[FIXED] Edit bean after creation, for class I can't modify the source of?

Issue

I have a spring bean which I need to change after it's created, but I don't have access to edit the source of the bean's class; so I can't use...

• init-method
• InitializingBean
• @PostConstruct

Is there some way I can detect when this bean is created by id in another class, then apply the change I need?

Thanks

Solution

You can implement BeanPostProcessor to apply your own custom logic.

Example:

public class UserPassAuthFilterBeanPostProcessor implements BeanPostProcessor {

    private String usernameParameter;
    private String passwordParameter;

    @Override
    public final Object postProcessAfterInitialization(final Object bean, final String beanName) {
        return bean;
    }

    @Override
    public final Object postProcessBeforeInitialization(final Object bean, final String beanName) {
        if (bean instanceof UsernamePasswordAuthenticationFilter) {
            final UsernamePasswordAuthenticationFilter filter = (UsernamePasswordAuthenticationFilter) bean; 
            filter.setUsernameParameter(getUsernameParameter());
            filter.setPasswordParameter(getPasswordParameter());
        }

        return bean;
    }
    //...
}

Answered By - amant singh