitEntity, null, null); // Paper
     }
 
+    @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
     public ProjectileHitEvent(@NotNull final Projectile projectile, @Nullable Block hitBlock) {
-        this(projectile, null, hitBlock);
+        this(projectile, null, hitBlock, null); // Paper
     }
 
+    @Deprecated @io.papermc.paper.annotation.DoNotUse // Paper
     public ProjectileHitEvent(@NotNull final Projectile projectile, @Nullable Entity hitEntity, @Nullable Block hitBlock) {
         this(projectile, hitEntity, hitBlock, null);
     }
 
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public ProjectileHitEvent(@NotNull final Projectile projectile, @Nullable Entity hitEntity, @Nullable Block hitBlock, @Nullable BlockFace hitFace) {
         super(projectile);
         this.hitEntity = hitEntity;
diff --git a/src/main/java/org/bukkit/event/entity/SpawnerSpawnEvent.java b/src/main/java/org/bukkit/event/entity/SpawnerSpawnEvent.java
index 9353f0d09272404f42167ab8b7ad83a03620c436..f3ec8f67328b266defb31a44a36d31401d5e9371 100644
--- a/src/main/java/org/bukkit/event/entity/SpawnerSpawnEvent.java
+++ b/src/main/java/org/bukkit/event/entity/SpawnerSpawnEvent.java
@@ -12,12 +12,19 @@ import org.jetbrains.annotations.NotNull;
 public class SpawnerSpawnEvent extends EntitySpawnEvent {
     private final CreatureSpawner spawner;
 
-    public SpawnerSpawnEvent(@NotNull final Entity spawnee, @NotNull final CreatureSpawner spawner) {
+    public SpawnerSpawnEvent(@NotNull final Entity spawnee, @org.jetbrains.annotations.Nullable final CreatureSpawner spawner) { // Paper
         super(spawnee);
         this.spawner = spawner;
     }
 
-    @NotNull
+    /**
+     * Gets the spawner tile state, or null
+     * when the entity is spawned from a minecart
+     * spawner.
+     *
+     * @return the spawner tile state
+     */
+    @org.jetbrains.annotations.Nullable // Paper
     public CreatureSpawner getSpawner() {
         return spawner;
     }
diff --git a/src/main/java/org/bukkit/event/hanging/HangingBreakByEntityEvent.java b/src/main/java/org/bukkit/event/hanging/HangingBreakByEntityEvent.java
index 68517811f63838bdad41073ee26be82f95042a8e..454885e47611edd707358ddfe0a01b7acf9ad5c8 100644
--- a/src/main/java/org/bukkit/event/hanging/HangingBreakByEntityEvent.java
+++ b/src/main/java/org/bukkit/event/hanging/HangingBreakByEntityEvent.java
@@ -11,22 +11,21 @@ import org.jetbrains.annotations.Nullable;
 public class HangingBreakByEntityEvent extends HangingBreakEvent {
     private final Entity remover;
 
-    public HangingBreakByEntityEvent(@NotNull final Hanging hanging, @Nullable final Entity remover) {
+    public HangingBreakByEntityEvent(@NotNull final Hanging hanging, @NotNull final Entity remover) { // Paper
         this(hanging, remover, HangingBreakEvent.RemoveCause.ENTITY);
     }
 
-    public HangingBreakByEntityEvent(@NotNull final Hanging hanging, @Nullable final Entity remover, @NotNull final HangingBreakEvent.RemoveCause cause) {
+    public HangingBreakByEntityEvent(@NotNull final Hanging hanging, @NotNull final Entity remover, @NotNull final HangingBreakEvent.RemoveCause cause) { // Paper
         super(hanging, cause);
         this.remover = remover;
     }
 
     /**
      * Gets the entity that removed the hanging entity.
-     * May be null, for example when broken by an explosion.
      *
      * @return the entity that removed the hanging entity
      */
-    @Nullable
+    @NotNull // Paper
     public Entity getRemover() {
         return remover;
     }
diff --git a/src/main/java/org/bukkit/event/inventory/HopperInventorySearchEvent.java b/src/main/java/org/bukkit/event/inventory/HopperInventorySearchEvent.java
index 80a0a4ad813d6453b30273d25942e6612bb05c1b..18bb808e73c7a78f367ccdb44d5fe12bc54672cb 100644
--- a/src/main/java/org/bukkit/event/inventory/HopperInventorySearchEvent.java
+++ b/src/main/java/org/bukkit/event/inventory/HopperInventorySearchEvent.java
@@ -34,7 +34,7 @@ public class HopperInventorySearchEvent extends BlockEvent {
         DESTINATION;
     }
 
