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Ecore defaultValue for EByteArray or EFloat with multiplicities [message #1226878]

Thu, 02 January 2014 19:29

Eclipse User

Hi,

I have a question regarding to the default values in an ecore model:

Is it possible to set a default value for an attribute of type

EByteArray

(with upper and lower bound = 3) or for an attribute of type

EFloat

(with upper and lower bound = 3)?

When I try that I get only something like:

The default value literal ... must be a valid literal of the attribute's type.

Thanks, Meiner.

Re: Ecore defaultValue for EByteArray or EFloat with multiplicities [message #1227105 is a reply to message #1226878]

Fri, 03 January 2014 10:02

Eclipse User

No, you can't specify default values for multi-valued features. In both
these cases, I suspect you should be defining an EDataType to represent
a byte[] or float "tuple" and then you're dealing again with a
single-valued feature which can have a default value.

On 03/01/2014 2:22 PM, Klaus Meiner wrote:
> Hi,
>
> I have a question regarding to the default values in an ecore model:
>
> Is it possible to set a default value for an attribute of type
> EByteArray (with upper and lower bound = 3) or for an attribute of
> type EFloat (with upper and lower bound = 3)?
>
> When I try that I get only something like:
>
> The default value literal ... must be a valid literal of the
> attribute's type.
>
>
> Thanks, Meiner.

Re: Ecore defaultValue for EByteArray or EFloat with multiplicities [message #1694614 is a reply to message #1227105]

Wed, 06 May 2015 12:29

Eclipse User

How can one provide a default attribute value for a generic type?

for generic types a create???FromString is generated but never invoked despite including a default String value in an ecore model.

e.g.
genericType.ecore defines generic type

example.ecore includes a genericType with default String value

It appears that the implementation does not handle default generic type values.

since EDataType will not have any reference to the required type it appears that it is not doable. create???FromString would require some kind of "hint" for the types required.

Nevertheless, initializePackageContents does record the default String Literal for the generic type attribute. Is it not possible to have a create???FromString using the Attribute argument so the correct type information can be derived for a new instance?

[Updated on: Wed, 06 May 2015 12:56] by Moderator

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