I think this would be the case if the outside repository was not a reusable 
component, but specific for our needs. The linked mapper-xml project is used by 
the J2CL community. It was previously outside of KIE for this reason, but 
dragged in due to reasons and I can not remember the details.

It needs to be removed outside due to this license issue. This might apply to 
the entire j2cl-tools repo. By a quick look, nothing in that repo is specific 
to KIE and reusable by J2CL community. 

It might even need to be split into several repositories. I see Jakarta bits 
are under Eclipse Public License. GPL can "eat" Apache, not sure if it same 
goes for EPL. 

Toni

On 2025/07/04 09:05:36 Alex Porcelli wrote:
> My concern is that moving all GPL code into an outside repository
> maintained by a committer might not be the right solution, as it gives
> me the impression that we are using a shadow organization to solve
> issues.
> 
> I'd be cautious with such an option.
> 
> -
> Alex
> 
> On Fri, Jul 4, 2025 at 3:57 AM Toni Rikkola <rikk...@apache.org> wrote:
> >
> > Any project using code from GPL becomes GPL.
> > https://www.apache.org/licenses/GPL-compatibility.html
> >
> > However there is a linking exception.
> > https://openjdk.org/legal/gplv2+ce.html
> > https://en.wikipedia.org/wiki/GPL_linking_exception
> >
> > So the project maintained by Dmitrii is fine as a dependency, but it should 
> > change the license to GPL. It can not avoid copying GPL code, so it becomes 
> > a GPL licensed project.
> >
> > We are already linking that project on Java side. This would be the same 
> > for GWT/frontend side.
> >
> > Toni
> >
> > On 2025/07/03 17:16:23 Alex Porcelli wrote:
> > > Dmitri, I’d argue that your library faces a similar issue to ours. While 
> > > on
> > > the surface it may be labeled as ASL-licensed, it doesn’t take much 
> > > digging
> > > to find source code under different licenses included within.
> > >
> > > Given that a member of Apache KIE maintains it, it could appear as a
> > > workaround to the broader problem, essentially externalizing non-compliant
> > > components to a shadow organization.
> > >
> > > On Thu, Jul 3, 2025 at 12:47 PM Dmitrii Tikhomirov
> > > <dtikh...@redhat.com.invalid> wrote:
> > >
> > > > If the problem lies with the EMF marshaller, we can migrate to an
> > > > annotation-based XML marshaller that’s compatible with the JRE/J2CL/GWT 
> > > > I
> > > > support
> > > >
> > > >
> > > >
> > > >
> > > > j2cl-tools/mapper-xml at main · kiegroup/j2cl-tools
> > > > <https://github.com/kiegroup/j2cl-tools/tree/main/mapper-xml>
> > > > github.com <https://github.com/kiegroup/j2cl-tools/tree/main/mapper-xml>
> > > > [image: apple-touch-icon-180x180-a80b8e11abe2.png]
> > > > <https://github.com/kiegroup/j2cl-tools/tree/main/mapper-xml>
> > > > <https://github.com/kiegroup/j2cl-tools/tree/main/mapper-xml>
> > > >
> > > >
> > > >
> > > > On Jul 3, 2025, at 8:35 AM, Toni Rikkola <rikk...@apache.org> wrote:
> > > >
> > > > I hope we have the experts to give a more detailed answer, but the goal
> > > > has been to have one parser on both ends. Client and server. I suspect 
> > > > that
> > > > is the case here.
> > > >
> > > > So that gives us another solution. Using different one on client side.
> > > >
> > > > Also finding a solution is one thing. Another is finding someone to
> > > > implement it.
> > > >
> > > > Toni
> > > >
> > > > On 2025/07/03 15:26:49 Francisco Javier Tirado Sarti wrote:
> > > >
> > > > Hi,
> > > > Im lacking context, but why these classes are even needed if GWT has a
> > > > dedicated xml parser?
> > > >
> > > > On Thu, Jul 3, 2025 at 5:24 PM Toni Rikkola <rikk...@apache.org> wrote:
> > > >
> > > > It is both a stub and not, it has some parts that are identical. Since
> > > > that is how you would write the code for the solution. Looking at the
> > > > current source it is clear we have a copy & paste with few changes.
> > > >
> > > > Comparing the two files we are almost 1:1. Our version has the unneeded
> > > > methods commented out, but even the comments are clear copy of the 
> > > > source.
> > > >
> > > > For an easy fix. I suspect javax.xml.XMLGregorianCalendar name, package
> > > > and even partial implementation break a license. Not sure how this 
> > > > works,
> > > > since when writing unit tests for example, you might do a dummy
> > > > implementation of a class. Is that still a problem?
> > > >
> > > > Then there are other tricks. We can generate a file that matches all 
> > > > these
> > > > requirements for the compiler. We could download the real source. Filter
> > > > the methods out we do not want, replace the ones we need to replace and
> > > > write a temp file for the GWT compiler.
