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| Re: Specifying non-empty model attributes [message #414372 is a reply to message #414369] |
Fri, 02 November 2007 18:51  |
 Ed Merks
Messages: 33133
Registered: July 2009 |
Senior Member |
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Eric,
In XML Schema it's possible to specify a minLength facet (constraint) on
a simple type definition that restricts xsd:string. Such a data type
will map to an EDataType with the necessary ExtendedMetaData annotations
that will drive the validator to complain if the string is not at least
of that length. So you could create an EDataType to wrap EString, with
exactly those same annotations to get that same result. Or you could
define a named constraint on the feature's containing class and write
the code to do the validation in the generated validator...
Eric Rizzo wrote:
> Is it possible, in the .ecore editor, to specify that a String
> attribute's value must be non-empty? I can set Required=true but that
> still allows empty string and strings that only contain whitespace.
> Do I have to use OCL for this?
>
> TIA,
> Eric
Ed Merks
Professional Support: https://www.macromodeling.com/
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