UML Forum Google Group

Questionnaire UML Class Diagrams

arjan.van.zadelh...@hotmail.com (Arjan van Zadelhoff) — Sun, 20 May 2012 09:54:19 UT

Hello everyone,

My name is Arjan van Zadelhoff and I'm a student in the University of
Leiden and I'm researching what developers find important when they
are looking at a class diagram. To answer this question I've made a
questionnaire and I need you help by answering this questionnaire.
Please help me by answering this questionnaire! The link is below:

Re: [UML Forum] 3D-Model Visualization

b...@stlcc.org (Bob Palank) — Mon, 14 May 2012 20:13:40 UT

I haven't seen 3D visualization in UML, but Hyperbolic tree systems have
been around for years and I think they would work nicely.
Bob
----- Original Message -----
To: <umlforum@googlegroups.com>
Sent: Friday, May 11, 2012 11:13 AM

Re: 3D-Model Visualization

jca...@acm.org (Jordi Cabot) — Fri, 11 May 2012 18:22:10 UT

I don't think there is any good UML 3D visualization tool but I know a
couple of prototypes (probably not mature enough for what you need but
you may want to take a look):

[link]
[link]

Jordi

--
Software modeling languages portal: [link]

Re: [UML Forum] 3D-Model Visualization

h.lah...@verizon.net (H. S. Lahman) — Fri, 11 May 2012 15:13:54 UT

Responding to ca_driba...

I don't know of any offhand, but I haven't been paying much attention
since retiring.

However, I am curious why you want such a tool. I can see how 3D
rendering would be kind of neat and it could provide a better
comprehension of, say, a Component Diagram describing a complex system's

3D-Model Visualization

ca_dr...@lavabit.com — Thu, 10 May 2012 08:36:39 UT

Hi!

I'm searching for a UML tool that can comprehensively 3D visualize a big
(class) diagram.

Something like a crossover between Google Sketchup and a proper modelling
tool - or a tool which uses an XMI export as a base for its 3D
visualization.
Ideally it would provide an interactive presentation mode (add layers,

Re: Re: [UML Forum] state pattern in UML

dgeorge83...@gmail.com (Dan George) — Thu, 10 May 2012 02:30:27 UT

You can also check out Miro Samek's Practical Statecharts in C/C++. The
book shows how to code many of the constructs supported by the UML with
Miro's Quantum Framework. The mappings are straight forward especially if
you limit the UML syntax to the Executable UML profile.
Dan

Re: [UML Forum] state pattern in UML

h.lah...@verizon.net (H. S. Lahman) — Wed, 09 May 2012 16:05:44 UT

Responding to dglaser...

Not really. The commercial translation transformation engines are pricey
because the venders have to recover a large investment (optimization is
a much tougher problem than a 3GL compiler). So they tend to treat that
stuff as proprietary.

However, I can describe one way to translate object state machines that

Re: Re: [UML Forum] state pattern in UML

dgla...@glaserresearch.net — Tue, 08 May 2012 16:31:33 UT

Responding to H. S. Lahman -

Do you have any pointers to "good" mappings of state machines to code?

-David
============================== ===
You are bringing coals to Newcastle. B-) I have been advocating
translation techniques (full code generation from a 4GL model) for over
two decades.

Re: [UML Forum] state pattern in UML

peter.o.muel...@gmx.de (Peter Mueller) — Tue, 08 May 2012 17:55:57 UT

Hi,

Am 08.05.2012 um 16:58 schrieb "H. S. Lahman" <h.lah...@verizon.net>:

I agree. For a generator the GoF pattern does not make sense from point of view either. I offer a generator especially for the embedded domain ([link]). And the generated code is simply based on switch/case and if/else if constructs - clear, easy to understand and compact.

Re: [UML Forum] state pattern in UML

h.lah...@verizon.net (H. S. Lahman) — Tue, 08 May 2012 14:58:56 UT

Responding to Mueller...

You are bringing coals to Newcastle. B-) I have been advocating
translation techniques (full code generation from a 4GL model) for over
two decades.

The caution I have, though, is the one I expressed to the OP. Too often
the piecemeal code generators that just do UML Statecharts use the GoF

Re: [UML Forum] state pattern in UML

dgeorge83...@gmail.com (Dan George) — Mon, 07 May 2012 19:23:12 UT

I agree. It would be easy to screw up the alphabet restriction using Mealy
notation. The convenience of Mealy notation comes when the action to be
performed depends on the "from" state. Many transitions can be drawn, each
with it's own action attached, to a single destination state. Despite being

Re: [UML Forum] state pattern in UML

peter.o.muel...@gmx.de (Peter Mueller) — Mon, 07 May 2012 17:11:36 UT

Hi,

think about generating code from UML state machines. Generating state machines is very well understood and can save you really a lot of manual coding work. Good generators also perform model checks which helps to make sure your model is complete regarding principal issues e.g. init states defined, no transitions without events ...

Re: [UML Forum] state pattern in UML

h.lah...@verizon.net (H. S. Lahman) — Mon, 07 May 2012 15:10:06 UT

Responding to George...

Sounds fine. My only caveat is that the Mealy model (actions on
transitions) is mathematically equivalent. Thus one can have multiple,
different actions to enter the state, but since only one transition is
triggered, only one action with one set of rules and poliices is

Re: [UML Forum] state pattern in UML

dgeorge83...@gmail.com (Dan George) — Sun, 06 May 2012 16:37:33 UT

H.S., your comment about a state having only one action could use a little
more explanation.
I'll try but I really recommend you all get Lahman's book. The state action
is performed upon entry to the state. Thus, there can be only one action
and it must always be the same. If a different action is needed then, by

Re: [UML Forum] state pattern in UML

h.lah...@verizon.net (H. S. Lahman) — Fri, 04 May 2012 16:28:21 UT

Responding to li...

The short answer is: exactly the same way you would show any other
object collaborations.

The parent State class defines a suite of actions that each subclass
implements differently. Those actions are invoked in collaboration just
like any other object's actions in an SD. One swimlane is the object