> > > >
> > > > Problem is I do not know what is good enough.
> > > >
> > > > Toni
> > > >
> > > > On 2025/07/03 15:16:29 Francisco Javier Tirado Sarti wrote:
> > > >
> > > > Hmm, if it is not a copy, but a stub to make GWT work, why is this a
> > > > license issue at all?
> > > >
> > > > On Thu, Jul 3, 2025 at 5:08 PM Toni Rikkola <rikk...@apache.org> wrote:
> > > >
> > > > One of the files is XMLGregorianCalendar.
> > > >
> > > >
> > > >
> > > >
> > > > https://stackoverflow.com/questions/26803294/how-to-write-a-gwt-customserializer-for-xmlgregoriancalendar
> > > >
> > > >
> > > > The implementation we have here (falsely claims it is under Apache
> > > >
> > > > license)
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > https://github.com/apache/incubator-kie-tools/blob/b6658df8b9f187c0c5fdecfc6517a640d823823f/packages/stunner-editors/kie-wb-common-stunner/kie-wb-common-stunner-sets/kie-wb-common-stunner-bpmn/kie-wb-common-stunner-bpmn-emf/src/main/java/org/eclipse/emul/javax/xml/datatype/XMLGregorianCalendar.java#L21
> > > >
> > > >
> > > > Is used since without it GWT can not compile. There is no version of
> > > >
> > > > it in
> > > >
> > > > GWT source. GWT needs a class with that name from that package and with
> > > > each method implemented that our files use. And that implementation is
> > > > licensed under another source.
> > > >
> > > > The XMLGregorianCalendar we have is not a copy of the original. It is
> > > >
> > > > our
> > > >
> > > > version that works once GWT has compiled, but I am not sure if that is
> > > > enough to get rid of the copyright/licensing issue.
> > > >
> > > > Toni
> > > >
> > > > On 2025/07/03 15:06:29 Alex Porcelli wrote:
> > > >
> > > > "Ok, and there is not any hook we can use to download the source
> > > >
> > > > files
> > > >
> > > > from
> > > >
> > > > their original repo before GWT analyzes the source?"
> > > >
> > > > This needs to be investigated; it sounds possible. Someone needs to
> > > > take on this investigation and, if possible, make all necessary
> > > > adjustments throughout the codebase.
> > > >
> > > > On Thu, Jul 3, 2025 at 11:04 AM Francisco Javier Tirado Sarti
> > > > <ftira...@redhat.com.invalid> wrote:
> > > >
> > > >
> > > > Ok, and there is not any hook we can use to download the source
> > > >
> > > > files
> > > >
> > > > from
> > > >
> > > > their original repo before GWT analyzes the source?
> > > >
> > > > On Thu, Jul 3, 2025 at 5:03 PM Alex Porcelli <a...@porcelli.me>
> > > >
> > > > wrote:
> > > >
> > > >
> > > > For transpiler it requires the source; GWT do not use binaries as
> > > >
> > > > source of
> > > >
> > > > transpilation.
> > > >
> > > >
> > > > -
> > > > Alex
> > > >
> > > >
> > > > On Thu, Jul 3, 2025 at 11:00 AM Francisco Javier Tirado Sarti
> > > > <ftira...@redhat.com.invalid> wrote:
> > > >
> > > > Yes, Im pretty sure these classes are used, but do we need to
> > > >
> > > > hold
> > > >
> > > > them
> > > >
> > > > in
> > > >
> > > > our repo? We cannot just download the jar on the fly (Im
> > > >
> > > > assuming
> > > >
> > > > somehow
> > > >
> > > > maven is not in place)?
> > > >
> > > > On Thu, Jul 3, 2025 at 4:57 PM Alex Porcelli <a...@porcelli.me
> > > >
> > > >
> > > > wrote:
> > > >
> > > >
> > > > Francisco,
> > > >
> > > > Those classes are used by EMF in BPMN editor; Dashbuilder is
> > > >
> > > > also
> > > >
> > > > impacted. Can't remove, feel free to try.
> > > >
> > > > On Thu, Jul 3, 2025 at 10:55 AM Francisco Javier Tirado Sarti
> > > > <ftira...@redhat.com.invalid> wrote:
> > > >
> > > >
> > > > Im not sure GWT really requires this copy of these classes
> > > >
> > > > in
> > > >
> > > > the
> > > >
> > > > repo
> > > >
> > > > if
> > > >
> > > > they are still in rt.jar.
