Re: [cdi-dev] How about documenting Alternatives on producers ?

BTW, if I take the @Alternative producer out (so there is no more @Alternative) but leave the <alternative> element, the Weld error message is : WELD-001422: Enabled alternative <class>org.agoncal.cdi.PrefixProducer</class> in file:/beans.xml@7 is not an alternative Again, the error message is very "bean" oriented, don't you think ? Antonio On Tue, Oct 21, 2014 at 4:10 PM, Antonio Goncalves < antonio.goncalves(a)gmail.com&gt; wrote: > Hi all, > > I often use code such as the one below: one bean, two producers and one > producer is an alternative (not the bean) : > > *public class *PrefixProducer > { > @Produces > *public *String *prefixNonAlt *= *"non-alternative"*; > > @Produces > * @Alternative* > *public *String *prefixAlt *= *"alternative"*; > } > > I enable the alternative, as usual, by declaring the bean in the > beans.xml : > > <*alternatives*> > <*class*>org.agoncal.cdi.PrefixProducer</*class*> > </*alternatives*> > > This works fine, no problem. But I just realized that Intellij IDEA > displays the warning "Alternative class expected here". I've looked around, > read the spec, the Weld documentation, and didn't find any example of the > code above. I think people are unware of this. The only reference of > alternative producers I found is in the spec : > > *5.1.1.2* > *An alternative is selected for the bean archive if either:* > > ** the alternative is a producer method, field or resource, and the bean > class that declares the method or field is listed* > > I think for such easy use cases (i.e PrefixProducer) there is no need to > multiply beans, so the code is fine and easy to read. But the code you see > around, tend to multiply beans (people think that Alternatives are *only* > for beans, not for producers). > > Shouldn't the spec/Weld documentation mention this case a bit more often, > by giving an example ? > > WDYT ? > > Antonio > > > > > > > > > > > _______________________________________________ > cdi-dev mailing list > cdi-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/cdi-dev > > Note that for all code provided on this list, the provider licenses the > code under the Apache License, Version 2 ( > http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas > provided on this list, the provider waives all patent and other > intellectual property rights inherent in such information. > -- Antonio Goncalves Software architect, Java Champion and Pluralsight author Web site <http://www.antoniogoncalves.org> | Twitter <http://twitter.com/agoncal> | LinkedIn <http://www.linkedin.com/in/agoncal> | Pluralsight <http://pluralsight.com/training/Authors/Details/antonio-goncalves> | Paris JUG <http://www.parisjug.org> | Devoxx France <http://www.devoxx.fr>