Add native hints for core annotations

Add `CoreAnnotationsRuntimeHintsRegistrar` to provide native hints
for `@Order` and `@AliasFor`.

Closes gh-28442

Author: philwebb

spring-core/src/main/java/org/springframework/core/annotation/CoreAnnotationsRuntimeHintsRegistrar.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2002-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.core.annotation;
+
+import java.util.function.Consumer;
+
+import org.springframework.aot.hint.MemberCategory;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeHint;
+
+/**
+ * {@link RuntimeHintsRegistrar} for core annotations.
+ *
+ * @author Phillip Webb
+ * @since 6.0
+ */
+class CoreAnnotationsRuntimeHintsRegistrar implements RuntimeHintsRegistrar {
+
+	private static final Consumer<TypeHint.Builder> HINT = builder -> builder.withMembers(
+			MemberCategory.INVOKE_DECLARED_METHODS);
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		hints.reflection().registerType(AliasFor.class, HINT);
+		hints.reflection().registerType(Order.class, HINT);
+	}
+
+}

spring-core/src/main/resources/META-INF/spring/aot.factories

@@ -0,0 +1,2 @@
+org.springframework.aot.hint.RuntimeHintsRegistrar=\
+org.springframework.core.annotation.CoreAnnotationsRuntimeHintsRegistrar

spring-core/src/test/java/org/springframework/core/annotation/CoreAnnotationsRuntimeHintsRegistrarTests.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2002-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.core.annotation;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.MemberCategory;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeReference;
+import org.springframework.core.io.support.SpringFactoriesLoader;
+import org.springframework.util.ClassUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link CoreAnnotationsRuntimeHintsRegistrar}.
+ *
+ * @author Phillip Webb
+ */
+class CoreAnnotationsRuntimeHintsRegistrarTests {
+
+	private RuntimeHints hints;
+
+	@BeforeEach
+	void setup() {
+		this.hints = new RuntimeHints();
+		SpringFactoriesLoader.forResourceLocation("META-INF/spring/aot.factories")
+				.load(RuntimeHintsRegistrar.class).forEach(registrar -> registrar
+						.registerHints(this.hints, ClassUtils.getDefaultClassLoader()));
+	}
+
+	@Test
+	void aliasForHasHints() {
+		assertThat(this.hints.reflection().getTypeHint(TypeReference.of(AliasFor.class)))
+				.satisfies((hint) -> assertThat(hint.getMemberCategories())
+						.containsExactly(MemberCategory.INVOKE_DECLARED_METHODS));
+	}
+
+	@Test
+	void orderAnnotationHasHints() {
+		assertThat(this.hints.reflection().getTypeHint(TypeReference.of(Order.class)))
+				.satisfies((hint) -> assertThat(hint.getMemberCategories())
+						.containsExactly(MemberCategory.INVOKE_DECLARED_METHODS));
+	}
+
+}