Fix support for target arrays

This commits makes sure that a bean that produces an array can be
processed ahead of time. If the request target type is an array, its
component type is used.

Closes gh-31426

spring-beans/src/main/java/org/springframework/beans/factory/aot/DefaultBeanRegistrationCodeFragments.java

@@ -83,7 +83,7 @@ class DefaultBeanRegistrationCodeFragments implements BeanRegistrationCodeFragme
 			Assert.state(parent != null, "No parent available for inner bean");
 			target = parent.getBeanClass();
 		}
-		return ClassName.get(target);
+		return (target.isArray() ? ClassName.get(target.getComponentType()) : ClassName.get(target));
 	}
 
 	private Class<?> extractDeclaringClass(ResolvableType beanType, Executable executable) {

spring-beans/src/test/java/org/springframework/beans/factory/aot/DefaultBeanRegistrationCodeFragmentsTests.java

@@ -36,6 +36,7 @@ import org.springframework.beans.testfixture.beans.factory.aot.MockBeanRegistrat
 import org.springframework.beans.testfixture.beans.factory.aot.MockBeanRegistrationsCode;
 import org.springframework.beans.testfixture.beans.factory.aot.NumberFactoryBean;
 import org.springframework.beans.testfixture.beans.factory.aot.SimpleBean;
+import org.springframework.beans.testfixture.beans.factory.aot.SimpleBeanArrayFactoryBean;
 import org.springframework.beans.testfixture.beans.factory.aot.SimpleBeanConfiguration;
 import org.springframework.beans.testfixture.beans.factory.aot.SimpleBeanFactoryBean;
 import org.springframework.core.ResolvableType;
@@ -76,6 +77,13 @@ class DefaultBeanRegistrationCodeFragmentsTests {
 		assertTarget(createInstance(registeredBean).getTarget(registeredBean), SimpleBean.class);
 	}
 
+	@Test
+	void getTargetOnConstructorToPublicFactoryBeanProducingArray() {
+		RegisteredBean registeredBean = registerTestBean(SimpleBean[].class,
+				SimpleBeanArrayFactoryBean.class.getDeclaredConstructors()[0]);
+		assertTarget(createInstance(registeredBean).getTarget(registeredBean), SimpleBean.class);
+	}
+
 	@Test
 	void getTargetOnConstructorToPublicGenericFactoryBeanExtractTargetFromFactoryBeanType() {
 		ResolvableType beanType = ResolvableType.forClassWithGenerics(

spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/factory/aot/SimpleBeanArrayFactoryBean.java

@@ -0,0 +1,39 @@
+/*
+ * 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.beans.testfixture.beans.factory.aot;
+
+import org.springframework.beans.factory.FactoryBean;
+import org.springframework.beans.factory.config.AbstractFactoryBean;
+
+/**
+ * A public {@link FactoryBean} that produces an array of objects.
+ *
+ * @author Stephane Nicoll
+ */
+public class SimpleBeanArrayFactoryBean extends AbstractFactoryBean<SimpleBean[]> {
+
+	@Override
+	public Class<?> getObjectType() {
+		return SimpleBean[].class;
+	}
+
+	@Override
+	protected SimpleBean[] createInstance() throws Exception {
+		return new SimpleBean[0];
+	}
+
+}