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How to achieve selecting impl of interface [message #1618807]

Mon, 16 February 2015 01:20

Eclipse User

Hi

I am trying to achieve the following.
Using xcore, I would like have the possiblity of dynamically selecting which implementation of an interface to use. So, if I was using the Dynamic Instance, when adding a Child to the family, I would be able to choose if it is a Boy or a Girl.

The following is just a simple example to demonstrate what I am trying to achieve.

package sample

class Family{
	String father
	String mother
	container Child[] children opposite family
}

interface Child{
	
	
}
class Boy extends Child{
	container Family family opposite children
	String name	
}
class Girl extends Child{
	container Family family opposite children
	String name		
}

Can anyone recommend how to do this?

Thanks and regards

Re: How to achieve selecting impl of interface [message #1619013 is a reply to message #1618807]

Mon, 16 February 2015 04:25

Eclipse User

Anton,

Isn't what you describe that you want exactly what you already get?

On 16.02.2015 07:20, Anton Hughes wrote:
> Hi
>
> I am trying to achieve the following. Using xcore, I would like have the
> possiblity of dynamically selecting which implementation of an interface
> to use. So, if I was using the Dynamic Instance, when adding a Child to
> the family, I would be able to choose if it is a Boy or a Girl.
>
> The following is just a simple example to demonstrate what I am trying
> to achieve.
>
>
> package sample
>
> class Family{
> String father
> String mother
> container Child[] children opposite family
> }
>
> interface Child{
>
>
> }
> class Boy extends Child{
> container Family family opposite children
> String name
> }
> class Girl extends Child{
> container Family family opposite children
> String name
> }
>
>
> Can anyone recommend how to do this?
>
> Thanks and regards

Re: How to achieve selecting impl of interface [message #1619038 is a reply to message #1619013]

Mon, 16 February 2015 04:43

Eclipse User

Ed Merks wrote on Mon, 16 February 2015 09:25

Anton,

Isn't what you describe that you want exactly what you already get?

Hi Ed
Thanks for the reply.
I wish it was! Alas, I am certainly missing something - though I do not know what.
I am getting the following errors:
Quote:

'Couldn't resolve reference to GenFeature 'family'.'

And
Quote:

'The opposite of the opposite may not be a reference different from this one'

Re: How to achieve selecting impl of interface [message #1619178 is a reply to message #1619038]

Mon, 16 February 2015 06:40

Eclipse User

I received the answer via another, very helpful, source:

class Family{
	String father
	String mother
	container Child[] children opposite family
}

interface Child{
	container Family family opposite children
}
class Boy extends Child{
	String name	
}
class Girl extends Child{
	String name		
}

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