Defensive handling of exceptions during factory method type checking

Also using ClassUtils.forName in AutowireUtils now in order to accept all common class name formats.

Issue: SPR-11034

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

@@ -667,33 +667,40 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
 					factoryMethod.getParameterTypes().length >= minNrOfArgs) {
 				// No declared type variables to inspect, so just process the standard return type.
 				if (factoryMethod.getTypeParameters().length > 0) {
-					// Fully resolve parameter names and argument values.
-					Class<?>[] paramTypes = factoryMethod.getParameterTypes();
-					String[] paramNames = null;
-					ParameterNameDiscoverer pnd = getParameterNameDiscoverer();
-					if (pnd != null) {
-						paramNames = pnd.getParameterNames(factoryMethod);
-					}
-					ConstructorArgumentValues cav = mbd.getConstructorArgumentValues();
-					Set<ConstructorArgumentValues.ValueHolder> usedValueHolders =
-							new HashSet<ConstructorArgumentValues.ValueHolder>(paramTypes.length);
-					Object[] args = new Object[paramTypes.length];
-					for (int i = 0; i < args.length; i++) {
-						ConstructorArgumentValues.ValueHolder valueHolder = cav.getArgumentValue(
-								i, paramTypes[i], (paramNames != null ? paramNames[i] : null), usedValueHolders);
-						if (valueHolder == null) {
-							valueHolder = cav.getGenericArgumentValue(null, null, usedValueHolders);
+					try {
+						// Fully resolve parameter names and argument values.
+						Class<?>[] paramTypes = factoryMethod.getParameterTypes();
+						String[] paramNames = null;
+						ParameterNameDiscoverer pnd = getParameterNameDiscoverer();
+						if (pnd != null) {
+							paramNames = pnd.getParameterNames(factoryMethod);
+						}
+						ConstructorArgumentValues cav = mbd.getConstructorArgumentValues();
+						Set<ConstructorArgumentValues.ValueHolder> usedValueHolders =
+								new HashSet<ConstructorArgumentValues.ValueHolder>(paramTypes.length);
+						Object[] args = new Object[paramTypes.length];
+						for (int i = 0; i < args.length; i++) {
+							ConstructorArgumentValues.ValueHolder valueHolder = cav.getArgumentValue(
+									i, paramTypes[i], (paramNames != null ? paramNames[i] : null), usedValueHolders);
+							if (valueHolder == null) {
+								valueHolder = cav.getGenericArgumentValue(null, null, usedValueHolders);
+							}
+							if (valueHolder != null) {
+								args[i] = valueHolder.getValue();
+								usedValueHolders.add(valueHolder);
+							}
 						}
-						if (valueHolder != null) {
-							args[i] = valueHolder.getValue();
-							usedValueHolders.add(valueHolder);
+						Class<?> returnType = AutowireUtils.resolveReturnTypeForFactoryMethod(
+								factoryMethod, args, getBeanClassLoader());
+						if (returnType != null) {
+							cache = true;
+							returnTypes.add(returnType);
 						}
 					}
-					Class<?> returnType = AutowireUtils.resolveReturnTypeForFactoryMethod(
-							factoryMethod, args, getBeanClassLoader());
-					if (returnType != null) {
-						cache = true;
-						returnTypes.add(returnType);
+					catch (Throwable ex) {
+						if (logger.isDebugEnabled()) {
+							logger.debug("Failed to resolve generic return type for factory method: " + ex);
+						}
 					}
 				}
 				else {

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

@@ -223,7 +223,8 @@ abstract class AutowireUtils {
 							return typedValue.resolveTargetType(classLoader);
 						}
 						catch (ClassNotFoundException ex) {
-							throw new IllegalStateException("Failed to resolve typed value", ex);
+							throw new IllegalStateException("Failed to resolve value type [" +
+									typedValue.getTargetTypeName() + "] for factory method argument", ex);
 						}
 					}
 					// Only consider argument type if it is a simple value...
@@ -254,11 +255,11 @@ abstract class AutowireUtils {
 								}
 								if (className != null) {
 									try {
-										return classLoader.loadClass(className);
+										return ClassUtils.forName(className, classLoader);
 									}
 									catch (ClassNotFoundException ex) {
-										throw new IllegalStateException(
-												"Could not resolve specified class name argument [" + arg + "]", ex);
+										throw new IllegalStateException("Could not resolve class name [" + arg +
+												"] for factory method argument", ex);
 									}
 								}
 								// Consider adding logic to determine the class of the typeArg, if possible.

spring-beans/src/test/java/org/springframework/beans/factory/support/BeanFactoryGenericsTests.java

@@ -735,6 +735,23 @@ public class BeanFactoryGenericsTests {
 		assertEquals(1, beans.size());
 	}
 
+	@Test
+	public void parameterizedInstanceFactoryMethodWithInvalidClassName() {
+		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();
+
+		RootBeanDefinition rbd = new RootBeanDefinition(MocksControl.class);
+		bf.registerBeanDefinition("mocksControl", rbd);
+
+		rbd = new RootBeanDefinition();
+		rbd.setFactoryBeanName("mocksControl");
+		rbd.setFactoryMethodName("createMock");
+		rbd.getConstructorArgumentValues().addGenericArgumentValue("x");
+		bf.registerBeanDefinition("mock", rbd);
+
+		Map<String, Runnable> beans = bf.getBeansOfType(Runnable.class);
+		assertEquals(0, beans.size());
+	}
+
 	@Test
 	public void parameterizedInstanceFactoryMethodWithIndexedArgument() {
 		DefaultListableBeanFactory bf = new DefaultListableBeanFactory();