package org.jboss.seam.ioc.spring;
import org.jboss.seam.Component;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.core.Ordered;
/**
* Intercepts when spring attempts to obtain an instance of a bean. If the bean is a seam component then we retrieve the
* bean from seam to ensure it gets wrapped and managed by seam as well. This post processor must have a lower
* precedence than any spring autoproxy creators.
*
* @author youngm
*/
public class SeamComponentPostProcessor implements BeanPostProcessor, Ordered
{
private int order = Ordered.LOWEST_PRECEDENCE;
/**
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object,
* java.lang.String)
*/
public Object postProcessAfterInitialization(final Object bean, String beanName) throws BeansException
{
// Check to see if this bean is a component.
Component component = SpringComponent.forSpringBeanName(beanName);
// Not a spring component skip.
if (component == null || !(component instanceof SpringComponent))
{
return bean;
}
// If this bean is a FactoryBean only request the bean from Seam if the component is a FactoryBean as well
// The object created by the factory should come along later
if (bean instanceof FactoryBean && !FactoryBean.class.isAssignableFrom(component.getBeanClass()))
{
return bean;
}
// Wrap our bean instance in an object factory for the SpringComponent to use
SpringComponent.setObjectFactory(new ObjectFactory() {
public Object getObject() throws BeansException
{
return bean;
}
});
// Return the seam instance
return Component.getInstance(beanName, component.getScope());
}
/**
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object,
* java.lang.String)
*/
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException
{
return bean;
}
/**
* This post processor must run after any spring AutoProxyCreator
*
* @see org.springframework.core.Ordered#getOrder()
*/
public int getOrder()
{
return order;
}
/**
* @param order the order to set
*/
public void setOrder(int order)
{
this.order = order;
}
}