Retrieving beans using related generic class

[bryncooke]

Hi,

I wonder if anyone could clarify for me whether it should be possible to get a bean via related generic type or if the type should exactly match?

For instance:

     class Test implements ConfigurationProvider<ServletContext>

Should I be able to get the Test bean by selecting?

     Set<Bean<?>> beans = manager.getBeans(new ParameterizedTypeImpl(ConfigurationProvider.class, new Type[]{Object.class}, null)); //(Does not work on weld 2.1.0)

Or does the generic type have to exactly match?

     Set<Bean<?>> beans = manager.getBeans(new ParameterizedTypeImpl(ConfigurationProvider.class, new Type[]{ServletContext.class}, null));

Many thanks

Bryn

[jharting]

If the type parameter is actual it's raw type has to be identical with the raw type of the bean's type parameter. However, you can use a wildcard or a type variable as the type parameter. Make sure you check TypeLiteral. For example, to get the parameterized type ConfigurationProvider<?> you could do:

new TypeLiteral<ConfigurationProvider<?>>() {}.getType() and pass the result to getBeans().

[bryncooke]

That's great. Thanks for your help.

Bryn