-    public HopperInventorySearchEvent(@NotNull Inventory inventory, @NotNull ContainerType containerType, @NotNull Block hopper, @NotNull Block searchBlock) {
+    public HopperInventorySearchEvent(@Nullable Inventory inventory, @NotNull ContainerType containerType, @NotNull Block hopper, @NotNull Block searchBlock) { // Paper
         super(hopper);
         this.inventory = inventory;
         this.containerType = containerType;
diff --git a/src/main/java/org/bukkit/event/inventory/InventoryClickEvent.java b/src/main/java/org/bukkit/event/inventory/InventoryClickEvent.java
index f2a2a2ad9930499c5bf624e73571a3294a90db14..c8540a42ab44647fdd112ce4f731f3dc0df552f4 100644
--- a/src/main/java/org/bukkit/event/inventory/InventoryClickEvent.java
+++ b/src/main/java/org/bukkit/event/inventory/InventoryClickEvent.java
@@ -88,7 +88,7 @@ public class InventoryClickEvent extends InventoryInteractEvent {
      *
      * @return the cursor ItemStack
      */
-    @Nullable
+    @NotNull // Paper - fix nullability
     public ItemStack getCursor() {
         return getView().getCursor();
     }
diff --git a/src/main/java/org/bukkit/event/inventory/InventoryType.java b/src/main/java/org/bukkit/event/inventory/InventoryType.java
index 32cd8ee2e849df602a7e10aa5d0a218007faa0ac..fbdbd2f4da5e09d4b111ddcf72e2d7dd59046bd7 100644
--- a/src/main/java/org/bukkit/event/inventory/InventoryType.java
+++ b/src/main/java/org/bukkit/event/inventory/InventoryType.java
@@ -153,7 +153,7 @@ public enum InventoryType {
      *
      * @deprecated use {@link #SMITHING}
      */
-    @Deprecated
+    @Deprecated(forRemoval = true) // Paper
     SMITHING_NEW(4, "Upgrade Gear"),
     ;
 
diff --git a/src/main/java/org/bukkit/event/player/PlayerBedLeaveEvent.java b/src/main/java/org/bukkit/event/player/PlayerBedLeaveEvent.java
index 1cb70b5c8776863f44f1c4cdde152c35cb51edb5..f09b378508fcc6299e7cb40f174028f6f88ba067 100644
--- a/src/main/java/org/bukkit/event/player/PlayerBedLeaveEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerBedLeaveEvent.java
@@ -43,7 +43,10 @@ public class PlayerBedLeaveEvent extends PlayerEvent implements Cancellable {
      * {@link Player#setBedSpawnLocation(Location)}.
      *
      * @return true if the spawn location will be changed
+     * @deprecated the respawn point is now set when the player enter the bed and
+     * this option doesn't work since MC 1.15.
      */
+    @Deprecated(forRemoval = true) // Paper - Unused
     public boolean shouldSetSpawnLocation() {
         return setBedSpawn;
     }
@@ -59,7 +62,10 @@ public class PlayerBedLeaveEvent extends PlayerEvent implements Cancellable {
      * {@link Player#setBedSpawnLocation(Location)}.
      *
      * @param setBedSpawn true to change the new spawn location
+     * @deprecated the respawn point is now set when the player enter the bed and
+     * this option doesn't work since MC 1.15.
      */
+    @Deprecated(forRemoval = true) // Paper - Unused
     public void setSpawnLocation(boolean setBedSpawn) {
         this.setBedSpawn = setBedSpawn;
     }
diff --git a/src/main/java/org/bukkit/event/player/PlayerMoveEvent.java b/src/main/java/org/bukkit/event/player/PlayerMoveEvent.java
index 1b2267f4e8ebded198773ec80e2bff2c861c7084..1a58734d919fae247eeb85dd785fd59990856505 100644
--- a/src/main/java/org/bukkit/event/player/PlayerMoveEvent.java
+++ b/src/main/java/org/bukkit/event/player/PlayerMoveEvent.java
@@ -78,7 +78,7 @@ public class PlayerMoveEvent extends PlayerEvent implements Cancellable {
      *
      * @return Location the player moved to
      */
-    @Nullable
+    @NotNull // Paper
     public Location getTo() {
         return to;
     }
diff --git a/src/main/java/org/bukkit/event/raid/RaidSpawnWaveEvent.java b/src/main/java/org/bukkit/event/raid/RaidSpawnWaveEvent.java
index cd58dd7de781823804701fc023706e805c0142a8..1b8bb5241efcf4a90fd098f2000f8394072dca4a 100644
--- a/src/main/java/org/bukkit/event/raid/RaidSpawnWaveEvent.java
+++ b/src/main/java/org/bukkit/event/raid/RaidSpawnWaveEvent.java
@@ -19,7 +19,7 @@ public class RaidSpawnWaveEvent extends RaidEvent {
     private final List<Raider> raiders;
     private final Raider leader;
 
-    public RaidSpawnWaveEvent(@NotNull Raid raid, @NotNull World world, @Nullable Raider leader, @NotNull List<Raider> raiders) {
+    public RaidSpawnWaveEvent(@NotNull Raid raid, @NotNull World world, @NotNull Raider leader, @NotNull List<Raider> raiders) { // Paper
         super(raid, world);
         this.raiders = raiders;
         this.leader = leader;
@@ -30,7 +30,7 @@ public class RaidSpawnWaveEvent extends RaidEvent {
      *
      * @return {@link Raider}
      */
-    @Nullable
+    @NotNull // Paper
     public Raider getPatrolLeader() {
         return leader;
     }
diff --git a/src/main/java/org/bukkit/event/vehicle/VehicleEntityCollisionEvent.java b/src/main/java/org/bukkit/event/vehicle/VehicleEntityCollisionEvent.java
index 6bafc62e2235a6b783cbf96f4dabeeaf02bd5178..50c762d777ac90a05772501a28cacff8fd3f5126 100644
--- a/src/main/java/org/bukkit/event/vehicle/VehicleEntityCollisionEvent.java
+++ b/src/main/java/org/bukkit/event/vehicle/VehicleEntityCollisionEvent.java
@@ -36,18 +36,22 @@ public class VehicleEntityCollisionEvent extends VehicleCollisionEvent implement
         this.cancelled = cancel;
     }
 
