Details
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Bug
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Resolution: Done
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Blocker
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3.0.3.Final
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None
Description
The following constellation leads to an NPE-Exception which aborts the startup process:
- A CDI-Bean inherits from an generic abstract class and
- overwrites their abstract method.
- The abstract method must return a typeparameter.
- The method of the CDI-Bean must have an InterceptorBinding-Annotation
Code-Snippets (full Implementation can be found in the Example.zip)
@ApplicationScoped public class CarRepairer extends Repairer<Car> { @Override // Without the transactional annotation the bean would be loaded. @Transactional public Car repair() { return new Car(); } } // Without generic, the bean would be loaded public abstract class Repairer<T> { // If this method would not be abstract, everything would be fine public abstract T repair(); }
Code-Snippets using generic inheritance(full Implementation can be found in the GenericInheritance.zip)
@ApplicationScoped public class CarRepairer extends Repairer<Car> { @Override // Without the transactional annotation the bean would be loaded. @Transactional public Car repair() { return new Car(); } } // Without generic, the bean would be loaded // Pullrequest https://github.com/weld/core/pull/1801 // does not help if generic inherits from another class. public abstract class Repairer<T extends Vehicle> { // If this method would not be abstract, everything would be fine public abstract T repair(); }
Exception:
Caused by: org.jboss.weld.exceptions.WeldException: WELD-001524: Unable to load proxy class for bean Managed Bean [class weldtest.CarRepairer] with qualifiers [@Any @Default] with class class weldtest.CarRepairer using classloader WebappClassLoader context: app#tcorder delegate: false at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:398) at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.createEnhancedSubclass(SubclassedComponentInstantiator.java:113) at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.initEnhancedSubclass(SubclassedComponentInstantiator.java:86) at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.<init>(SubclassedComponentInstantiator.java:79) at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.forInterceptedDecoratedBean(SubclassedComponentInstantiator.java:63) at org.jboss.weld.injection.producer.BeanInjectionTarget.initializeAfterBeanDiscovery(BeanInjectionTarget.java:121) at org.jboss.weld.injection.producer.InjectionTargetInitializationContext.initialize(InjectionTargetInitializationContext.java:42) at org.jboss.weld.injection.producer.InjectionTargetService.initialize(InjectionTargetService.java:63) at org.jboss.weld.bootstrap.WeldStartup.deployBeans(WeldStartup.java:465) at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:83) at org.jboss.weld.environment.servlet.WeldServletLifecycle.initialize(WeldServletLifecycle.java:236) at org.jboss.weld.environment.servlet.EnhancedListener.onStartup(EnhancedListener.java:62) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) ... 14 more Caused by: org.jboss.weld.exceptions.WeldException at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.addMethodsFromClass(InterceptedSubclassFactory.java:236) at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.addMethods(InterceptedSubclassFactory.java:119) at org.jboss.weld.bean.proxy.ProxyFactory.createProxyClass(ProxyFactory.java:477) at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:390) ... 27 more Caused by: java.lang.NullPointerException at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.createDelegateToSuper(InterceptedSubclassFactory.java:281) at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.createDelegateToSuper(InterceptedSubclassFactory.java:275) at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.createDelegateMethod(InterceptedSubclassFactory.java:459) at org.jboss.weld.bean.proxy.InterceptedSubclassFactory.addMethodsFromClass(InterceptedSubclassFactory.java:148) ... 30 more
