[weld-issues] [JBoss JIRA] Closed: (WELD-471) Weld SE, Instance<> and @New - NPE

Weld SE, Instance<> and @New - NPE ---------------------------------- Key: WELD-471 URL: https://jira.jboss.org/jira/browse/WELD-471 Project: Weld Issue Type: Bug Components: Built-in beans Affects Versions: 1.0.1.Final Reporter: Wujek Srujek Assignee: Nicklas Karlsson Priority: Minor Fix For: 1.0.2.CR1 For a bean: @ApplicationScoped public class SomeBean { private double d = Math.random(); public double getD() { return d; } } and an injection point: @Inject @New private Instance<SomeBean> i; and when I start Weld SE I get: Exception in thread "main" java.lang.NullPointerException at org.jboss.weld.util.Beans.getInitializerMethods(Beans.java:395) at org.jboss.weld.bean.AbstractClassBean.initInitializerMethods(AbstractClassBean.java:252) at org.jboss.weld.bean.AbstractClassBean.<init>(AbstractClassBean.java:164) at org.jboss.weld.bean.ManagedBean.<init>(ManagedBean.java:317) at org.jboss.weld.bean.NewManagedBean.<init>(NewManagedBean.java:66) at org.jboss.weld.bean.NewManagedBean.of(NewManagedBean.java:48) at org.jboss.weld.bootstrap.AbstractBeanDeployer.createNewManagedBean(AbstractBeanDeployer.java:244) at org.jboss.weld.bootstrap.BeanDeployer.createBeans(BeanDeployer.java:124) at org.jboss.weld.bootstrap.BeanDeployment.deployBeans(BeanDeployment.java:151) at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:377) at org.jboss.weld.environment.se.Weld.initialize(Weld.java:79) at org.jboss.weld.environment.se.StartMain.go(StartMain.java:45) at test.Test.main(Test.java:10) When I specify @New.value: @Inject @New(SomeBean.class) private Instance<SomeBean> i; it works. The exception is thrown from within Weld core somewhere. According to the API, @New.value is optional and "defaults the value to the declared type of the injection point", and for Instance, "the required type is the type parameter specified at the injection point". So I think it should be able to take the type parameter and not result in an error. Not sure about this. Anyways, NPE should be changed to some more descriptive and friendly exception, describing what is wrong. Please see the forum topic: http://seamframework.org/Community/WeldSEInstanceAndNewNPE