From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paul Sauve <paul@technove.co>
Date: Sat, 19 Dec 2020 19:06:37 -0600
Subject: [PATCH] Airplane API Changes

Copyright (C) 2020 Technove LLC

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
index 8a39c48fce819d72a94d5309db8dfc42930989af..4c84e3a5c983b7f8fe5515fff6fcfa64106150d2 100644
--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -46,6 +46,8 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
     private final Set<String> seenIllegalAccess = Collections.newSetFromMap(new ConcurrentHashMap<>());
     private java.util.logging.Logger logger; // Paper - add field
 
+    private boolean closed = false; // Airplane
+
     static {
         ClassLoader.registerAsParallelCapable();
     }
@@ -151,6 +153,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
         throw new ClassNotFoundException(name);
     }
 
+    public boolean _airplane_hasClass(@NotNull String name) { return this.classes.containsKey(name); } // Airplane
     @Override
     protected Class<?> findClass(String name) throws ClassNotFoundException {
         if (name.startsWith("org.bukkit.") || name.startsWith("net.minecraft.")) {
@@ -158,7 +161,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
         }
         Class<?> result = classes.get(name);
 
-        if (result == null) {
+        if (result == null && !this.closed) { // Airplane
             String path = name.replace('.', '/').concat(".class");
             JarEntry entry = jar.getJarEntry(path);
 
@@ -213,6 +216,7 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
         try {
             super.close();
         } finally {
+            this.closed = true; // Airplane
             jar.close();
         }
     }