Add support for obtaining all registries

src/main/java/ch/njol/skript/ModernSkriptBridge.java

@@ -8,6 +8,7 @@
 import org.skriptlang.skript.util.Registry;
 
 import java.util.Collection;
+import java.util.List;
 import java.util.function.Supplier;
 
 /**
@@ -75,6 +76,11 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 			return unmodifiableSkript.registry(registryClass, putIfAbsent);
 		}
 
+		@Override
+		public Collection<Registry<?>> registries() {
+			return unmodifiableSkript.registries();
+		}
+
 		@Override
 		public SyntaxRegistry syntaxRegistry() {
 			return unmodifiableSkript.syntaxRegistry();

src/main/java/ch/njol/skript/SkriptAddon.java

@@ -2,6 +2,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.Collection;
 import java.util.function.Supplier;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -154,6 +155,11 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 		return addon.registry(registryClass, putIfAbsent);
 	}
 
+	@Override
+	public Collection<Registry<?>> registries() {
+		return addon.registries();
+	}
+
 	@Override
 	public SyntaxRegistry syntaxRegistry() {
 		return addon.syntaxRegistry();

src/main/java/org/skriptlang/skript/SkriptImpl.java

@@ -13,6 +13,7 @@
 
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Supplier;
@@ -65,6 +66,11 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 		return (R) registries.computeIfAbsent(registryClass, key -> putIfAbsent.get());
 	}
 
+	@Override
+	public Collection<Registry<?>> registries() {
+		return List.copyOf(registries.values());
+	}
+
 	/*
 	 * SkriptAddon Management
 	 */
@@ -181,6 +187,11 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 			return skript.registry(registryClass, putIfAbsent);
 		}
 
+		@Override
+		public Collection<Registry<?>> registries() {
+			return skript.registries();
+		}
+
 		@Override
 		public SyntaxRegistry syntaxRegistry() {
 			return registry(SyntaxRegistry.class);
@@ -256,6 +267,11 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 			return unmodifiableAddon.registry(registryClass, putIfAbsent);
 		}
 
+		@Override
+		public Collection<Registry<?>> registries() {
+			return unmodifiableAddon.registries();
+		}
+
 		@Override
 		public SyntaxRegistry syntaxRegistry() {
 			return unmodifiableAddon.syntaxRegistry();

src/main/java/org/skriptlang/skript/addon/SkriptAddon.java

@@ -8,6 +8,7 @@
 import org.skriptlang.skript.util.ViewProvider;
 
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 import java.util.function.Supplier;
 
@@ -72,6 +73,11 @@ public interface SkriptAddon extends ViewProvider<SkriptAddon> {
 	 */
 	<R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> putIfAbsent);
 
+	/**
+	 * @return A collection of all registries accessible through this addon.
+	 */
+	Collection<Registry<?>> registries();
+
 	/**
 	 * @return A syntax registry for this addon's syntax.
 	 */

src/main/java/org/skriptlang/skript/addon/SkriptAddonImpl.java

@@ -5,6 +5,7 @@
 import org.skriptlang.skript.util.Registry;
 import org.skriptlang.skript.util.ViewProvider;
 
+import java.util.Collection;
 import java.util.function.Supplier;
 
 class SkriptAddonImpl {
@@ -47,9 +48,9 @@ public boolean hasRegistry(Class<? extends Registry<?>> registryClass) {
 		@Override
 		public <R extends Registry<?>> R registry(Class<R> registryClass) {
 			R registry = addon.registry(registryClass);
-			if (registry instanceof ViewProvider) {
+			if (registry instanceof ViewProvider<?> viewProvider) {
 				//noinspection unchecked
-				registry = ((ViewProvider<R>) registry).unmodifiableView();
+				registry = (R) viewProvider.unmodifiableView();
 			}
 			return registry;
 		}
@@ -59,6 +60,18 @@ public <R extends Registry<?>> R registry(Class<R> registryClass, Supplier<R> pu
 			throw new UnsupportedOperationException("Cannot store registries on an unmodifiable addon");
 		}
 
+		@Override
+		public Collection<Registry<?>> registries() {
+			return addon.registries().stream()
+				.map(registry -> {
+					if (registry instanceof ViewProvider<?> viewProvider) {
+						return (Registry<?>) viewProvider.unmodifiableView();
+					}
+					return registry;
+				})
+				.toList();
+		}
+
 		@Override
 		public SyntaxRegistry syntaxRegistry() {
 			return addon.syntaxRegistry().unmodifiableView();

src/test/java/org/skriptlang/skript/addon/BaseSkriptAddonTests.java

@@ -80,6 +80,10 @@ public void testRegistry() {
 		assertEquals(registry, unmodifiable.registry(MockRegistry.class));
 		assertTrue(addon.hasRegistry(MockRegistry.class));
 		assertTrue(unmodifiable.hasRegistry(MockRegistry.class));
+
+		// access all registries
+		assertTrue(addon.registries().contains(registry));
+		assertTrue(unmodifiable.registries().contains(registry));
 	}
 
 	@Test
@@ -91,6 +95,10 @@ public void testSyntaxRegistry() {
 		assertNotNull(unmodifiable.syntaxRegistry());
 		// unmodifiable's syntax registry should be unmodifiable (different)
 		assertNotEquals(addon.syntaxRegistry(), unmodifiable.syntaxRegistry());
+		assertNotEquals(addon.syntaxRegistry(), unmodifiable.registries().stream()
+			.filter(registry -> registry instanceof SyntaxRegistry)
+			.findFirst()
+			.orElseThrow());
 	}
 
 	@Test