+    @Deprecated(forRemoval = true) // Paper - Unused
     public boolean isPickupCancelled() {
         return cancelledPickup;
     }
 
+    @Deprecated(forRemoval = true) // Paper - Unused
     public void setPickupCancelled(boolean cancel) {
         cancelledPickup = cancel;
     }
 
+    @Deprecated(forRemoval = true) // Paper - Unused
     public boolean isCollisionCancelled() {
         return cancelledCollision;
     }
 
+    @Deprecated(forRemoval = true) // Paper - Unused
     public void setCollisionCancelled(boolean cancel) {
         cancelledCollision = cancel;
     }
diff --git a/src/main/java/org/bukkit/generator/ChunkGenerator.java b/src/main/java/org/bukkit/generator/ChunkGenerator.java
index c0b749a5bbf4980d01fed74768bb61909b579cb9..7e7a53b41013f1bf8956c0e278820f18d77b2f0d 100644
--- a/src/main/java/org/bukkit/generator/ChunkGenerator.java
+++ b/src/main/java/org/bukkit/generator/ChunkGenerator.java
@@ -656,7 +656,9 @@ public abstract class ChunkGenerator {
          * @param y the y location in the chunk from minHeight (inclusive) - maxHeight (exclusive)
          * @param z the z location in the chunk from 0-15 inclusive
          * @param material the type to set the block to
+         * @deprecated use {@link #setBlock(int, int, int, BlockData)}
          */
+        @Deprecated // Paper
         public void setBlock(int x, int y, int z, @NotNull MaterialData material);
 
         /**
@@ -700,7 +702,9 @@ public abstract class ChunkGenerator {
          * @param yMax maximum y location (exclusive) in the chunk to set
          * @param zMax maximum z location (exclusive) in the chunk to set
          * @param material the type to set the blocks to
+         * @deprecated use {@link #setRegion(int, int, int, int, int, int, BlockData)}
          */
+        @Deprecated // Paper
         public void setRegion(int xMin, int yMin, int zMin, int xMax, int yMax, int zMax, @NotNull MaterialData material);
 
         /**
@@ -741,8 +745,10 @@ public abstract class ChunkGenerator {
          * @param y the y location in the chunk from minHeight (inclusive) - maxHeight (exclusive)
          * @param z the z location in the chunk from 0-15 inclusive
          * @return the type and data of the block or the MaterialData for air if x, y or z are outside the chunk's bounds
+         * @deprecated use {@link #getBlockData(int, int, int)}
          */
         @NotNull
+        @Deprecated // Paper
         public MaterialData getTypeAndData(int x, int y, int z);
 
         /**
diff --git a/src/main/java/org/bukkit/inventory/CookingRecipe.java b/src/main/java/org/bukkit/inventory/CookingRecipe.java
index 571652ba8843a9493f1843523e24145baa958637..f7fa79393aef40027446b78bac8e9490cfafd8bc 100644
--- a/src/main/java/org/bukkit/inventory/CookingRecipe.java
+++ b/src/main/java/org/bukkit/inventory/CookingRecipe.java
@@ -68,7 +68,9 @@ public abstract class CookingRecipe<T extends CookingRecipe> implements Recipe,
      * Get the input material.
      *
      * @return The input material.
+     * @deprecated Use {@link #getInputChoice()} instead for more complete data.
      */
+    @Deprecated // Paper
     @NotNull
     public ItemStack getInput() {
         return this.ingredient.getItemStack();
diff --git a/src/main/java/org/bukkit/inventory/CraftingInventory.java b/src/main/java/org/bukkit/inventory/CraftingInventory.java
index df81bac9ecff697f98941e5c8490e10391e90090..a32977ba3ba60a1c9aee6e469d5d6cd1887c55a2 100644
--- a/src/main/java/org/bukkit/inventory/CraftingInventory.java
+++ b/src/main/java/org/bukkit/inventory/CraftingInventory.java
@@ -21,8 +21,7 @@ public interface CraftingInventory extends Inventory {
      *
      * @return The contents. Individual entries may be null.
      */
-    @NotNull
-    ItemStack[] getMatrix();
+    @Nullable ItemStack @NotNull [] getMatrix(); // Paper - make array elements nullable instead array
 
     /**
      * Set the item in the result slot of the crafting inventory.
@@ -38,7 +37,7 @@ public interface CraftingInventory extends Inventory {
      * @throws IllegalArgumentException if the length of contents is greater
      *     than the size of the crafting matrix.
      */
-    void setMatrix(@NotNull ItemStack[] contents);
+    void setMatrix(@Nullable ItemStack @NotNull [] contents); // Paper - make array elements nullable instead array
 
