Same method filtering in ConstructorResolver and getTypeForFactoryMethod

Issue: SPR-16999

spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java

@@ -724,19 +724,18 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 		int minNrOfArgs =
 				(mbd.hasConstructorArgumentValues() ? mbd.getConstructorArgumentValues().getArgumentCount() : 0);
 		Method[] candidates = ReflectionUtils.getUniqueDeclaredMethods(factoryClass);
-		for (Method factoryMethod : candidates) {
-			if (Modifier.isStatic(factoryMethod.getModifiers()) == isStatic &&
-					factoryMethod.getName().equals(mbd.getFactoryMethodName()) &&
-					factoryMethod.getParameterCount() >= minNrOfArgs) {
+		for (Method candidate : candidates) {
+			if (Modifier.isStatic(candidate.getModifiers()) == isStatic && mbd.isFactoryMethod(candidate) &&
+					candidate.getParameterCount() >= minNrOfArgs) {
 				// Declared type variables to inspect?
-				if (factoryMethod.getTypeParameters().length > 0) {
+				if (candidate.getTypeParameters().length > 0) {
 					try {
 						// Fully resolve parameter names and argument values.
-						Class<?>[] paramTypes = factoryMethod.getParameterTypes();
+						Class<?>[] paramTypes = candidate.getParameterTypes();
 						String[] paramNames = null;
 						ParameterNameDiscoverer pnd = getParameterNameDiscoverer();
 						if (pnd != null) {
-							paramNames = pnd.getParameterNames(factoryMethod);
+							paramNames = pnd.getParameterNames(candidate);
 						}
 						ConstructorArgumentValues cav = mbd.getConstructorArgumentValues();
 						Set<ConstructorArgumentValues.ValueHolder> usedValueHolders = new HashSet<>(paramTypes.length);
@@ -753,9 +752,9 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 							}
 						}
 						Class<?> returnType = AutowireUtils.resolveReturnTypeForFactoryMethod(
-								factoryMethod, args, getBeanClassLoader());
-						uniqueCandidate = (commonType == null && returnType == factoryMethod.getReturnType() ?
-								factoryMethod : null);
+								candidate, args, getBeanClassLoader());
+						uniqueCandidate = (commonType == null && returnType == candidate.getReturnType() ?
+								candidate : null);
 						commonType = ClassUtils.determineCommonAncestor(returnType, commonType);
 						if (commonType == null) {
 							// Ambiguous return types found: return null to indicate "not determinable".
@@ -769,8 +768,8 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 					}
 				}
 				else {
-					uniqueCandidate = (commonType == null ? factoryMethod : null);
-					commonType = ClassUtils.determineCommonAncestor(factoryMethod.getReturnType(), commonType);
+					uniqueCandidate = (commonType == null ? candidate : null);
+					commonType = ClassUtils.determineCommonAncestor(candidate.getReturnType(), commonType);
 					if (commonType == null) {
 						// Ambiguous return types found: return null to indicate "not determinable".
 						return null;

spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java

@@ -22,6 +22,7 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 import javax.annotation.PostConstruct;
 
 import org.junit.Before;
@@ -809,6 +810,15 @@ public class ConfigurationClassPostProcessorTests {
 		assertSame(ctx.getBean(TestBean.class), bean.testBeans.get(0));
 	}
 
+	@Test
+	public void testMapInjectionFromSameConfigurationClass() {
+		ApplicationContext ctx = new AnnotationConfigApplicationContext(MapInjectionConfiguration.class);
+		MapInjectionConfiguration bean = ctx.getBean(MapInjectionConfiguration.class);
+		assertNotNull(bean.testBeans);
+		assertEquals(1, bean.testBeans.size());
+		assertSame(ctx.getBean(Runnable.class), bean.testBeans.get("testBean"));
+	}
+
 	@Test
 	public void testBeanLookupFromSameConfigurationClass() {
 		ApplicationContext ctx = new AnnotationConfigApplicationContext(BeanLookupConfiguration.class);
@@ -1566,6 +1576,23 @@ public class ConfigurationClassPostProcessorTests {
 		}
 	}
 
+	@Configuration
+	public static class MapInjectionConfiguration {
+
+		@Autowired
+		private Map<String, Runnable> testBeans;
+
+		@Bean
+		Runnable testBean() {
+			return () -> {};
+		}
+
+		// Unrelated, not to be considered as a factory method
+		private boolean testBean(boolean param) {
+			return param;
+		}
+	}
+
 	@Configuration
 	static abstract class BeanLookupConfiguration {