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Sandeep, Joe<br>
<br>
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Joe,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">This did
come up in prior discussions wrt
GREAT. The idea there was to create templatized patterns that could be
instantiated
and reused in different transformation contexts. I am not sure to what
extent it
has been implemented – perhaps one of the core developers could comment
–</span></font></p>
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(I'm not a GR developer, I'm just chiming in if I might)<br>
<br>
This can _almost_ be done even with the current GReAT, I tried it once.<br>
(and I'm not sure if what's preventing you from doing it is actually a
bug or a feature).<br>
<br>
The idea is that you define your generic patterns on MgaObjects of a
very simplistic metamodel, and then use the<br>
LibraryUpdater to customize the patterns for your metamodel (i.e.
redirect MgaObj references). This part works.<br>
<br>
What does not work though is that you cannot create generic
connections, i.e. the pattern matcher does not recognize<br>
"Any" connections associated with MgaObjects. I can think of this as a
bug, since I'm not sure what ConnectorAny was <br>
intended for (if not for this - I know that connection inheritance is a
shady business in GReAT anyway, so I'm not sure).<br>
<br>
<br>
Tivadar<br>
<br>
<br>
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cite="mid7AB1C26C64423249964AB392C6EBF0E00515B5@discovery.isis.vanderbilt.edu"
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Thanks,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Sandeep</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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<p class="MsoAutoSig"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">--</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Times New Roman"
size="3"><span style="font-size: 12pt; color: navy;">Sandeep Neema</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Times New Roman"
size="3"><span style="font-size: 12pt; color: navy;">Research
Scientist,</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Times New Roman"
size="3"><span style="font-size: 12pt; color: navy;">Institute</span></font><font
color="navy"><span style="color: navy;"> of Software</span></font><font
color="navy"><span style="color: navy;"> Integrated Systems,
Vanderbilt University</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Times New Roman"
size="3"><span style="font-size: 12pt; color: navy;">Phone:
615-343-9996</span></font></p>
<p class="MsoAutoSig"><font color="navy" face="Times New Roman"
size="3"><span style="font-size: 12pt; color: navy;">Email: <a
href="mailto:sandeep.k.neema@vanderbilt.edu">sandeep.k.neema@vanderbilt.edu</a></span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font
face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma;">
<a class="moz-txt-link-abbreviated"
href="mailto:great-users-bounces@list.isis.vanderbilt.edu">great-users-bounces@list.isis.vanderbilt.edu</a>
[<a class="moz-txt-link-freetext"
href="mailto:great-users-bounces@list.isis.vanderbilt.edu">mailto:great-users-bounces@list.isis.vanderbilt.edu</a>]
<b><span style="font-weight: bold;">On Behalf Of </span></b>Joe
Porter<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, May 09,
2006 9:20
AM<br>
<b><span style="font-weight: bold;">To:</span></b> great-users<br>
<b><span style="font-weight: bold;">Subject:</span></b> [great-users]
Transformation idioms</span></font></p>
</div>
<p class="MsoNormal"><font face="Times New Roman" size="3"><span
style="font-size: 12pt;"> </span></font></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><font
face="Times New Roman" size="3"><span style="font-size: 12pt;">I have
a question:<br>
<br>
Looking at the approach and capabilities of the GReAT toolchain, it
seems like
you would want to have some common algorithmic idioms. I'm thinking of
things like finding disjoint subgraphs or spanning trees. One of the
examples also mentioned topological sort. I'm stretching a little here
since I
haven't used the tool, but this is a journey of understanding. Is
there a way to do that sort of thing generically for different
metamodels, or
are things like that even useful in practice? Or rather, have I missed
something regarding the approach? <br>
<br>
Hopefully all of you that use GReAT on a regular basis can steer me in
the
right direction.<br>
<br>
Thanks,<br>
-Joe Porter<br>
Southwest Research Institute</span></font></p>
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