Fix AOT processing for lazy-loading Jdk proxies.

This commit makes sure to use the ProxyFactory for retrieving the proxied interfaces. This makes sure to capture the exact interface order required when finally loading the proxy at runtime.

Original pull request: #4352
Closes #4351

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/aot/LazyLoadingProxyAotProcessor.java

@@ -18,6 +18,7 @@ package org.springframework.data.mongodb.aot;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
@@ -25,7 +26,6 @@ import java.util.Set;
 import org.springframework.aot.generate.GenerationContext;
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.TypeReference;
-import org.springframework.core.ResolvableType;
 import org.springframework.core.annotation.AnnotatedElementUtils;
 import org.springframework.core.annotation.MergedAnnotations;
 import org.springframework.data.annotation.Reference;
@@ -33,7 +33,6 @@ import org.springframework.data.mongodb.core.convert.LazyLoadingProxyFactory;
 import org.springframework.data.mongodb.core.convert.LazyLoadingProxyFactory.LazyLoadingInterceptor;
 import org.springframework.data.mongodb.core.mapping.DBRef;
 import org.springframework.data.mongodb.core.mapping.DocumentReference;
-import org.springframework.data.util.TypeUtils;
 
 /**
  * @author Christoph Strobl
@@ -66,9 +65,7 @@ public class LazyLoadingProxyAotProcessor {
 					if (field.getType().isInterface()) {
 
 						List<Class<?>> interfaces = new ArrayList<>(
-								TypeUtils.resolveTypesInSignature(ResolvableType.forField(field, type)));
+								Arrays.asList(LazyLoadingProxyFactory.prepareFactory(field.getType()).getProxiedInterfaces()));
-
-						interfaces.add(0, org.springframework.data.mongodb.core.convert.LazyLoadingProxy.class);
 						interfaces.add(org.springframework.aop.SpringProxy.class);
 						interfaces.add(org.springframework.aop.framework.Advised.class);
 						interfaces.add(org.springframework.core.DecoratingProxy.class);

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/LazyLoadingProxyFactory.java

@@ -90,7 +90,14 @@ public final class LazyLoadingProxyFactory {
 				.getProxyClass(LazyLoadingProxy.class.getClassLoader());
 	}
 
-	private ProxyFactory prepareProxyFactory(Class<?> propertyType, Supplier<LazyLoadingInterceptor> interceptor) {
+	/**
+	 * Create the {@link ProxyFactory} for the given type, already adding required additional interfaces.
+	 *
+	 * @param propertyType the type to proxy
+	 * @return the proxy type.
+	 * @since 4.0.5
+	 */
+	public static ProxyFactory prepareFactory(Class<?> propertyType) {
 
 		ProxyFactory proxyFactory = new ProxyFactory();
 
@@ -100,6 +107,13 @@ public final class LazyLoadingProxyFactory {
 
 		proxyFactory.addInterface(LazyLoadingProxy.class);
 		proxyFactory.addInterface(propertyType);
+
+		return proxyFactory;
+	}
+
+	private ProxyFactory prepareProxyFactory(Class<?> propertyType, Supplier<LazyLoadingInterceptor> interceptor) {
+
+		ProxyFactory proxyFactory = prepareFactory(propertyType);
 		proxyFactory.addAdvice(interceptor.get());
 
 		return proxyFactory;

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/aot/LazyLoadingProxyAotProcessorUnitTests.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 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.data.mongodb.aot;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.aot.generate.ClassNameGenerator;
+import org.springframework.aot.generate.DefaultGenerationContext;
+import org.springframework.aot.generate.GenerationContext;
+import org.springframework.aot.generate.InMemoryGeneratedFiles;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.data.mongodb.core.mapping.DBRef;
+import org.springframework.javapoet.ClassName;
+
+/**
+ * @author Christoph Strobl
+ */
+class LazyLoadingProxyAotProcessorUnitTests {
+
+	@Test // GH-4351
+	void registersProxyForLazyDbRefCorrectlyWhenTypeIsCollectionInterface() {
+
+		GenerationContext ctx = new DefaultGenerationContext(new ClassNameGenerator(ClassName.get(this.getClass())),
+				new InMemoryGeneratedFiles());
+
+		new LazyLoadingProxyAotProcessor().registerLazyLoadingProxyIfNeeded(A.class, ctx);
+
+		assertThat(ctx.getRuntimeHints())
+				.satisfies(RuntimeHintsPredicates.proxies().forInterfaces(java.util.Collection.class,
+						org.springframework.data.mongodb.core.convert.LazyLoadingProxy.class, java.util.List.class,
+						org.springframework.aop.SpringProxy.class, org.springframework.aop.framework.Advised.class,
+						org.springframework.core.DecoratingProxy.class)::test);
+	}
+
+	static class A {
+
+		String id;
+
+		@DBRef(lazy = true) //
+		List<B> listRef;
+	}
+
+	static class B {
+		String id;
+	}
+}