> > > > So, this is the first thing to try (remove the java.xml
> > > >
> > > > clases  and
> > > >
> > > > see
> > > >
> > > > if
> > > >
> > > > DashBuilder is still working)
> > > > If not, and this copy is really required in order GWT to
> > > >
> > > > work
> > > >
> > > > (which
> > > >
> > > > will
> > > >
> > > > be a surprise), then either we remove DashBuilder or we
> > > >
> > > > refactor
> > > >
> > > > Dashbuilder to not use GWT (which I bet is a big change)
> > > >
> > > > On Thu, Jul 3, 2025 at 4:51 PM Yeser Amer <
> > > >
> > > > ya...@apache.org>
> > > >
> > > > wrote:
> > > >
> > > >
> > > > As far I remember:
> > > >
> > > > Serverless Workflow Editor: Is not using GWT anymore,
> > > >
> > > > they
> > > >
> > > > migrated
> > > >
> > > > it
> > > >
> > > > to
> > > >
> > > > J2CL (Please correct me If I'm wrong)
> > > >
> > > > Classic DMN, Scesim, BPMN Editor: We are replacing them
> > > >
> > > > with
> > > >
> > > > React-based
> > > >
> > > > version, I guess we're in the path to remove them in the
> > > >
> > > > next few
> > > >
> > > > months,
> > > >
> > > > it depends on the maturity level of the new editors (DMN
> > > >
> > > > Editor is
> > > >
> > > > indeed
> > > >
> > > > the most mature one)
> > > >
> > > > DashBuilder: It is, in my opinion, the real blocker at
> > > >
> > > > this
> > > >
> > > > point.
> > > >
> > > > We
> > > >
> > > > don't have any plan, committers and resources to remove
> > > >
> > > > GWT
> > > >
> > > > in
> > > >
> > > > DashBuilder
> > > >
> > > > and replace it with another technology.
> > > >
> > > > Yeser
> > > >
> > > > On 2025/07/03 14:31:27 Alex Porcelli wrote:
> > > >
> > > > - Who needs GWT?
> > > >
> > > > Whole dashbuilder, BPMN editor, Classic DMN editor,
> > > >
> > > > Serverless
> > > >
> > > > editor...
> > > >
> > > > etc
> > > >
> > > >
> > > > - Can we take the GWT modules out and maintain them
> > > >
> > > > outside of
> > > >
> > > > KIE?
> > > >
> > > >
> > > > -1 for this approach, this is not a good approach. It
> > > >
> > > > tries to
> > > >
> > > > hide
> > > >
> > > > things..
> > > >
> > > >
> > > > Sure, we should have releases going.. but we need
> > > >
> > > > comply.
> > > >
> > > > So we
> > > >
> > > > need
> > > >
> > > > fix.
> > > >
> > > >
> > > > On Thu, Jul 3, 2025 at 10:24 AM Toni Rikkola <
> > > >
> > > > rikk...@apache.org
> > > >
> > > >
> > > > wrote:
> > > >
> > > >
> > > > Who needs GWT?
> > > > Can we take the GWT modules out and maintain them
> > > >
> > > > outside of
> > > >
> > > > KIE?
> > > >
> > > > Does it have to be all GWT related code or just some
> > > >
> > > > of
> > > >
> > > > them?
> > > >
> > > >
> > > > I know the answer is likely "we need to rewrite X and
> > > >
> > > > Y", but
> > > >
> > > > we
> > > >
> > > > really should get the releases flowing. That means if a
> > > >
> > > > rewrite can
> > > >
> > > > be
> > > >
> > > > done
> > > >
> > > > in 2 months it is fine, longer than that we should give
> > > >
> > > > the
> > > >
> > > > modules
> > > >
> > > > the
> > > >
> > > > boot. We can always take them back later.
> > > >
> > > >
> > > > I say we release often, even if the releases are not
> > > >
> > > > perfect.
> > > >
> > > > Right
> > > >
> > > > now Drools core could release monthly, but rest of the
> > > >
> > > > project is
> > > >
> > > > slowing
> > > >
> > > > things down. I do not mean this in a bad way, just an
> > > >
> > > > example, and
> > > >
> > > > there
> > > >
> > > > are no hard feelings about this from anyone. Just it is
> > > >
> > > > everyone's
> > > >
> > > > best
> > > >
> > > > interest to release anything for users to try out as soon
> > > >
> > > > and often
> > > >
> > > > as
> > > >
> > > > possible.
> > > >
> > > >
> > > > Toni
> > > >
> > > > On 2025/07/03 14:05:03 Alex Porcelli wrote:
> > > >
> > > > This has been raised by PJ Fanning [1]. I haven't
> > > >
> > > > investigated
> > > >
> > > > the
> > > >
> > > > details yet, but I wanted to give a heads-up to the
> > > >
> > > > community
> > > >
> > > > members.
> > > >
> > > >
> > > > It looks like we won't be able to have more
> > > >
> > > > releases
> > > >
> > > > until we
> > > >
> > > > get
> > > >
> > > > rid of GWT.
> > > >
> > > >
> > > > [1] -
> > > >
> > > > https://github.com/apache/incubator-kie-tools/issues/3196
> > > >
> > > >
> > > > -
> > > > Alex
> > > >
> > > >
> > > >
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