Update to 1.16.1, API breaking changes.

Added support for 1.16.1.
Sky color changes working. Freeze partially working. The freeze is only successful randomly. So it works, but not all the time.
Refactored Bukkit SkyChangeImpl to contain less duplicate code and have it easier to maintain as new versions roll out.
Added a function to ReflectionUtil which can retrieve and cache declared classes.

API BREAKING CHANGES
Renamed the SkyPacket enums to be more in line with what they actually represent.
FADE_VALUE -> RAIN_LEVEL_CHANGE
FADE_TIME -> THUNDER_LEVEL_CHANGE.

Command usage remains the same.

LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017-2018 Daniel D. Scalzi
+Copyright (c) 2017-2020 Daniel D. Scalzi
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,6 +1,6 @@
 ![# Header](http://i.imgur.com/6TxDQ3W.png?1)
 
-[<img src="https://ci.appveyor.com/api/projects/status/3j1tc074rvi6a3mr?retina=true" height='20.74px'></img>](https://ci.appveyor.com/project/dscalzi/skychanger) [![](https://pluginbadges.glitch.me/api/v1/dl/Downloads-limegreen.svg?bukkit=skychanger&spigot=skychanger.37524&ore=skychanger&github=dscalzi/SkyChanger&style=flat)](https://github.com/dscalzi/PluginBadges) [![](https://img.shields.io/github/license/dscalzi/SkyChanger.svg)](https://github.com/dscalzi/SkyChanger/blob/master/LICENSE.txt) ![](https://img.shields.io/badge/Spigot-1.8.x--1.15.x-orange.svg) [![](https://discordapp.com/api/guilds/211524927831015424/widget.png)](https://discordapp.com/invite/Fcrh6PT)
+[<img src="https://ci.appveyor.com/api/projects/status/3j1tc074rvi6a3mr?retina=true" height='20.74px'></img>](https://ci.appveyor.com/project/dscalzi/skychanger) [![](https://pluginbadges.glitch.me/api/v1/dl/Downloads-limegreen.svg?bukkit=skychanger&spigot=skychanger.37524&ore=skychanger&github=dscalzi/SkyChanger&style=flat)](https://github.com/dscalzi/PluginBadges) [![](https://img.shields.io/github/license/dscalzi/SkyChanger.svg)](https://github.com/dscalzi/SkyChanger/blob/master/LICENSE.txt) ![](https://img.shields.io/badge/Spigot-1.8.x--1.16.x-orange.svg) [![](https://discordapp.com/api/guilds/211524927831015424/widget.png)](https://discordapp.com/invite/Fcrh6PT)
 
 SkyChanger is a light-weight plugin for Spigot and Sponge. The main function of this plugin is to change the color of the sky for yourself, a specific player, a specific world, or everyone. This plugin functions by sending packets with a specified value to the target player(s).
 
@@ -102,15 +102,15 @@ public void skychangerTests(Player player) {
 
     // Change the sky and save the result.
     // Equivalent to /SkyChanger 3
-    boolean result1 = api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.FADE_VALUE, 3F);
+    boolean result1 = api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.RAIN_LEVEL_CHANGE, 3F);
 
     if(result1) {
         player.sendMessage("Why did the sky turn red?");
     }
 
     // Equivalent to /SkyChanger 4 8
-    boolean result2 = api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.FADE_VALUE, 4F)
-                 && api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.FADE_TIME, 8F);
+    boolean result2 = api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.RAIN_LEVEL_CHANGE, 4F)
+                 && api.changeSky(SkyChanger.wrapPlayer(player), SkyPacket.THUNDER_LEVEL_CHANGE, 8F);
 
     if(result2) {
         player.sendMessage("Why did the sky turn light blue?");

SkyChanger-Bukkit/build.gradle

@@ -11,7 +11,7 @@ repositories {
 }
 
 dependencies {
-    compileOnly 'org.spigotmc:spigot-api:1.15.2-R0.1-SNAPSHOT'
+    compileOnly 'org.spigotmc:spigot-api:1.16.1-R0.1-SNAPSHOT'
 
     api project(':SkyChanger-Core')
     implementation 'org.bstats:bstats-bukkit:1.7'

SkyChanger-Bukkit/src/main/java/com/dscalzi/skychanger/bukkit/internal/ReflectionUtil.java

@@ -39,12 +39,14 @@ public final class ReflectionUtil {
 
     private final static Map<String, Class<?>> nmsClasses;
     private final static Map<String, Class<?>> ocbClasses;
+    private final static Map<Class<?>, Map<String, Class<?>>> declaredClasses;
 
     private final static Map<Class<?>, Map<String, Method>> cachedMethods;
 
     static {
         nmsClasses = new HashMap<>();
         ocbClasses = new HashMap<>();
+        declaredClasses = new HashMap<>();
         cachedMethods = new HashMap<>();
     }
 
@@ -111,9 +113,31 @@ public static Class<?> getOCBClass(String localPackage) {
         return clazz;
     }
 
+    public static Class<?> getDeclaredClass(Class<?> origin, String className) {
+        if (!declaredClasses.containsKey(origin))
+            declaredClasses.put(origin, new HashMap<>());
+
+        Map<String, Class<?>> classMap = declaredClasses.get(origin);
+
+        if (classMap.containsKey(className))
+            return classMap.get(className);
+
+        for(Class<?> clazz : origin.getDeclaredClasses()) {
+            if(clazz.getSimpleName().equals(className)) {
+                classMap.put(className, clazz);
+                declaredClasses.put(origin, classMap);
+                return clazz;
+            }
+        }
+
+        classMap.put(className, null);
+        declaredClasses.put(origin, classMap);
+        return null;
+    }
+
     public static Method getMethod(Class<?> clazz, String methodName, Class<?>... params) {
         if (!cachedMethods.containsKey(clazz))
-            cachedMethods.put(clazz, new HashMap<String, Method>());
+            cachedMethods.put(clazz, new HashMap<>());
 
         Map<String, Method> methods = cachedMethods.get(clazz);