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Wed, 09 August 2017 13:00

Eclipse User

Dear,

In my metamodel I have defined that the meta-class attribute has an "attributeType" datatype as you can see in the following image:
index.php/fa/30338/0/

Now, those attributes are contained in an Entity container. When the Entity container is the target class and I use the following statement: aql:self.attribute.attributeType.oclIsTypeOf(uMLEER::AttributeType::primaryKey), it always returns false, regardless of the attributeType...

I am definitely doing something wrong, although I can't seem to find what it is.

Kind regards,

Sonny

Attachment: Schermafbeelding 2017-08-09 om 18.55.45.png
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Re: oclIsTypeOf() [message #1770298 is a reply to message #1770294]

Wed, 09 August 2017 14:19

Eclipse User

Hi

It is usually better to use oclIsKindOf rather than oclIsTypeOf.

oclIsKindOf tests for type conformance. primaryKey is an enumeration literal.

Regards

Ed Willink

Re: oclIsTypeOf() [message #1770359 is a reply to message #1770298]

Thu, 10 August 2017 07:59

Eclipse User

Hey Ed,

Thank you for your reply. I have tried both actually, and none worked. As you said, this might be due to the fact that primaryKey is an enumeration literal.

For my other tools I just used the statement aql:self.attribute.attributeType=uMLEER::AttributeType::primaryKey, which works fine.

But now, the self is an entity, which can contain multiple attributes, but can only contain one attribute with the type primaryKey. So I made a validation rule that should count how many attributes there are with the datatype primaryKey. If there is more than one, there is an error.

So what I need to know is how i can count how many instances of attribute have the type primaryKey for the self.

Thank you very much for your help in advance.

Kind regards,
Sonny Selhorst

Re: oclIsTypeOf() [message #1770370 is a reply to message #1770359]

Thu, 10 August 2017 08:36

Eclipse User

Hi

The assignment works fine because it is type consistent; enum literal to enum literal.

The type test fails because you are not testing for a type.

Perhaps you want something like ...->selectByKind(uMLEER::Attribute)->select(attributeType = uMLEER::AttributeType::primaryKey)->size()

selectByKind() is a moderately recent OCL addition. Perhaps it is filter() in AQL.

Regards

Ed Willink

Re: oclIsTypeOf() [message #1770387 is a reply to message #1770370]

Thu, 10 August 2017 11:55

Eclipse User

Thank you very much for your answers Ed, your reasoning has helped me identify the problem, I have solved it with the following statement:

aql:self.attribute.attributeType->count(uMLEER::AttributeType::primaryKey)<2

Have a great day!

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