spring provider accepting overridings from jars

Provider.java

public class Provider extends SpringProvider {
    private static final Logger logger = LoggerFactory.getLogger(Provider.class);

    @Override
    protected SpringBasedContainer getContainer() {
        final SpringBasedContainer delegate = super.getContainer();
        final ConfigurableWebApplicationContext parentContext = new Mirror().on(delegate).get().field("parentContext");
        return new SpringBasedContainer(parentContext) {
            @Override 
            public <T> T instanceFor(Class<T> type) {
                try {
                    return delegate.instanceFor(type)
                } catch (NoSuchBeanDefinitionException e) {
                    Map<String, T> beans = parentContext.getBeansOfType(type);
                    for (Entry<String, T> def : beans.entrySet()) {
                        BeanDefinition definition = parentContext.getBeanFactory().getBeanDefinition(def.getKey());
                        if (!cameFromJar(definition)) {
                            return def.getValue();
                        }
                    }
                    throw e;  
                } 
            }
            public boolean cameFromJar(BeanDefinition definition) {
                //Do the magic here!!!
            }
        }
    }   
}