Polishing

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClass.java

@@ -128,6 +128,7 @@ final class ConfigurationClass {
 	 * @param metadata the metadata for the underlying class to represent
 	 * @param beanName name of the {@code @Configuration} class bean
 	 * @param scanned whether the underlying class has been registered through a scan
+	 * @since 6.2
 	 */
 	ConfigurationClass(AnnotationMetadata metadata, String beanName, boolean scanned) {
 		Assert.notNull(beanName, "Bean name must not be null");

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassBeanDefinitionReader.java

@@ -18,10 +18,7 @@ package org.springframework.context.annotation;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
@@ -194,13 +191,19 @@ class ConfigurationClassBeanDefinitionReader {
 		AnnotationAttributes bean = AnnotationConfigUtils.attributesFor(metadata, Bean.class);
 		Assert.state(bean != null, "No @Bean annotation attributes");
 
-		// Consider name and any aliases
-		List<String> names = new ArrayList<>(Arrays.asList(bean.getStringArray("name")));
-		String beanName = (!names.isEmpty() ? names.remove(0) : methodName);
-
-		// Register aliases even when overridden
-		for (String alias : names) {
-			this.registry.registerAlias(beanName, alias);
+		// Consider name and any aliases.
+		String[] explicitNames = bean.getStringArray("name");
+		String beanName;
+		if (explicitNames.length > 0) {
+			beanName = explicitNames[0];
+			// Register aliases even when overridden below.
+			for (int i = 1; i < explicitNames.length; i++) {
+				this.registry.registerAlias(beanName, explicitNames[i]);
+			}
+		}
+		else {
+			// Default bean name derived from method name.
+			beanName = methodName;
 		}
 
 		// Has this effectively been overridden before (for example, via XML)?

spring-context/src/test/java/org/springframework/context/annotation/configuration/ConfigurationBeanNameTests.java

@@ -64,8 +64,7 @@ class ConfigurationBeanNameTests {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
 		ctx.setBeanNameGenerator(new AnnotationBeanNameGenerator() {
 			@Override
-			public String generateBeanName(
-					BeanDefinition definition, BeanDefinitionRegistry registry) {
+			public String generateBeanName(BeanDefinition definition, BeanDefinitionRegistry registry) {
 				return "custom-" + super.generateBeanName(definition, registry);
 			}
 		});
@@ -78,17 +77,22 @@ class ConfigurationBeanNameTests {
 		ctx.close();
 	}
 
+
 	@Configuration("outer")
 	@Import(C.class)
 	static class A {
+
 		@Component("nested")
 		static class B {
+
 			@Bean public String nestedBean() { return ""; }
 		}
 	}
 
+
 	@Configuration("imported")
 	static class C {
+
 		@Bean public String s() { return "s"; }
 	}
 

spring-context/src/test/java/org/springframework/context/annotation6/ComponentForScanning.java

@@ -20,4 +20,5 @@ import org.springframework.stereotype.Component;
 
 @Component
 public class ComponentForScanning {
+
 }

spring-context/src/test/java/org/springframework/context/annotation6/ConfigForScanning.java

@@ -22,8 +22,10 @@ import org.springframework.context.annotation.Configuration;
 
 @Configuration
 public class ConfigForScanning {
+
 	@Bean
 	public TestBean testBean() {
 		return new TestBean();
 	}
+
 }