class attribute not resolved !

[ndeloof]

I'm getting some strange behaviour when using Spring from an ant task :

I use this simple code :

ApplicationContext context = new ClassPathXmlApplicationContext(
        "Designer-context.xml");

I've restricted my context to :

<beans>
    <bean id="reverse" class="java.lang.String"/>
</beans>

When I run my code from a "main", everything is ok, I get a bean in context of type String.

When I run it from a ANT task (minimalist : it only runs this simple code), I get an exception :

java.lang.IllegalStateException: Bean definition does not carry a resolved bean class
        at org.springframework.beans.factory.support.AbstractBeanDefinition.getBeanClass(AbstractBeanDefinition.java:205)

According to source code, this means beanClass in the BeanDefinition has not been converted to a class Object.

WHAT'S HAPPENING ???

[ndeloof]

After testing on a minimalist code, this seems to be a maven problem : my ANT task is used from a maven jelly script.