package com.algaworks.pedidovenda.util.cdi;
import java.util.Set;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public class CDIServiceLocator {
private static BeanManager getBeanManager() {
try {
InitialContext initialContext = new InitialContext();
return (BeanManager) initialContext.lookup("java:comp/env/BeanManager");
} catch (NamingException e) {
throw new RuntimeException("Não pôde encontrar BeanManager no JNDI.");
}
}
@SuppressWarnings("unchecked")
public static <T> T getBean(Class<T> clazz) {
BeanManager bm = getBeanManager();
Set<Bean<?>> beans = (Set<Bean<?>>) bm.getBeans(clazz);
if (beans == null || beans.isEmpty()) {
return null;
}
Bean<T> bean = (Bean<T>) beans.iterator().next();
CreationalContext<T> ctx = bm.createCreationalContext(bean);
T o = (T) bm.getReference(bean, clazz, ctx);
return o;
}
}