     /**
      * Get the current recipe formed on the crafting inventory, if any.
diff --git a/src/main/java/org/bukkit/inventory/EntityEquipment.java b/src/main/java/org/bukkit/inventory/EntityEquipment.java
index 2dde946443fee1f6e79b882cbcb448549dc0c99c..127302aa7c22f59438de66fffa0b03ae84a2a8ad 100644
--- a/src/main/java/org/bukkit/inventory/EntityEquipment.java
+++ b/src/main/java/org/bukkit/inventory/EntityEquipment.java
@@ -525,6 +525,6 @@ public interface EntityEquipment {
      *
      * @return the entity this EntityEquipment belongs to
      */
-    @Nullable
+    @NotNull // Paper
     Entity getHolder();
 }
diff --git a/src/main/java/org/bukkit/inventory/FurnaceRecipe.java b/src/main/java/org/bukkit/inventory/FurnaceRecipe.java
index 1d442dc16cbb0fed21714d47007f3f11e30c57d4..af8f7b88edf0fa790edcf16356a030c4834f531e 100644
--- a/src/main/java/org/bukkit/inventory/FurnaceRecipe.java
+++ b/src/main/java/org/bukkit/inventory/FurnaceRecipe.java
@@ -67,8 +67,10 @@ public class FurnaceRecipe extends CookingRecipe<FurnaceRecipe> {
      *
      * @param input The input material.
      * @return The changed recipe, so you can chain calls.
+     * @deprecated use {@link #setInputChoice(RecipeChoice)}
      */
     @NotNull
+    @Deprecated
     public FurnaceRecipe setInput(@NotNull MaterialData input) {
         return setInput(input.getItemType(), input.getData());
     }
diff --git a/src/main/java/org/bukkit/inventory/Inventory.java b/src/main/java/org/bukkit/inventory/Inventory.java
index f1a48eab1a357ae64545e1f1dc941c383cff8707..466d1bd7089b76f48f953e1a51c611ecd93dcd54 100644
--- a/src/main/java/org/bukkit/inventory/Inventory.java
+++ b/src/main/java/org/bukkit/inventory/Inventory.java
@@ -161,8 +161,7 @@ public interface Inventory extends Iterable<ItemStack> {
      *
      * @return An array of ItemStacks from the inventory. Individual items may be null.
      */
-    @NotNull
-    public ItemStack[] getContents();
+    public @Nullable ItemStack @NotNull [] getContents(); // Paper - make array elements nullable instead array
 
     /**
      * Completely replaces the inventory's contents. Removes all existing
@@ -173,7 +172,7 @@ public interface Inventory extends Iterable<ItemStack> {
      * @throws IllegalArgumentException If the array has more items than the
      *     inventory.
      */
-    public void setContents(@NotNull ItemStack[] items) throws IllegalArgumentException;
+    public void setContents(@Nullable ItemStack @NotNull [] items) throws IllegalArgumentException; // Paper - make array elements nullable instead array
 
     /**
      * Return the contents from the section of the inventory where items can
@@ -186,8 +185,7 @@ public interface Inventory extends Iterable<ItemStack> {
      *
      * @return inventory storage contents. Individual items may be null.
      */
-    @NotNull
-    public ItemStack[] getStorageContents();
+    public @Nullable ItemStack @NotNull [] getStorageContents(); // Paper - make array elements nullable instead array
 
     /**
      * Put the given ItemStacks into the storage slots
@@ -196,7 +194,7 @@ public interface Inventory extends Iterable<ItemStack> {
      * @throws IllegalArgumentException If the array has more items than the
      * inventory.
      */
-    public void setStorageContents(@NotNull ItemStack[] items) throws IllegalArgumentException;
+    public void setStorageContents(@Nullable ItemStack @NotNull [] items) throws IllegalArgumentException; // Paper - make array elements nullable instead array
 
