I have an ecore meta-class called PropertySpecValueSet which has two associations.
PropertySpecValueSet --> 1..n allowedValue: PropertySpecValue
PropertySpecValueSet --> 0..1 defaultValue: PropertySpecValue
I create instances as follows:
There are four child allowed values (Monthly, Quarterly, Semi-Annual, Yearly)
There is one default value (Monthly)
When I run the transform (Instance of ECore model --> XMI), the instance 'Monthly' is encountered twice, but the second mapping overwrites the first mapping resulting in the following incorrect output:
<propertySpecValueSet>
<allowedValue value="Yearly"/>
<allowedValue value="Quarterly"/>
<allowedValue value="Semiannual"/>
<defaultValue value="Monthly"/>
</propertySpecValueSet>
This is my QVT code:
mapping PMSMG::PropertySpecValueSet::toPropertySpecValueSet() : SMG::PropertySpecValueSet {
allowedValue += self.allowedValue -> toPropertySpecValue();
defaultValue := self.defaultValue.map toPropertySpecValue();
}
mapping PMSMG::PropertySpecValue::toPropertySpecValue() : SMG::PropertySpecValue {
value := self.value;
}
I thought resolve would solve this problem, so I coded the following which had no impact on the output:
mapping PMSMG::PropertySpecValueSet::toPropertySpecValueSet() : SMG::PropertySpecValueSet {
allowedValue += self.allowedValue.resolve(SMG::PropertySpecValue);
if (allowedValue -> size() = 0) then {
allowedValue += self.allowedValue -> toPropertySpecValue();
}
endif;
defaultValue := self.defaultValue.resolveone(_t:SMG::PropertySpecValue|_t.value = self.defaultValue.value);
if (defaultValue.oclIsUndefined()) then {
defaultValue := self.defaultValue.map toPropertySpecValue();
}
endif;
}
mapping PMSMG::PropertySpecValue::toPropertySpecValue() : SMG::PropertySpecValue {
value := self.value;
}
Finally, the solution we came up with was to explicitly create the objects which resulted in the following correct output:
<propertySpecValueSet>
<allowedValue value="Monthly"/>
<allowedValue value="Yearly"/>
<allowedValue value="Quarterly"/>
<allowedValue value="Semiannual"/>
<defaultValue value="Monthly"/>
</propertySpecValueSet>
The transform code that produced the above output is here:
mapping PMSMG::PropertySpecValueSet::toPropertySpecValueSet() : SMG::PropertySpecValueSet {
self.allowedValue->forEach(av) {
allowedValue += object SMG::PropertySpecValue {
value := av.value;
code += av.allSubobjectsOfType(PMSMG::Code).oclAsType(PMSMG::Code)->toCode();
}
};
defaultValue := object SMG::PropertySpecValue {
value := self.defaultValue.value;
code += self.defaultValue.allSubobjectsOfType(PMSMG::Code).oclAsType(PMSMG::Code)->toCode();
}
}
So - is this the right solution? Is there an easier way? Seems odd to have to write object creation code.
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