Add missing reflection hint on MonetaryAmount

Fixes gh-31266

Author: bclozel

spring-context/src/main/java/org/springframework/format/support/DefaultFormattingConversionService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -37,8 +37,8 @@
  * as {@code DefaultConversionService} exposes its own
  * {@link DefaultConversionService#addDefaultConverters addDefaultConverters} method.
  *
- * <p>Automatically registers formatters for JSR-354 Money &amp; Currency, JSR-310 Date-Time
- * and/or Joda-Time 2.x, depending on the presence of the corresponding API on the classpath.
+ * <p>Automatically registers formatters for JSR-354 Money &amp; Currency and JSR-310 Date-Time
+ * depending on the presence of the corresponding API on the classpath.
  *
  * @author Chris Beams
  * @author Juergen Hoeller

spring-context/src/main/java/org/springframework/format/support/FormattingConversionServiceRuntimeHints.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2023 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.format.support;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeReference;
+
+/**
+ * {@link RuntimeHintsRegistrar} to register hints for {@link DefaultFormattingConversionService}.
+ *
+ * @author Brian Clozel
+ * @since 6.1
+ */
+class FormattingConversionServiceRuntimeHints implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		hints.reflection().registerType(TypeReference.of("javax.money.MonetaryAmount"));
+	}
+}

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

@@ -1,3 +1,6 @@
+org.springframework.aot.hint.RuntimeHintsRegistrar= \
+org.springframework.format.support.FormattingConversionServiceRuntimeHints
+
 org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor= \
 org.springframework.context.aot.ReflectiveProcessorBeanFactoryInitializationAotProcessor
 

spring-context/src/test/java/org/springframework/format/support/FormattingConversionServiceRuntimeHintsTests.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2002-2023 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.format.support;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.core.io.support.SpringFactoriesLoader;
+import org.springframework.util.ClassUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link FormattingConversionServiceRuntimeHints}.
+ * @author Brian Clozel
+ */
+class FormattingConversionServiceRuntimeHintsTests {
+
+	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 montearyAmountHasHints() {
+		assertThat(RuntimeHintsPredicates.reflection().onType(javax.money.MonetaryAmount.class)).accepts(this.hints);
+	}
+
+}