Hi Akhilesh.
Unfortunately, the people who created this code are no
longer at Oracle, and this code hasn't been touched for a
long time so we don't really have experts in this area
anymore.
Lukas Jungmann, who works on JPA, had this to say about it:
I believe antlr2 is used only for
parsing EJB-QL queries (predates JPQL and is
related to CMP EJBs in EJB [2.0,3)); ie one version of
JPQL parser in
EclipseLink is build on top of antlr3
I don't think there is any other usage of antlr2
That matches my limited understanding of this code as well.
EJB CMP has largely been replaced by JPA so it may be
difficult to find others in the community who are familiar
with this code.
There are some EJB CMP tests in the quicklook tests, but I
believe most of the EJB CMP tests are part of the CTS (and
Jakarta EE TCK).
Running the CTS can be a challenge, but there are others who
can help with that. There are also EJB CMP dev tests
included with GlassFish, but I don't know their status.
See:
appserver/tests/appserv-tests/devtests/ejb/cmp
appserver/tests/v2-tests/appserv-tests/sqetests/ejb/cmp
appserver/tests/v2-tests/appserv-tests/devtests/cmp
The v2-tests in particular are probably no longer
functional.
Hope that helps.
Bill
Akhilesh
Tyagi wrote on 01/ 3/19 10:43 PM:
Hello All,
My first post in the group.
I have been trying my hand on this issue for
some time now. Mainly spent a good time on getting
to know anltr4. I have been trying to make changes
slowly. But more I am doing it, more I realize
that certain classes in effected modules i.e.
cmp-support-sqlstore and cmp-support-ejb shall
need a good overhaul or may be a complete re
write.
So I turned my attention to how exactly this
code around antlr2 is used. I see probably the
starting point is JQLC.java class and then there
are supporting classes. I do not see any unit
tests or anything (i have not run the quick look
tests yet; not sure if that shall me as it looks
more of integration test to me?)
The agenda of this mail is two fold:
- To understand what purpose antlr2 is serving
in the project? I could guess till now that its
all about JPQL quries and parsing them ? I might
be completely wrong here.
Can someone help me answer the second question
above ? Also, there might be some old emails or
material around this as well. If I can get hands
on that as well, it might be helpful.
Thank You,
Akhilesh
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