     /**
      * Checks if the inventory contains any ItemStacks with the given
diff --git a/src/main/java/org/bukkit/inventory/InventoryView.java b/src/main/java/org/bukkit/inventory/InventoryView.java
index 8423a1d4ef4a39bb1734b56f8a396d73b264ac9a..1e50dba6bb8753e6c1adff59ee0ff93adf3bfd4f 100644
--- a/src/main/java/org/bukkit/inventory/InventoryView.java
+++ b/src/main/java/org/bukkit/inventory/InventoryView.java
@@ -125,9 +125,9 @@ public interface InventoryView {
          * Gets the id of this view.
          *
          * @return the id of this view
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public int getId() {
             return id;
         }
@@ -197,10 +197,10 @@ public interface InventoryView {
     /**
      * Get the item on the cursor of one of the viewing players.
      *
-     * @return The item on the player's cursor, or null if they aren't holding
-     *     one.
+     * @return The item on the player's cursor, or an empty stack
+     * if they aren't holding one.
      */
-    @Nullable
+    @NotNull // Paper - fix nullability
     public ItemStack getCursor();
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/ItemFactory.java b/src/main/java/org/bukkit/inventory/ItemFactory.java
index 3d08beee52f2247db6f6e679206ed6a965fbf9a8..1b4f9b93860e58762ac28715adad5a67298b06d7 100644
--- a/src/main/java/org/bukkit/inventory/ItemFactory.java
+++ b/src/main/java/org/bukkit/inventory/ItemFactory.java
@@ -29,7 +29,7 @@ public interface ItemFactory {
      * @return a new ItemMeta that could be applied to an item stack of the
      *     specified material
      */
-    @Nullable
+    @org.bukkit.UndefinedNullability // Paper
     ItemMeta getItemMeta(@NotNull final Material material);
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index d125d29759167996a90b7b69d92d944e80af22ab..d5dd79c98f4d37b09d232214f06ed7dca3a7e6dd 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -10,6 +10,7 @@ import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
 import org.bukkit.Registry;
 import org.bukkit.Translatable;
+import org.bukkit.UndefinedNullability;
 import org.bukkit.Utility;
 import org.bukkit.configuration.serialization.ConfigurationSerializable;
 import org.bukkit.enchantments.Enchantment;
@@ -179,8 +180,10 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      * Gets the MaterialData for this stack of items
      *
      * @return MaterialData for this item
+     * @deprecated cast to {@link org.bukkit.inventory.meta.BlockDataMeta} and use {@link org.bukkit.inventory.meta.BlockDataMeta#getBlockData(Material)}
      */
     @Nullable
+    @Deprecated // Paper
     public MaterialData getData() {
         Material mat = Bukkit.getUnsafe().toLegacy(getType());
         if (data == null && mat != null && mat.getData() != null) {
@@ -194,7 +197,9 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      * Sets the MaterialData for this stack of items
      *
      * @param data New MaterialData for this item
+     * @deprecated cast to {@link org.bukkit.inventory.meta.BlockDataMeta} and use {@link org.bukkit.inventory.meta.BlockDataMeta#setBlockData(org.bukkit.block.data.BlockData)}
      */
+    @Deprecated // Paper
     public void setData(@Nullable MaterialData data) {
         if (data == null) {
             this.data = data;
@@ -574,7 +579,7 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      *
      * @return a copy of the current ItemStack's ItemData
      */
-    @Nullable
+    @UndefinedNullability // Paper
     public ItemMeta getItemMeta() {
         return this.meta == null ? Bukkit.getItemFactory().getItemMeta(this.type) : this.meta.clone();
     }
diff --git a/src/main/java/org/bukkit/inventory/PlayerInventory.java b/src/main/java/org/bukkit/inventory/PlayerInventory.java
index 476fe14faa39f02444cab8ad95d4401033dc6938..2c54660dc1fbc7c1232096797a23cae1262888e9 100644
--- a/src/main/java/org/bukkit/inventory/PlayerInventory.java
+++ b/src/main/java/org/bukkit/inventory/PlayerInventory.java
@@ -16,8 +16,7 @@ public interface PlayerInventory extends Inventory {
      * null and are returned in a fixed order starting from the boots and going
      * up to the helmet
      */
-    @NotNull
-    public ItemStack[] getArmorContents();
+    public @Nullable ItemStack @NotNull [] getArmorContents(); // Paper - make array elements nullable instead array
 
     /**
      * Get all additional ItemStacks stored in this inventory.
@@ -28,8 +27,7 @@ public interface PlayerInventory extends Inventory {
      *
      * @return All additional ItemStacks. Individual items can be null.
      */
-    @NotNull
-    public ItemStack[] getExtraContents();
+    public @Nullable ItemStack @NotNull [] getExtraContents(); // Paper - make array elements nullable instead array
 
