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[ATL] EEnum to EClass [message #546793]

Wed, 14 July 2010 09:00

Izaak van Niekerk

Messages: 35
Registered: June 2010

Member

I need to transform a class X with an EEnum attribute called Y of value "B" into the next model where class X will have a reference to EClass Y that has a String description attribute with the value "B".
And all other class X transformations that point to the same EEnum will also have to reference that same new EClass Y when transformed.

In otherwords EEnum Y needs to be transformed into EClass Y and all the objects that were referencing this enumeration value will now have a reference to this newly created EClass Y.

Can somebody please help me with how I would go about constructing these rules? I don't want to create a new instance of EClass with a value "B" everytime I find the value, so I probably need some way of pre-transforming all the enumeration values into instances of EClass Y before hand and then somehow find a reference to them during transformation of class X?

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Re: [ATL] EEnum to EClass [message #547393 is a reply to message #546793]

Fri, 16 July 2010 15:07

Freddy Allilaire

Messages: 130
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------010902090805020901030107
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

Dear Izaak,

I don't really understand well your problem. Could you please give us
more details (e.g. about your metamodels)?

Thanks,
Freddy.

Le 14/07/2010 11:00, Izaak a écrit :
> I need to transform a class X with an EEnum attribute called Y of value
> "B" into the next model where class X will have a reference to EClass Y
> that has a String description attribute with the value "B".
> And all other class X transformations that point to the same EEnum will
> also have to reference that same new EClass Y when transformed.
>
> In otherwords EEnum Y needs to be transformed into EClass Y and all the
> objects that were referencing this enumeration value will now have a
> reference to this newly created EClass Y.
>
> Can somebody please help me with how I would go about constructing these
> rules? I don't want to create a new instance of EClass with a value "B"
> everytime I find the value, so I probably need some way of
> pre-transforming all the enumeration values into instances of EClass Y
> before hand and then somehow find a reference to them during
> transformation of class X?

--------------010902090805020901030107
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YmVnaW46dmNhcmQNCmZuOkZyZWRkeSBBbGxpbGFpcmUNCm46QWxsaWxhaXJl O0ZyZWRkeQ0K
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Re: [ATL] EEnum to EClass [message #547402 is a reply to message #546793]

Fri, 16 July 2010 15:50

Vincent MAHE

Messages: 129
Registered: July 2009

Senior Member

Le 14/07/2010 11:00, Izaak a écrit :
> I need to transform a class X with an EEnum attribute called Y of value
> "B" into the next model where class X will have a reference to EClass Y
> that has a String description attribute with the value "B".
> And all other class X transformations that point to the same EEnum will
> also have to reference that same new EClass Y when transformed.
>
> In otherwords EEnum Y needs to be transformed into EClass Y and all the
> objects that were referencing this enumeration value will now have a
> reference to this newly created EClass Y.
>
> Can somebody please help me with how I would go about constructing these
> rules? I don't want to create a new instance of EClass with a value "B"
> everytime I find the value, so I probably need some way of
> pre-transforming all the enumeration values into instances of EClass Y
> before hand and then somehow find a reference to them during
> transformation of class X?

You have to generate the B instance for the enum in a "unique called
rule" which parameter is the enum value. Doing so, each you encounter a
given value of this enum, ATL will return the same B corresponding instance.
--
Cordialement

Vincent MAHÉ

Ingénieur Expert - Projet IDM++ - Équipe AtlanMod
École des Mines de Nantes
La Chantrerie - 4, rue Alfred Kastler
B.P. 20722 - F-44307 NANTES Cedex 3
Tel: (33)2 51 85 81 00

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Re: [ATL] EEnum to EClass [message #547406 is a reply to message #547402]

Fri, 16 July 2010 16:14

Izaak van Niekerk

Messages: 35
Registered: June 2010

Member

Hi Vincent,

Would this rule also create one instance of "B" then so that it can be referenced every time "B" is encountered?

@Freddy

> Could you please give us more details (e.g. about your
> metamodels)?

Version 1:
--------------
Class "RoleSpec" has a feature "conformanceType" that is of type "RoleSpecTypeExplorer".

"RoleSpecTypeExplorer" is an Enumrator with values:
Party = 0, Account = 1, Place=2, Agreement=3

Version 2:
--------------
Class "RoleSpec" has a feature "conformanceType" that is of type "Type".

"Type" is a class with a feature "name" of type String.

So when Version1 is transformed to Version2, RoleSpec's feature comformanceType must be transformed from an enumeration to a class, and an instance of Type must be created with name set to "Party" or "Account" or "Place" etc.

One instance of each enumeration must be created and every RoleSpec that for instance have a conformanceType with enumeration value of "Party" must reference that same instance of Type with name "Party".

Hope this is more clear?

[Updated on: Fri, 16 July 2010 19:28]

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Re: [ATL] EEnum to EClass [message #547633 is a reply to message #547406]

Mon, 19 July 2010 08:30

Vincent MAHE

Messages: 129
Registered: July 2009

Senior Member

Le 16/07/2010 18:14, Izaak a écrit :
> Hi Vincent,
>
> Would this rule also create one instance of "B" then so that it can be
> referenced every time "B" is encountered?

You can call another unique rule to create B and use this rule every
time you need to get a B instance
--
Cordialement

Vincent MAHÉ

Ingénieur Expert - Projet IDM++ - Équipe AtlanMod
École des Mines de Nantes
La Chantrerie - 4, rue Alfred Kastler
B.P. 20722 - F-44307 NANTES Cedex 3
Tel: (33)2 51 85 81 00

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Re: [ATL] EEnum to EClass [message #547847 is a reply to message #547633]

Mon, 19 July 2010 19:08

Izaak van Niekerk

Messages: 35
Registered: June 2010

Member

Thank you Freddy and William for all the help!

The following code did the trick:

helper def: enumMap : Map(PMWV1!Location, String) =
Map {(#IL, 'IL'), (#AZ, 'AZ'), (#AK, 'AK')};

helper def: enumByName : Map(PMWV1!Location, PMWV2!CriteriaAllowedValue) = Map {};

helper def: getEnum(s : PMWV1!Location) : OclAny =
if (thisModule.enumByName.containsKey(s)) then
(thisModule.enumByName.get(s))
else
(thisModule.enum(s))
endif;

rule enum(s : PMWV1!Location) {
to
t : PMWV2!CriteriaAllowedValue(
description <- thisModule.enumMap.get(s)
)
do {
thisModule.enumByName <- thisModule.enumByName.including(s, t);
t;
}
}

Basically build up a map of the instances created and first check the map for an instance before creating one again...

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Re: [ATL] EEnum to EClass [message #547912 is a reply to message #546793]

Tue, 20 July 2010 07:41

Sylvain EVEILLARD

Messages: 556
Registered: July 2009

Senior Member

Using the keyword unique you can simplify that to :

helper def: enumMap : Map(PMWV1!Location, String) =
Map {(#IL, 'IL'), (#AZ, 'AZ'), (#AK, 'AK')};

unique lazy rule enum{
from s : PMWV1!Location
to
t : PMWV2!CriteriaAllowedValue(
description <- thisModule.enumMap.get(s)
)
}

Though it's a lazy rule, the call to it is the same as with the called rule.

[Updated on: Tue, 20 July 2010 07:42]

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