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Enable Multi-Release plugin jar support

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Fixes #4841
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Kyle Wood 2020-12-04 15:57:46 -08:00
parent 31a6e3f898
commit f15abda562
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GPG key ID: D74E80413907E2D3
2 changed files with 61 additions and 38 deletions
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Spigot-API-Patches/0241-Enable-multi-release-plugin-jars.patch Normal file
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@ -0,0 +1,30 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kyle Wood <demonwav@gmail.com>
Date: Fri, 4 Dec 2020 15:53:19 -0800
Subject: [PATCH] Enable multi-release plugin jars
diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
index 62f7a6817da079513f471e36cd79739d36a36d86..7760be3e34fa20825faf145d9fb5b2855c1a4602 100644
--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -56,7 +56,18 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
this.description = description;
this.dataFolder = dataFolder;
this.file = file;
- this.jar = new JarFile(file);
+ // Paper - enable multi-release jars for Java 9+
+ JarFile jarFile;
+ try {
+ final java.lang.reflect.Method runtimeVersionMethod = JarFile.class.getMethod("runtimeVersion");
+ final Object runtimeVersion = runtimeVersionMethod.invoke(null);
+ @SuppressWarnings("JavaReflectionMemberAccess") final java.lang.reflect.Constructor<JarFile> constructor = JarFile.class.getConstructor(File.class, boolean.class, int.class, runtimeVersion.getClass());
+ jarFile = constructor.newInstance(file, true, java.util.zip.ZipFile.OPEN_READ, runtimeVersion);
+ } catch (Exception ignored) {
+ jarFile = new JarFile(file);
+ }
+ this.jar = jarFile;
+ // Paper end
this.manifest = jar.getManifest();
this.url = file.toURI().toURL();