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