Polish

Move hints registration to spring-beans, where the actual behavior is
implemented. We chose not to move this to
`AutowiredAnnotationBeanPostProcessor` for now, as this would require it
to implement another AOT-related interface and add too much noise for
this.

See gh-28614

spring-beans/src/main/java/org/springframework/beans/factory/annotation/JakartaAnnotationsRuntimeHintsRegistrar.java

@@ -0,0 +1,42 @@
+/*
+ * 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.beans.factory.annotation;
+
+import java.util.stream.Stream;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.support.RuntimeHintsUtils;
+import org.springframework.util.ClassUtils;
+
+/**
+ * {@link RuntimeHintsRegistrar} for Jakarta annotations.
+ * <p>Hints are only registered if Jakarta inject is on the classpath.
+ *
+ * @author Brian Clozel
+ */
+class JakartaAnnotationsRuntimeHintsRegistrar implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		if (ClassUtils.isPresent("jakarta.inject.Inject", classLoader)) {
+			Stream.of("jakarta.inject.Inject", "jakarta.inject.Qualifier").forEach(annotationType ->
+					RuntimeHintsUtils.registerAnnotation(hints, ClassUtils.resolveClassName(annotationType, classLoader)));
+		}
+	}
+
+}

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

@@ -1,2 +1,4 @@
 org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor=\
 org.springframework.beans.factory.aot.BeanRegistrationsAotProcessor
+org.springframework.aot.hint.RuntimeHintsRegistrar=\
+org.springframework.beans.factory.annotation.JakartaAnnotationsRuntimeHintsRegistrar

spring-beans/src/test/java/org/springframework/beans/factory/annotation/JakartaAnnotationsRuntimeHintsRegistrarTests.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.beans.factory.annotation;
+
+
+import jakarta.inject.Inject;
+import jakarta.inject.Qualifier;
+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.RuntimeHintsPredicates;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.beans.factory.aot.AotFactoriesLoader;
+import org.springframework.core.io.support.SpringFactoriesLoader;
+import org.springframework.util.ClassUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link JakartaAnnotationsRuntimeHintsRegistrar}.
+ * @author Brian Clozel
+ */
+class JakartaAnnotationsRuntimeHintsRegistrarTests {
+
+	private final RuntimeHints hints = new RuntimeHints();
+
+	@BeforeEach
+	void setup() {
+		SpringFactoriesLoader.forResourceLocation(AotFactoriesLoader.FACTORIES_RESOURCE_LOCATION)
+				.load(RuntimeHintsRegistrar.class).forEach(registrar -> registrar
+						.registerHints(this.hints, ClassUtils.getDefaultClassLoader()));
+	}
+
+	@Test
+	void jakartaInjectAnnotationHasHints() {
+		assertThat(RuntimeHintsPredicates.reflection().onType(Inject.class)
+				.withMemberCategory(MemberCategory.INVOKE_DECLARED_METHODS)).accepts(this.hints);
+	}
+
+	@Test
+	void jakartaQualifierAnnotationHasHints() {
+		assertThat(RuntimeHintsPredicates.reflection().onType(Qualifier.class)
+				.withMemberCategory(MemberCategory.INVOKE_DECLARED_METHODS)).accepts(this.hints);
+	}
+
+}