Obscure Exception can be improved.
----------------------------------
Key: QI-317
URL: http://issues.ops4j.org/browse/QI-317
Project: Qi4j
Issue Type: Improvement
Components: Core Runtime
Reporter: Niclas Hedhman
I accidentally used a @Structure instead of @Service injection scope;
{code}
@Structure
private Iterable<ServiceReference<TopicFactory>> factories;
{code}
which gives a wonderful ClassCastException;
{code}
java.lang.ClassCastException:
sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to
java.lang.Class
at
org.qi4j.runtime.injection.provider.StructureInjectionProviderFactory$StructureInjectionProvider.provideInjection(StructureInjectionProviderFactory.java:89)
at
org.qi4j.runtime.injection.provider.CachingInjectionProviderDecorator.provideInjection(CachingInjectionProviderDecorator.java:50)
{code}
which isn't that helpful.
Since none of the @Structure injectionTypes can be anything but a class, it
should convert the "Type type" in StructureInjectionProviderFactory:63 to a
Class after checking it to be a Class, and if not throw a
InvalidInjectionTypeException (or something to that extent).
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