Enabling AOP breaks my dependency injection for a factory bean that takes a string - spring

Question

Enabling AOP breaks my dependency injection for a factory bean that takes a string.
Here's the fragment from the context file:
<aop:aspectj-autoproxy/>
<bean id="foo"
class="FooFactory"
p:url-ref="url"/>
<bean id="url" class="java.lang.String">
<constructor-arg value="#{ 'localhost:50131'}"/>
</bean>
Here's the factory bean.
public class FooFactory extends AbstractFactoryBean<Foo> {
private String url;
public void setUrl(final String url) {
this.url = url;
}
#Override
public Class<?> getObjectType() {
return Foo.class;
}
#Override
protected Foo createInstance() throws Exception {
Validate.notNull(url, "null URL");
return new FooFactory().createFoo(new String[]{url});
}
}
Here is the only declared aspect:
#Component
#Aspect
public class ProfilerAspect {
#Around("#target(org.springframework.stereotype.Controller) && args(model,..)")
public Object profileController(final ProceedingJoinPoint proceedingJoinPoint, final Model model) throws Throwable {
return proceedingJoinPoint.proceed();
}
}
And this is the exception
java.lang.IllegalStateException: Cannot convert value of type [$Proxy13 implementing java.io.Serializable,java.lang.Comparable,java.lang.CharSequence,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [java.lang.String] for property 'url': no matching editors or conversion strategy found

Answer 1

It seems, that it has to do with the #target designator in the pointcut expression. I can reproduce the behaviour with a simple setup similar to yours (with only a custom annotation in the pointcut). It works fine with a simple execution() designator though.
Unfortunatly, I have no idea why this causes Spring to proxy the String object.

Answer 2

<aop:aspectj-autoproxy/> doesn't perform proxying without a reason. Perhaps you declared some aspect whose pointcut includes Strings, therefore it have been proxied.