28 Jan
2018
28 Jan
'18
5:22 p.m.
Rereading "Magritte – A Meta-Driven Approach to Empower Developers and End
Users", I found the following very interesting passage on page 5:
Magritte does not provide specific functionality to
describe behavioral
aspects, such as operations, their parameters and return values [17,9].
This is not necessary, as methods in Smalltalk are objects that can be
described as any other object. Then using the reflective facilities it is
possible to retrieve a list of invokable method sends (first class method
invocations) that are available on a particular class. On request these
methods can be invoked with arguments provided by end users.
Can anyone provide or point to an example of the above in actual use? It is
very intriguing but I'm not clear how one would go about implementing it!
-----
Cheers,
Sean
--
Sent from: http://forum.world.st/Magritte-Pier-and-Related-Tools-f115649.html
28 Jan
28 Jan
9:59 p.m.
Have a look at the command design pattern described in The Design Patterns
Smalltalk Companion
<https://www.amazon.com/Design-Patterns-Smalltalk-Companion/dp/0201184621>.
Annotate the accessor methods that configure the command with Magritte; let
the user edit the command object; then execute the command as described in
the book.
Pier pretty much builds around this pattern for all user invokable behavior
(see the PRCommand hierarchy).
Early versions of Pier used some kind of a naming convention to describe
the arguments of methods. This was not very readable and led to problems
with reusability and extensibility of commands.
Cheers,
Lukas
On 28 January 2018 at 17:22, Sean P. DeNigris <sean(a)clipperadams.com> wrote:
Rereading "Magritte – A Meta-Driven Approach to
Empower Developers and End
Users", I found the following very interesting passage on page 5:
--
Lukas Renggli
www.lukas-renggli.ch
Magritte does not provide specific functionality
to describe behavioral
aspects, such as operations, their parameters and return values [17,9].
This is not necessary, as methods in Smalltalk are objects that can be
described as any other object. Then using the reflective facilities it is
possible to retrieve a list of invokable method sends (first class method
invocations) that are available on a particular class. On request these
methods can be invoked with arguments provided by end users.
Can anyone provide or point to an example of the above in actual use? It is
very intriguing but I'm not clear how one would go about implementing it!
-----
Cheers,
Sean
--
Sent from: http://forum.world.st/Magritte-Pier-and-Related-
Tools-f115649.html
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Magritte, Pier and Related Tools ...
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10:51 p.m.
Lukas Renggli wrote
Have a look at the command design pattern… Early
versions of Pier used
some kind of a naming convention… and led to problems with reusability and
extensibility of commands
Hey, Lukas! Thanks, that clears it up. The methods are reified in the model
itself and then *that* is meta-described.
-----
Cheers,
Sean
--
Sent from: http://forum.world.st/Magritte-Pier-and-Related-Tools-f115649.html
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