From 98cdfc0f2420dc7b2eb847a020f2ba55adc51179 Mon Sep 17 00:00:00 2001
From: Su5eD <su5ed@outlook.com>
Date: Sun, 17 Mar 2024 19:44:34 +0100
Subject: [PATCH] Initialize language adapters lazily

---
 .../loader/impl/FabricLoaderImpl.java         | 19 ++++++++++++-------
 .../impl/entrypoint/EntrypointStorage.java    | 17 ++++++-----------
 2 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/src/main/java/net/fabricmc/loader/impl/FabricLoaderImpl.java b/src/main/java/net/fabricmc/loader/impl/FabricLoaderImpl.java
index 83ac5a7b..a5401c50 100644
--- a/src/main/java/net/fabricmc/loader/impl/FabricLoaderImpl.java
+++ b/src/main/java/net/fabricmc/loader/impl/FabricLoaderImpl.java
@@ -16,6 +16,7 @@
 
 package net.fabricmc.loader.impl;
 
+import com.google.common.base.Suppliers;
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.Multimap;
 import cpw.mods.modlauncher.ArgumentHandler;
@@ -41,6 +42,7 @@
 import java.nio.file.Path;
 import java.util.*;
 import java.util.function.Consumer;
+import java.util.function.Supplier;
 
 @SuppressWarnings("deprecation")
 public final class FabricLoaderImpl extends net.fabricmc.loader.FabricLoader {
@@ -50,7 +52,7 @@ public final class FabricLoaderImpl extends net.fabricmc.loader.FabricLoader {
     private final List<ModContainerImpl> mods = new ArrayList<>();
     private final Multimap<String, String> modAliases = HashMultimap.create();
 
-    private final Map<String, LanguageAdapter> adapterMap = new HashMap<>();
+    private final Map<String, Supplier<LanguageAdapter>> adapterMap = new HashMap<>();
     private final EntrypointStorage entrypointStorage = new EntrypointStorage();
 
     private final ObjectShare objectShare = new ObjectShareImpl();
@@ -229,7 +231,7 @@ public void setup() {
     }
 
     private void setupLanguageAdapters() {
-        adapterMap.put("default", DefaultLanguageAdapter.INSTANCE);
+        adapterMap.put("default", () -> DefaultLanguageAdapter.INSTANCE);
 
         for (ModContainerImpl mod : mods) {
             // add language adapters
@@ -238,11 +240,14 @@ private void setupLanguageAdapters() {
                     throw new RuntimeException("Duplicate language adapter key: " + laEntry.getKey() + "! (" + laEntry.getValue() + ", " + adapterMap.get(laEntry.getKey()).getClass().getName() + ")");
                 }
 
-                try {
-                    adapterMap.put(laEntry.getKey(), (LanguageAdapter) Class.forName(laEntry.getValue(), true, Thread.currentThread().getContextClassLoader()).getDeclaredConstructor().newInstance());
-                } catch (Exception e) {
-                    throw new RuntimeException("Failed to instantiate language adapter: " + laEntry.getKey(), e);
-                }
+                Supplier<LanguageAdapter> supplier = Suppliers.memoize(() -> {
+                    try {
+                        return (LanguageAdapter) Class.forName(laEntry.getValue(), true, Thread.currentThread().getContextClassLoader()).getDeclaredConstructor().newInstance();
+                    } catch (Exception e) {
+                        throw new RuntimeException("Failed to instantiate language adapter: " + laEntry.getKey(), e);
+                    }
+                });
+                adapterMap.put(laEntry.getKey(), supplier);
             }
         }
     }
diff --git a/src/main/java/net/fabricmc/loader/impl/entrypoint/EntrypointStorage.java b/src/main/java/net/fabricmc/loader/impl/entrypoint/EntrypointStorage.java
index 29f2db7c..4030b90b 100644
--- a/src/main/java/net/fabricmc/loader/impl/entrypoint/EntrypointStorage.java
+++ b/src/main/java/net/fabricmc/loader/impl/entrypoint/EntrypointStorage.java
@@ -25,13 +25,8 @@
 import net.fabricmc.loader.impl.util.log.Log;
 import net.fabricmc.loader.impl.util.log.LogCategory;
 
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.IdentityHashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
+import java.util.function.Supplier;
 
 public final class EntrypointStorage {
 	interface Entry {
@@ -98,11 +93,11 @@ public Collection<Object> getInstances() {
 
 	private static final class NewEntry implements Entry {
 		private final ModContainerImpl mod;
-		private final LanguageAdapter adapter;
+		private final Supplier<LanguageAdapter> adapter;
 		private final String value;
 		private final Map<Class<?>, Object> instanceMap;
 
-		NewEntry(ModContainerImpl mod, LanguageAdapter adapter, String value) {
+		NewEntry(ModContainerImpl mod, Supplier<LanguageAdapter> adapter, String value) {
 			this.mod = mod;
 			this.adapter = adapter;
 			this.value = value;
@@ -121,7 +116,7 @@ public synchronized <T> T getOrCreate(Class<T> type) throws Exception {
 			T ret = (T) instanceMap.get(type);
 
 			if (ret == null) {
-				ret = adapter.create(mod, value, type);
+				ret = adapter.get().create(mod, value, type);
 				assert ret != null;
 				T prev = (T) instanceMap.putIfAbsent(type, ret);
 				if (prev != null) ret = prev;
@@ -173,7 +168,7 @@ public void addDeprecated(ModContainerImpl modContainer, String adapter, String
 		getOrCreateEntries("server").add(oe);
 	}
 
-	public void add(ModContainerImpl modContainer, String key, EntrypointMetadata metadata, Map<String, LanguageAdapter> adapterMap) throws Exception {
+	public void add(ModContainerImpl modContainer, String key, EntrypointMetadata metadata, Map<String, Supplier<LanguageAdapter>> adapterMap) throws Exception {
 		if (!adapterMap.containsKey(metadata.getAdapter())) {
 			throw new Exception("Could not find adapter '" + metadata.getAdapter() + "' (mod " + modContainer.getMetadata().getId() + "!)");
 		}