Hi Jan-Kees, I think it's ok for Apache projects to depend on external libraries that are not licensed under ASL 2.0. However that would be some extra dependencies for MyFaces and we try to minimize those. On the other hand the gain might worth it in this case imho if those libraries are deployed in common public Maven repositories.
Thank for your help with MyFaces 2.0 ~ Simon On Tue, Jan 6, 2009 at 3:32 PM, Jan-Kees van Andel < jankeesvanan...@gmail.com> wrote: > Hi, > > The JSF 2.0 spec requires an implementation to support several > annotations, like @ManagedBean. > Has anyone already thought of a possible implementation for this > requirement? > > IMHO, there is only one option, and that is scanning the classpath at > application startup, because you don't want the overhead with every EL > expression. > > But there are some issues with this: > First, what paths to scan? AFAIK the spec doesn't state the classpaths > to scan. I suppose only /WEB-INF/lib and /WEB-INF/classes need to be > checked, but I can't find it in the spec. > > And second, how to scan? Reading each *.class file, then creating a > Class instance and then using reflection to scan for annotations is > probably very expensive. Not only the processing time, but I think it > will also become a memory issue because every class in the classpath > will be loaded into memory. > Scanning the plain *.class files is probably not very practical. I > don't know, never tried it, but the class files I've seen don't look > very appealing. :-) > > It might be an idea to look at Scannotation, which is an open source > library for scanning jar files for annotations. It works quite good > and it has the advantage of being very efficient because it doesn't > use the default Class/Reflection mechanism. > http://sourceforge.net/projects/scannotation/ > The project homepage says it has an Apache 2.0 license, but at the > same time it has a dependency on Javassist (licensed LGPL or MPL) and > the source files don't contain any headers, so it may be not an > option. I don't know, IANAL. > > I was playing around with a @ManagedBean annotation parser, but It may > be a good idea to have a discussion on this subject since it probably > has some impact. > > What do you think? > > Regards, > Jan-Kees >