     /**
      * Return the ItemStack from the helmet slot
@@ -106,9 +104,9 @@ public interface PlayerInventory extends Inventory {
      *
      * @param slot the slot to get the ItemStack
      *
-     * @return the ItemStack in the given slot or null if there is not one
+     * @return the ItemStack in the given slot
      */
-    @Nullable
+    @NotNull // Paper
     public ItemStack getItem(@NotNull EquipmentSlot slot);
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/ShapedRecipe.java b/src/main/java/org/bukkit/inventory/ShapedRecipe.java
index 97d5d9c6347bc401e3f4ab7c0ba1391ad5b0449a..da878c6d4928ddbc16b50ace86d992685a2b7873 100644
--- a/src/main/java/org/bukkit/inventory/ShapedRecipe.java
+++ b/src/main/java/org/bukkit/inventory/ShapedRecipe.java
@@ -100,8 +100,10 @@ public class ShapedRecipe extends CraftingRecipe {
      * @param ingredient The ingredient.
      * @return The changed recipe, so you can chain calls.
      * @throws IllegalArgumentException if the {@code key} does not appear in the shape.
+     * @deprecated use {@link #setIngredient(char, RecipeChoice)}
      */
     @NotNull
+    @Deprecated // Paper
     public ShapedRecipe setIngredient(char key, @NotNull MaterialData ingredient) {
         return setIngredient(key, ingredient.getItemType(), ingredient.getData());
     }
@@ -179,7 +181,9 @@ public class ShapedRecipe extends CraftingRecipe {
      * Get a copy of the ingredients map.
      *
      * @return The mapping of character to ingredients.
+     * @deprecated Use {@link #getChoiceMap()} instead for more complete data.
      */
+    @Deprecated // Paper
     @NotNull
     public Map<Character, ItemStack> getIngredientMap() {
         HashMap<Character, ItemStack> result = new HashMap<Character, ItemStack>();
diff --git a/src/main/java/org/bukkit/inventory/ShapelessRecipe.java b/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
index b8ac602cd2718d615ec243ce648951a1a46c26ec..beb798482479c58a8628c314b510ab6349576ce8 100644
--- a/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
+++ b/src/main/java/org/bukkit/inventory/ShapelessRecipe.java
@@ -43,8 +43,10 @@ public class ShapelessRecipe extends CraftingRecipe {
      *
      * @param ingredient The ingredient to add.
      * @return The changed recipe, so you can chain calls.
+     * @deprecated use {@link #addIngredient(RecipeChoice)}
      */
     @NotNull
+    @Deprecated
     public ShapelessRecipe addIngredient(@NotNull MaterialData ingredient) {
         return addIngredient(1, ingredient);
     }
@@ -80,8 +82,10 @@ public class ShapelessRecipe extends CraftingRecipe {
      * @param count How many to add (can't be more than 9!)
      * @param ingredient The ingredient to add.
      * @return The changed recipe, so you can chain calls.
+     * @deprecated use {@link #addIngredient(int, Material)}
      */
     @NotNull
+    @Deprecated // Paper
     public ShapelessRecipe addIngredient(int count, @NotNull MaterialData ingredient) {
         return addIngredient(count, ingredient.getItemType(), ingredient.getData());
     }
@@ -198,8 +202,10 @@ public class ShapelessRecipe extends CraftingRecipe {
      *
      * @param ingredient The ingredient to remove
      * @return The changed recipe.
+     * @deprecated use {@link #removeIngredient(Material)}
      */
     @NotNull
+    @Deprecated // Paper
     public ShapelessRecipe removeIngredient(@NotNull MaterialData ingredient) {
         return removeIngredient(ingredient.getItemType(), ingredient.getData());
     }
@@ -226,8 +232,10 @@ public class ShapelessRecipe extends CraftingRecipe {
      * @param count The number of copies to remove.
      * @param ingredient The ingredient to remove.
      * @return The changed recipe.
+     * @deprecated use {@link #removeIngredient(int, Material)}
      */
     @NotNull
+    @Deprecated // Paper
     public ShapelessRecipe removeIngredient(int count, @NotNull MaterialData ingredient) {
         return removeIngredient(count, ingredient.getItemType(), ingredient.getData());
     }
@@ -277,7 +285,9 @@ public class ShapelessRecipe extends CraftingRecipe {
      * Get the list of ingredients used for this recipe.
      *
      * @return The input list
+     * @deprecated Use {@link #getChoiceList()} instead for more complete data.
      */
+    @Deprecated // Paper
     @NotNull
     public List<ItemStack> getIngredientList() {
         ArrayList<ItemStack> result = new ArrayList<ItemStack>(ingredients.size());
diff --git a/src/main/java/org/bukkit/inventory/StonecuttingRecipe.java b/src/main/java/org/bukkit/inventory/StonecuttingRecipe.java
index 597a18a767b68b47e81454b7d44613c7178c1366..bc3440eb72127824b3961fbdae583bb61385f65e 100644
--- a/src/main/java/org/bukkit/inventory/StonecuttingRecipe.java
+++ b/src/main/java/org/bukkit/inventory/StonecuttingRecipe.java
@@ -57,7 +57,9 @@ public class StonecuttingRecipe implements Recipe, Keyed {
      * Get the input material.
      *
      * @return The input material.
+     * @deprecated Use {@link #getInputChoice()} instead for more complete data.
      */
+    @Deprecated // Paper
     @NotNull
     public ItemStack getInput() {
         return this.ingredient.getItemStack();
diff --git a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
index 10ca843e57c74dfa32d539acd174c8867dfd56ec..e7ee3c9ac835a6eaf7faae44e6b2a811e8f8a703 100644
--- a/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/ItemMeta.java
@@ -144,6 +144,7 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
     /**
      * Checks for existence of a localized name.
      *
+     * @deprecated Use {@link ItemMeta#displayName()} and check if it is instanceof a {@link net.kyori.adventure.text.TranslatableComponent}.
      * @return true if this has a localized name
      * @deprecated meta no longer exists
      */
@@ -156,6 +157,7 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      * Plugins should check that hasLocalizedName() returns <code>true</code>
      * before calling this method.
      *
+     * @deprecated Use {@link ItemMeta#displayName()} and cast it to a {@link net.kyori.adventure.text.TranslatableComponent}. No longer used by the client.
      * @return the localized name that is set
      * @deprecated meta no longer exists
      */
@@ -166,6 +168,7 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
     /**
      * Sets the localized name.
      *
+     * @deprecated Use {@link ItemMeta#displayName(Component)} with a {@link net.kyori.adventure.text.TranslatableComponent}. No longer used by the client.
      * @param name the name to set
      * @deprecated meta no longer exists
      */
@@ -545,7 +548,7 @@ public interface ItemMeta extends Cloneable, ConfigurationSerializable, Persiste
      *
      * @return component
      */
-    @Nullable
+    @NotNull // Paper
     JukeboxPlayableComponent getJukeboxPlayable();
 
     /**
diff --git a/src/main/java/org/bukkit/inventory/meta/MapMeta.java b/src/main/java/org/bukkit/inventory/meta/MapMeta.java
index 32055a8890425e0b819930f3059da5ea9dfca553..26a336dade83baee97d20eb39a058925659f5777 100644
--- a/src/main/java/org/bukkit/inventory/meta/MapMeta.java
+++ b/src/main/java/org/bukkit/inventory/meta/MapMeta.java
@@ -16,13 +16,8 @@ public interface MapMeta extends ItemMeta {
      *
      * @return true if this has a map ID number.
      * @see #hasMapView()
-     * @deprecated These methods are poor API: They rely on the caller to pass
-     * in an only an integer property, and have poorly defined implementation
-     * behavior if that integer is not a valid map (the current implementation
-     * for example will generate a new map with a different ID). The xxxMapView
-     * family of methods should be used instead.
      */
-    @Deprecated
+    //@Deprecated // Paper
     boolean hasMapId();
 
