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24 lines
1.9 KiB
Diff
24 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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Date: Tue, 18 Jan 2022 11:07:54 -0700
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Subject: [PATCH] Warn on strange @EventHandler return types
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diff --git a/src/main/java/org/bukkit/plugin/EventExecutor.java b/src/main/java/org/bukkit/plugin/EventExecutor.java
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index 9026e108ccd3a88aee1267ee275137befa646455..e1860322ae0f3c35097d16767628744034941749 100644
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--- a/src/main/java/org/bukkit/plugin/EventExecutor.java
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+++ b/src/main/java/org/bukkit/plugin/EventExecutor.java
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@@ -51,6 +51,12 @@ public interface EventExecutor {
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Preconditions.checkArgument(m.getParameterCount() != 0, "Incorrect number of arguments %s", m.getParameterCount());
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Preconditions.checkArgument(m.getParameterTypes()[0] == eventClass, "First parameter %s doesn't match event class %s", m.getParameterTypes()[0], eventClass);
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ClassDefiner definer = ClassDefiner.getInstance();
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+ if (m.getReturnType() != Void.TYPE) {
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+ final org.bukkit.plugin.java.JavaPlugin plugin = org.bukkit.plugin.java.JavaPlugin.getProvidingPlugin(m.getDeclaringClass());
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+ org.bukkit.Bukkit.getLogger().warning("@EventHandler method " + m.getDeclaringClass().getName() + (Modifier.isStatic(m.getModifiers()) ? '.' : '#') + m.getName()
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+ + " returns non-void type " + m.getReturnType().getName() + ". This is unsupported behavior and will no longer work in a future version of Paper."
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+ + " This should be reported to the developers of " + plugin.getDescription().getFullName() + " (" + String.join(",", plugin.getDescription().getAuthors()) + ')');
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+ }
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if (Modifier.isStatic(m.getModifiers())) {
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return new StaticMethodHandleEventExecutor(eventClass, m);
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} else if (definer.isBypassAccessChecks() || Modifier.isPublic(m.getDeclaringClass().getModifiers()) && Modifier.isPublic(m.getModifiers())) {
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