Hi!

I see from August 10, 2011 that you merged many things from your Android branch over to the trunk, so that CEDET now has greater support for Java (among other things).  Thanks!  In your notice, you wrote,

"If you just do Java w/out Android, you can setup your classpath in Emacs, and also enjoy full smart completion on a wide array of syntaxes."

What exactly does this mean?  For instance the only place I see in Emacs (really, in CEDET) to set up a classpath is semanticdb-javap-classpath.  Is that what you're referring to?  Is this all that's needed, or are there other steps that are needed?  For instance, I have not (yet) set up any specific EDE projects for my Java projects.  In the past, I'd used ede-cpp-root in order to specify :system-include-path, and that actually worked well at finding Java source files.  I also once subclassed ede-cpp-root to do essentially the same thing.  Is an EDE project still necessary?  Seems like it would be, though I wonder if I can get away with just using semanticdb-project-roots instead.  That never worked for me in the past, though I'm not sure why.

Thanks!
Cheers,
David

On Thu, Jul 14, 2011 at 4:35 AM, Eric M. Ludlam <ericludlam@gmail.com> wrote:
Semanticdb will always check the files to see if reparsing is necessary.
 There are some cases (usually labeled as 'fast' in the code) that will
skip that step, but all commands will do a full stat to be sure.

The exception is for back-ends that poll from a 3rd party tool like
global, which will update whenever global feels like updating.

Eric

On 07/13/2011 12:43 PM, Jai Dayal wrote:
> This might be out of context, but it might be more efficient than
> creating a new thread.
>
> When I create new header files, classes, etc, do I have to update the
> semanticdb some how, or is this done automatically?
>
> Jai
>
> On Wed, Jul 13, 2011 at 10:40 AM, David Ventimiglia <dventimi@gmail.com
> <mailto:dventimi@gmail.com>> wrote:
>
>     Hi Eric,
>
>     I was using ede-cpp-root for Java even though it's specific to C
>     files, since it had some of the desirable properties.  Namely, the
>     ability easily to define a project root, and the ability easily to
>     plug in system directories.  I didn't want to have the kind of EDE
>     project that relies on a particular file in every directory, like
>     the Makefiles you would have with recursive make.  Seems to me that
>     fits better with the way Java does things.  I'm not sure, but I
>     think the parts of ede-cpp-root that are the most C-specific relate
>     to defining and building targets.  If that's true, those are things
>     I don't much care about, since I have my own stuff for managing the
>     build.  Though, as you point out, it doesn't implement
>     ede-java-classpath.
>
>     I could try to make a Java-specific ede-java-root, or to use
>     ede-generic, whichever is more suitable for the task.  Mainly, I'd
>     like Emacs to have easy and reliable access to tags when visiting
>     Java files, in service of all the other stuff in CEDET that can make
>     use of tags.  ede-cpp-root works surprisingly well.  But as far as I
>     know, the only way it gets tags is to have semantic parse the source
>     files of all the includes, and it'd be nice also to be able to get
>     them from JAR files and class files, in a sort of seamless way.
>
>     I've used JDEE for years and years and know it to be very good.
>     Still, I think there'd be an appetite for a lightweight, pure-CEDET
>     solution for getting all the tags for Java file.
>
>     Anyway, so what your saying is, one option is to implement
>     ede-java-root and implement ede-java-classpath, is that correct?
>     Should I sub-class ede-cpp-root, or write ede-java-root from
>     scratch?  Could your Android project type be adapted into a generic
>     Java project type?
>
>     Thanks!
>     Cheers,
>     David
>
>
>
>
>
>
>     On Wed, Jul 13, 2011 at 4:26 AM, Eric M. Ludlam
>     <ericludlam@gmail.com <mailto:ericludlam@gmail.com>> wrote:
>
>         Hi,
>
>         ede-cpp-root is specific to C files, and doesn't implement the
>         EDE method ede-java-classpath.  I suppose it could, as it
>         wouldn't really need much else other than a slot to specify that
>         path in the main project class.
>
>         I expect it should be more generic a name than that, but that's
>         what we've got at the moment.
>
>         Anyway, I've always left the java project stuff to JDEE which
>         knows about classpaths and such, but I haven't linked to two
>         together.
>
>         Someone would need to created an ede-java-root project to build
>         something specific for java and its features.  Alternately,
>         someone could add some stuff to ede-generic if the build systems
>         for Java are particularly deterministic.  In either case, a
>         project needs to implement the classpath method, and so far,
>         only the android project does that because that's the only thing
>         I've tried to do so far.
>
>         Chasing either of the two EDE project types should be pretty
>         easy. There are good pre-existing examples in both cases.
>
>         Eric
>
>
>         On 07/12/2011 11:54 PM, David Ventimiglia wrote:
>
>             This is great!  How would I plug this into a
>             system-include-path for an
>             EDE project, to pull tags from, say, JAR files rather than
>             Java source
>             files.  Currently, I'm using an ede-cpp-root-project, with
>             :system-include-path having a list of directories that
>             contain Java
>             source files for various libaries and such.  But it's not always
>             convenient or possible to have the source code, so it would
>             be nice to
>             get the tags from compiled JAR files instead.
>
>             On Tue, Jul 12, 2011 at 7:49 PM, Eric M. Ludlam
>             <ericludlam@gmail.com <mailto:ericludlam@gmail.com>
>             <mailto:ericludlam@gmail.com <mailto:ericludlam@gmail.com>>>
>             wrote:
>
>                 On 07/12/2011 02:28 PM, David Ventimiglia wrote:
>
>                     Hi!
>
>                     How would I go about creating a new semanticdb
>             backend?  I
>                     wanted to see
>                     if I could create one for Java that uses javap as a
>             tag source.  Is
>                     there a recipe to follow?  I tried reading
>             semanticdb-global.el,
>                     and can
>                     continue to do that, but some guidance would be
>             extremely
>                     useful.  Thanks!
>
>
>                 You are in luck, this is implemented in
>             semanticdb-javap.el, and has
>                 worked ok for me.  Unfortunately, this is still in my
>             android branch
>                 in bzr, so it is not quite so easy to get at.
>
>                 The browsable tree is here:
>
>             http://cedet.bzr.sourceforge.____net/bzr/cedet/code/android/____files
>             <http://cedet.bzr.sourceforge.__net/bzr/cedet/code/android/__files
>             <http://cedet.bzr.sourceforge.net/bzr/cedet/code/android/files>>
>
>                 It depends on changes in the java parser on that branch
>             also.
>
>                 If you'd like to try out the android branch that
>             includes this, you
>                 can use bzr to download it.
>
>                 bzr checkout
>
>               bzr://cedet.bzr.sourceforge.____net/bzrroot/cedet/code/android
>             <http://cedet.bzr.sourceforge.__net/bzrroot/cedet/code/android
>             <http://cedet.bzr.sourceforge.net/bzrroot/cedet/code/android>__>
>             cedet
>
>
>                 I've hooked it up with default support for android, but
>             other types
>                 of classpaths are not in by default.  If anyone would
>             like to add
>                 such support, let me know.
>
>                 Good Luck
>                 Eric
>
>
>
>
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