     /**
@@ -34,13 +29,8 @@ public interface MapMeta extends ItemMeta {
      *
      * @return the map ID that is set
      * @see #getMapView()
-     * @deprecated These methods are poor API: They rely on the caller to pass
-     * in an only an integer property, and have poorly defined implementation
-     * behavior if that integer is not a valid map (the current implementation
-     * for example will generate a new map with a different ID). The xxxMapView
-     * family of methods should be used instead.
      */
-    @Deprecated
+    //@Deprecated // Paper
     int getMapId();
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCanvas.java b/src/main/java/org/bukkit/map/MapCanvas.java
index edef478786bb7456af29ca960009873095830050..e8ac449e6280827beb6d2699df75b1d52a922c9b 100644
--- a/src/main/java/org/bukkit/map/MapCanvas.java
+++ b/src/main/java/org/bukkit/map/MapCanvas.java
@@ -95,9 +95,9 @@ public interface MapCanvas {
      * @param x The x coordinate, from 0 to 127.
      * @param y The y coordinate, from 0 to 127.
      * @return The color. See {@link MapPalette}.
-     * @deprecated Magic value, use {@link #getPixelColor(int, int)}
+     * @deprecated use {@link #getPixelColor(int, int)}
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public byte getPixel(int x, int y);
 
     /**
@@ -106,9 +106,9 @@ public interface MapCanvas {
      * @param x The x coordinate, from 0 to 127.
      * @param y The y coordinate, from 0 to 127.
      * @return The color. See {@link MapPalette}.
-     * @deprecated Magic value, use {@link #getBasePixelColor(int, int)}
+     * @deprecated use {@link #getBasePixelColor(int, int)}
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public byte getBasePixel(int x, int y);
 
     /**
diff --git a/src/main/java/org/bukkit/map/MapCursor.java b/src/main/java/org/bukkit/map/MapCursor.java
index 940066ec529acc4cb9c8136f15345f100ea9467e..82993302cb3cf62ad4a94a0ebaa7711cc4d8e550 100644
--- a/src/main/java/org/bukkit/map/MapCursor.java
+++ b/src/main/java/org/bukkit/map/MapCursor.java
@@ -159,9 +159,9 @@ public final class MapCursor {
      * Get the type of this cursor.
      *
      * @return The type (color/style) of the map cursor.
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     public byte getRawType() {
         return type.value;
     }
@@ -216,9 +216,9 @@ public final class MapCursor {
      * Set the type of this cursor.
      *
      * @param type The type (color/style) of the map cursor.
-     * @deprecated Magic value
+     * @deprecated use {@link #setType(Type)}
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public void setRawType(byte type) {
         Type enumType = Type.byValue(type);
         Preconditions.checkArgument(enumType != null, "Unknown type by id %s", type);
@@ -337,9 +337,9 @@ public final class MapCursor {
          * Gets the internal value of the cursor.
          *
          * @return the value
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public byte getValue() {
             return value;
         }
@@ -349,9 +349,9 @@ public final class MapCursor {
          *
          * @param value the value
          * @return the matching type
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         @Nullable
         public static Type byValue(byte value) {
             for (Type t : values()) {
diff --git a/src/main/java/org/bukkit/map/MapPalette.java b/src/main/java/org/bukkit/map/MapPalette.java
index 3a9aaca2e76411a9c27f9f5e0f22d060d5a66d06..c80faa079eca1564847070f0338fc98024639829 100644
--- a/src/main/java/org/bukkit/map/MapPalette.java
+++ b/src/main/java/org/bukkit/map/MapPalette.java
@@ -197,9 +197,9 @@ public final class MapPalette {
      *
      * @param image The image to convert.
      * @return A byte[] containing the pixels of the image.
-     * @deprecated Magic value
+     * @deprecated use color-related methods
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     @NotNull
     public static byte[] imageToBytes(@NotNull Image image) {
         BufferedImage temp = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
@@ -225,9 +225,9 @@ public final class MapPalette {
      * @param b The blue component of the color.
      * @param g The green component of the color.
      * @return The index in the palette.
-     * @deprecated Magic value
+     * @deprecated use color-related methods
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public static byte matchColor(int r, int g, int b) {
         return matchColor(new Color(r, g, b));
     }
@@ -238,9 +238,9 @@ public final class MapPalette {
      *
      * @param color The Color to match.
      * @return The index in the palette.
-     * @deprecated Magic value
+     * @deprecated use color-related methods
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public static byte matchColor(@NotNull Color color) {
         if (color.getAlpha() < 128) return 0;
 
