[news.eclipse.modeling.gmf] Ocl question- check string is an integer sim

[aachila@xxxxxxxxxxx (Achilleas )]

Hi,

I would like to ask if there is any way to check if a String is an Integer 
using an Ocl constraint.

For example in java you can do something like:
1. Integer.parseInt(myString) and catch the exception or  
2. boolean isInteger = Pattern.matches("^\d*$", myString)

Is there any way to perform something similar to the above in OCL? 

I tried to use something like self.value.oclIsTypeOf(Integer) but the 
oclIsTypeOf property deals with the direct type of an object.
e.g. context Person
         inv: self.oclIsTypeOf( Person ) -- is true
         inv: self.oclIsTypeOf( Company) -- is false

I tried to use something like self.value.oclIsKindOf(Integer) but the 
oclIsKindOf property determines whether value is either the direct type or 
one of the supertypes of an object.

Any suggestions how this can be done?

Thanks,

Achilleas