@@ -268,9 +268,9 @@ public final class MapPalette {
      *
      * @param index The index in the palette.
      * @return The Color of the palette entry.
-     * @deprecated Magic value
+     * @deprecated use color directly
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     @NotNull
     public static Color getColor(byte index) {
         // Minecraft has 143 colors, some of which have negative byte representations
@@ -311,9 +311,9 @@ public final class MapPalette {
          * @param color The Color to match.
          * @return The index in the palette.
          * @throws IllegalStateException if {@link #isCached()} returns false
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         byte matchColor(@NotNull Color color);
     }
 }
diff --git a/src/main/java/org/bukkit/map/MapView.java b/src/main/java/org/bukkit/map/MapView.java
index 9b8b68b66dc15b06800251702c2722623c8462a0..e998c5d871e02564c24260a8205dcfafb6e703d9 100644
--- a/src/main/java/org/bukkit/map/MapView.java
+++ b/src/main/java/org/bukkit/map/MapView.java
@@ -32,9 +32,9 @@ public interface MapView {
          *
          * @param value The raw scale
          * @return The enum scale, or null for an invalid input
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         @Nullable
         public static Scale valueOf(byte value) {
             switch (value) {
@@ -51,9 +51,9 @@ public interface MapView {
          * Get the raw value of this scale level.
          *
          * @return The scale value
-         * @deprecated Magic value
+         * @apiNote Internal Use Only
          */
-        @Deprecated
+        @org.jetbrains.annotations.ApiStatus.Internal // Paper
         public byte getValue() {
             return value;
         }
diff --git a/src/main/java/org/bukkit/material/Openable.java b/src/main/java/org/bukkit/material/Openable.java
index 0ae54f973d11df74abb3105cf9226afb130b4f33..597036bad6bc61b4aa63a61b45e886dd74a0b7f6 100644
--- a/src/main/java/org/bukkit/material/Openable.java
+++ b/src/main/java/org/bukkit/material/Openable.java
@@ -1,5 +1,6 @@
 package org.bukkit.material;
 
+@Deprecated // Paper
 public interface Openable {
 
     /**
diff --git a/src/main/java/org/bukkit/material/Redstone.java b/src/main/java/org/bukkit/material/Redstone.java
index 3e46603f8cd38041394e0e1baf788d9009b3ffc7..b15c141f1db07296bb349f11c6f39b0fbe53e7b1 100644
--- a/src/main/java/org/bukkit/material/Redstone.java
+++ b/src/main/java/org/bukkit/material/Redstone.java
@@ -3,6 +3,7 @@ package org.bukkit.material;
 /**
  * Indicated a Material that may carry or create a Redstone current
  */
+@Deprecated // Paper
 public interface Redstone {
 
     /**
diff --git a/src/main/java/org/bukkit/material/types/MushroomBlockTexture.java b/src/main/java/org/bukkit/material/types/MushroomBlockTexture.java
index 0ea9c6b2420a0f990bd1fdf50fc015e37a7060d8..e99644eae1c662b117aa19060d2484aca19fe0a4 100644
--- a/src/main/java/org/bukkit/material/types/MushroomBlockTexture.java
+++ b/src/main/java/org/bukkit/material/types/MushroomBlockTexture.java
@@ -7,7 +7,9 @@ import org.jetbrains.annotations.Nullable;
 
 /**
  * Represents the different textured blocks of mushroom.
+ * @deprecated use BlockData
  */
+@Deprecated // Paper
 public enum MushroomBlockTexture {
 
     /**
diff --git a/src/main/java/org/bukkit/potion/PotionEffectType.java b/src/main/java/org/bukkit/potion/PotionEffectType.java
index 6bbfebab2ee2b59b3f3213789ecb59e2e7f2680a..42d893ce75a75fe46a4e52b17dc405f5b609ab86 100644
--- a/src/main/java/org/bukkit/potion/PotionEffectType.java
+++ b/src/main/java/org/bukkit/potion/PotionEffectType.java
@@ -279,9 +279,9 @@ public abstract class PotionEffectType implements Keyed, Translatable {
      * Returns the unique ID of this type.
      *
      * @return Unique ID
-     * @deprecated Magic value
+     * @deprecated use {@link #key()}
      */
-    @Deprecated
+    @Deprecated(forRemoval = true, since = "1.20.2") // Paper
     public abstract int getId();
 
     /**
@@ -317,9 +317,9 @@ public abstract class PotionEffectType implements Keyed, Translatable {
      *
      * @param id Unique ID to fetch
      * @return Resulting type, or null if not found.
-     * @deprecated Magic value
+     * @apiNote Internal Use Only
      */
-    @Deprecated
+    @org.jetbrains.annotations.ApiStatus.Internal // Paper
     @Nullable
     public static PotionEffectType getById(int id) {
         PotionEffectType type = ID_MAP.get(id);
diff --git a/src/test/java/org/bukkit/materials/MaterialDataTest.java b/src/test/java/org/bukkit/materials/MaterialDataTest.java
index 8d78435cc42a9e668b2d4d674b79b4094c3bd1b1..24a8ce4387b897c717b55405f363ffafff45894d 100644
--- a/src/test/java/org/bukkit/materials/MaterialDataTest.java
+++ b/src/test/java/org/bukkit/materials/MaterialDataTest.java
@@ -22,6 +22,7 @@ import org.bukkit.material.WoodenStep;
 import org.bukkit.material.types.MushroomBlockTexture;
 import org.junit.jupiter.api.Test;
 
+@Deprecated // Paper
 public class MaterialDataTest {
 
     @Test